CN2228554Y

CN2228554Y - Engine electronic igniting and trouble emergency treating device

Info

Publication number: CN2228554Y
Application number: CN95212667U
Authority: CN
Inventors: 陈全仁
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-06-06
Filing date: 1995-06-06
Publication date: 1996-06-05
Anticipated expiration: 2005-06-06

Abstract

A shutting-down power-off protection circuit and an emergent ignition pulse signal source circuit are respectively connected between the input circuit of the ignition circuit of the engine of a common automobile and a power switch circuit through a manual selective switch. The shutting-down power-off protection circuit can lead the low-voltage loop circuit of an ignition coil to be automatically cut off when a power switch is switched on the engine stops working, and the platinum contact of a distributor is closed, or the sensor of a contactless distributor outputs a high level. The emergent ignition pulse signal source circuit can emit an emergent ignition pulse, can keep the engine running and can lead the automobile with a 'fault' to travel when a high-voltage ignition signal is discontinuous or is interrupted because of various faults, such as zero clearance of the platinum contact, the unclosed platinum contact, ablation of the platinum contact, the damage of the sensor of the contactless distributor, etc.

Description

Motronic control maps igniting and fault first aid device

The utility model belongs to the design field of automobile internal Motronic control maps firing circuit, relates to a kind of Motronic control maps igniting and fault first aid device.

Known automobile internal Motronic control maps firing circuit generally triggers formations such as firing pulse input circlult (to call input circlult in the following text) between sensor and the spark coil and power switch circuit by being serially connected in distributor.The major defect that prior art exists is: after power switch was connected, when engine misses and distributor platinum contact when being in the sensor output high level of closure or breakerless distributor, spark coil may be because of overheated the burning of switching on continuously; In addition, when firing circuit breaks down, not having faults such as gap, not closed, ablation or the damage of breakerless distributor sensor as distributor platinum contact causes high-voltage ignition signal interrupted or when interrupting, the driver just must keep in repair by stop off, both influenced work, very inconvenient again, also easily cause traffic congestion and security incident simultaneously.

The purpose of this utility model is to overcome the existing in prior technology deficiency, and then develops a kind of Motronic control maps with low cost, rational in infrastructure, easy to use igniting and fault first aid device, for the smooth safe driving of driver is provided convenience.

Technical solution of the present utility model is such: insert a parking power-off protecting circuit (to call vehicle-parking circuit in the following text) and a first aid igniting pulse signal source circuit (to call the first aid circuit in the following text) respectively by a manual selection switch between the input circlult of known automobile internal Motronic control maps firing circuit and power switch circuit.Vehicle-parking circuit can be power switch connection, engine misses occurring cuts off the spark coil low tension loop when distributor platinum contact is in closure or breakerless distributor sensor output high level situation automatically, thereby has prevented that spark coil from causing overheated burning because of switching on continuously; And when occur the platinum contact do not have the gap, not closed, ablate or when causing the interrupted or situation of interruption of high-voltage ignition signal because of faults such as breakerless distributor sensor damages, can send the first aid ignition pulse signal by the first aid circuit, to keep engine running, reach the purpose of band " fault " driving.

A specific embodiment of the present utility model by literary composition after accompanying drawing provide.

Fig. 1 is this embodiment's working principle (frame) figure.

Fig. 2 is this embodiment's a circuit connecting line figure.

As shown in the figure, Motronic control maps igniting described in the utility model and fault first aid device are by input circlult 2, vehicle-parking circuit 3, compositions such as first aid circuit 4 and power switch circuit 5, wherein input circlult 2 links with distributor triggering sensor 1, power switch circuit 5 is connected to the negative pole of spark coil DQ, 4 in vehicle-parking circuit 3 and first aid circuit are connected on respectively between input circlult 2 and the power switch circuit 5 by a manual selection switch K, its concrete connection is: the common port of K switch (a) is connected to vehicle-parking circuit 3, one end (b) of K switch is connected to the sensor of input circlult 2 or distributor platinum contact or breakerless distributor, and the other end of K switch (c) is connected to first aid circuit 4.In the implementation process, selector switch K can be a toggle switch, also can adopt and insert connection formula (plug connector) switch.Vehicle-parking circuit 3 comprises by resistance R ₁, R ₂, R ₃, capacitor C ₁, diode D ₁, D ₂, D ₃And transistor T ₁The monostable circuit of forming, wherein resistance R ₁And capacitor C ₁Constitute shunt circuit, they pass through D ₁Trigger sensor 1 through the a-b contact of K switch to distributor ring current is provided, and according to capacitor C ₁Discharge whether drive T ₁Conducting or end and then the working state of power controlling switching circuit 5.First aid circuit 4 comprises by resistance R ₃, R ₅, R ₆, R ₇, R ₈, capacitor C ₄, C ₅, transistor T ₂With the pulse oscillation circuit that LM556 time base circuit IC constitutes, positive source provides trigger signal through the a-c contact of K switch to 4 ends of IC, and gives T by 3 ends of IC ₂Base current is provided, makes T ₃Work, and then order about power switch circuit 5 work.Power switch circuit 5 is by diode D ₄, transistor T ₃And capacitor C ₃Deng composition, T wherein ₃Be high-power darlington transistors.In foregoing circuit, transistor T ₁And T ₂Be (Fig. 2) that is arranged in parallel, first aid circuit 4 and T ₂Connect, when proper functioning, T ₁Work, T ₂End; When vehicle failure first aid state, T ₂Work, T ₁End.

Be that example is narrated working principle of the present utility model so that the contact distributor to be arranged below.

One, normal working, a of K switch and b contacting, when distributor platinum make contact, resistance R ₁And capacitor C ₁By diode D ₁Provide the closed-loop path electric current to the platinum contact.C ₁In the time of discharge, give transistor T ₁The base stage trigger current is provided, has made T ₁Conducting.T ₁After the conducting, to transistor T ₃Triggering level is provided, makes T ₃Conducting.At this moment, spark coil low pressure forms the closed-loop path.When open distributor platinum contact, R ₁, C ₁The loop stops discharge, T ₁End T ₃End simultaneously, at this moment, the spark coil primary circuit is cut off, and the coil secondary induction goes out high-voltage ignition signal.In the circuit, diode D ₂To capacitor C ₁Provide discharge loop, to prevent C ₁Under pulse condition, influence T ₁Proper functioning; Diode D ₃Be protection T ₁And be provided with.

Two, after power switch is connected, when engine misses and during distributor platinum make contact, transistor T ₁Pass through resistance R ₂To capacitor C ₁Charging, circuit has constituted the monostable circuit form, and its duration of charge is mainly by R ₂And C ₁Decision.Work as C ₁Duration of charge is when surpassing monostable set time, i.e. T ₁When conducting has surpassed monostable duration of charge, C ₁Saturated, cause T ₁End T ₃Also, the low tension loop of spark coil is cut off, thereby can prevents that spark coil from causing overheated phenomenon of burning because of switching on continuously and taking place, spark coil has been played automatic protective action thereupon because of the triggerless level ends.

Three, when occur the platinum contact do not have the gap, not closed, ablate or cause input circlult 2 no pulse igniting trigger signal output because of faults such as breakerless distributor sensor damages so that high-voltage ignition signal is interrupted or the interruption situation after, can enable first aid circuit 4.At this moment, should pass through resistance R by positive source at first with a and the c contacting of selector switch K ₁, diode D ₁Provide trigger signal with the a-c contact of K switch to 4 ends (zero setting end) of LM556 time base circuit IC, make IC work, and pass through transistor T ₂To T ₃First aid igniting pulse triggering level is provided, makes T ₃Drive spark coil DQ work, send first aid igniting high-voltage pulse signal, keep engine running, realize the purpose of band " fault " driving.

Claims

1; a kind of Motronic control maps igniting and fault first aid device; it is characterized in that between the firing pulse input circlult (2) of automobile igniting circuit and power switch circuit (5), inserting a parking power-off protecting circuit (3) and a first aid igniting pulse signal source circuit (4) respectively by a manual selection switch K; concrete connection is: the common port a of K switch is connected to parking power-off protecting circuit (3); a selecting side b of K switch is connected to the sensor (1) of input circlult (2) or distributor platinum contact or breakerless distributor; another selecting side c of K switch is connected to first aid igniting pulse signal source circuit (4), the output terminal while of vehicle-parking circuit (3) and first aid circuit (4) and the input end UNICOM of power switch circuit (5).

2, electronic ignition as claimed in claim 1 and fault first aid device is characterized in that:

2.1 parking power-off protecting circuit (3) comprises by resistance R ₁, R ₂, R ₃, capacitor C ₁, diode D ₁, D ₂, D ₃And transistor T ₁The monostable circuit of forming, wherein R ₁And C ₁Formation shunt circuit in parallel, its split point and D ₁Positive terminal link D ₁Negative pole end and a contact of K switch link capacitor C ₁Discharge end through resistance R ₂With transistor T ₁The base stage trigger end join T ₁Power take-off and power switch circuit (5) in transistor T ₃The base stage trigger end link;

2.2 first aid igniting pulse signal source circuit (4) comprises by resistance R ₃, R ₅, R ₆, R ₇, capacitor C ₄, C ₅, C ₆, transistor T ₂With the pulse oscillation circuit that LM556 time base circuit IC constitutes, 4 ends of IC and the c contact of K switch link, 3 ends and the T of IC ₂The base stage trigger end join T ₂Power take-off and power switch circuit (5) in transistor T ₃The base stage trigger end link.

3, as claim 1,2 described electronic ignitions and fault first aid device, it is characterized in that transistor T ₁And T ₂For being arranged in parallel.

4, electronic ignition as claimed in claim 1 and fault first aid device is characterized in that selector switch K is a toggle switch.

5, electronic ignition as claimed in claim 1 and fault first aid device is characterized in that selector switch K is for inserting connection formula switch.