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WO2018172899A1 - Système de lumière automatique - Google Patents

Système de lumière automatique Download PDF

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Publication number
WO2018172899A1
WO2018172899A1 PCT/IB2018/051798 IB2018051798W WO2018172899A1 WO 2018172899 A1 WO2018172899 A1 WO 2018172899A1 IB 2018051798 W IB2018051798 W IB 2018051798W WO 2018172899 A1 WO2018172899 A1 WO 2018172899A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle
light system
unit
delay unit
automatic light
Prior art date
Application number
PCT/IB2018/051798
Other languages
English (en)
Inventor
Partha Biswas
Harigovindh KRISHNAMURTHY
Arumugham SIVAKUMAR
Original Assignee
Tvs Motor Company Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tvs Motor Company Limited filed Critical Tvs Motor Company Limited
Publication of WO2018172899A1 publication Critical patent/WO2018172899A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/14—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means
    • B60Q1/1407—General lighting circuits comprising dimming circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/16—Controlling the light source by timing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2400/00—Special features or arrangements of exterior signal lamps for vehicles
    • B60Q2400/30—Daytime running lights [DRL], e.g. circuits or arrangements therefor

Definitions

  • the present subject matter relates to a vehicle. More particularly, the present subject matter relates to an automatic light system for the vehicle.
  • Automotive lighting systems are evolving in several areas including the use of automatic headlight ON system intended to increase the visibility of the motor vehicle to others when vehicle headlamps are turned on.
  • automatic headlight ON system intended to increase the visibility of the motor vehicle to others when vehicle headlamps are turned on.
  • headlamp activation systems which will automatically turn on at least the headlamp low beams when the vehicle is being operated, and turning them off when the vehicle engine is turned off.
  • millions of automobiles on the road could benefit from the enhanced visibility and safety offered by daytime headlamp operation.
  • the headlamp being a huge electrical load is actuated through an A.C (alternating current) power supply (alternating current) generated by a permanent magnet generator.
  • A.C alternating current
  • the headlamp is kept constantly actuated following the starting of the engine which deteriorates the engine startability and thus increases the engine load. Thus, reducing fuel efficiency of the vehicle.
  • Another known automatic light system for the vehicle includes a method of improving engine startability wherein the load on the permanent magnet generator load is reduced during engine starting.
  • a battery charging voltage is reduced to a lower target value during engine starting and a headlamp supply voltage is reduced using Pulse Width Modulation (PWM) PWM.
  • PWM Pulse Width Modulation
  • DC Direct Current
  • An existing vehicle lighting system includes at least one electronic control unit and at least one switch controlled to supply an output regulated A.C power from a regulator and rectifier unit to at least one A.C load including the vehicle headlamp.
  • said at least one electronic control unit receives input from said regulator and rppti f unit (RR) to estimate the frequency of the signal which is the rotational speed of the engine crankshaft.
  • the electronic control unit fetches this frequency reading and decides when to allow power to the lighting loads depending upon the frequency threshold set in the internal logic. This enables engine speed based control of power delivery to lighting loads.
  • the system is not immune to coupled noise or transients in the input signal and it might estimate wrong frequency which in turn leads to wrong engine speed estimation.
  • said vehicle lighting system with said at least one electronic control unit and said at least one switch increases the number of the parts and components on the vehicle, hence increasing the number of wiring connections and additionally increasing assembly time for the parts and components on vehicle.
  • Fig.l is a schematic circuit diagram of an automatic light system illustrating a delay unit as per first embodiment of the present invention.
  • Fig.2 is a schematic circuit diagram of the automatic light system illustrating the delay unit as per second embodiment of the present invention.
  • Fig.3 is a schematic circuit diagram of the delay unit illustrating at least one gate trigger circuit including a first resistor of at least one current limiting resistor as per first and second embodiment of the present invention.
  • Fig. 4 is a schematic circuit diagram of the delay unit illustrating said at least one gate trigger circuit including a second resistor and a third resistor of said at least one current limiting resistor as per first and second embodiment of the present invention.
  • a continuous headlamp ON condition for motor vehicles involves a plurality of electronic and electrical modifications in the vehicle light system.
  • a headlamp switch module electrically coupled to the headlamp and one or more wiring connections in the circuitry of the headlamp are modified in order to change the circuitry design for the vehicle light system.
  • the headlamp being a huge electrical load for a permanent magnet generator is actuated through an A.C (alternating current) power supply (alternating current).
  • A.C alternating current
  • the automatic light system with the continuous ON headlamp following the starting of the engine deteriorates the engine startability and thus increases the engine load.
  • degrading the fuel economy of the vehicle degrading the fuel economy of the vehicle.
  • the problem of the engine startability and the engine loading can be overcome by switching over to LED headlamps, one or more light sources of lower power consumption or alternatively installing daytime running lamp (DRL) on the vehicle.
  • DRL daytime running lamp
  • installation of the LED headlamps or alternatively daytime running lights (DRL) on the vehicle increases the number of components, number of wiring connections on the vehicle and thus increasing the overall cost and assembly time on the vehicle and furthermore providing a complex design to the automatic light system for the vehicle.
  • the present invention relates to an improved automatic light system for the vehicle including a permanent magnet generator coupled with the engine for producing an alternating current, a battery operatively connected with said permanent magnet generator to be charged therefrom, a regulator and rectifier (RR) unit operatively connected to said permanent magnet generator for receiving the alternating current.
  • a permanent magnet generator coupled with the engine for producing an alternating current
  • a battery operatively connected with said permanent magnet generator to be charged therefrom
  • a regulator and rectifier (RR) unit operatively connected to said permanent magnet generator for receiving the alternating current.
  • said regulator and rectifier (RR) unit includes at least one gate control circuit and a shunt configuration of at least two primary electronic switches.
  • said at least one gate control circuit is configured to regulate said alternating current on said at least two primary electronic switches for supplying an output regulated and rectified voltage D.C power and an output regulated voltage A.C power to at least one D.C load and at least one A.C load respectively.
  • said at least one A.C load includes at least one lighting and signalling device having an input connected to an output of said regulator and rectifier (RR) unit for receiving said output regulated voltage A.C power.
  • said at least one lighting and signalling device is the headlamp.
  • said automatic light system for the vehicle further comprises the delay unit including at least one gate trigger circuit and at least one auxiliary electronic switch.
  • said delay unit is a two-wire circuit comprising of at least one input terminal and at least one output terminal.
  • said at least one auxiliary electronic switch is electrically connected between said at least one input terminal and said at least one output terminal of the delay unit.
  • each of said at least two primary electronic switches is a Silicon Controlled Rectifier (SCR) and said at least one auxiliary electronic switch is from a group consisting a TRIAC, reverse parallel connected transistors, thyristors, MOSFETs and electromechanical relay.
  • SCR Silicon Controlled Rectifier
  • said at least one gate trigger circuit is electrically coupled to said at least one auxiliary electronic switch.
  • said at least one gate trigger circuit comprises at least one current limiting resistor R, Rl, R2 and at least one zener diode ZD1, ZD2.
  • said regulator and rectifier (RR) unit includes said at least one gate control circuit and the shunt configuration of said at least two first electronic switches.
  • said at least one gate control circuit is configured to regulate said alternating current on said at least two primary electronic switches for supplying an output regulated and rectified voltage D.C power and an output regulated voltage A.C power to at least one D.C load and at least one A.C load respectively.
  • delaying a gate trigger through said at least one gate control circuit to an A.C line of said output regulated voltage A.C power of said regulator and rectifier (RR) unit doesnot provide delay in the supply of said output regulated voltage A.C power to said at least one A.C load including the headlamp. Therefore, as per first embodiment, said delay unit is electrically coupled between the permanent magnet generator and the regulator and rectifier (RR) unit and as per second embodiment, said delay unit is electrically coupled between said output regulated voltage A.C power of said regulator and rectifier (RR) unit and said at least one A.C load.
  • the present invention relates to the improved automatic light system including the delay unit to prevent actuation of said at least one signalling and lighting device including the headlamp before the engine attains the predetermined speed following start-up.
  • said at least one gate trigger circuit controls power delivery to said at least one signalling and lighting device including the headlamp, until the engine attains the predetermined speed of 1000 rpm following start-up.
  • the object of the present invention is to provide the improved automatic light system with the delay unit as a two-wire circuit and hence provides a compact, cost effective installation on the vehicle and further involves minimum number of the wiring connections and mounting provisions and provides a delaying effect in supplying the A.C power supply to said at least one lighting and signalling device including the headlamp. Hence, improving the engine startability and providing better fuel economy with lower cranking load.
  • the purpose of the present invention is to provide an improved automotive light system for automotive vehicular use.
  • a particular objective is to install the delay unit as the two-wire circuit on the vehicle and hence provide a simple design with said delaying effect in actuation of the headlamp following the starting of the engine.
  • the present invention relates to the delay unit provided with the two-wire circuit including said at least one input terminal and said at least one output terminal and hence, imparting a simple structure and minimum number of wiring connections for installation on the vehicle.
  • the delay unit actuates the headlamp after a predetermined period of time following the starting of the engine and hence facilitating reduced engine load and improved engine startability.
  • said at least one gate control circuit of said regulator and rectifier (RR) unit controls the power delivery to the headlamp, after the engine attains the predetermined speed.
  • said predetermined engine speed is 1000 rpm.
  • the present invention provides the improved automatic light system with the delay unit.
  • the delay unit is the two-wire circuit and thus comprises few electronic components including said at least one gate trigger circuit and said at least one auxiliary electronic switch.
  • the delay unit in said automatic light system can be packaged within a small enclosure and attached with minimum number of wiring harness on motor vehicles including the motorcycle type of two wheeled vehicles and the scooter type of two-wheeled vehicles.
  • the delay unit can be arranged within said regulator and rectifier (RR) unit and thereby the aluminium heat sink of the shunt configuration of said two Silicon Controlled Rectifier (SCRs) within the regulator and the rectifier (RR) unit can dissipate the heat generated due to power dissipation in the TRIAC (Triode for Alternating Current).
  • a more precise triggering of said at least one auxiliary electronic switch including the TRIAC can be achieved with an electronic control unit used for spark ignition in the vehicle such as a Capacitive Discharge Ignition (CDI) unit or a Transistor Controlled Ignition (TCI) unit.
  • CDI Capacitive Discharge Ignition
  • TCI Transistor Controlled Ignition
  • the present invention relates generally to the automatic light system and more particularly to the light system with a delay unit for delaying the time within which said at least one A.C load including said at least one lighting and signalling device such as the headlamps of the vehicle is energized after the engine of the vehicle attains the predetermined speed.
  • the delay unit controls power delivery to said at least one A.C load including the vehicle headlamp by allowing the power to reach the vehicle headlamp only after the engine attains the predetermined speed which is 1000 rpm.
  • said at least one auxiliary electronic switch as said TRIAC enables gradual increase in power delivery to said at least one signalling and lighting device including the vehicle headlamps as compared to said conventional automatic light system with an electromechanical relay having disadvantages of interrupting supply instantaneously resulting in huge currents in said at least one A.C load including the headlamp and thus reducing the shelf-life of the headlamps.
  • the delay unit is connected in an A.C (alternating current) line of the output regulated voltage A.C power of the regulator and rectifier (RR) unit.
  • said delay unit is electrically coupled between the permanent magnet generator and the regulator and rectifier (RR) unit.
  • said delay unit is connected between said output regulated voltage A.C power of said regulator and rectifier (RR) unit and said at least one A.C load of automatic light system.
  • the delay unit comprises said at least one auxiliary electronic switch as the TRIAC which allows current supply in said at least one A.C load including the vehicle headlamp only when the amplitude of generated said output regulated voltage A.C power of said regulator and rectifier (RR) unit exceeds a predetermined value.
  • the present invention relates to the two-wire delay unit provided for delaying the actuation of the vehicle headlamp for the predetermined period of time until the engine has attained the predetermined speed that is, 1000 rpm.
  • the delay unit employs an effective said at least one gate trigger circuit and said at least one auxiliary electronic switch.
  • said at least one gate trigger circuit is electrically coupled to said at least one auxiliary electronic switch.
  • said at least one gate trigger circuit comprises said at least one current limiting resistor R, Rl, R2 and at least one zener diode ZD1, ZD2.
  • said at least one auxiliary electronic switch is a TRIAC.
  • said TRIAC which allows current flow in both directions based on an input of said at least one gate trigger input.
  • the TRIAC receives trigger signals through said at least one gate trigger circuit including said at least one current limiting resistor R, Rl, R2 and at least one zener diode ZD1, ZD2.
  • the ratings of R, Rl, R2, ZD1 and ZD2 are selected as per the alternating voltage generated by the permanent magnet generator for the required load condition and the predetermined speed of the engine beyond which the generated power should be delivered to said at least one A.C load.
  • the two-wire delay unit prevents the headlamps of the motor vehicle from being actuated until the engine attains the predetermined speed.
  • the present invention relates to said improved automatic light system in which the output regulated voltage A.C power of said rectifier and regulator (RR) unit is delayed during engine starting by said at least one gate trigger circuit triggering when amplitude of the alternating voltage of the permanent magnet generator exceeds a predetermined value.
  • RR rectifier and regulator
  • the object of the present invention is to provide the two- wire delay unit.
  • the main power is supplied to said at least one input terminal of the delay unit by means of switching on the vehicle ignition switch (starting the engine).
  • the vehicle is started and the delay unit is delayedly energized to delay output regulated voltage A.C power from the regulator and rectified unit (RR) to the vehicle headlamp.
  • said delay unit includes said at least one gate trigger circuit and said at least one auxiliary electronic switch.
  • said at least one auxiliary electronic switch including the TRIAC is electrically connected between said at least one input terminal and said at least one output terminal of the delay unit.
  • the permanent magnet generator parallely generates power for fully supplying power. That is, when said engine attains the predetermined speed of 1000 rpm, then said output regulated voltage A.C power of said regulator and rectifier (RR) unit is distributed to the said at least one A.C load including the vehicle headlamp.
  • RR regulator and rectifier
  • Yet another object of this invention is to provide the delay unit as a two-wire control circuitry for the automatic light system for the vehicle for providing a delaying effect in supplying the A.C (alternating current) power supply to the vehicle headlamp after the predetermined period of the time following the starting of the engine.
  • present invention relating to the delay unit is electrically coupled between the permanent magnet generator and the regulator and rectifier (RR) unit, as per first embodiment of the present invention.
  • the two-wire delay unit is electrically coupled between said output regulated voltage A.C power of said regulator and rectifier (RR) unit and said at least one A.C load.
  • the present invention relates to the delay unit being a two-wire circuit for controlling the energization of motor vehicle headlamps.
  • the present invention relates to the two-wire delay unit for turning ON the headlamps of the motor vehicle. Further, the present invention relates to an automatic light system for controlling the actuation of the vehicle headlight.
  • the object of the invention is to provide the delay unit as a headlamp control apparatus which can cause the headlamps to be turned on after a predetermined period of time following the starting of the engine.
  • the present invention provides the improved automatic light system that is adapted for normal operation when the vehicle engine is in operation, and the delay unit automatically turns ON the headlamp after the engine attains the pre determined speed.
  • said delay unit as the two-wire circuit in the vehicle automatic light system which involves at least two wiring connection including said at least one input terminal and said at least one output terminal and hence provides simple structure to the delay unit and hence easy installation the vehicle.
  • Fig.l is a schematic circuit diagram of the automatic light system (1) as per first embodiment of the present invention.
  • the automatic light system (1) for the vehicle comprises the permanent magnet generator (2) coupled with the vehicle engine for producing the A.C (alternating current), the vehicle battery (9) operatively connected to said permanent magnet generator (2) to be charged therefrom, the regulator and rectifier (RR) unit (3) operatively connected to said permanent magnet generator (2) and includes said at least at least one gate control circuit (13) and the shunt configuration of said at least two primary electronic switches (10), (11).
  • said at least one gate control circuit (13) is configured to regulate said alternating current on said at least two primary electronic switches (10) for supplying the output regulated and rectified voltage D.C power (14) and the output regulated voltage A.C power (15) to said at least one D.C load (7) and said at least one A.C load (5), (6) respectively.
  • the output regulated voltage A.C power (15) is supplied to said at least one A.C load including (5), (6) such as tail lamp (5) and the headlamp (6).
  • the headlamp (6) has a high beam filament (6a) and a low beam filament (6b).
  • said at least one A.C load (5), (6) includes said at least one lighting and signalling device (6) having an input connected to an output of said regulator and rectifier (RR) unit (3) for receiving said output regulated voltage A.C power (15).
  • said at least one lighting and signalling device (6) is the vehicle headlamp (6).
  • the fuse (8) protects the wiring harness against a short circuit condition of the vehicle battery (9) and the vehicle ignition switch (not shown) connects or disconnects battery (9) from said at least one D.C load (7).
  • said automatic light system (1) for the vehicle includes the delay unit (100) as said two-wire circuit installed therein for providing a delaying effect in supply of the output regulated voltage A.C power (15) to said at least one signalling andlightingdevice (6) such as the vehicle headlamp (6).
  • said delay unit (100) is electrically coupled between said permanent magnet generator (2) and the regulator and rectifier (RR) unit (3).
  • the delay unit (100) includes said at least one gate trigger circuit (107) and said at least one auxiliary electronic switch (102).
  • said delay unit (100) is the two-wire circuit comprising of said at least one input terminal (100a) and said at least one output terminal (100b).
  • said at least one auxiliary electronic switch (102) is electrically connected between said at least one input terminal (100a) and said at 1 — *— output terminal (100b) of the delay unit (100).
  • said delay unit (100) is being electrically coupled between the permanent magnet generator (2) and the regulator and rectifier (RR) unit (3) and thus providing the delay of said output regulated voltage A.C power (15) to said at least one A.C load (5), (6) including the headlamp (6) until the voltage amplitude of the permanent magnet generator (2) exceeds the predetermined value.
  • Fig.2 is a schematic circuit diagram of the automatic light system (1) illustrating as per second embodiment of the present invention.
  • the automatic light system (1) for the vehicle comprises the permanent magnet generator for producing the A.C (alternating current), the vehicle battery (9) operatively connected to said permanent magnet generator (2) to be charged therefrom, the regulator and rectifier (RR) unit (3) including said at least one gate control circuit (13) and the shunt configuration of at least two primary electronic switches (10), (11).
  • said at least one gate control circuit (13) of said regulator and rectifier (RR) unit (3) is configured to regulate said alternating current on said at least two primary electronic switches (10), (11) for supplying the output regulated and rectified voltage D.C power (14) and the output regulated voltage A.C power (15) to said at least one D.C load (7) and said at least one A.C load (5), (6) respectively.
  • the output regulated voltage A.C power (15) is supplied to said at least one A.C load including (5), (6) such as tail lamp (5) and the headlamp (6).
  • said at least one A.C load (5), (6) includes said at least one signalling andlightingdevice (6).
  • said at least one signalling and lighting device (6) is the vehicle headlamp (6).
  • the headlamp (6) has the high beam filament (6a) and the low beam filament (6b).
  • said automatic light system (1) for the vehicle further includes said at least one lighting and signalling device (6) including said vehicle headlamp (6) having the input connected to the output of said regulator and rectifier (RR) unit (3) for receiving said output regulated voltage A.C power (15).
  • the fuse (8) protects the wiring harness against the short circui*— ⁇ * ⁇ of the vehicle battery (9) and the vehicle ignition switch (not shown) connects or disconnects battery (9) from said at least one D.C load (7).
  • said automatic light system (1) for the vehicle includes the two- wire delay unit (100) installed therein for providing the delaying effect in supply of the output regulated A.C power (15) to the vehicle headlamp (6).
  • said delay unit (100) is electrically coupled between said output regulated voltage A.C power (15) of said regulator and rectifier (RR) unit (3) and said at least one A.C load (5), (6).
  • said at least one A.C load includes the tailamp (5) and the headlamp (6).
  • said delay unit is connected between said output regulated voltage A.C power (15) of said regulator and rectifier (RR) unit (3) and said at least one A.C load (5), (6).
  • the permanent magnet generator (2) is not loaded by the A.C (alternating current) line of the output regulated voltage A.C power (15) of the regulator and rectifier (RR) unit (3) comprising of the shunt configuration of said two Silicon Controlled rectifiers (SCRs) (10), (11) before engine starting as said the output regulated voltage A.C power (15) of the regulator and rectifier (RR) unit (3) is not high enough for shunting condition to start.
  • A.C alternating current
  • Fig.3 is a schematic circuit diagram of the delay unit (100) illustrating said at least one gate trigger circuit (107) including a first resistor R (101) of at least one current limiting resistor R (101), Rl (105), R2 (106) as per first and second embodiment of the present invention.
  • the delay unit (100) is the two- wire circuit including said at least one input terminal (100a) and said at least one output terminal (100b).
  • said delay unit (100) includes said at least one gate trigger circuit (107) and said at least one auxiliary electronic switch (102).
  • said at least one auxiliary electronic switch (102) is TRIAC TR (102).
  • said TRIAC TR (102) is electrically connected between said at least one input terminal (100a) and said at least one output terminal (100b) of the delay unit (100).
  • said at least one gate trigger circuit (107) is electrically coupled to said at least one auxiliary electronic switch (102).
  • said at least one gate trigger circuit (107) comprises said first resistor R (101) of said at least one current limiting resistor R (101), Rl (105), R2 (106) and a zener diode ZDl (103) and a second zener diode ZD2 (104) of at least one zener diode ZDl (103), ZD2 (104).
  • said TRIAC TR (102) allows current flow in both directions based on a gate trigger input of said at least one gate trigger circuit (107).
  • the TRIAC TR (102) receives the trigger signals through said at least one gate trigger circuit (107) comprising of the first resistor R (101) of said at least one current limiting resistor R (101), Rl (105), R2 (106) and the first zener diode ZDl (103) and the second zener diode ZD2 (104) of said at least one zener diode ZDl (103), ZD2 (104).
  • the ratings of the first resistor R (101), the first zener diode ZDl (103) and the second zener diode ZD2 (104) are selected as per the alternating voltage generated by the permanent magnet generator (2) for the required load condition and the engine predetermined speed beyond which the output regulated A.C power (15) generated by the regulator and rectifier (RR) unit (3) is supplied to said at least one A.C load (5), (6) including said vehicle headlamp (6).
  • the first zener diode ZDl (103) is forward biased and the second diode ZD2 (104) is reverse biased.
  • a gate trigger current flows through said at least one gate trigger circuit (107) including the first resistor R (101) and the first zener diode ZDl (103) and the second zener diode ZD2 (104), thus triggering said TRIAC TR (102) and hence allowing the TRIAC TR (102) to conduct.
  • the second zener diode ZD2 (104) is forward biased and the first zener diode ZDl (103) is reverse biased.
  • the gate trigger current flows through said at least one gate trigger circuit (107) including the first resistor R (101) and the first zener diode ZD1 (103) and the second zener diode ZD2 (104), thus triggering said TRIAC TR (102) and hence allowing the TRIAC TR (102) to conduct.
  • Fig. 4 is a schematic circuit diagram of the delay unit (100) illustrating said at least one gate trigger circuit (107) including the second resistor Rl (105) and the third resistor R2 (106) of said at least one current limiting resistor R
  • the delay unit (100) is the two-wire circuit including said at least one input terminal (100a) and said at least one output terminal (100b). Further, said delay unit (100) includes said at least one gate trigger circuit (107) and said at least one auxiliary electronic switch (102). As per first and second embodiment of the present invention, said at least one auxiliary electronic switch (102) is the TRIAC TR
  • said TRIAC TR (102) is electrically connected between said at least one input terminal (100a) and said at least one output terminal (100b) of the delay unit (100).
  • said at least one gate trigger circuit (107) is electrically coupled to said at least one auxiliary electronic switch (102).
  • said at least one gate trigger circuit (107) comprises the second resistor Rl (105), and the third resistor R2 (106) of said at least one current limiting resistor R (101), Rl (105), R2 (106) and the first zener diode ZD1 (103) and the second zener diode ZD2 (104) of at least one zener diode ZD1 (103), ZD2 (104).
  • the delay unit (100) includes said at least one auxiliary electronic switch (102) as the TRIAC TR (102) to control the output regulated A.C power supply (15) to said at least one A.C load (5), (6) including the vehicle headlamp (6).
  • said at least one gate trigger circuit (107) includes the second resistor Rl (105), and the third resistor R2 (106) of said at least one current limiting resistor R (101), Rl (105), R2 (106) and the first zener diode ZD1 (103) and the second zener diode ZD2 (104) of said at least one zener diode ZD1 (103), ZD2 (104).
  • the ratings for the second resistor Rl (105), and the third resistor R2 (106) of said at least one current limiting resistor R (101), Rl (105), R2 (106) and the first zener diode ZD1 (103) and the second zener diode ZD2 (104) of said at least one zener diode ZD1 (103), ZD2 (104) are selected as per the alternating voltage generated by the permanent magnet generator (2) for the required load condition and the engine predetermined speed beyond which the output regulated A.C power (15) generated by the regulator and rectifier (RR) unit (3) is supplied to said at least one A.C load (5), (6) including said vehicle headlamp (6).
  • the first zener diode ZD1 (103) is forward biased and the second diode ZD2 (104) is reverse biased.
  • the second zener diode ZD2 (104) is forward biased and the first zener diode ZD1 (103) is reverse biased.
  • the TRIAC TR (102) receives triggering current through the third resistor R2 (106) of said at least one current limiting resistor R (101), Rl (105), R2 (106) and the second diode ZD2 (104) of said at least one zener diode ZD1 (103), ZD2 (104) in positive half cycle and through the second resistor Rl (105) of said at least one current limiting resistor R (101), Rl (105), R2 (106) and the first zener diode ZD1 (103) of said at least one zener diode ZD1 (103), ZD2 (104) ZD1.
  • an arrangement of said at least one gate trigger circuit (107) including the second resistor Rl (105), the third resistor R2 (106), the first zener diode ZD1 (103) and the second zener diode ZD2 (104) in said delay unit (100) ensures that the TRIAC TR (102) receives the trigger current even when said at least one input terminal (100a) and said at least one output terminal (100b) of the delay unit (100) are swapped.
  • the present invention discloses the two-wire delay unit installed in the automatic light system for the vehicle and hence provides a simple, compact and cost-effective vehicle automatic light system.
  • the delaying effect provided by said delay unit controls the output regulated voltage A.C power delivered to said vehicle headlamp after the engine attains the predetermined speed and hence provide the improved engine startability and idling stability with better fuel economy for the vehicle. It is advantageous to provide the improved automatic light system that is adapted for normal operation when the vehicle engine is in operation, and the delay unit automatically turns ON the headlamp after the engine attains the pre-determined speed. Further, it is advantageous to install said delay unit as the two-wire circuit in the vehicle automatic light system which involves at least two wiring connection including said at least one input terminal and said at least one output terminal and hence provides simple structure to the delay unit and hence easy installation the vehicle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

La présente invention concerne un système de lumière automatique comprenant une unité de retard (100) qui est couplée électriquement à une unité de régulateur et de redresseur (RR) (3) permettant un retardement d'une puissance CA de tension régulée de sortie (15) de ladite unité de régulateur et de redresseur (RR) (3). Dans la présente invention, l'unité de retard (100) comprend au moins un circuit de déclenchement de grille (107) et au moins un commutateur électronique auxiliaire (102). En outre, ladite unité de retard (100) est un circuit à deux fils comprenant au moins une borne d'entrée (100a) et au moins une borne de sortie (100b).
PCT/IB2018/051798 2017-03-20 2018-03-19 Système de lumière automatique WO2018172899A1 (fr)

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IN201741009608 2017-03-20
IN201741009608 2017-03-20

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WO2018172899A1 true WO2018172899A1 (fr) 2018-09-27

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000313275A (ja) * 1999-04-28 2000-11-14 Misato Computer Insatsu Kk 車両用ライト点灯装置
US20130049585A1 (en) * 2011-08-31 2013-02-28 Tyngyuan WU Daytime running lame (drl) control system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000313275A (ja) * 1999-04-28 2000-11-14 Misato Computer Insatsu Kk 車両用ライト点灯装置
US20130049585A1 (en) * 2011-08-31 2013-02-28 Tyngyuan WU Daytime running lame (drl) control system

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