CN105604704A - Automatic control system and device for idling speed elevation of diesel engine - Google Patents
Automatic control system and device for idling speed elevation of diesel engine Download PDFInfo
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- CN105604704A CN105604704A CN201510556640.5A CN201510556640A CN105604704A CN 105604704 A CN105604704 A CN 105604704A CN 201510556640 A CN201510556640 A CN 201510556640A CN 105604704 A CN105604704 A CN 105604704A
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- diesel engine
- idling
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- speed
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- High-Pressure Fuel Injection Pump Control (AREA)
Abstract
The invention discloses an automatic control system and device for idling speed elevation of a diesel engine, which is such structured that a vacuum pumping pipe is provided between a vacuum diaphragm capsule and a vacuum pump, and is divided into an upper segment and a lower segment by a solenoid valve, the upper segment is connected to the vacuum diaphragm capsule, the lower segment is connected to a pumping connector of the vacuum pump, a control line of the solenoid valve is connected to an electronic control unit, a signal harness of a revolution speed transducer is also connected to the electronic control unit, a diaphragm in the vacuum diaphragm capsule is in connection with one end of a pull rod, an accelerator of an oil injection pump is hooked with the other end of the pull rod through a hook, and a detection head of the revolution speed transducer is provided right above a flywheel ring gear in a flywheel housing. According to the automatic control system and device for the idling speed elevation of the diesel engine disclosed by the invention, the defect of weak torque of the diesel engine in idling operation is overcome, the malfunctions of underpowered elevation and no response by throttling up the engine of a forklift and other engineering machinery at an idling speed are overcome, the problems of decreased idling speed and unstable revolution caused by the start-up of an air-conditioner are also solved, and the device is widely applicable to diesel engines of all machinery pumps.
Description
Technical field
The invention belongs to engine components, be specifically related to a kind of automatic control that Idling Process for Diesel Engine is promotedDevice.
Background technology
Idling is that mean engine turns round in uncharge situation, maintains the minimum speed of engine " idle running ",Not external power output. Diesel engine for automobile generally carries out operation without idling, but some class is as fork truck, excavatorNeed to carry out operation when the idling Deng industrial diesel engine. If fork truck is when the cargo lifting, at idling modeLower non-refuelling door directly promotes lifting handle cargo lifting. Now can often occur because of the fully loaded idling lifting of fork truckUnable, goods cannot be delivered to position problem. According to Fig. 1, its reason is described: when diesel engine starting, speed governingHandle is at idle position, and after injection pump starting, idling speed governing spring works, now as the curve II in Fig. 1,D → J is the control zone of governor spring in the time of idle position; J → K is that governor spring and idling stabilizing spring are made a concerted effortControl zone; K point is idling operation point. Throttle control handle in the time of full speed position as the external characteristic curve I in Fig. 1,Because the moment of torsion of diesel engine when the idling is very little, common forklift promotes the parcel limiting all can exceed diesel engineMoment of torsion when idling, diesel engine can decline because of high load capacity rotating speed. Now rotating speed reduces, but the tooth bar of injection pumpNow how, stroke (oil pressure) is but increasing, in the time that rotating speed drops to minimum point (idling D point in Fig. 1),Pull throttle control handle, rotating speed also can not rise, because now injection pump rack stroke reaches maximum. Here it isAlthough open the throttle but fork truck still promotes unable reason. Want head it off, need also not arrive in idlingWhen minimum point, refuel, injection pump is reached as the curve I in Fig. 1, arrive external characteristics district at full speed, make diesel oilMachine rise of rotational speed moment of torsion increases. But because artificial operation comparatively lags behind, when oiling, idling has dropped to minimum point,Injection pump rack has reached the maximum position of stroke. Cause thus and open the throttle and be helpless to promote to the feelings of powerCondition.
For addressing this problem, the present invention adjusts the variation of Real-Time Monitoring diesel engine speed injection pump automaticallyTooth bar, controls injection pump and refuels, and reaches the effect that recovers rotating speed and increase moment of torsion. Not only can refuel guarantor in good timeHold idling, even and if under idling operation increase load (as open air-conditioning), also just can maintain diesel engineNormal rotating speed. Separately, this invention can also solve diesel engine for automobile in the time of idling operation, open air-conditioning and make rotating speed reduceToo much cause the fault of unstable idle speed.
Summary of the invention
The object of the invention is, propose a kind of automaton that Idling Process for Diesel Engine is promoted, forAutomobile or fork truck, in the time that idling mode increases load, prevent that rotating speed and moment of torsion from declining and unstable idle speed phenomenon.
For the structure that realizes this object technology proposed by the invention is: establish between aneroid capsule and vavuum pumpHave vacuum exhaust pipe, magnetic valve is taken out pipe by vacuum and is divided into two sections, and epimere exhaust tube is connected to aneroid capsule;Hypomere exhaust tube is connected to the air extraction connector of vavuum pump, and the control line of magnetic valve is connected to ECU. Vacuum diaphragmDiaphragm in box is connected with one end of pull bar, and the other end of pull bar is provided with drag hook, and drag hook is hooked in the throttle of injection pumpOn. Speed probe is fixed on bell housing, the detecting head of speed probe be arranged at flywheel ring gear directly over,The tach signal wire harness of speed probe is connected to ECU.
Its structural principle is: flywheel rotates together with gear ring, and speed probe is experienced gear ring cutting magnetic line and turnedChange into pulse signal. Tooth of the every rotation of gear ring, speed probe sends a pulse signal to ECU.ECU changes into diesel engine speed according to the number of teeth of gear ring by pulse signal, then change according to setting speedLimit value, control magnetic valve upper and lower section of exhaust tube connected, the diaphragm in aneroid capsule under vacuum action, profitOrder about the variation of injection pump to oil mass with moving around of pull bar.
ECU is controlled the opening and closing of magnetic valve according to the rotating speed bound of tach signal and setting; WhenEngine idle is during lower than setting speed, and magnetic valve is opened and connected vavuum pump and aneroid capsule, drives pull bar to pullThrottle hand, to refueling direction motion, makes diesel engine increase moment of torsion in increasing oil mass, plays recovery idling and turnsSpeed, increases the effect of moment of torsion; In the time that diesel engine speed increases to the higher limit of setting, ECU control electromagnetismThe closed vacuum line of valve, bellows is under the effect of atmospheric pressure, and pull bar returns to original state.
The beneficial effect of feature of the present invention and generation is: (1) adopts speed probe and ECU monitoring bavinThe variation of oil machine rotating speed, when the idling of diesel engine is reduced to setting value, the spray of idling lifting automatic controlling systemOil pump refuels, and reaches the effect that recovers rotating speed and increase moment of torsion; (2) made up diesel engine does under idlingThe defect of moment of torsion deficiency when industry, has effectively solved the lifting in the time of idling of fork truck and other engineering machinery unable, addsThe unresponsive fault of throttle, opens air-conditioning when (3) have solved vehicular engine because of idling and causes under idling speedThe problems such as rotary speed unstabilization are fallen. And this structure is adapted at extensive use on the diesel engine of all mechanical pumps.
Brief description of the drawings
Fig. 1 is the graph of relation of injection pump rack stroke and rotation speed change.
Fig. 2 is technical pattern sketch of the present invention.
Fig. 3 is that the present invention is assembled in the example structure sketch on diesel engine.
Detailed description of the invention
Below in conjunction with accompanying drawing and by embodiment, structural principle of the present invention is described in detail. Diesel engineIdling lifting automatic control system device comprises: ECU, vavuum pump, magnetic valve, aneroid capsule, pull bar,Injection pump, speed probe, bell housing, flywheel ring gear, signal wire harness etc.
This example is applicable to the engine of vacuum braking, if the diesel engine of braking for gas also needs to configure thinThe mechanisms such as wall cylinder, air pump, gas receiver. Structure of the present invention is: between aneroid capsule 5 and vavuum pump 2Be provided with vacuum exhaust pipe, magnetic valve 3 is taken out pipe by vacuum and is divided into two sections, and epimere exhaust tube 4-1 is connected to veryEmpty bellows; Hypomere exhaust tube 4-2 is connected to the air extraction connector of vavuum pump, and the control line 6-1 of magnetic valve is connected toECU 1. Diaphragm in aneroid capsule is connected with one end of pull bar 7, and the other end of pull bar is provided with drag hook,Drag hook is hooked on the throttle of injection pump 8. Speed probe 9 is fixed on bell housing 10, speed probeDetecting head be arranged at flywheel ring gear 11 directly over. The tach signal wire harness 6-2 of speed probe is connected to automatically controlledUnit.
The signal that ECU is sent to according to speed probe, controls magnetic valve upper and lower section of exhaust tube is connected.Diaphragm in aneroid capsule is under vacuum action, by pull bar, automatic in the situation that driver does not control throttleAdjust the size of injection pump accelerator open degree.
The structure of idling lifting automatic control system of the present invention is provided for the diesel engine of vacuum braking, but asFruit aneroid capsule is replaced with thin cylinder; Vavuum pump is replaced with air pump or gas receiver, and idling lifting is controlled system automaticallySystem can be used on the diesel engine of gas braking.
Implementation process of the present invention and principle are: according to injection pump idling characteristic curve, first set oneIdling put the idle position control area that governor spring and idling spring concur (or in Fig. 1 D → JIn the region of ordering near J in curve) be set as lower limit tachometer value. Reset a maximum speed as higher limit,After this upper limit rotating speed cargo lifting required torque, rotating speed can drop to (this value is measured by test) near idle speed value.The difference of these two rotating speeds and idling is greater than the fluctuation of speed value of diesel engine.
In the time that diesel engine is subject to load during in idling, diesel engine speed is started to decline by original idling, works as diesel oilWhen the idling of machine drops to certain setting lower limit rotating speed, ECU is according to receiving the pulse that speed probe transmitsSignal, control piper electromagnetic valve work. Now magnetic valve is connected two sections exhaust tube, in aneroid capsuleDiaphragm, under the effect of vacuum, moves to throttle acceleration direction. The pull bar being connected with diaphragm pulls throttle also to addingThe direction motion of oil, reaches the effect of oiling lifting rotating speed. When diesel engine speed exceedes former idle speed value after promotingWhile reaching the upper limit tachometer value of setting, ECU sends instruction again, and solenoid closure, by two sections of exhaust tubesDisconnection stops bleeding, and now diaphragm and pull bar return to again reset condition under the effect of atmospheric pressure. Pull barStroke can be adjusted on test-bed, guarantees the accuracy of throttle stroke.
As embodiment, if CY6102BG Idling Process for Diesel Engine is when the 850r/min, add certain load, bavinOil machine idling can drop to liminal value 500r/min (the corresponding rotating speed of D point in Fig. 1). Now for adjustingThe control area minimum speed point of speed spring in the time of idle position, injection pump rack stroke reaches maximum. IfAt this moment load increases again, and diesel engine just can stop working. Now set a lower limit rotating speed: in idling point and speed governingSpring is in the region of idle position control area minimum speed point, near a tachometer value of idling. This rotating speedBe greater than the fluctuation of speed value of diesel engine with the difference of idling. Because rotating speed is reduced to the lower limit of setting, automatically controlled listVacuum in unit and solenoid control aneroid capsule, and implement to refuel. Do not drop to D point rotating speed at rotating speedBefore, refuel and make diesel engine towards the operation of external characteristic curve direction, increase rotating speed and corresponding moment of torsion. Reach with thisDuring to the operation of Idling Process for Diesel Engine operating mode, increase the object of torsional moment of diesel engine.
Claims (3)
1. Idling Process for Diesel Engine promotes automatic control system device, comprising: ECU, vavuum pump, magnetic valve,Aneroid capsule, pull bar, injection pump, speed probe, bell housing, flywheel ring gear, signal wire harness, thin-walled gasCylinder, air pump, gas receiver, is characterized in that: between aneroid capsule (5) and vavuum pump (2), be provided with vacuum and take outTracheae, magnetic valve (3) is taken out pipe by vacuum and is divided into two sections, and epimere exhaust tube (4-1) is connected to vacuum diaphragmBox (5); Hypomere exhaust tube (4-2) is connected to the air extraction connector of vavuum pump, the control line (6-1) of magnetic valveBe connected to ECU (1), the diaphragm in aneroid capsule is connected with the one end of pull bar (7), another of pull barEnd is provided with drag hook, and drag hook is hooked on the throttle of injection pump (8); Speed probe (9) is fixed on bell housing (10)Upper, the detecting head of speed probe be arranged at flywheel ring gear (11) directly over, the rotating speed letter of speed probeNumber wire harness (6-2) is connected to ECU.
2. promote automatic control system device according to Idling Process for Diesel Engine claimed in claim 1, it is characterized in that:Be sent to signal by described ECU (1) according to described speed probe (9), control described magnetic valve (3)Described upper and lower section of exhaust tube connected, and the diaphragm in described aneroid capsule, under vacuum action, draws by describedBar leaves greatly the throttle of described injection pump.
3. promote automatic control system device according to Idling Process for Diesel Engine claimed in claim 1, it is characterized in that:The structure of described idling lifting automatic control system is provided for the diesel engine of vacuum braking, if but described trueEmpty bellows is replaced with thin cylinder; Described vavuum pump is replaced with air pump or gas receiver, and described idling lifting is controlled automaticallySystem processed can be used on the diesel engine of gas braking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510556640.5A CN105604704A (en) | 2015-09-01 | 2015-09-01 | Automatic control system and device for idling speed elevation of diesel engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510556640.5A CN105604704A (en) | 2015-09-01 | 2015-09-01 | Automatic control system and device for idling speed elevation of diesel engine |
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| CN105604704A true CN105604704A (en) | 2016-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510556640.5A Pending CN105604704A (en) | 2015-09-01 | 2015-09-01 | Automatic control system and device for idling speed elevation of diesel engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111765011A (en) * | 2020-06-10 | 2020-10-13 | 东风汽车集团有限公司 | Idling control method for engine parts after fault |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS593128A (en) * | 1982-06-29 | 1984-01-09 | Hino Motors Ltd | Warming-up device of diesel engine |
| CN2094622U (en) * | 1991-07-01 | 1992-01-29 | 陈昌柱 | Vacuum air-changing fuel saving device |
| CN2828341Y (en) * | 2005-07-21 | 2006-10-18 | 贵州红华科技开发有限公司 | Draw-hook type connection structure of engine throttle actuator and oil pump oil-off pull-rod |
| CN200978723Y (en) * | 2006-11-29 | 2007-11-21 | 孙郑民 | Vacuum idling hoisting device |
-
2015
- 2015-09-01 CN CN201510556640.5A patent/CN105604704A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS593128A (en) * | 1982-06-29 | 1984-01-09 | Hino Motors Ltd | Warming-up device of diesel engine |
| CN2094622U (en) * | 1991-07-01 | 1992-01-29 | 陈昌柱 | Vacuum air-changing fuel saving device |
| CN2828341Y (en) * | 2005-07-21 | 2006-10-18 | 贵州红华科技开发有限公司 | Draw-hook type connection structure of engine throttle actuator and oil pump oil-off pull-rod |
| CN200978723Y (en) * | 2006-11-29 | 2007-11-21 | 孙郑民 | Vacuum idling hoisting device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111765011A (en) * | 2020-06-10 | 2020-10-13 | 东风汽车集团有限公司 | Idling control method for engine parts after fault |
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