CN1157371A - Self-starting or stopping control circuit for engine of car - Google Patents

Abstract

A self-starting and self-stopping control circuit for automobile engine is formed from a group of circuits including at least a low-frequency oscillation timing circuit F1 whose high-level time is T1 and low-level time is T2, a firing pulse generating circuit F2 whose high-level time is T3 and low-level time is T4 and a firing control circuit F3 capable of determining working state of automobile engine. Said invented control circuit can completely simulate whole process of that using automobile machine key ignition switch to manually start and stop automobile at regular time.

Description

Self-starting or stopping control circuit for engine of car

The invention belongs to electronic technology application, the automobile electrical appliances field.

Need a kind of automatic controller that motor is controlled from start and stop, as engine start performance reliability trial, motor warming up etc.It is long slightly that north of china in winter cold, automobile are parked in the outdoor time, just is difficult for starting, and needs sometimes repeatedly to strike sparks, and trouble is caused delay; The baking of human naked light is arranged, very dangerous; Have no alternative but rent warm storehouse, bothersome expensive.Though the automobile that has is furnished with remote controller, but every a period of time with car remote control starting warming up, but park the distance slightly far just not all right, especially night more feel inconvenience; Recently, the someone invents installs radiator additional electric heating apparatus, and not time spent logical listing electric heating is had or not power limitations but park the place for a long time, and is just not all right as field work, uses also inconvenient.In sum, prior art fail to provide a kind of simply, flexibly, method easily, with the problem that solves cold day automobile starting difficulty.

Purpose of the present invention aims to provide a kind of self-starting or stopping control circuit for engine of car

At first be the circulation timing problems: can adopt mechanical timer or electronic timing, but consider long realization time-delay electronics easily, so determine to adopt electronic timing than machinery.

Next is to start to stop problem: the automobile start and stop, generally finish by human automobile mechanical key ignition switch; During startup, forward key operation to neutral position clockwise by stop position, to connect relevant circuit in the car, be rotated further the ignition location igniting again, continue for a moment, judge whether start success, unclamp its on positi in the middle of resetting to of key operation according to the sound of motor car engine; If start successfully, the motor continuous running, then no longer electricity is fiery; If unsuccessful, engine stoping operation then continues to light a fire until success after a while next time.When stopping, the clawback key gets final product to stop position.To realize above process with electronic circuit, then requiring this electronic circuit to confess connects and fire signal, and can whether start success according to automobile feedack decision, guarantee that finish each firing time and can effectively prevent to light a fire once more after automotive ignition from starting successfully.Difficult point is how to obtain the feedback information of automobile starting success or not, and through scrutinizing discovery, the mid point of automobile current generator can provide this feedback.

The working power of electronic circuit then can be taken from the storage battery of automobile.

The present invention is made up of following set of circuits:

At least comprise that a high level time is that T1, low level time are the low frequency oscillation time circuit F1 of T2;

At least also should protect and draw together a high level time is that T3, low level time are the firing pulse generation circuit F2 of T4;

At least also should comprise an ignition control circuit F3 that can judge the motor car engine working state;

Connection/stop signal the ST of a Control of Automobile engine starter of described low frequency oscillation time circuit F1 output; Described ignition control circuit F3 receives the feedback signal SN of the generator that motor car engine drives and sends ignition control signal to firing pulse generation circuit F2 according to SN; Described firing pulse generation circuit F2 receives from the control signal of F1 and F3 and comprehensive each control signal and is issued to one of automotive engine ignition system or more than one ignition pulse signal SP; Above-mentioned each circuit coordinates work, the phase relationship of the feedback signal SN of the connection/stop signal ST of formation, ignition pulse signal SP and generator is as follows.

An embodiment of the present invention is

A first order monostable circuit that constitutes by 555 o'clock base integrated package N1, resistance R 1 and R2, capacitor C 1, C2 and C3, its output high level time is T1=1.1R2C3; Above circuit forms low frequency oscillation time circuit F1

A second level monostable circuit that constitutes by 555 o'clock base integrated package N2, resistance R 3 and R4, capacitor C 4, C5 and C6, its output high level time is T2=1.1R4C6; Above circuit forms firing pulse generation circuit F2;

The output terminal of first order monostable circuit is connected to the trigger end of second level monostable circuit through C4, the output terminal of second level monostable circuit is connected to the trigger end of first order monostable circuit through C1, forming circulation triggers, formation one does not wait the low frequency oscillation time circuit in cycle, and this vibration time circuit is by switch S 2 starting of oscillations; By the output terminal control relay K1 of first order monostable circuit, exporting a high level time at the normally opened contact of K1 is that T1, low level time are T2, the connection/stop signal ST that arrives automotive engine starter.

The controlled cycle multivibrator circuit that do not wait that constitutes by 555 o'clock base integrated package N3, resistance R 5, R6 and R7, capacitor C 7 and C8 and diode D1, its output high level time is T3=0.695R5C7, low-level period is T4=0.695R6C7; Oscillator output control relay K2, exporting a high level time at the normally opened contact of K2 is that T3, low level time are T4, the fire signal SP that arrives automotive ignition system.

Collector electrode _ emitter of relay K 1 normally-closed contact and a triode Q is attempted by N3 and puts between " O " end and the power supply ground, by N3 control ignition signal SP; The base stage of Q is received the mid point of automobile current generator through the normally-closed contact of resistance R 8 and K2, receives generator feedback signal SN.Above circuit forms ignition control circuit F3;

AT dotted line functional block is made up of F1 heavy line functional block, F2 heavy line functional block and F3 heavy line functional block, represents automotive electronics automatic starting and stopping vehicle warmer self, and BUS dotted line functional block is represented automobile body.The representative of F1 heavy line functional block does not wait the low frequency oscillation time circuit in cycle, the firing pulse generation circuit of F2 heavy line functional block representative simulation human automobile mechanical key ignition switch start and stop automobile, and F3 heavy line functional block is represented ignition control circuit.PW is from the anodal power supply signal to F1 and F2 of car accumulator, GR is the ground signalling from car accumulator negative pole F1 and F2, the voltage that provides from the automobile current generator mid point feedback signal to F2 is provided SN, ST is the signal that starts or stops that F1 is issued to F2 and automobile starter, and SP is the fire signal that F2 is issued to automobile igniting circuit.

The waveform of each signal of electronics automatic starting and stopping vehicle warmer is referring to accompanying drawing 2, and its working procedure is as follows:

1. after power supply PW connected, time circuit F1 started working, and it sends high level timing signal ST, and be T1 this signal duration;

2. T1 is in the time, and F2 then sends high level fire signal SP, and the high level time of this signal is T3,

3. be both within the time of high level T3 at ST and SP, motor car engine begins ignition trigger, drives generator and sends high voltage feedback signal SN;

In time, the SN signal is kept apart by F3 at T3, does not participate in work, guarantees that fire signal SP high level time T3 finishes, and arranged enough firing time, and this is one of electronics automatic starting and stopping vehicle warmer key problem in technology, for sovereignty one of require;

4. firing time, T3 finished, if automobile starting success, then generator sends high voltage feedback signal SN and works through F3, the time is TN, suppress F2 and continue to send high level fire signal SP, guarantee no longer igniting after starter motor work, avoid damaging automotive ignition system

Firing time, T3 finished, if automobile starting is unsuccessful, then generator can not sent out high voltage feedback signal SN, do not restrain F2 and continue to send high level fire signal SP, F2 is guaranteeing that fire signal SP continues a low level time T4, after avoiding lasting startup to exhaust the storage battery electric energy, 2. the continuation process is finished until the T1 time;

5. after the T1 time finished, time circuit F1 sent low level timing signal ST, and the time is T2.In time, ST, SP and SN all become low level at T2, and automobile quits work;

6. the T2 time finishes, and it is T1 high level timing signal ST that time circuit F1 repeats to send the endurance again, and 1. the continuation process disconnects until power supply PW;

7. automobile is activated in the T1 time, and the operating time is TN, and the heat that utilizes fuel combustion to produce is warm warm with car; T2 is in the time, and automobile quits work and dispels the heat.Go round and begin again, automobile is maintained on certain temperature.

In sum, the basic point of electronics automatic starting and stopping vehicle warmer technological method is: the feedback signal of utilizing power supply that car accumulator provides and automobile current generator to provide, the applying electronic circuit, the anthropomorphic dummy uses the overall process of automobile mechanical key ignition switch start and stop automobile, regularly start and stop automobile fully.

Select different electronic devices for use, can derive multiple circuit from the schematic diagram of accompanying drawing 1,

Figure one is the present invention's electricity functional-block diagram

Figure two is signal phase figure of the present invention;

Figure three is an embodiment of the present invention circuit diagram;

In accompanying drawing 3, R1 to R8 is a resistance, and C1 to C8 is an electric capacity, and N1 to N3 is 555 time-base integrated circuits, and S1, S2 are switch, and K1, K2 are relay, and Q is a triode, and D1 is a diode.PW is a positive source, and GR is a power cathode, and the two is all from car accumulator, and S1 is a power switch.

Annexation between the element and signal trend are referring to accompanying drawing 3.

R1, R2, N1, C2 and C3 constitute first order monostable circuit in Fig. 3 upper half part, and its high level time is

T1=1.1R2C3; R3, R4, N2, C5 and C6 constitute second level monostable circuit, and its high electricity time is

T2=1.1R4C6; 3 pin of the output N1 that the first order is monostable are connected to 2 pin of the monostable trigger end N2 in the second level through C4,3 pin of the output N2 that the second level is monostable are connected to 2 pin of the monostable trigger end N1 of the first order through C1, their triggerings that circulates constitute a low frequency oscillation time circuit that does not wait the cycle jointly.The startup of this time circuit is controlled by trigger switch S2, and its output signal is 3 pin of N1 in the monostable output of the first order, and its high level time is T1, and low level time is T2, and the cycle is T1+T2, control relay K1.The normally opened contact of K1 outputs to the connection signal ST of automobile starter, and normally-closed contact is put N3 " O " end pin 4 ground connection.

R5, R6, R7, N3, C7, C8 and D1 constitute one together and are subjected to N3 to put the multi-vibrator that does not wait the cycle of " O " end pin 4 level control in Fig. 3 lower half portion, and when N3 put " O " end pin 4 for high level, the oscillator vibration was exported high level time and is

T3=0.695R5C7, low level time is

T4=0.695R6C7, be T3+T4 period of vibration; It is when hanging down high level that N3 puts " O " end pin 4, the oscillator nonoscillatory, and output is always low level.The output of this oscillator is at 3 pin of N3, control relay K2.The normally opened contact of K2 outputs to automotive ignition system fire signal SP, and normally-closed contact will be held pin 4 by put " O " that R8 and triode Q link N3 from the voltage feedback signal SN of automobile current generator

The working procedure of entire circuit is as follows:

1. the power turn-on switch S 1, clicks reset button S2, and Fig. 3 middle and upper part circuit is started working, and the output high level signal makes relay K 1 charged, and the endurance is T1;

2. the former normally opened contact closure of K1 is sent high level connection signal ST to automobile; Former normally closed point is opened, and disconnects N3 and puts 4 connections to ground of " O " end pin;

3. because of the original running of automobile, be low level signal from the feedback SN of automobile current generator, though be added to triode Q through K2 and R8, Q still ends, N3 puts " O " end pin 4 and becomes high level through R7 and start working, the output high level makes relay K 2 charged, and the endurance is T3;

4. K2 is closed former normal battle, sends high level fire signal SP to automobile; Former normally closed point is opened, and disconnects the connection of SN to triode Q;

5. at T3 in the time, automobile is connected by ST, is lighted a fire by SP and begins to start; T3 finishes, and the K2 dead electricity stops to send high level fire signal SP, simultaneously SN is added on the Q through R8.

If start successfully, SN uprises level makes the Q saturation conduction N3 be put " O " end pin 4 ground connection, and N3 no longer shakes, and K2 no longer sends out fire signal, finishes to forward to 6. up to the T1 time;

Get nowhere if start, automobile does not turn round, and SN still puts N3 " O " end pin 4 ground connection for low level can not make the Q saturation conduction, and N3 puts " O " end pin 4 and still is high level, and N3 is behind intermittent time T4, if less than the T1 end, then continue process 3.; Otherwise, continue next step;

6. the T1 time finishes, the K1 dead electricity; Make the ST step-down with parking of automobile on the one hand, on the one hand N3 is put " O " end pin 4 ground connection, make Fig. 3 bottom circuit reset;

7. ST raises after the step-down T2 time again, and F1 begins the new cycle, and the continuation process 2.;

8. as above process is gone round and begun again, up to turning on the power switch S1, and the electronics automatic starting and stopping vehicle warmer quits work.

Claims (2)

1. self-starting or stopping control circuit for engine of car, form by following set of circuits:

At least comprise that a high level time is that T1, low level time are the low frequency oscillation time circuit F1 of T2;

At least also should protect and draw together a high level time is that T3, low level time are the firing pulse generation circuit F2 of T4;

At least also should comprise an ignition control circuit F3 that can judge the motor car engine working state;

Connection/stop signal the ST of a Control of Automobile engine starter of described low frequency oscillation time circuit F1 output; Described ignition control circuit F3 receives the feedback signal SN of the generator that motor car engine drives and sends ignition control signal to firing pulse generation circuit F2 according to SN; Described firing pulse generation circuit F2 receives from the control signal of F1 and F3 and comprehensive each control signal and is issued to one of automotive engine ignition system or more than one ignition pulse signal SP; Above-mentioned each circuit coordinates work, the phase relationship of the feedback signal SN of the connection/stop signal ST of formation, ignition pulse signal SP and generator is as follows.

2. as claim 1 described self-starting or stopping control circuit for engine of car, it is characterized in that:

A first order monostable circuit that constitutes by 555 o'clock base integrated package N1, resistance R 1 and R2, capacitor C 1, C2 and C3, its output high level time is T1=1.1R2C3;

A second level monostable circuit that constitutes by 555 o'clock base integrated package N2, resistance R 3 and R4, capacitor C 4, C5 and C6, its output high level time is T2=1.1R4C6;

The output terminal of first order monostable circuit is connected to the trigger end of second level monostable circuit through C4, the output terminal of second level monostable circuit is connected to the trigger end of first order monostable circuit through C1, forming circulation triggers, formation one does not wait the low frequency oscillation time circuit in cycle, and this vibration time circuit is by switch S 2 starting of oscillations; By the output terminal control relay K1 of first order monostable circuit, exporting a high level time at the normally opened contact of K1 is that T1, low level time are T2, the connection/stop signal ST that arrives automotive engine starter.

The controlled cycle multivibrator circuit that do not wait that is made of 555 o'clock base integrated package N3, resistance R 5, R6 and R7, capacitor C 7 and C8 and diode D1, its output high level time is

T3=0.695R5C7, low-level period is

T4＝0.695R6C7；

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