CN203532061U - Control device for engine braking - Google Patents
Control device for engine braking Download PDFInfo
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- CN203532061U CN203532061U CN201320536479.1U CN201320536479U CN203532061U CN 203532061 U CN203532061 U CN 203532061U CN 201320536479 U CN201320536479 U CN 201320536479U CN 203532061 U CN203532061 U CN 203532061U
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Abstract
A control device for engine braking comprises a clutch switch (2), an exhaust brake switch (4), a Yuchai common rail engine control unit EECU and an ignition lock ON shift switch (1), wherein the clutch switch (2) is connected with a motion conversion double-contact relay (3), one end of a normally open contact of the motion conversion double-contact relay (3) is connected with one end of the exhaust brake switch (4), the other end of the normally open contact of the motion conversion double-contact relay is connected to a pin 4 of the Yuchai common rail engine control unit EECU, the other end of the exhaust brake switch (4) is connected to the pin 1 of the Yuchai common rail engine control unit EECU, one end of a normally closed contact of the motion conversion double-contact relay (3) is connected to the pin 3 of the Yuchai common rail engine control unit EECU through a signal line, and the other end of the normally closed contact of the motion conversion. The clutch switch (2) is used for separating two paths of signals so as to achieve the cruise and engine brake dual control functions.
Description
Technical field
The utility model relates to a kind of control gear, relates in particular a kind of control gear of engine braking, belongs to motor car engine complemental brake system technical field.
Background technique
Engine braking full name is motor auxiliary braking system, it is as a kind of auxiliary braking technology, be widely used on motorbus and heavy-duty commercial vehicle, its utilization effectively reduces the mechanical wear of tradition brake, improve the working life of traditional brake, effectively improved the safety reliability of Vehicle Driving Cycle, reduced greatly the working service cost of vehicle, Lifting Convey efficiency, particularly promotes the safety reliability of load-carrying vehicle when lower long slope.Engine braking is divided and can be divided three classes according to its working principle: the braking of exhaust butterfly valve, is called again exhaust brake; Deflation type braking; Compression-release type braking, is called again engine braking, is by changing the port timing of engine exhaust port, when compression stroke closes to an end, open exhaust valve, the compression energy of motor is all discharged, make motor by transmission system, absorb the power of vehicle, thereby the short time is reduced the speed of a motor vehicle.In three kinds of modes of braking, braking effect is best is compression-release type braking, now domesticly also gradually brings into use, and being expected to is becoming main engine braking product in the future.
In the vehicles such as sky bright and beautiful KM6H, the KM7H of existing DongFeng Automobile Co., Ltd, KM8H, adopt compression-release type braking, in these vehicles, be equipped with Yuchai 6J tetra-valves rail motor altogether, specifically referring to Fig. 1, one end of exhaust brake switch 4 is connected on control unit of engine EECU and is responsible for receiving on the pin one of exhaust brake signal input, the other end of exhaust brake switch 4 is connected on the pin two of control unit of engine EECU, and pin two is responsible for providing positive source; One end of clutch switch 2 is connected on control unit of engine EECU and is responsible for receiving on the pin 3 of clutch switch signal, and the other end of clutch switch 2 is connected on the pin 4 of control unit of engine EECU, and pin 4 is responsible for providing positive source.Exhaust brake switch 4 closures during work, brake switch signal reaches control unit of engine EECU, and control unit of engine EECU controls exhaust butterfly valve and engine braking solenoid valve again, thereby realizes engine compression brake; But this engine braking is failed the initial conditions that the input signal of clutch switch 2 is exited as engine cylinder inside brake function.Because this engine braking is to adopt Yuchai 6J tetra-valves rail control unit of engine EECU altogether, this Yuchai altogether rail control unit of engine EECU adopts BOSCH EDC7 automatical control system, it exits the input signal that connects clutch switch 2 initial conditions as cruise function, in former design, reckon without engine braking function, therefore also just do not consider that clutch switch 2 is as the control strategy that exits signal of engine cylinder inside brake; Now, cruise function and braking function all need the input signal of clutch switch 2, but the control of the two requires difference, therefore cannot coexist, and, as retained cruise function, engine cylinder inside brake lacks the restriction of clutch switch 2; As retain clutch switch 2 restriction of engine cylinder inside brake, cruise function cannot be provided.Therefore there is the phenomenon of " during descending,, after let slip the clutch, engine braking is not removed " in this engine brake, after vehicle trial assembly.This system cannot reach by the mode of software upgrading at present increases clutch switch 2 input signals as the exit criteria of engine cylinder inside brake; If again develop double-contact clutch switch, not only there is long, the high factor of expense of construction cycle, also have clutch pedal spatial position less, difficult arrangement etc.; If adopt existing single contact clutch switch, in the time of cannot solving descending, after let slip the clutch, engine braking is not removed problem.
Summary of the invention
The purpose of this utility model is can not the while as cruise function signal and engine cylinder inside brake, exit the problem of signal for the input signal of clutch switch in existing engine compresses release type braking, and a kind of control gear of engine braking is provided.
For achieving the above object, technical solution of the present utility model is: a kind of control gear of engine braking, comprise clutch switch, exhaust brake switch, Yuchai is rail control unit of engine EECU and ignition lock ON gear switch altogether, described Yuchai altogether rail control unit of engine EECU adopts BOSCH EDC7 automatical control system, described clutch switch is connected with action conversion double-contact relay by signaling line, one end of described action conversion double-contact relay normally opened contact is connected with one end of exhaust brake switch by signaling line, its the other end is connected on the pin 4 of the common rail control unit of engine EECU in Yuchai, the other end of described exhaust brake switch is connected on the pin one of the common rail control unit of engine EECU of bavin, one end of described action conversion double-contact relay normally-closed contact is connected on the pin 3 of the common rail control unit of engine EECU in Yuchai by signaling line, its the other end is connected on the pin 4 of the common rail control unit of engine EECU in Yuchai.
Compared with prior art, the beneficial effects of the utility model are:
Modern design, simple in structure, reliable performance, cost is lower, has solved the separated two road signals of a clutch switch, to reach, cruises and engine braking dual control function processed.In the utility model, clutch switch is connected with action conversion double-contact relay, one end of action conversion double-contact relay normally opened contact is connected with one end of exhaust brake switch, the other end of exhaust brake switch is connected on the pin one of the common rail control unit of engine EECU in Yuchai, with normally opened contact SC sigmal control exhaust brake switch signal, inputs to motor EECU; One end of action conversion double-contact relay normally-closed contact is connected on the pin 3 of the common rail control unit of engine EECU in Yuchai, with normally-closed contact signal, as clutch switch signal, input to motor EECU, the utility model had both retained the cruise function of clutch switch signal as vehicle, again well as the basis for estimation of engine braking function, simplified the cost of designing and developing of the common rail control unit of engine EECU in Yuchai, greatly saved the development time, the project implementation has been guaranteed to exploitation node.
Accompanying drawing explanation
Fig. 1 is the control gear schematic diagram of existing engine braking.
Fig. 2 is the utility model structural representation.
In figure: ignition lock ON gear switch 1, clutch switch 2, action conversion double-contact relay 3, exhaust brake switch 4.
Embodiment
Below in conjunction with accompanying drawing explanation and embodiment, the utility model is described in further detail.
Referring to Fig. 2, a kind of control gear of engine braking, comprise clutch switch 2, exhaust brake switch 4, Yuchai is rail control unit of engine EECU and ignition lock ON gear switch 1 altogether, described Yuchai altogether rail control unit of engine EECU adopts BOSCH EDC7 automatical control system, described clutch switch 2 is connected with action conversion double-contact relay 3 by signaling line, one end of described action conversion double-contact relay 3 normally opened contacts is connected with one end of exhaust brake switch 4 by signaling line, its the other end is connected on the pin 4 of the common rail control unit of engine EECU in Yuchai, pin 4 is responsible for providing positive source, the action conversion double-contact relay 3 adopting in reality adopts convex type connect-disconnect structure, and the relay of this structure can plug separated with base.Basic structure is wiring after convex type installation, plate.This structure is also referred to as A Ji structure, and its voltage rating is that 24V, load current are 30A.The other end of described exhaust brake switch 4 be connected on Yuchai altogether rail control unit of engine EECU be responsible for receiving the input of exhaust brake signal pin one on, one end of described action conversion double-contact relay 3 normally-closed contacts is connected on the common rail control unit of engine EECU in Yuchai by signaling line and is responsible for receiving on the pin 3 of clutch switch signal, its the other end is connected on the pin 4 of the common rail control unit of engine EECU in Yuchai, the Yuchai altogether state of rail control unit of engine EECU pin 3 is when EECU powers on, and pin 3 receives high level signal all the time.When vehicle is opened cruise function, whether Yuchai altogether rail control unit of engine EECU can change by Real-Time Monitoring pin 3 signals, if pin 3 signals detected, is still high level, and EECU sends instruction, and now vehicle continues to maintain cruising condition; If pin 3 signals detected, transfer low level to, EECU sends instruction immediately, and vehicle exits cruising condition.If but vehicle is not in cruising condition, Yuchai altogether rail control unit of engine EECU can not send instruction and remove to detect pin 3 and whether have signal, while being also non-cruising condition and the state of clutch switch be that it doesn't matter, and only when opening cruise function, motor EECU just can follow the tracks of clutch switch signal.
During work, ON gear switch is closed.When clutch pedal is not stepped on, now clutch switch is closed state, action conversion double-contact relay 3 coil-end have electricity, now normally opened contact is now in closed state, normally-closed contact, now in off state, because exhaust brake switch 4 is connected with one end of normally opened contact, is now pressed exhaust brake switch 4 and is made it closed, the pin one of the common rail control unit of engine EECU in Yuchai receives exhaust brake signal, and motor starts to enter braking state; When vehicle is opened cruise function, the pin 3 that is total to rail control unit of engine EECU due to Yuchai is connected with one end of normally-closed contact, and now pin 3 inputs of the common rail control unit of engine EECU in Yuchai are still high level signal, and motor can maintain cruising condition.After let slip the clutch, clutch switch is off state, action conversion double-contact relay 3 coils are converted to power-off after because of former energising, its normally opened contact is in off state, normally-closed contact is now in closed state, and now no matter whether exhaust brake switch 4 disconnects, and the pin one that is total to rail control unit of engine EECU due to Yuchai does not receive signal, motor is not braked, and motor exits braking state immediately; The pin 3 of the common rail control unit of engine EECU in Yuchai receives the cut-off signal of clutch switch 2 simultaneously, the signal of inputting the pin 3 of the common rail control unit of engine EECU in Yuchai transfers low level to, pin 3 triggers, if now vehicle is in cruising condition, Yuchai altogether rail control unit of engine EECU judgement receives driver's let slip the clutch signal, i.e. clutch switch cut-off signal, so instruction is sent in Yuchai altogether rail control unit of engine EECU, vehicle exits cruising condition.In the utility model, by action, change the rear double-contact generation saltus step function of double-contact relay 3 energising, make the normally-closed contact signal of action conversion double-contact relay 3 input to Yuchai rail control unit of engine EECU altogether as clutch switch signal, normally opened contact signal inputs to Yuchai rail control unit of engine EECU altogether as the control signal of exhaust brake switch 4, after having realized clutch switch 2 and disconnecting, be let slip the clutch, motor can meet to exit and cruises and exhaust brake two states, to reach, cruises and engine braking dual control function processed.During use, the common rail control unit of engine EECU in Yuchai need adjust clutch switch 2 and exhaust brake switch 4 is total to power pin, to guarantee that motor EECU correctly receives clutch switch signal 2 and exhaust brake switch signal 4.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, said structure all should be considered as belonging to protection domain of the present utility model.
Claims (1)
1. the control gear of an engine braking, comprise clutch switch (2), exhaust brake switch (4), Yuchai is rail control unit of engine EECU and ignition lock ON gear switch (1) altogether, described Yuchai altogether rail control unit of engine EECU adopts BOSCH EDC7 automatical control system, it is characterized in that: described clutch switch (2) is connected with action conversion double-contact relay (3) by signaling line, one end of described action conversion double-contact relay (3) normally opened contact is connected with one end of exhaust brake switch (4) by signaling line, its the other end is connected on the pin 4 of the common rail control unit of engine EECU in Yuchai, the other end of described exhaust brake switch (4) is connected on the pin one of the common rail control unit of engine EECU in Yuchai, one end of described action conversion double-contact relay (3) normally-closed contact is connected on the pin 3 of the common rail control unit of engine EECU in Yuchai by signaling line, its the other end is connected on the pin 4 of the common rail control unit of engine EECU in Yuchai.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320536479.1U CN203532061U (en) | 2013-08-30 | 2013-08-30 | Control device for engine braking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320536479.1U CN203532061U (en) | 2013-08-30 | 2013-08-30 | Control device for engine braking |
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| Publication Number | Publication Date |
|---|---|
| CN203532061U true CN203532061U (en) | 2014-04-09 |
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| CN201320536479.1U Expired - Lifetime CN203532061U (en) | 2013-08-30 | 2013-08-30 | Control device for engine braking |
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| CN (1) | CN203532061U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437893A (en) * | 2013-08-30 | 2013-12-11 | 东风商用车有限公司 | Control device for engine braking |
| CN104153892A (en) * | 2014-05-16 | 2014-11-19 | 玉柴联合动力股份有限公司 | Integrated diesel engine capable of braking inside cylinder forced by external controller |
| CN106870178A (en) * | 2015-12-14 | 2017-06-20 | 现代自动车株式会社 | Gradual braking device and its control method |
| CN107816388A (en) * | 2017-10-18 | 2018-03-20 | 贵州凯星液力传动机械有限公司 | A kind of control method for engine exhaust and brake lockup clutch |
-
2013
- 2013-08-30 CN CN201320536479.1U patent/CN203532061U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437893A (en) * | 2013-08-30 | 2013-12-11 | 东风商用车有限公司 | Control device for engine braking |
| CN104153892A (en) * | 2014-05-16 | 2014-11-19 | 玉柴联合动力股份有限公司 | Integrated diesel engine capable of braking inside cylinder forced by external controller |
| CN104153892B (en) * | 2014-05-16 | 2017-05-31 | 玉柴联合动力股份有限公司 | A kind of integrated diesel machine by peripheral control unit pressure cylinder inside brake |
| CN106870178A (en) * | 2015-12-14 | 2017-06-20 | 现代自动车株式会社 | Gradual braking device and its control method |
| CN106870178B (en) * | 2015-12-14 | 2021-04-30 | 现代自动车株式会社 | Braking force control device and control method thereof |
| CN107816388A (en) * | 2017-10-18 | 2018-03-20 | 贵州凯星液力传动机械有限公司 | A kind of control method for engine exhaust and brake lockup clutch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140409 Effective date of abandoning: 20151223 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |