CN2259491Y - Protector of engine for vehicle - Google Patents

Abstract

The utility model relates to a protector of an engine for a vehicle, which can automatically cut an ignition circuit when the oil pressure of the engine is over-lower, ensuring that the engine can not be burned. The protector comprises a triggering unit and a cutting unit for the ignition coil, wherein, an input end of the triggering unit can be connected with an oil pressure sensor, and an output end thereof is can control the cutting unit for the ignition coil through a delay unit. The utility model also has an automatic alarm function, the utility model is suitable for vehicles with multiple types which can use petrol as the fuel; the utility model has the advantages of simple structure, small size, reliable work, stability, etc.

Description

A kind of car engine motor protector

The utility model relates to the safety installations of a kind of automotive engine lubrication system, particularly a kind of safety installations that has influence on engine igniting system when lubricating oil pressure is not enough.

In the automobile running way because the engine lubrication system engine oil pressure is lower than technical requirement under the travelling state, causing motor to burn out fault happens occasionally, index that the driver of particularly new training requires vehicle motor lubrication system engine oil pressure and effect be not fully aware of not to have the steering vehicle experience again, makes that engine oil pressure is low to cause motor obviously to be increased by burnout phenomenon.The particularly load-carrying vehicle of multiple vehicle that existing China produces mainly adopts oil pressure gauge to engine lubrication system engine oil pressure surveillance style.It is formed by being contained in the oil pressure gauge on the instrument panel and being contained on the motor sensor two-part in the main oil gallery or on the strainer.The vehicle that also had has in recent years increased machine oil low pressure alarming red led device, perhaps adopt machine oil low pressure red led warning device separately, as First Automobile Works production liberation CA1091 series cargo vehicle, No. 2 Automobile Factory produces east wind EQ1092 series cargo vehicle, northern spring board CN6590 light bus and the miniature series automobiles of Chang'an board.Aforesaid way proposes higher responsibility requirement to the driver, need to be grasped the needed engine lubrication system engine oil pressure of travel condition of vehicle technical order and adhere to that driving is preceding to the oil level inspection, more outstanding is in the driving way, need the driver note often bayonet gauge engine oil pressure what or red machine oil warning light bright do not have bright, yet in actual conditions, driver's steering vehicle attention mainly concentrate on the road surface and the vehicle driving of dealing on, it is not enough to be easy to occur bayonet gauge indication engine oil pressure, but the driver fails in time to find the phenomenon that causes motor car engine to be burnt out.

The purpose of this utility model, just being to provide a kind of can cross when hanging down by engine oil pressure in the automobile running way, cuts off the engine ignition circuit automatically, guarantees the protective gear that motor is not burnt out.

For achieving the above object; the utility model adopts following structural design; it is made up of trigger element, engine igniting coil cutting unit; the meet sb. at the airport output terminal of oil pressure sensor of the input end of trigger element; the break-make of trigger element control ignition coil cutting unit; two output nodes of spark coil cutting unit by protector are serially connected in the low-voltage circuit between distributor and the spark coil; or be serially connected on the switching tube base circuit of control ignition electric current in the electronic ignition device, the power input of protector connects automobile ignition switch.

Because the protector that the utility model provides can monitor the engine lubrication system engine oil pressure in the vehicle driving process all the time; when the engine lubrication system engine oil pressure drops to when needing parking checking and need replenishing machine oil, protector can be connected the automobile loud-speaker automatically and ring or make machine oil low pressure alarming lamp glittering.If engine oil pressure continues to descend; will constitute in the time of to stop to the harm of motor; protector will cut off ignition circuit automatically; force motor to quit work; thereby stopped because the phenomenon that the carelessness of driver causes motor to be burnt out also further perfect motor autoprotection performance.The utility model can be according to different vehicles, adjust Inter parameter, to adapt to different requirements to engine oil pressure, have simultaneously simple in structure, volume is little, reliable operation, advantage such as stable.

Fig. 1 is an external circuit skeleton diagram of the present utility model

Fig. 2 is the protector circuit theory diagrams of Fig. 1

Fig. 3 is another embodiment's external circuit skeleton diagram

Fig. 4 is the circuit theory diagrams of Fig. 3 protector

Fig. 5, Fig. 6 are respectively Fig. 2 relay J 4, J1 contact connection diagram

Fig. 7 is Fig. 4 relay J 1 contact connection diagram

Below in conjunction with accompanying drawing the utility model is described in further detail.

One of them embodiment of the present utility model draws for external 6 lines, mark No. 1 to No. 6 (Fig. 1), wherein No. 1 and No. 2 lead-in wire is serially connected in the automotive ignition system on the spark coil and distributor low-voltage circuit, if electronic ignition device can be serially connected on the switching tube base circuit of control ignition electric current, No. 3 lines are connected on the contact of the manual electric loud-speaker of steering wheel the control loud-speaker and ring, No. 4 lead-in wire is connected on the negative terminal of bayonet gauge as the engine oil pressure signal input line, No. 5 lead contact fire switch is made power line, and No. 6 lead-in wire connects car body as ground wire.Protector inside (Fig. 2) is provided with 10 seconds unit of time-delay; alarm unit and trigger element; integrated package GD4001B (1) in the circuit; triode T1T2; capacitor C 1; resistance R 1 to R6R27 is formed 10 seconds unit of time-delay; time parameter is decided by R1 (1M Ω) and capacitor C 1 (10 μ F/50V); automobile ignition switch makes No. 5 lead-in wires obtain the 12V supply voltage when turning to the igniting enable position by off position; because C1 electric capacity two ends do not have voltage; make 8 pin among the GD4001B (1); 9 pin; 12 pin; 13 pin are low level zero volt; 10 pin; 11 pin are output as high level (11.4 volts) and control 1 pin; 2 pin; 5 pin; 6 pin are that high level (11.4 volts) makes 3 pin; 4 pin are by R3 output low level zero volt; T1 ends; the T2 conducting; the adhesive of J2 relay; J2 relay normally-closed contact is disconnected; guarantee when the initial engine oil pressure of automobile starting is low; make the J1 relay can not adhesive; its J1 relay normally-closed contact closure is connected the igniting low-voltage circuit, and normal startup of automobile travelled.Because No. 5 lead-in wire is supplied with 12 volts of power supplys all the time, charge to C1 by R1, the C1 both end voltage is constantly raise, through 8 pin, 9 pin, 12 pin, 13 pin voltages being reached in about 10 seconds or during greater than 5.1 volts, making 10 pin and 11 pin is zero by the R2 output voltage, 1 pin, 2 pin, 5 pin, 6 pin are low voltage zero volt, 3 pin, 4 pin output terminals are high voltage (11.4 volts), through R5 T1 conducting T2 are ended, and the J2 relay discharges, its J2 normally-closed contact closure is for the adhesive of J1 relay provides condition.By experiment, delay time and be fit to for the normal startup of vehicle and the starting technical requirements of travelling for 10 seconds.Can know from the working principle of oil pressure sensor, when the engine lubrication system engine oil pressure is high more, contacting of machine oil sensor spring sheet and bimetallic strip is frequent more, signal voltage umber of pulse by the machine oil sensor increases, the average current of bayonet gauge increases, the bayonet gauge both end voltage increases reduces bayonet gauge negative terminal voltage-to-ground, otherwise the engine lubrication system engine oil pressure reduces, signal voltage pulse number by the machine oil sensor reduces, the average current of bayonet gauge reduces, the bayonet gauge both end voltage reduces, and bayonet gauge negative terminal signal voltage over the ground increases.

Under engine lubrication system engine oil pressure normal state, form the d. c. voltage signal that filter network converts to from the pulse voltage signal that No. 4 lead ends of Fig. 1 are imported through Fig. 2 capacitor C 2C4, be added in the input end of trigger element and alarm unit, and the engine oil pressure normal value of these two circuits parameter decision by input pickup resistance R8R9R12 and R22R25R26 is set respectively.Be added in 1 pin of GD4001B (2) by the signal voltage of 4 ends input, 2 pin, 5 pin, 6 pin, 8 pin, 9 pin, 12 pin, 13 pin, 5 pin of GD4001B (3), signal voltage on 6 pin does not reach 5.1 volts, make 3 pin of GD4001B (2), 4 pin output HIGH voltages (11.4 volts), make the T3 conducting by R11, T4 ends, the J3 relay discharges, and the J3 normally opened contact disconnects, and the J1 relay discharges, J1 normally-closed contact closure, automotive ignition circuit proper functioning, the signal voltage of being imported by 4 ends is added in 5 pin of GD4001B (3) equally, 6 pin are lower than 5.1 volts, make 11.4 volts of 4 pin output HIGH voltages, make the T5 conducting by R21, T6 ends, and the J4 relay discharges, and the J4 normally opened contact disconnects, 3 ends lead-in wire disconnects over the ground, alarm unit is not worked, and electric automobile horn does not ring, and reflection engine lubrication system engine oil pressure is normal.

If the engine lubrication system engine oil pressure reduces, engine oil pressure technical requirements according to vehicle, when needing parking checking and replenishing machine oil, 4 ends by Fig. 1 are from the engine oil pressure signal voltage of bayonet gauge input, the signal voltage that is added on GD4001B (2) 1 pin, 2 pin, 5 pin, 6 pin, 8 pin, 9 pin, 12 pin, 13 pin still is lower than 5.1 volts, the J3 relay still discharges, and the J1 relay discharges, automotive ignition circuit proper functioning.And the engine oil pressure signal voltage that 4 ends that pass through Fig. 1 are imported from the bayonet gauge negative terminal, be added in GD4001B (3) 5 pin, signal voltage on 6 pin is more than or equal to 5.1 volts, make 4 pin by R16 output low potential zero volt, T5 ends, T6 conducting, the adhesive of J4 relay, J4 normally opened contact closure, make the loudspeaker wiring by 3 ends lead-in wire shorted to earth, car horn is rung, because 4 pin of GD4001B (3) output low potential zero volt, 8 pin, 9 pin input, zero volt, 11.4 volts of 10 pin output high petentials give capacitor C 3 chargings by R17, about 5 seconds of duration of charge, time parameter is by R17 and C3 decision, make GD4001B (3) 12 pin, 13 pin input voltages reach 5.1 volts, and 11 pin are by R19 output low potential zero volt, 1 pin, 2 pin input low potential, zero volt, 11.4 volts of 3 pin output high petentials, make the T5 conducting by R20, T6 ends, and the J4 relay discharges, the J4 normally opened contact disconnects, electric automobile horn disconnects over the ground by 3 ends of Fig. 1, and loudspeaker are rung and stopped, and plays the effect to driver's sound alarm.

After if alarming horn was rung 5 seconds, because of certain reason is failed parking checking and additional machine oil, make the engine lubrication system engine oil pressure continue to reduce, when the engine oil pressure technical requirements that is reduced to according to vehicle, will work the mischief to stop the time to motor at once, be added in Fig. 2 trigger element input end 4 by 4 ends of Fig. 1 from the engine oil pressure signal voltage of bayonet gauge negative terminal input and make GD4001B (2) 5 pin, 6 pin, 8 pin, 9 pin, 12 pin, signal voltage on 13 pin reaches or greater than 5.1 volts, make 3 pin by R10,4 pin, 10 pin, 11 pin output low potential, zero volt, T3 ends, the T4 conducting, the adhesive of J3 relay, J3 normally opened contact closure, by the J2 normally-closed contact, make the adhesive of J1 relay, the J1 normally-closed contact disconnects, disconnected between spark coil and the distributor low pressure No. 1, No. 2 lead wire circuit, motor is quit work, thereby having reached the engine lubrication system engine oil pressure reduces, under the situation of necessary parking checking, can cut off the engine ignition circuit automatically, the possibility of having avoided motor to be burnt out.After motor quits work, give the power supply of 5 ends by storage battery by Fig. 1 ignition switch, make Fig. 2 relay J 3 continue adhesive, when having only the driver that automobile ignition switch is disconnected, the J3 relay could discharge, and Fig. 2 circuit restPoses.

The vehicle of some manufacturer production monitors the engine lubrication system engine oil pressure and only adopts Oil pressure switch controller oil pressure tutorial light, in travelling on the way, when tutorial light is bright, require necessary parking checking, adopt this mode exactly as northern spring board CN6590 light bus, point out in its specification:, just represent that oil pressure is low excessively if the engine oil pressure tutorial light is bright in vehicle driving, shutting theengine down is checked oil level and lubrication system in the fuel tank immediately.The state of being sure not to light at tutorial light continues driving.

Similar requirement according to this class vehicle, another embodiment of the present utility model is external 5 lead-in wires (Fig. 3), No. 1 to 5, mark, wherein No. 1 and No. 2 lead-in wires are serially connected on spark coil and the distributor low-voltage circuit, if electronic ignition device can be serially connected on the base circuit of control ignition current switch pipe, the negative terminal that No. 3 lead-in wires are connected on the bayonet gauge tutorial light is as engine oil pressure state signal voltage input line, and No. 4 lead contact fire switches are as the positive source input line, and No. 5 lead-in wire connects car body as ground wire.Fig. 4 protector inside is provided with 10 seconds unit of time-delay and trigger element, integrated package GD4001B (1) and triode T1T2, capacitor C 1, resistance R 1 to R7, voltage-stabiliser tube W2,10 seconds delay units of relay J 2 compositions in the circuit.Integrated package GD4001B (2) and triode T3T4 in the circuit, resistance R 9 is to R15, voltage-stabiliser tube W3, relay J 3 is formed trigger element, when automobile normally starts, automobile ignition switch is beaten when the starting position is connected in igniting, make the 4 end input voltages of Fig. 3, capacitor C 1 original state does not have voltage among Fig. 4, make 8 pin of GD4001B (1), 9 pin, 12 pin, 13 pin are in low potential zero volt, 10 pin, 11.4 volts of 11 pin output high petentials, 1 pin, 2 pin, 5 pin, 6 pin are high petential (11.4 volts), 3 pin, 4 pin are by R4 output low potential zero volt, T1 is ended, the T2 conducting, the adhesive of J2 relay, the J2 normally-closed contact disconnects, the J1 relay is discharged, the J1 normally-closed contact is connected the igniting low-voltage circuit, automobile is normally started, constantly charge by R1 from 4 end power supplys to C1, its voltage is constantly raise, duration of charge is by R1 and C1 decision, through about 10 second the C1 both end voltage be added in 8 pin, 9 pin, 12 pin, 13 pin reach or during greater than 5.1 volts, 10 pin, 11 pin are by R3 output low potential zero volt, 1 pin, 2 pin, 5 pin, 6 pin input low voltage, zero volt, 3 pin, 4 pin output HIGH voltages (11.4 volts) make the T1 conducting by R5, T2 ends, the J2 relay discharges, and J2 normally-closed contact closure is for the adhesive of J1 relay provides condition.Automobile is when cold start-up like this, though the closed engine oil pressure tutorial light of Oil pressure switch is bright, still guaranteed the automobile normal starting, and Oil pressure switch disconnects all the time in the automobile running and normally descend at engine oil pressure.From the 3 end input unit oil pressure state signal voltages of Fig. 3 is high petential (12 volts), be added among Fig. 43 end trigger element line inputs by R9R10 in GD4001B (2) voltage on 8 pin, 9 pin, 12 pin, 13 pin greater than 5.1 volts, 10 pin, 11 pin are by R11 output low potential zero volt, 1 pin, 2 pin, 5 pin, 6 pin input low potential, zero volt, 11.4 volts of 3 pin, 4 pin output high petentials, make the T3 conducting by R13, T4 ends, the J3 relay discharges, the J3 normally opened contact disconnects, the J1 relay is discharged, and the J1 normally-closed contact disconnects, the ignition circuit proper functioning.Low excessively in the vehicle driving as if engine oil pressure; the Oil pressure switch closure; red engine oil pressure tutorial light is bright; 3 ends pass through the oil pressure switch shorted to earth among Fig. 3 simultaneously; be added in 3 ends among Fig. 4; make 8 pin among the GD4001B (2) by R9R10; 9 pin; 12 pin; 13 pin input voltages are lower than 5.1 volts; 10 pin; 11.4 volts of 11 pin output high petentials; 1 pin; 2 pin; 5 pin; 11.4 volts of 6 pin input high petentials, 3 pin; 4 pin are by R12 output low potential zero volt, and T3 ends; the T4 conducting; the adhesive of J3 relay, J3 normally opened contact closure makes the adhesive of J1 relay by the J2 normally-closed contact; the J1 normally-closed contact disconnects; disconnect high-tension coil to the low tension ignition circuit between the distributor, motor is quit work, played the effect that the protection motor is not burnt out.

More than trigger element and delay circuit among two embodiments all can adopt known trigger circuit and delayer.

The foregoing circuit working state is to consider that automotive power supply is 12 volts of states that had, and changes at the actual conditions supply voltage, and in any case, the logical relation of circuit is the same with effect.Fig. 2 circuit switching electrical equipment J1 to J4, Fig. 4 circuit switching electrical equipment J1 to J3 select 12 volts of relays of direct current at first, by the reality test, ceiling voltage is 13.8 volts, 9.6 volts of minimum voltages, obviously select 12 volts of DC relay to be not suitable for, (before car engine, battery tension is 12.7 volts, when ignition switch is opened, the motor slow start, when generator is not worked, 9.6 volts of the 5 end voltage-to-grounds of Fig. 1,14 volts of automobile running generator powered voltages.) for the device that guarantees to provide can both proper functioning under 9.6 volts to 14 volts voltage range states of the 5 ends input of Fig. 1, in Fig. 2 circuit, adopt the relay of 9 volts of models of direct current, and resistance R 6R7R14R24 (25 Ω 0.5W) is set, voltage-stabiliser tube W1 to W4, the voltage stabilizing value is 10.9 volts to 11.1 volts scopes (maximum electric current of voltage regulation 90mA), when 14 volts of generator output voltages, the voltage-stabiliser tube conducting, the voltage at guard relay two ends is the highest to be no more than 11.1 volts, and the ceiling voltage that the given parameter of relay can be born for a long time is the 9+9*30%=11.7 volt, meet relay technical requirements scope, electric current resistance R 6 in Fig. 2 of passing through by relay and voltage-stabiliser tube, R7, R14 or R24, resistance R 7 in Fig. 4, R8 or R15 go up maximum and can produce 3.5 volts voltage drop and guarantee the relay reliably working.When the voltage from 5 ends inputs is 9.6 volts of low voltages, voltage-stabiliser tube is not worked, the given operating current of relay is 50mA, resistance by R6 or R7R14R24 produces 1.25 volts of voltage drops, the relay two ends also have nearly 8.35 volts voltage, and the given minimum steady fixed working voltage of relay is the 9-9*10%=8.1 volt, has guaranteed the relay reliably working, all can work reliably to the scope of 14 volts of supply voltages at 9.6 volts thereby the device that is provided has been provided.

Lamp was bright when the 4th page in liberation CA1091 series fleetman handbook (First Automobile Works) pointed out that about the oil pressure warning light engine motor oil pressure is reduced to 70 ± 20KPa.If lamp is bright, necessary parking checking can travel after fixing a breakdown in the driving.Point out about a pressure gauge for the 6th page, under steam, if engine oil pressure should remain on travel in 150～600KPa scope in engine oil pressure when being lower than 150KPa, then answer parking checking, with the burnout-proof part.

According to liberation CA1091 series cargo vehicle engine oil pressure index, the device that provides can be provided, the low warning index parameter of engine oil pressure is 150KPa, think that in addition reporting to the police is to ask the driver to note, simultaneously also should give the certain loose condition of driver, enable, machine oil low pressure alarming parameter is decided to be 180～200KPa want more suitable in better suited chance inspection and handling problem, and engine oil pressure is descended and must stop, the engine oil pressure parameter that needs to cut off ignition circuit automatically is decided to be 100KPa.Being determined by experiment the resistance parameter R8 that triggers in the control wiring according to this index is 5.1K Ω, R9 is 2K Ω, R12 is 3.3K Ω, and 5 seconds time control circuit R22 are 3K Ω, R25 is 5.1K Ω, R26 is 2.2K Ω, and other vehicle can be adjusted resistance parameter by experiment according to running state oil pressure index.

According to the device that provides, adopt reduction as far as possible to use power consumption from the guiding theory of line design, and device selects to select high-power components as far as possible, the one, the heating value of minimizing element, make it in epoxy resin proper functioning under the unfavorable situation of radiating condition, it is big that the while high power valve bears power, pipe working life and reliability have been increased, it is releasing state that the working state of relay adopts the engine oil pressure normal state, not only reduced power consumption, simultaneously also for just in case device break down, can not regular event, and should not bring any adverse influence to the cruising and the safety of automobile.J1 relay normally-closed contact two ends and connect capacitor C 4, C7 and play the effect of protective relay contact among Fig. 2, Fig. 4.

Claims (5)

1. automobile machine engine protector; it is characterized in that it is made up of trigger element, engine igniting coil cutting unit; the meet sb. at the airport output terminal of oil pressure sensor of the input end of trigger element (4); the break-make of trigger element control ignition coil cutting unit; output node (1), (2) of spark coil cutting unit by protector are serially connected in the low-voltage circuit between distributor and the spark coil; or be serially connected on the switching tube base circuit of control ignition electric current in the electronic ignition device, the power input of protector (5) connects automobile ignition switch.

2. protector as claimed in claim 1; it is characterized in that; said trigger element is by integrated package GD4001B (2); triode T3; T4; resistance R 8～R14; capacitor C 2; relay J 3 is formed; 1 of integrated package GD4001B (2); 2; 5; 6; 8; 9; 12; 13 pin link together by R12 and the C2 input end (4) as trigger element; 3 of integrated package; 4; 10; 11 pin link together and link to each other by the base stage of resistance R 11 with triode T3; the collector electrode of T3 links to each other with the base stage of triode T4 and joins by the power input (5) of resistance R 13 with protector; triode T3; the grounded-emitter connection of T4, the collector electrode of T4 joins with power input (5) by relay J 3 and resistance R 14.

3. protector as claimed in claim 2; it is characterized in that; said engine igniting coil cutting unit is made up of the normally opened contact and the resistance R 7 of relay J 1, relay J 3; J1 one end ground connection; the normally opened contact of the other end serial connection J3 links to each other with protector power input (5) with R7, and the normally-closed contact two ends of J1 link to each other with output node (1), (2) of protector respectively.

4. protector as claimed in claim 3; it is characterized in that; between relay J 1 and power supply, also be provided with one and comprise integrated package GD4001B (1); triode T1; T2; resistance R 1～R6R27; capacitor C 1; relay J 2 is in 10 seconds unit of interior time-delay; resistance R 1; capacitor C 1 be serially connected in and power supply (5) between; the positive pole of C1 connects 8 of integrated package; 9; 12; 13 pin; 1 of integrated package; 2; 5; 6; 10; 11 pin link to each other and join by R2 and power supply (5); 3; 4 pin connect the base stage of T1 by resistance R 4; its collector electrode connects the base stage of T2 and connects power supply (5) by resistance R 5; the collector electrode of T2 meets power supply (5), T1 by J2 and R6; the grounded-emitter connection of T2, the normally-closed contact of J2 is serially connected between J1 and power supply.

5. protector as claimed in claim 4; it is characterized in that; it also is provided with an alarm unit; comprise integrated package GD4001B (3); triode T5; T6; resistance R 15～R24; capacitor C 3; C4 and relay J 4 are formed; R15 and C3 are serially connected between power supply and ground; 12 of the positive pole of C3 and integrated package; 13 pin join; 5 of integrated package; 6 pin by R22 and C4 and trigger element input end (4) and connect; 4 of integrated package; 8; 9 pin and connect the back join by R16 and power supply (5); 1; 2; 11 pin and connect the back join by R19 and power supply (5); 3; 4 pin are respectively by resistance R 20; R21 connects the base stage of T5; the collector electrode of T5 connects the base stage of T6 and joins by R23 and power supply (5); the collector electrode of T6 joins T5 by J4 and R24 and power supply (5); the grounded-emitter connection of T6, the normally opened contact two ends (3) of J4; (6) connect respectively car horn negative terminal and ground.

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