CN2674116Y

CN2674116Y - Protection means for engine

Info

Publication number: CN2674116Y
Application number: CN 200420032584
Authority: CN
Inventors: 曹泽兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-01-14
Filing date: 2004-01-14
Publication date: 2005-01-26
Anticipated expiration: 2014-01-14

Abstract

The utility model relates to a protection means for engine, which comprises an oil hypotonia protecting and delay power circuit and an overheat protecting circuit for the engine. The anode of the diode D1 is connected with the start signal ST, and the cathode of the diode D1 is connected with the base of the triode T1 and the anode of the capacitance C1 through resistance R3. The cathode of the capacitance C1 is connected with the cathode of the automobile body. The base of T1 is connected with the cathode of the automobile body through resistance R4; the emitter of T1 is connected with the base of T2; the collector of T2 is connected with the base of T3 and the feet 1 of the relay J3. The overheat protecting circuit for the engine is as that the overheat signal is connected with the base of T4 through R5; the collector of T4 is connected with the cathode of D3 through resistance R7; the anode of D3 is connected with the anode ON of the firing control circuit through R1; the emitter of T4 is connected with the feet 1 of the relay J2. The utility model can turn off the engine when the engine temperature is over high or the oil pressure is over low, so as to protect the engine.

Description

A kind of engine protector

Technical field the utility model relates to the auto extinguishing protector of a kind of internal-combustion engine protector, particularly automobile or engineering machinery electric-control motor.

Technical background is well-known, automobile or engineering machinery engine often occur because cooling system breaks down, cause engine temperature too high and damage, or, lubrication system causes the generation of faults such as engine scuffing owing to breaking down, mainly be because operating temperature and the engine oil pressure that present automobile or engineering machinery all can only be understood motor by the instrument in the driver's observation operator cabin, and the not ideal enough driver of causing of the degree of accuracy of instrument can not in time grasp the working condition of motor, in time takes appropriate measures; The patent No. is 01241158.2 to disclose a kind of car engine motor protector.

The summary of the invention the purpose of this utility model is to provide a kind of automobile simple in structure, with low cost, easy for installation or the engine protector of engineering machinery; it can be at engine temperature too high or engine oil pressure cross and make motor auto extinguishing immediately when low, play the effect of protection motor quickly and easily.

The utility model is realized by following proposal, engine protector comprises protection of engine motor oil hypotony and starting time-delay power circuit, the engine overheat protective circuit, it is characterized in that: described engine motor oil hypotony protection and starting time-delay power circuit are: the positive pole of diode D1 links to each other with activating signal ST, the negative pole of diode D1 links to each other with the base stage of triode T1 and the positive pole of capacitor C 1 through resistance R 3, the negative pole of capacitor C 1 links to each other with the vehicle body negative pole, the collector electrode of triode T1 links to each other with the vehicle body negative pole through resistance R 4, the emitter of triode T1 links to each other with the base stage of triode T2, the collector electrode of triode T2 links to each other with the base stage of triode T3 and 1 pin of relay J 3, the collector electrode of while triode T2,1 pin of the base stage of triode T3 and relay J 3 links to each other with the anodal ON of ignition control circuit through resistance R 1, the emitter of triode T2 links to each other with the collector electrode of triode T3, the emitter of triode T3 links to each other with 1 pin of relay J 1,2 pin of relay J 1 link to each other with the vehicle body negative pole, 3 pin of relay J 1 link to each other with the negative pole of diode D2, the positive pole of diode D2 links to each other with no fuel injection pressure signal through

resistance R

2,3 of relay J 1,4 pin are break contact, 5 pin of relay J 1 are empty pin, 4 pin of relay J 1 link to each other with 2 pin of

relay J

3,3 of relay J 3,4 pin are break contact, 5 pin of relay J 3 are empty pin, 3 pin of relay J 3 link to each other with the anodal ON of ignition control circuit, and 4 pin of relay J 3 link to each other with the anodal B of engine ignition device;

Described engine overheat protective circuit is: heat alarm links to each other through the base stage of resistance R 5 with triode T4; the collector electrode of triode T4 links to each other through the negative pole of resistance R 7 with diode D3; the positive pole of diode D3 links to each other with the anodal ON of ignition control circuit through resistance R 1; the emitter of triode T4 links to each other with 1 pin of relay J 2; 2 pin of relay J 2 link to each other through the negative pole of resistance R 6 with diode D3; 3 pin of relay J 2 link to each other with the vehicle body negative pole simultaneously; 3 pin of relay J 2 and 4 pin of relay J 2 are break contact; 4 pin of relay J 2 are empty pin; 5 pin of relay J 2 link to each other with the positive pole of diode D4, and the negative pole of diode D4 links to each other with 2 pin of relay J 3.

The utlity model has the automobile simple in structure, with low cost, easy for installation or the engine protector of engineering machinery; it can be at engine temperature too high or engine oil pressure cross and make motor auto extinguishing immediately when low; play the effect of protection motor quickly and easily; avoid the damage of motor, prolong the working life of motor.

Description of drawings Fig. 1 the utility model engine protector circuit structure diagram

Protection of Fig. 2 the utility model engine motor oil hypotony and starting time-delay power circuit diagram

Fig. 3 the utility model engine overheat protective circuit figure

TEMPSW---the too high signal of engine temperature

B---engine ignition device positive pole

The positive pole of ON---ignition control circuit

OILSW---no fuel injection pressure signal

ST---activating signal

Embodiment describes in detail the utility model below in conjunction with accompanying drawing:

As accompanying drawing 1, shown in 2, when engine start, activating signal ST arrives the positive pole of capacitor C 1 and the base stage of triode T1 through diode D1 and resistance R 3, give capacitor C 1 charging, the emitter of triode T1 is to signal of base stage emission of triode T2 simultaneously, signal is delivered to the collector electrode of triode T3 again after triode T2 handles, signal passes to 1 pin of relay J 1 after triode T3 handles once more, at this moment, relay J 1 work makes 3 of relay J 1,4 pin disconnect, and make the relay J 3 must not, because 3 of relay J 3,4 pin are closed under normal conditions, cross normal startup when low so guaranteed motor at engine oil pressure, after engine start, unclamp switch starter, when cutting off activating signal ST, because capacitor C 1 is recharged during starting, capacitor C 1 discharge this moment continues to keep to relay J 1 power supply about 15 seconds, played the effect to relay J 1 time-delay power supply, engine oil pressure is unstable and cause the problem of engine misses when having avoided motor just to start.

Behind the motor normal starting, engine oil pressure is in just often, this moment capacitor C 1 discharge off, relay J 1 outage makes 3,4 pin of relay J 1 recover closed state.

When motor in running; because when a variety of causes makes engine oil pressure be lower than normal value; engine oil pressure signal OILSW will arrive relay J 1 by diode D2 through resistance R 2 this moment; because 3,4 pin of relay J 1 are in closed state; so engine oil pressure signal OILSW is passed to 2 pin of relay J 3; make relay J 3 work; 3,4 pin of relay J 3 disconnect; moment is promptly cut off the firing circuit of motor; make the motor auto extinguishing, guarantee that motor is on the low side or be protected when not having oil pressure at engine oil pressure.

As accompanying drawing 1; shown in 3; when motor engine temperature occurs when too high in the normal operation process; at this moment; the too high signal TEMPSW of engine temperature passes to triode T4 through resistance R 5; signal passes to 2 pin of relay J 2 after triode T4 handles; make relay J 2 work; make 3 of relay J 2 this moment; 4 pin disconnect; 3; 5 pin closures; because 3 pin of relay J 2 are to link to each other with the vehicle body negative pole; 1 pin of relay J 3 links to each other with the anodal ON of the working power ignition control circuit of motor; so relay J 3 work, 3 of relay J 3; 4 pin disconnect, and have promptly cut off the firing circuit of motor; make the motor auto extinguishing, guarantee that motor is protected when temperature is too high.

Stable for the work of guaranteeing relay J 2 can add capacitor C 2 and resistance R 8 in described engine overheat protective circuit, the positive pole of capacitor C 2 links to each other with the negative pole of diode D3, and the negative pole of capacitor C 2 links to each other with 3 pin of relay J 2 through resistance R 8.

Claims

1, a kind of engine protector, comprise protection of engine motor oil hypotony and starting time-delay power circuit, the engine overheat protective circuit, it is characterized in that: described engine motor oil hypotony protection and starting time-delay power circuit are: the positive pole of diode D1 links to each other with activating signal ST, the negative pole of diode D1 links to each other with the base stage of triode T1 and the positive pole of capacitor C 1 through resistance R 3, the negative pole of capacitor C 1 links to each other with the vehicle body negative pole, the collector electrode of triode T1 links to each other with the vehicle body negative pole through resistance R 4, the emitter of triode T1 links to each other with the base stage of triode T2, the collector electrode of triode T2 links to each other with the base stage of triode T3 and 1 pin of relay J 3, the collector electrode of while triode T2,1 pin of the base stage of triode T3 and relay J 3 links to each other with the anodal ON of ignition control circuit through resistance R 1, the emitter of triode T2 links to each other with the collector electrode of triode T3, the emitter of triode T3 links to each other with 1 pin of relay J 1,2 pin of relay J 1 link to each other with the vehicle body negative pole, 3 pin of relay J 1 link to each other with the negative pole of diode D2, the positive pole of diode D2 links to each other with no fuel injection pressure signal through resistance R 2,3 of relay J 1,4 pin are break contact, 5 pin of relay J 1 are empty pin, 4 pin of relay J 1 link to each other with 2 pin of relay J 3,3 of relay J 3,4 pin are break contact, 5 pin of relay J 3 are empty pin, 3 pin of relay J 3 link to each other with the anodal ON of ignition control circuit, and 4 pin of relay J 3 link to each other with the anodal B of engine ignition device;

2, engine protector as claimed in claim 1; it is characterized in that: in described engine overheat protective circuit, also be added with capacitor C 2 and resistance R 8; the positive pole of capacitor C 2 links to each other with the negative pole of diode D3, and the negative pole of capacitor C 2 links to each other with 3 pin of relay J 2 through resistance R 8.