CN105673215B - The closing method of decompression is reverse-located for engine - Google Patents

The closing method of decompression is reverse-located for engine Download PDF

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Publication number
CN105673215B
CN105673215B CN201610117723.9A CN201610117723A CN105673215B CN 105673215 B CN105673215 B CN 105673215B CN 201610117723 A CN201610117723 A CN 201610117723A CN 105673215 B CN105673215 B CN 105673215B
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China
Prior art keywords
engine
decompression
reverse
setting value
closing method
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CN201610117723.9A
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CN105673215A (en
Inventor
何林
刘小勇
郭成美
严仕涛
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CHONGQING LIHUA AUTOMATIC TECHNOLOGY Co.,Ltd.
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Chongqing Genfu Software Development Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
    • F02D17/04—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling rendering engines inoperative or idling, e.g. caused by abnormal conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/08—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for decompression, e.g. during starting; for changing compression ratio

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

The invention discloses a kind of closing method that decompression is reverse-located for engine；First, before engine will stall, motor rotates forward, and engine is stopped after just going to the reduction point of the mechanism of decompressor；Motor is inverted, and engine is reverse-located, and the mechanism of decompressor of engine is entered the position between decompression state starting point and end point, stops motor driving；Using the present invention, decompression state is in before engine start can be made, reduces load when engine starts, makes vehicle launch so as to respond rapidly to start-up operation, improves starting performance.

Description

The closing method of decompression is reverse-located for engine
Technical field
The invention belongs to the technical field of engine start, is specifically related to a kind of engine that is used for and reverse-locates decompression Closing method.
Background technology
In the prior art, a kind of mechanism of decompressor of reverse back rotation mechanism has been used during motorcycle initiating, the mechanism of decompressor Effect is smaller and design in order to start bent axle rotational resistance next time, and bent axle is also transported by inertia after turning off ignition switch Turn, due to the effect of the resistance of compression travel, piston stops before compression top center is reached and lower enforcement bent axle reversion, as long as bent The generation of axle one inverts the mechanism of decompressor and begins to work and jack up a valve, without pressure in valve opening cylinder, in next time Engine, which reduces resistance to compression pression, when starting motor work is easier startup, is gone as long as bent axle rotates forward by compression travel and acting Journey, into instroke after just release valve unlatching.
In the above prior art, when there are following three kinds of situations, the mechanism of decompressor can be caused to fail, engine start resistance Power increases, so as to the phenomenon of difficulty in starting occur：
1) being introduced into compression travel when engine is shut down causes no reversal development；
2) the too small initiating terminal for causing reverse angle to be introduced into the mechanism of decompressor of engine compresses resistance；
3) the excessive end end for causing reverse angle to exceed the mechanism of decompressor of engine compresses resistance.
The content of the invention
In view of this, should it is an object of the invention to provide a kind of closing method that decompression is reverse-located for engine The closing method of decompression is reverse-located for engine makes the mechanism of decompressor be in mechanism of decompressor reduction point by the way that engine is rotated forward, Then another mistake forwarding motivation makes the mechanism of decompressor be in the initiating terminal of mechanism of decompressor work and terminates the position between end, so that under Engine, which reduces resistance to compression pression, during secondary startup motor work is easier startup.
In order to achieve the above object, the present invention is used for the closing method that engine reverse-locates decompression, and its step is as follows：
1) before engine will stall, motor rotates forward, and engine is stopped after just going to the reduction point of the mechanism of decompressor Only；
2) motor is inverted, and engine is reverse-located, and the mechanism of decompressor of engine is risen into decompression state Position between initial point and end point, stop motor driving.
Further, in step 1), when the following situation of appearance：
1) driving current rises to current value set in advance during engine stall；
2) engine reverse signal is detected during forward drive engine；
3) when with maximum driving force forward drive engine, detect that engine speed is higher than the 1st benchmark set in advance After speed, then there is engine speed and be less than the 2nd reference speed set in advance, the 2nd reference speed is less than the 1st reference speed 50%；
Any of which situation occurs, and judges that engine enters compression travel, assert that pressure-reducing valve enters reduction point.
Further, when control starts motor and rotated forward, detect that engine speed is less than the 1st setting value by testing agency When, motor, make engine speed constant in the 2nd setting value.
Further, the 1st setting value is 300rpm~500rpm, and the 2nd setting value is 200rpm~600rpm.
Further, in step 2), by controlling engine to invert, according to testing agency, reverse angle, control electricity are judged Machine makes engine enter the position between decompression state starting point and end point.
Further, wherein reverse angle is 60 degree of maximum decompression angles to pressure-reducing valve.
Further, the size of the end point distance of backward position and decompression state is detected by testing agency, to control hair The speed reversal of motivation.
Further, after being less than the 3rd setting value by the end point distance of testing agency's detection backward position and decompression state, Controlled motor three-phase shortcircuit is braked.
Further, after being less than the 4th setting value by the end point distance of testing agency's detection backward position and decompression state, Controlled motor forward drive is braked.
Further, the 3rd setting value is 40~80 degree, and the 4th setting value is 20~40 degree.
Further, in the case where disconnecting battery powered and making engine stop, controlling organization voluntarily connects battery, until complete Stop self-powered into after reverse-locating decompression.
The beneficial effects of the present invention are：
The present invention is used for engine and reverse-locates the closing method depressurized by the way that crank is reversed into reduced pressure zone, then Positive startup is carried out again, can control engine when rotating forward turns over compression travel, and pressure-reducing valve work makes engine be in decompression State, engine start resistance is substantially reduced, this method extends the pressure-reducing valve working time, can quickly improve engine and turn Speed, improve the startability of engine.
Brief description of the drawings
In order that the purpose of the present invention, technical scheme and beneficial effect are clearer, the present invention provides drawings described below and carried out Explanation：
Fig. 1 is that the present invention is used for the action schematic diagram that engine reverse-locates the closing method of decompression；
Fig. 2 is that the present invention is used for the crank angle location of closing method and the signal of torque that engine reverse-locates decompression Figure；
Fig. 3 is the oscillogram that this method inverts location engine crank position by hypodontia signal and hall signal；
Fig. 4 is that this method controls waveform design sketch by speed stabilizing；
Fig. 5 is the control flow chart for reverse-locate the closing method of decompression when the engine of the present invention is shut down；
Fig. 6 is the control flow chart that the response start-up operation of the present invention reverse-locate the closing method of decompression.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
As shown in Figure 1, Figure 2, shown in Fig. 5, Fig. 6, a kind of engine of the present invention reverse-locate the shutdown side of decompression when shutting down Method, its step are：
1) before engine will stall, motor rotates forward, and engine is stopped after just going to the reduction point of the mechanism of decompressor Only；
2) motor is inverted, and engine is reverse-located, and the mechanism of decompressor of engine is risen into decompression state Position between initial point and end point, stop motor driving.
The present embodiment is in response to what is be controlled when engine is shut down, in each engine misses to the mistake stopped completely Cheng Zhong, inverted orientation method is carried out, make to be in decompression state all the time during engine stop, so as to respond rapidly to startup next time Operation, improve startability, the closing method by by crank reverse into reduced pressure zone, then carry out positive startup again, Engine can be controlled when rotating forward turns over compression travel, pressure-reducing valve work makes engine be in decompression state, substantially reduces Engine start resistance, this method extend the pressure-reducing valve working time, can quickly improve engine speed, improve engine Startability.
Further, in the closing method for being used for engine and reverse-locating decompression of the preferable present invention, in step 1), When the following situation of appearance：
1) driving current rises to current value set in advance during engine stall；
2) engine reverse signal is detected during forward drive engine；
3) during engine rotates forward, after detecting that engine speed is higher than the 1st reference speed set in advance, then go out Existing engine speed is less than the 2nd reference speed set in advance, and the 2nd reference speed is less than the 50% of the 1st reference speed；
Any of which situation occurs, and judges that engine enters compression travel, assert that pressure-reducing valve enters reduction point, the present embodiment In when any one of above-mentioned three kinds of situations occur, engine can be represented and now come into compression travel, the mechanism of decompressor In reset state, reversion positioning action can be carried out.
Further, preferably in step 1), when control starts motor and rotated forward, engine is detected by testing agency When speed is less than 1 setting value, motor, make engine speed constant in the 2nd setting value.
Further, preferable 1st setting value is 300rpm~500rpm, and the 2nd setting value is 200rpm~600rpm
1st setting value is less than according to engine speed, it is possible to determine that go out now engine and be in shutdown but do not stop completely also During only, by controlling engine speed to avoid engine and subtract because effect of inertia can not stop in the 2nd setting value The problem of press mechanism reduction point position.
In step 1), compression travel [120 degree, 180 degree] section is entered with 500rpm, it is as shown in the table：
Further, in step 1), preferably before shutdown, it is 500~650RPM to reduce engine and rotate forward rotating speed, selection The mode rotating speed of control：500RPM, allowance rotating speed 150rpm, prevent motor from turning over compression travel, experiment knot by above-mentioned control Fruit is as shown in the table：
Positive rotary speed Rotate forward time speed Turn over number Turn over proportion
500 50 0 0%
600 50 0 0%
650 20 7 35%
700 10 10 100%
Further, in step 1), when rotating speed is less than 1000rpm, the mode of three-phase shortcircuit, is quickly stopped, contracting Short down time.
Further, in step 2), by controlling engine to invert, according to testing agency, reverse angle, control electricity are judged Machine makes engine enter the position between decompression state starting point and end point, and preferably wherein reverse angle is 60 degree to decompression The maximum decompression angle of valve, the present embodiment are connected according to motor with bent axle and engine cam by mechanical structure, By the reversion of controlled motor, make the mechanism of decompressor on camshaft in running order, so that engine is in decompression state, Reduce load when engine starts.
As shown in Figure 3, Figure 4, further, in step 2), 250 degree are driven reverse by speed stabilizing control, wherein reversion is driven It is dynamic first 150 degree, engine speed is used as 400RPM, wherein 100 degree after being driven reverse, uses engine speed as 100RPM, It is as shown in the table：
Further, the size of the end point distance of backward position and decompression state is detected preferably through testing agency, is come Control the speed reversal of engine；It is preferable that the end point of backward position and decompression state 1) is detected apart from small by testing agency After the 3rd setting value, the braking of controlled motor three-phase shortcircuit；2) end of backward position and decompression state is detected by testing agency After point distance is less than the 4th setting value, the braking of controlled motor forward drive；Preferable 3rd setting value is 40~80 degree, the 4th setting It is worth for 20~40 degree, the present embodiment is when the end point of backward position and decompression state distance is less than 1 setting value, using braking Power is small but can make the motor three-phase shortcircuit mode of braking of engine stop, on the other hand, when backward position and the knot of decompression state When spot distance is less than 4 setting value smaller than the 3rd setting value, braked using the big motor forward drive of brake force, Zhi Daofa The end point of motivation backward position and decompression state distance is in the 3rd setting value between the 4th setting value.
Further, in step 2), by three-phase shortcircuit and 50 degree of forward drive two ways control reverse drive is applied Shutdown distance, crank position is fixed on suction stroke, it is as shown in the table：
Further, in step 2), cancel forward drive control for 30 degree before reverse drive, driven higher than 200rpm using positive Dynamic control, is otherwise braked using three-phase shortcircuit.
Further, after reverse drive 20 degree using forward drive control, higher than 100rpm using forward drive control, otherwise Braked using three-phase shortcircuit.
Further, preferably in the case where disconnecting battery powered and making engine stop, controlling organization voluntarily connects battery, Stop self-powered after completing to reverse-locate decompression, the present embodiment in the case where disconnecting battery powered and making engine stop, Controlling organization voluntarily connects battery, stops self-powered after completing to reverse-locate decompression, and avoid makes in disconnection battery powered In the case of engine stop, controlling organization is due to power-off so that the problem of can not carrying out reverse-locating control.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical Cross above preferred embodiment the present invention is described in detail, it is to be understood by those skilled in the art that can be Various changes are made to it in form and in details, without departing from claims of the present invention limited range.

Claims (8)

  1. A kind of 1. closing method that decompression is reverse-located for engine, it is characterised in that：Its step is as follows：
    1) before engine will stall, motor rotates forward, and engine is stopped after just going to the reduction point of the mechanism of decompressor；
    2) motor is inverted, and engine is reverse-located, the mechanism of decompressor of engine is entered decompression state starting point Position between end point, stop motor driving；
    In step 1), when the following situation of appearance：
    1) driving current rises to current value set in advance during engine stall；
    2) engine reverse signal is detected during forward drive engine；
    3) when with maximum driving force forward drive engine, detect that engine speed is higher than the 1st reference speed set in advance Afterwards, then there is engine speed and be less than the 2nd reference speed set in advance, the 2nd reference speed is less than the 1st reference speed 50%；
    Any of which situation occurs, and assert that pressure-reducing valve enters reduction point；
    When control starts motor and rotated forward, when detecting that engine speed is less than 1 setting value by testing agency, driving electricity Machine, make engine speed constant in the 2nd setting value.
  2. 2. the closing method of decompression is reverse-located for engine as claimed in claim 1, it is characterised in that：1st setting value For 300rpm~500rpm, the 2nd setting value is 200rpm~600rpm.
  3. 3. the closing method of decompression is reverse-located for engine as claimed in claim 1, it is characterised in that：In step 2) In, by controlling engine to invert, according to testing agency, judge reverse angle, controlled motor makes engine enter decompression state Position between starting point and end point.
  4. 4. the closing method of decompression is reverse-located for engine as claimed in claim 3, it is characterised in that：Wherein angle of twist Spend the maximum decompression angle for 60 degree to pressure-reducing valve.
  5. 5. the closing method of decompression is reverse-located for engine as claimed in claim 3, it is characterised in that：Pass through detection machine Structure detects the size of the end point distance of backward position and decompression state, to control the speed reversal of engine.
  6. 6. the closing method of decompression is reverse-located for engine as claimed in claim 5, it is characterised in that：
    1) after being less than the 3rd setting value by the end point distance of testing agency's detection backward position and decompression state, controlled motor Three-phase shortcircuit is braked；
    2) after being less than the 4th setting value by the end point distance of testing agency's detection backward position and decompression state, controlled motor Forward drive is braked.
  7. 7. the closing method of decompression is reverse-located for engine as claimed in claim 6, it is characterised in that：3rd setting value For 40~80 degree, the 4th setting value is 20~40 degree.
  8. 8. the closing method of decompression is reverse-located for engine as claimed in claim 1, it is characterised in that：Disconnect battery In the case that power supply makes engine stop, controlling organization voluntarily connects battery, stops confession after completing to reverse-locate decompression Electricity.
CN201610117723.9A 2016-03-02 2016-03-02 The closing method of decompression is reverse-located for engine Active CN105673215B (en)

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CN105673215B true CN105673215B (en) 2018-04-06

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4590905A (en) * 1984-05-04 1986-05-27 Honda Giken Kogyo Kabushiki Kaisha Process for decompression control in internal combustion engine and apparatus therefor
CN1460147A (en) * 2001-03-30 2003-12-03 本田技研工业株式会社 Decompressor for 4-stroke cycle IC engine
CN1991135A (en) * 2005-12-28 2007-07-04 株式会社日立制作所 Variable valve actuation system of internal combustion engine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008082297A (en) * 2006-09-28 2008-04-10 Honda Motor Co Ltd Decompression device of internal combustion engine
US7699035B1 (en) * 2008-09-29 2010-04-20 S & S Cycle, Inc. Compression release mechanism

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4590905A (en) * 1984-05-04 1986-05-27 Honda Giken Kogyo Kabushiki Kaisha Process for decompression control in internal combustion engine and apparatus therefor
CN1460147A (en) * 2001-03-30 2003-12-03 本田技研工业株式会社 Decompressor for 4-stroke cycle IC engine
CN1991135A (en) * 2005-12-28 2007-07-04 株式会社日立制作所 Variable valve actuation system of internal combustion engine

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