CN2135103Y

CN2135103Y - Intelligent flash light for automotive vehicle

Info

Publication number: CN2135103Y
Application number: CN 92219683
Authority: CN
Inventors: 李杰峰
Original assignee: DAIDONG CHEMICAL PLANT ZOUPING TOWN ZOUPING COUNTY SHANDONG PROV
Current assignee: DAIDONG CHEMICAL PLANT ZOUPING TOWN ZOUPING COUNTY SHANDONG PROV
Priority date: 1992-08-27
Filing date: 1992-08-27
Publication date: 1993-06-02
Anticipated expiration: 2002-08-27

Abstract

The utility model provides a direction light flasher for motor vehicles, which has the function of short circuit protection and self-diagnosis. The utility model without a contact point adopts an NE555 integrated circuit and a BTS432 integrated circuit. The NE555 integrated circuit which is a time-base circuit generates control signals required by the flasher, and the BTS432 integrated circuit which is an intelligent power switch is used as an executive element to replace traditional relays which are provided with contact points. The contact points are eliminated, which increases the service life of the flasher. The BTS432 integrated package can be automatically switched off within 40 microseconds when a short circuit current is greater than 25A, and thus, when a direction light system of a motor vehicle has a short circuit, the flasher can conduct self protection and protect a switch of a direction light at the same time. A light emitting diode arranged on an outer housing of the flasher to display operating states is matched with a direction light on an instrument panel, so that fault diagnosis is very visual.

Description

Intelligent flash light for automotive vehicle

The utility model belongs to a kind of vehicular electrical appliance, is the improvement to automobile-use indicator flasher.

The flasher of motor vehicles does not all have short-circuit protection function now.And most of executive item is relay, and the contact is all arranged.In case in the turn signal system short circuit, when fuse did not also work because of certain surplus is arranged, big electric current burnt the contact or makes its local melting.Even there is not low problem of life-span in short-circuit contact yet.The contactless flasher of minority very easily will puncture as the power device of executive item when short circuit.In addition, because of the indicator switch produces high temperature by very big electric current, cause working of plastics softening and cascading failure that scrap also often has generation during short circuit.

The purpose of this utility model provides a kind of contactless, automobile-use flasher that short-circuit protection and autodiagnosis function are arranged, to improve the convenience of flasher service life and use, reduces the generation of the fault that causes because of the turn signal system short circuit.

The utility model is achieved in that its employing NE555 and two integrated circuit of BTS432.The former is a time base circuit, produces the required control signal of flasher, and the latter is a smart power switch, does executive item with it, replaces traditional relay.The light emitting diode demonstration of working is arranged on shell.

The utility model has been owing to eliminated the contact, thereby improved service life greatly, again since the BTS432 integrated package at short circuit current during greater than 25A, can be in 40 microseconds reliable turn-off automatically.In case so when the short circuit of automobile steering lamp system, flasher has the self-protection function, also the direction lamp switch is had protective effect simultaneously.This is easy to the lorry of the band trailer of short circuit for turn signal system, and meaning is particularly outstanding.The light emitting diode of the display working condition on the flasher shell cooperates with blinker on the instrument board, makes fault diagnosis very directly perceived.

Below in conjunction with accompanying drawing concrete structure of the present utility model and operation principle are described.

Accompanying drawing is an electrical schematic diagram of the present utility model.

As shown in drawings, the utility model mainly is made up of the executive item of time base circuit that adopts the NE555 integrated package and employing BTS432 integrated package, in time base circuit, 1 termination power negative pole of NE555 integrated package, 2,6 ends and resistance R 3, R4 and capacitor C 2 link to each other, 3 ends link to each other with 2 ends of executive item BTS432 integrated package, 4,8 ends link to each other with R2, and link to each other with positive source with motor vehicle electric lock K1 by resistance R 1,7 ends and resistance R 2, the positive pole of R4 and diode D1 links to each other, the negative pole of diode D1 links to each other with resistance R 3, capacitor C 1 one ends and resistance R 1, R2 links to each other, capacitor C 1, C2, another termination power cathode of C3.3 ends, 1 end of executive item BTS432 connect the power supply positive and negative electrode respectively, and 5 ends link to each other with the positive pole of indicator K switch 2, LED, dangerous alarm switch, and the negative pole of LED connects power cathode.

ZD among the figure represents indicator, and SD represents the blinker on the instrument board.

Operation principle of the present utility model is such: open electric lock K1, connect circuit, LED is bright because capacitor C 2 both end voltage VC2 can not suddenly change, this moment VC2=0,2,6 terminal voltages of NE555 are 0,3 end output high level, drive the BTS432 conducting.Supply voltage charges to C2 by resistance R 2, R4, R3 and diode D1 after resistance R 1, capacitor C 1 step-down filtering simultaneously.When C2 charged to 2/3VCC, C2 discharged by 7 ends of resistance R 4 to NE555, its 3 end output low level, and BTS432 ends.NE555 conducting again when C2 is discharged to 1/3VCC, output high level, BTS432 conducting.So go round and begin again.Diode D1 isolates charging and discharging circuit among the figure, can design dutycycle and frequency easily.Charging interval is pressed 0.693(R2+

) C2 calculating, press 0.693R4C2 discharge time and calculate, determine each resistance, capacitance with this.Optional frequency is about 1.4 hertz.

When the turn signal system short circuit, the automatic power-off protection of BTS432 integrated package in the flasher.At this moment, the relay indicating light LED of indicator ZD, flasher and the indicator lamp SD on the instrument board extinguish simultaneously.When operating personnel fixed a breakdown, will find out as long as K2 is seen whether flasher works after by the position of making the return trip empty: the relay indicating light of flasher was bright, and fault is at turn signal system; Do not work then is at flasher itself.

When whole flasher was not opened at K2, operating current was about 20mA, and power consumption is very little.

Entire circuit is contained on the little wiring board, and BTS432 integrated package radiation fin reinstalls in the shell.LED is contained on the shell.

Claims

Automobile-use intelligence flasher, mainly form by time base circuit and executive item, adopt the NE555 integrated package in the time base circuit, it is characterized in that, described executive item is a smart power switch BTS432 integrated package, 2 ends of BTS432 integrated package link to each other with 3 ends of NE555 integrated package, and its 3 end, 1 end link to each other with the power supply positive and negative electrode respectively, 5 ends and indicator K switch ₂, LED anodal and dangerous alarm switch link to each other, the negative pole of LED connects power cathode.