CN108223775A - The anti-stall control system of emergency brake of vehicle and functional module construction - Google Patents
The anti-stall control system of emergency brake of vehicle and functional module construction Download PDFInfo
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- CN108223775A CN108223775A CN201810010217.9A CN201810010217A CN108223775A CN 108223775 A CN108223775 A CN 108223775A CN 201810010217 A CN201810010217 A CN 201810010217A CN 108223775 A CN108223775 A CN 108223775A
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- clutch
- advance
- engine speed
- separation
- control unit
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/74—Inputs being a function of engine parameters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/18—Preventing unintentional or unsafe shift, e.g. preventing manual shift from highest gear to reverse gear
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
The invention discloses a kind of anti-stall control system of emergency brake of vehicle and functional module constructions, including transmission control unit TCU, after emergency brake of vehicle, transmission control unit TCU will detach clutch and be divided into pre-separation clutch and be kept completely separate two step of clutch, first, transmission control unit TCU determines pre-separation clutch opportunity according to engine speed slope and brake, clutch is completely combined position from clutch in advance and is separated to clutch point position in advance, then, clutch opportunity is kept completely separate further according to the decision of engine speed slope, from clutch, a point position is initially separated clutch in advance, this invention ensures that there is time enough to be kept completely separate clutch, engine is avoided to stop working.
Description
Technical field
The present invention relates to the anti-stall fields of emergency brake of vehicle, and in particular to a kind of anti-stall control of emergency brake of vehicle
System and functional module construction.
Background technology
For cost consideration, the brake switch assembled on current most of vehicle is all numeric type, as long as stopping
Vehicle is stepped on, and brake signal is all 1, and indistinguishable step on again still gently touches on the brake, and therefore, applicant proposed braked in vehicle
In the case of, it is still gently touched on the brake, and determine the scheme on clutch separation opportunity to identify to step on again using engine speed slope.
In the case of emergency brake of vehicle, due to clutch executive system physical characteristic (such as：Response time most performs speed soon
Deng) limitation, if just allowing clutch complete from clutch according to the clutch separation opportunity that engine speed slope calculates
Binding site is initially separated, it is possible to and clutch separation occur, that engine is caused to be dragged not in time is flame-out, after engine misses, vehicle
It is in stays, also without braking effect, seriously affect the safety of driver and passenger.
Invention content
In view of the deficiencies of the prior art, it is an object of the present invention to provide a kind of anti-stall control systems of emergency brake of vehicle
And functional module construction, in the case of solving emergency brake of vehicle, since the limitation of clutch executive system physical characteristic is led
The situation of engine misses that clutch separation is caused to be likely to occur not in time, after emergency brake of vehicle, by separation clutch point
Into pre-separation clutch and two step of clutch is kept completely separate, ensure that time enough detaches clutch, engine is avoided to put out
Fire.
The purpose of the present invention is what is realized using following proposal：A kind of control system of the anti-stall function of emergency brake of vehicle
System, including transmission control unit TCU, the transmission control unit TCU is controlled respectively with clutch actuating mechanism, engine
Unit ECU, key switch, handle position sensor and clutch position sensor on clutch actuating mechanism and
On speed changer vehicle speed sensor electrical connection, the control unit of engine ECU respectively with engine speed sensor,
Brake switch is electrically connected, and the control unit of engine ECU is for the real-time letter for acquiring engine speed sensor, brake switch
Number, and be transferred to transmission control unit TCU, the transmission control unit TCU and acquire key switch and handle position in real time
The signal of the signal of sensor and the clutch position sensor on clutch actuating mechanism and mounted on speed changer
On vehicle speed sensor signal, the transmission control unit TCU is used for according to engine speed, and it is oblique to calculate engine speed
Rate, the transmission control unit TCU are used for according to engine speed, brake signal, key signal, handle position, clutch
Position, speed and engine speed slope judge whether current vehicle condition meets pre-separation clutch condition, all meeting
In the case of pre-separation clutch condition, transmission control unit TCU closed loop locations control clutch actuating mechanism push from
Clutch is divided in advance, and clutch is completely combined position from clutch is separated to clutch point position in advance；The transmission control unit
TCU is used to judge whether current vehicle condition meets completely according to brake signal, clutch position and engine speed slope
Detach clutch conditions, meet it is all be kept completely separate clutch conditions in the case of, the transmission control unit TCU closed loops
Position control clutch actuating mechanism pushes clutch to be kept completely separate, and by clutch, from clutch, a point position is separated to clutch in advance
Fully disengaged position.
The pre-separation clutch condition is powered on including key, engine is run, handle position is " D " or " R ", works as front
Position for forward gear or reverse gear, brake step on, clutch position signal does not have failure, speed without wrong, clutch actuating motor
Not low (speed is more than preset vehicle speed threshold value), engine speed slope are less than or equal to engine speed slope threshold values L1, in advance
It establishes the relationship of engine speed slope threshold values L1 and target gear and is stored in transmission control unit TCU, it is pre- performing
When separation clutch opportunity judges, transmission control unit TCU obtains corresponding engine speed slope threshold values according to target gear
L1。
It is described to be kept completely separate (stepping on brake again) in the case that clutch conditions are in emergency braking including vehicle, divide in advance
Clutch has been completed and engine speed slope is less than or equal to engine speed slope threshold values L2, is established engine in advance and is turned
The relationship of fast slope threshold values L2 and target gear is simultaneously stored in transmission control unit TCU, and clutch is kept completely separate in execution
When opportunity judges, transmission control unit TCU obtains corresponding engine speed slope threshold values L2 according to target gear.
Engine speed slope threshold values L1 ratios in pre-separation clutch opportunity Rule of judgment are kept completely separate clutch opportunity and sentence
Engine speed slope threshold values L2 in broken strip part is big.
Establish clutch point position deviation P in advance in advancecompensationWith the relationship of target gear and being stored in transmission control
In unit TCU, clutch divides position P in advancepreopen=clutch divides position deviation P in advancecompensation+ clutch half hitch chalaza
Ptouch, when performing pre-separation clutch, transmission control unit TCU obtains corresponding clutch according to target gear and divides position in advance
Deviation Pcompensation, then calculate corresponding clutch point position P in advancepreopen。
Whether the transmission control unit TCU divides complete in advance according to clutch position sensor value real-time judge clutch
Into if before the deadline, clutch position reaches clutch and point position and is kept for certain time in advance, then pre-separation is closed
Device success, otherwise, the failure of pre-separation clutch；The transmission control unit TCU according to clutch position judgement be kept completely separate from
Whether clutch is completed, if before the deadline, clutch position reaches clutch fully disengaged position and keeps a timing
Between, then clutch success is kept completely separate, otherwise, is kept completely separate clutch failure.It is held in the anti-stall step of emergency brake of vehicle
During row, if being unsuccessfully due to caused by clutch executive system failure, then transmission control unit TCU can forbid this
Function just allows the function until next key powers on；If it is unsuccessfully the change due to driver intention, then speed changer control
Unit TCU processed can enter the anti-stall function of emergency brake of vehicle again.
A kind of functional module construction of the anti-stall control of emergency brake of vehicle, it is described including Signal sampling and processing module
Signal sampling and processing module is used to acquire engine speed, brake signal, key signal, handle position, clutch position, vehicle
Speed, and according to engine speed, calculate engine speed slope；
Pre-separation clutch opportunity judgment module, the pre-separation clutch opportunity judgment module be used for according to engine speed,
Brake signal, key signal, handle position, clutch position, speed and engine speed slope judge current vehicle condition
Whether pre-separation clutch condition is met, in the case where meeting all pre-separation clutch conditions, the control of triggering first clutch position
Molding block；
First clutch position control module, the first clutch position control module is for when receiving pre-separation clutch
The triggering of machine judgment module, control clutch actuating mechanism push clutch to divide in advance, clutch are completely combined position from clutch
It puts and is separated to clutch point position in advance；
Clutch opportunity judgment module is kept completely separate, the clutch opportunity judgment module that is kept completely separate is for according to brake
Signal, clutch position and engine speed slope judge whether current vehicle condition meets and be kept completely separate clutch conditions,
Meet it is all be kept completely separate clutch conditions in the case of, trigger second clutch position control module；
Second clutch position control module, the second clutch position control module are kept completely separate clutch for receiving
The triggering of device opportunity judgment module, control clutch actuating mechanism pushes clutch to be kept completely separate, and clutch is pre- from clutch
Point position is separated to clutch fully disengaged position.
The pre-separation clutch condition is powered on including key, engine is run, handle position is " D " or " R ", works as front
Position for forward gear or reverse gear, brake step on, clutch position signal does not have failure, speed without wrong, clutch actuating motor
Not low (speed is more than preset vehicle speed threshold value), engine speed slope are less than or equal to engine speed slope threshold values L1, in advance
It establishes the relationship of engine speed slope threshold values L1 and target gear or current shift and is stored in memory module, it is pre- performing
When separation clutch opportunity judges, pre-separation clutch opportunity judgment module obtains corresponding start according to target gear or current shift
Machine rotating speed slope threshold values L1, it is described be kept completely separate clutch conditions be in emergency braking including vehicle in the case of, pre-separation closes
Device has been completed and engine speed slope is less than or equal to engine speed slope threshold values L2, and it is oblique to establish engine speed in advance
The relationship of rate threshold values L2 and target gear or current shift is simultaneously stored in memory module, and clutch opportunity is kept completely separate in execution
During judgement, it is oblique according to target gear or the corresponding engine speed of current shift acquisition to be kept completely separate clutch opportunity judgment module
Rate threshold values L2.
Establish clutch point position deviation P in advance in advancecompensationWith the relationship of target gear or current shift and being stored in
In memory module, clutch divides position P in advancepreopen=clutch divides position deviation P in advancecompensation+ clutch half hitch chalaza
Ptouch, when performing pre-separation clutch, pre-separation clutch opportunity judgment module is corresponded to according to target gear or current shift
Clutch divide position deviation P in advancecompensation, then calculate corresponding clutch point position P in advancepreopen。
Target gear refers to the vehicle next gear to be run, for current shift.Target gear is to pass through
What the gearshift line of speed and throttle obtained.Since the dynamic of different gears vehicle when driving is different, if L1, L2,
PcompensationUsing a fixed value, then may result in pre-separation clutch opportunity judges, is kept completely separate clutch opportunity and sentences
Disconnected and clutch divides position inaccurate in advance, so as to cause the anti-stall effect of desired emergency brake of vehicle is unable to reach.
Clutch position control module closed loop location control clutch actuating mechanism push clutch divide in advance, by clutch from
Clutch is completely combined position and is separated to clutch point position in advance, clutch position control module according to clutch position judge from
Whether clutch point is completed in advance, if before the deadline, clutch position sensor value reaches clutch and point position and protects in advance
Hold certain time, then the success of pre-separation clutch, otherwise it is assumed that pre-separation clutch fails；Clutch position control module closed loop
Position control clutch actuating mechanism pushes clutch to be kept completely separate, and by clutch, from clutch, a point position is separated to clutch in advance
Fully disengaged position, clutch position control module is kept completely separate according to clutch position sensor value real-time judge clutch is
No completion, if before the deadline, clutch position sensor value reaches clutch fully disengaged position and keeps certain
Time, then clutch success is kept completely separate, otherwise it is assumed that being kept completely separate clutch failure.
The Signal sampling and processing module, pre-separation clutch opportunity judgment module are kept completely separate the judgement of clutch opportunity
Module and first clutch position control module, the setting of second clutch position control module are arranged at transmission control list
First TCU.
Present invention has the advantage that：The present invention provides a kind of emergency brake of vehicle anti-stall control systems and function
Module frame, including transmission control unit TCU, ECU acquires the signal of engine speed sensor, brake switch in real time, leads to
It crosses CAN lines and is transferred to TCU, meanwhile, TCU can also acquire key switch and handle position sensor signal, mounted on clutch in real time
Clutch position sensor signal in device executing agency, the vehicle speed sensor signal on speed changer.Transmission control
Unit TCU is oblique according to engine speed, brake signal, key signal, handle position, clutch position, speed, engine speed
The signals such as rate judge whether to meet pre-separation clutch condition.In the case where meeting all pre-separation clutch conditions, TCU closed loops position
Control clutch actuating mechanism action is put, clutch actuating mechanism pushes clutch to divide in advance, and TCU is according to clutch position sensor
Whether value real-time judge pre-separation clutch is completed, and point position and is kept for certain time in advance when clutch position reaches clutch, in advance
Detach clutch success.After the completion of pre-separation clutch, enter and be kept completely separate the judgement of clutch opportunity.If engine speed slope
Less than or equal to engine speed slope threshold values L2, then transmission control unit TCU closed loop locations control clutch performs machine
Structure acts, and clutch actuating mechanism pushes clutch separation, when clutch position has reached clutch fully disengaged position and protects
It holds certain time, is then kept completely separate clutch success, the anti-stall function of emergency brake of vehicle performs completion.With forward gear or reverse gear
Vehicle is driven, after reaching certain speed, throttle is unclamped, steps on brake pedal emergency braking.In order to solve emergency brake of vehicle
In the case of flame-out risk, after emergency brake of vehicle, separation clutch is divided into and pre-separation clutch and is kept completely separate clutch
Two steps.First, determine pre-separation clutch opportunity according to the conditions such as engine speed slope and brake, in advance by clutch from
Clutch is completely combined position and is separated to clutch point position in advance；Then, it is kept completely separate further according to the decision of engine speed slope
On clutch opportunity, from clutch, a point position is initially separated clutch in advance, ensure that time enough detaches clutch, has been avoided sending out
Motivation is stopped working.And the present invention still gently touches on the brake according to engine speed slope to identify to step on again, and when determining clutch separation
Machine, under vehicle brake condition, when engine speed slope is less than a threshold value of setting, then it is assumed that driver is hard braking.
Term is explained
Transmission control unit：TCU(Transmission Control Unit)
Control unit of engine：ECU(Engine Control Unit)
Controller local area network：CAN(Controller Aera Network)
Closed loop location control refers to the position control with feedback, in particular to according to physical location and the deviation of target location
The actuating motor duty ratio of output is adjusted, deviation is bigger, and actuating motor duty ratio is bigger, and deviation is smaller, actuating motor duty
Than smaller.
Duty ratio is in a pulse cycle, and conduction time is relative to the ratio shared by total time.
Clutch half hitch chalaza refers to that the power of vehicle output just overcomes the clutch position of vehicle drag.
Clutch fully disengaged position refers to that engine transmits clutch position when thoroughly disconnecting with transmission power.
Description of the drawings
Fig. 1 is the system structure diagram of the present invention；
Fig. 2 is the flow chart of the anti-stall control method of the emergency brake of vehicle of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining the present invention, and is not construed as limiting the claims.
As shown in Figure 1, the control system that a kind of emergency brake of vehicle is anti-stall, described including transmission control unit TCU
Transmission control unit TCU is sensed respectively with clutch actuating mechanism, control unit of engine ECU, key switch, handle position
Device and the clutch position sensor on clutch actuating mechanism and the vehicle speed sensor electricity on speed changer
Connection, the control unit of engine ECU are electrically connected respectively with engine speed sensor, brake switch, the engine control
Unit ECU processed passes through CAN lines and is transferred to speed changer control for acquiring engine speed sensor, brake switch signal in real time
Unit TCU processed, the transmission control unit TCU acquire signal and the installation of key switch and handle position sensor in real time
The signal of the signal of clutch position sensor on clutch actuating mechanism and the vehicle speed sensor on speed changer,
The transmission control unit TCU is used to, according to engine speed, calculate engine speed slope, the transmission control unit
TCU is used to be turned according to engine speed, brake signal, key signal, handle position, clutch position, speed and engine
Fast slope judges whether current vehicle condition meets pre-separation clutch condition, in the situation for meeting all pre-separation clutch conditions
Under, transmission control unit TCU closed loop locations control clutch actuating mechanism pushes clutch to divide in advance, by clutch from from
Clutch is completely combined position and is separated to clutch point position in advance；The transmission control unit TCU be used for according to brake signal, from
Clutch position and engine speed slope judge whether current vehicle condition meets and are kept completely separate clutch conditions, meeting
In the case of being kept completely separate clutch conditions, the transmission control unit TCU closed loop locations control clutch actuating mechanism
Clutch is pushed to be kept completely separate, a point position is separated to clutch fully disengaged position in advance from clutch by clutch.
TCU takes engine speed differential to obtain engine speed slope according to engine speed.Every five of the present embodiment
Period (a cycle refers to 10 milliseconds) calculates an engine speed slope, and certainly, specific calculating cycle is according to actual conditions
Adjustment.
The pre-separation clutch condition is powered on including key, engine is run, handle position is " D " or " R ", works as front
Position for forward gear or reverse gear, brake step on, clutch position signal does not have failure, speed without wrong, clutch actuating motor
Not low (speed is more than preset vehicle speed threshold value), engine speed slope are less than or equal to engine speed slope threshold values L1, in advance
It establishes the relationship of engine speed slope threshold values L1 and target gear and is stored in transmission control unit TCU, it is pre- performing
When separation clutch opportunity judges, transmission control unit TCU obtains corresponding engine speed slope threshold values according to target gear
L1。
It is described be kept completely separate clutch conditions be in emergency braking including vehicle in the case of, pre-separation clutch completed with
And engine speed slope be less than or equal to engine speed slope threshold values L2, establish in advance engine speed slope threshold values L2 with
The relationship of target gear is simultaneously stored in transmission control unit TCU, when execution is kept completely separate clutch opportunity and judges, speed change
Device control unit TCU obtains corresponding engine speed slope threshold values L2 according to target gear.
Establish clutch point position deviation P in advance in advancecompensationWith the relationship of target gear and being stored in transmission control
In unit TCU, clutch divides position P in advancepreopen=clutch divides position deviation P in advancecompensation+ clutch half hitch chalaza
Ptouch, when performing pre-separation clutch, transmission control unit TCU obtains corresponding clutch according to target gear and divides position in advance
Deviation Pcompensation, then calculate corresponding clutch point position P in advancepreopen。
The transmission control unit TCU judges whether pre-separation clutch is completed according to clutch position, if providing
Time in, clutch position reaches clutch and point position and is kept for certain time in advance, then the success of pre-separation clutch, otherwise,
Pre-separation clutch fails, and the transmission control unit TCU is kept completely separate whether clutch is completed according to clutch position judgement,
If before the deadline, clutch position reaches clutch fully disengaged position and is kept for certain time, then divides completely
Otherwise luxuriant clutch success, is kept completely separate clutch failure.In the anti-stall step implementation procedure of emergency brake of vehicle, if
It is unsuccessfully due to caused by clutch executive system failure, then transmission control unit TCU can forbid the function, until next time
Key, which powers on, just allows the function；If it is unsuccessfully the change due to driver intention, then transmission control unit TCU again can
Into the anti-stall function of emergency brake of vehicle.
A kind of functional module construction of the anti-stall control of emergency brake of vehicle, it is described including Signal sampling and processing module
Signal sampling and processing module is used to acquire engine speed, brake signal, key signal, handle position, clutch position, vehicle
Speed, and according to engine speed, calculate engine speed slope；
Pre-separation clutch opportunity judgment module, the pre-separation clutch opportunity judgment module be used for according to engine speed,
Brake signal, key signal, handle position, clutch position, speed and engine speed slope judge current vehicle condition
Whether pre-separation clutch condition is met, in the case where meeting all pre-separation clutch conditions, the control of triggering first clutch position
Molding block；
First clutch position control module, the first clutch position control module is for when receiving pre-separation clutch
The triggering of machine judgment module, control clutch actuating mechanism push clutch to divide in advance, clutch are completely combined position from clutch
It puts and is separated to clutch point position in advance；
Clutch opportunity judgment module is kept completely separate, the clutch opportunity judgment module that is kept completely separate is for according to brake
Signal, clutch position and engine speed slope judge whether current vehicle condition meets and be kept completely separate clutch conditions,
Meet it is all be kept completely separate clutch conditions in the case of, trigger second clutch position control module；
Second clutch position control module, the second clutch position control module are kept completely separate clutch for receiving
The triggering of device opportunity judgment module, control clutch actuating mechanism pushes clutch to be kept completely separate, and clutch is pre- from clutch
Point position is separated to clutch fully disengaged position.
The pre-separation clutch condition is powered on including key, engine is run, handle position is " D " or " R ", works as front
Position for forward gear or reverse gear, brake step on, clutch position signal does not have failure, speed without wrong, clutch actuating motor
Not low (speed is more than preset vehicle speed threshold value), engine speed slope are less than or equal to engine speed slope threshold values L1, in advance
It establishes the relationship of engine speed slope threshold values L1 and target gear and is stored in memory module, when performing pre-separation clutch
When machine judges, pre-separation clutch opportunity judgment module obtains corresponding engine speed slope threshold values L1, institute according to target gear
State be kept completely separate clutch conditions be in emergency braking including vehicle in the case of, pre-separation clutch completed and engine turn
Fast slope is less than or equal to engine speed slope threshold values L2, establishes engine speed slope threshold values L2 and target gear in advance
Relationship is simultaneously stored in memory module, when execution is kept completely separate clutch opportunity and judges, is kept completely separate the judgement of clutch opportunity
Module obtains corresponding engine speed slope threshold values L2 according to target gear.
Establish clutch point position deviation P in advance in advancecompensationWith the relationship of target gear and being stored in memory module
Interior, clutch divides position P in advancepreopen=clutch divides position deviation P in advancecompensation+ clutch half hitch chalaza Ptouch, holding
During row pre-separation clutch, pre-separation clutch opportunity judgment module obtains corresponding clutch according to target gear and divides position deviation in advance
Pcompensation, then calculate corresponding clutch point position P in advancepreopen。
Clutch position control module closed loop location control clutch actuating mechanism push clutch divide in advance, by clutch from
Clutch is completely combined position and is separated to clutch point position in advance, and clutch position control module judges pre- according to clutch position
Whether separation clutch is completed, if before the deadline, clutch position reaches clutch point position and one timing of holding in advance
Between, then the success of pre-separation clutch, otherwise, the failure of pre-separation clutch；Clutch position control module closed loop location controls clutch
Device executing agency pushes clutch to be kept completely separate, and by clutch, from clutch, a point position is separated to clutch and is kept completely separate position in advance
It puts, clutch position control module is kept completely separate whether clutch is completed according to clutch position judgement, if when defined
In, clutch position reaches clutch fully disengaged position and is kept for certain time, then clutch success is kept completely separate, it is no
Then it is kept completely separate clutch failure.
The Signal sampling and processing module, pre-separation clutch opportunity judgment module are kept completely separate the judgement of clutch opportunity
Module and first clutch position control module, the setting of second clutch position control module are arranged at transmission control list
First TCU.
As shown in Fig. 2, the control method that a kind of emergency brake of vehicle is anti-stall, includes the following steps：
The first step：Car key powers on, start engine, vehicle with reverse gear or forward gear travel；
Second step：Pre-separation clutch opportunity judges, judges pre-separation clutch opportunity according to the following conditions：
A) key powers on；
B) engine is run；
C) handle position is " D " or " R "；
D) current shift for forward gear or is reversed gear；
E) clutch position signal does not have mistake；
F) clutch actuating motor does not have failure；
G) brake is stepped on；
H) speed it is not low (speed be more than setting speed threshold value, if speed threshold value is set as 5 kilometers/hour, speed threshold value
It to be determined by the calibration of vehicle, be not limited to 5 kilometers/hour).Due to vehicle dynamic when speed is relatively low, cause to calculate
Emergency brake of vehicle anti-stall opportunity be not allowed.
I) engine speed slope is less than or equal to engine speed slope threshold values L1 (rev/min)；
It establishes the relationship (i.e. bivariate table 1) of engine speed slope threshold values L1 and target gear in advance and is stored in speed changer
In control unit TCU, when performing pre-separation clutch opportunity judgment step, transmission control unit TCU is looked into according to target gear
Bivariate table 1 obtains corresponding engine speed slope threshold values L1, that is to say, that in emergency brake of vehicle, each gear
The engine speed slope threshold values L1 of pre-separation clutch can be different.
The engine speed slope threshold values L1 of the present embodiment and the relationship of target gear are determined by the calibration of vehicle,
Make pre-separation clutch opportunity more accurate.If the pre- timesharing machine of clutch is too early, the clutch slipping time can be increased, reduce clutch
Service life；Too late, clutch can be caused to be kept completely separate leads to engine misses to the pre- timesharing machine of clutch not in time.The present embodiment
The engine speed slope threshold values L1 and the relationship (i.e. bivariate table 1) of target gear established in advance is as shown in table 1：
| Target gear | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| L1(rpm) | -40 | -40 | -45 | -50 | -50 | -50 | -50 | -40 |
Table 1
Such as：Target gear is 3 gears, then tabling look-up 1 obtains engine speed slope threshold value L1 as -45.
The present invention can increase pre-separation clutch condition according to matching vehicle actual conditions, be not limited only to above-mentioned condition.
If meet above-mentioned pre-separation clutch all conditions, then jump to third step, otherwise continue to execute pre-separation conjunction
Device opportunity judgment step.
Third walks：Pre-separation clutch：TCU closed loop locations control pre-separation clutch divides position P to clutch in advancepreopen, such as
For fruit within the defined time (such as 1 second), clutch position reaches clutch point position P in advancepreopenAnd kept for certain time (such as 30
Millisecond) time, then the success of pre-separation clutch jumps to the 4th step, and otherwise pre-separation clutch fails, and jumps to the 6th step.
Establish clutch point position deviation P in advance in advancecompensationWith the relationship of target gear and being stored in transmission control
In unit TCU, clutch divides position P in advancepreopen=clutch divides position deviation P in advancecompensation+ clutch half hitch chalaza
Ptouch, when performing pre-separation clutch step, transmission control unit TCU obtains corresponding clutch according to target gear and divides in advance
Position deviation Pcompensation, then calculate corresponding clutch point position P in advancepreopen。
The clutch of the present invention divides position deviation P in advancecompensationRelationship with target gear is true by the calibration of vehicle
Fixed, making clutch, point position is more accurate in advance.If clutch divides position inaccurate in advance, clutch may be caused to be kept completely separate
Not in time, lead to engine misses, it is also possible to cause clutch slipping excessive, reduce clutch service life, while can also
Reduce ride comfort.
The clutch that the present embodiment is established in advance point position deviation P in advancecompensationIt is (i.e. two-dimentional with the relationship of target gear
Table 2) as shown in table 2：
| Target gear | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Pcompensation(mV) | 50 | 55 | 60 | 70 | 70 | 70 | 70 | 50 |
Table 2
Such as：Target gear is 3 gears, then tabling look-up 3 obtains clutch point position deviation P in advancecompensationIt is 60.
4th step：It is entered after the completion of pre-separation clutch and is kept completely separate the judgement of clutch opportunity：If vehicle is in urgent
Under brake condition i.e. brake step on, and engine speed slope be less than or equal to engine speed slope threshold values L2 (turn/
Minute), then the 5th step is jumped to, otherwise continues to execute the step.
It establishes the relationship (i.e. bivariate table 3) of engine speed slope threshold values L2 and target gear in advance and is stored in speed changer
In control unit TCU, when execution is kept completely separate clutch opportunity judgment step, transmission control unit TCU is according to targeted gear
Position looks into bivariate table 3 and obtains corresponding engine speed slope threshold values L2, that is to say, that each to keep off in emergency brake of vehicle
The engine speed slope threshold values L2 for being kept completely separate clutch of position can be different.
The engine speed slope threshold values L2 of the present invention and the relationship of target gear are determined by the calibration of vehicle, are made
It is more accurate that clutch is kept completely separate opportunity.It can cause vehicle that can not drag work using engine is counter too early if clutch is kept completely separate
For slowing down, clutch, which was kept completely separate party, causes clutch separation to lead to engine misses not in time.The present embodiment is prior
The engine speed slope threshold values L2 of foundation and the relationship (i.e. bivariate table 3) of target gear are as shown in table 3：
| Target gear | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| L2(rpm) | -80 | -80 | -90 | -100 | -100 | -100 | -100 | -80 |
Table 3
Such as：Target gear is 3 gears, then tabling look-up 3 obtains engine speed slope L2 as -90.
5th step：It is kept completely separate clutch：TCU closed loop locations control clutch separation to clutch fully disengaged position,
If within the defined time (such as 2 seconds), clutch position reaches clutch fully disengaged position and is kept for certain time (such as 50
Millisecond), then clutch success is kept completely separate, jumps to the 7th step, clutch failure is otherwise kept completely separate, jumps to the 6th
Step.
6) failure：In the anti-stall step implementation procedure of emergency brake of vehicle, if being unsuccessfully since clutch performs system
Caused by failure of uniting, then transmission control unit TCU can forbid the function, just allow the function until next key powers on；
If it is unsuccessfully the change due to driver intention, then jump to the first step.
7) success：In the case where driver intention changes, transmission control unit TCU can jump to the first step again.
Pre-separation clutch opportunity during the anti-stall function control of emergency brake of vehicle of the present invention judges and pre-separation is closed
Device is particularly important, it can effectively solve to lead to clutch separation due to the limitation of clutch executive system physical characteristic
Cause engine misses problem not in time.
It is the detailed description to the technical program above, it should be appreciated that due to the limitation and technical solution of word
Diversity, those skilled in the art is by the word of the technical program, grammer or other equivalent replacement, equally can
Realize the technical program, therefore, such replacement should all be considered as within the protection domain of the application.
Claims (10)
1. a kind of anti-stall control system of emergency brake of vehicle, it is characterised in that：It is described including transmission control unit TCU
Transmission control unit TCU is sensed respectively with clutch actuating mechanism, control unit of engine ECU, key switch, handle position
Device and the clutch position sensor on clutch actuating mechanism and the vehicle speed sensor electricity on speed changer
Connection, the control unit of engine ECU are electrically connected respectively with engine speed sensor, brake switch, the engine control
Unit ECU processed is transferred to transmission control unit TCU for acquiring engine speed sensor, brake switch signal in real time,
The transmission control unit TCU acquires the signal of key switch and handle position sensor and is held mounted on clutch in real time
The signal of the signal of clutch position sensor in row mechanism and the vehicle speed sensor on speed changer, the speed changer
Control unit TCU is used for according to engine speed, calculates engine speed slope, and the transmission control unit TCU is used for root
Judge according to engine speed, brake signal, key signal, handle position, clutch position, speed and engine speed slope
Whether current vehicle condition meets pre-separation clutch condition, in the case where meeting all pre-separation clutch conditions, the speed change
Device control unit TCU closed loop locations control clutch actuating mechanism pushes clutch to divide in advance, and clutch is tied completely from clutch
It closes position and is separated to clutch point position in advance；The transmission control unit TCU be used for according to brake signal, clutch position with
And engine speed slope judges whether current vehicle condition meets and is kept completely separate clutch conditions, is meeting all be kept completely separate
In the case of clutch conditions, the transmission control unit TCU closed loop locations control clutch actuating mechanism pushes clutch
It is kept completely separate, by clutch, from clutch, a point position is separated to clutch fully disengaged position in advance.
2. system according to claim 1, it is characterised in that：The pre-separation clutch condition is powered on including key, is started
Machine operation, handle position is " D " or " R ", current shift is forward gear or reverse gear, brake step on, clutch position signal does not have
Wrong, clutch actuating motor does not have the failure, speed not low (speed be more than preset vehicle speed threshold value), engine speed slope small
In or equal to engine speed slope threshold values L1, engine speed slope threshold values L1 and target gear or current shift are established in advance
Relationship and be stored in transmission control unit TCU, perform pre-separation clutch opportunity judge when, transmission control unit
TCU obtains corresponding engine speed slope threshold values L1 according to target gear or current shift；It is described to be kept completely separate clutch item
Part be in emergency braking including vehicle in the case of, pre-separation clutch completed and engine speed slope be less than or equal to hair
Motivation rotating speed slope threshold values L2 establishes engine speed slope threshold values L2 and the relationship of target gear or current shift and deposits in advance
Storage is in transmission control unit TCU, when execution is kept completely separate clutch opportunity and judges, transmission control unit TCU according to
Target gear or current shift obtain corresponding engine speed slope threshold values L2.
3. system according to claim 2, it is characterised in that：Engine speed in pre-separation clutch opportunity Rule of judgment
The engine speed slope threshold values L2 that slope threshold values L1 ratios are kept completely separate in clutch opportunity Rule of judgment is big.
4. system according to claim 1, it is characterised in that：Establish clutch point position deviation P in advance in advancecompensation
With the relationship of target gear or current shift and being stored in transmission control unit TCU, clutch divides position P in advancepreopen=
Clutch divides position deviation P in advancecompensation+ clutch half hitch chalaza Ptouch, when performing pre-separation clutch, transmission control
Unit TCU obtains corresponding clutch according to target gear or current shift and divides position deviation P in advancecompensation, then calculate
Corresponding clutch divides position P in advancepreopen。
5. system according to claim 1, it is characterised in that：The transmission control unit TCU is according to clutch position
Judge whether pre-separation clutch is completed, if before the deadline, clutch position reaches clutch and point position and keeps in advance
Certain time, then the success of pre-separation clutch, otherwise, the failure of pre-separation clutch, the transmission control unit TCU is according to clutch
Device position real-time judge is kept completely separate whether clutch is completed, if before the deadline, clutch position reaches clutch
Fully disengaged position is simultaneously kept for certain time, then and clutch success is kept completely separate, otherwise, is kept completely separate clutch failure, when
In the case of occurring failure or driver's change driving intention in the anti-stall function implementation procedure of emergency brake of vehicle, speed changer
Control unit TCU will exit the execution of the anti-stall function of emergency brake of vehicle.
6. a kind of functional module construction of the anti-stall control of emergency brake of vehicle, it is characterised in that：Including signal acquisition process mould
Block, the signal acquisition box processing module are used to acquire engine speed, brake signal, key signal, handle position, clutch
Position, speed, and according to engine speed, calculate engine speed slope；
Pre-separation clutch opportunity judgment module, the pre-separation clutch opportunity judgment module are used for according to engine speed, brake
Whether signal, key signal, handle position, clutch position, speed and engine speed slope judge current vehicle condition
Meet pre-separation clutch condition, in the case where meeting all pre-separation clutch conditions, triggering first clutch position control mould
Block；
First clutch position control module, the first clutch position control module are sentenced for receiving pre-separation clutch opportunity
The triggering of disconnected module, control clutch actuating mechanism push clutch to divide in advance, and clutch is completely combined position point from clutch
Divide position in advance to clutch；
Clutch opportunity judgment module is kept completely separate, it is described to be kept completely separate clutch opportunity judgment module for believing according to brake
Number, clutch position and engine speed slope judge whether current vehicle condition meets and be kept completely separate clutch conditions,
Meet it is all be kept completely separate clutch conditions in the case of, trigger second clutch position control module；
Second clutch position control module, when the second clutch position control module is kept completely separate clutch for receiving
The triggering of machine judgment module, control clutch actuating mechanism push clutch to be kept completely separate, divide clutch to position in advance from clutch
It puts and is separated to clutch fully disengaged position.
7. functional module construction according to claim 6, it is characterised in that：The pre-separation clutch condition is included on the key
Electricity, engine operation, handle position is " D " or " R ", current shift is forward gear or reverse gear, brake step on, clutch position
Signal does not have that failure, speed be low, engine speed slope turns less than or equal to engine without mistake, clutch actuating motor
Fast slope threshold values L1 establishes engine speed slope threshold values L1 and the relationship of target gear or current shift and is stored in advance
It stores up in module, when judging on execution pre-separation clutch opportunity, pre-separation clutch opportunity judgment module is according to target gear or currently
Gear obtains corresponding engine speed slope threshold values L1, and the clutch conditions that are kept completely separate are in emergency braking including vehicle
In the case of, pre-separation clutch completed and engine speed slope be more than engine speed slope threshold values L2, in advance establish
The relationship of engine speed slope threshold values L2 and target gear or current shift is simultaneously stored in memory module, is divided completely performing
When luxuriant clutch opportunity judges, it is corresponding according to target gear or current shift acquisition to be kept completely separate clutch opportunity judgment module
Engine speed slope threshold values L2, the engine speed slope threshold values L1 ratios in pre-separation clutch opportunity Rule of judgment are kept completely separate
Engine speed slope threshold values L2 in clutch opportunity Rule of judgment is small.
8. functional module construction according to claim 6, it is characterised in that：Establish clutch point position deviation in advance in advance
PcompensationWith the relationship of target gear or current shift and being stored in memory module, clutch divides position P in advancepreopen=
Clutch divides position deviation P in advancecompensation+ clutch half hitch chalaza Ptouch, when performing pre-separation clutch, pre-separation clutch
Opportunity judgment module obtains corresponding clutch according to target gear or current shift and divides position deviation P in advancecompensation, then
Calculate corresponding clutch point position P in advancepreopen。
9. functional module construction according to claim 6, it is characterised in that：Clutch position control module closed loop location control
Clutch actuating mechanism processed pushes clutch to divide in advance, and clutch is completely combined position from clutch is separated to clutch point position in advance
It puts, whether clutch position control module is divided in advance according to clutch position sensor value real-time judge clutch completes, if
In the defined time, clutch position sensor value reaches clutch and point position and is kept for certain time in advance, then pre-separation is closed
Device success, otherwise, the failure of pre-separation clutch；Clutch position control module closed loop location control clutch actuating mechanism push from
Clutch is kept completely separate, and by clutch, from clutch, a point position is separated to clutch fully disengaged position, clutch position control in advance
Module is kept completely separate whether clutch is completed according to clutch position sensor value real-time judge, if before the deadline,
Clutch position reaches clutch fully disengaged position and is kept for certain time, then clutch success is kept completely separate, it is otherwise, complete
Fully separating clutch failure.
10. functional module construction according to claim 6, it is characterised in that：The Signal sampling and processing module is divided in advance
Clutch opportunity judgment module is kept completely separate clutch opportunity judgment module and first clutch position control module, second
The setting of clutch position control module is arranged at transmission control unit TCU.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810010217.9A CN108223775B (en) | 2018-01-05 | 2018-01-05 | Vehicle emergency braking flameout prevention control system and functional module framework |
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|---|---|---|---|
| CN201810010217.9A CN108223775B (en) | 2018-01-05 | 2018-01-05 | Vehicle emergency braking flameout prevention control system and functional module framework |
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| CN110469598A (en) * | 2019-08-21 | 2019-11-19 | 安徽江淮汽车集团股份有限公司 | Clutch pressure control method, apparatus, electronic equipment and storage medium |
| CN110816515A (en) * | 2019-09-30 | 2020-02-21 | 潍柴动力股份有限公司 | Vehicle flameout prevention control method and vehicle flameout prevention control device |
| CN112572396A (en) * | 2020-12-11 | 2021-03-30 | 潍柴动力股份有限公司 | Manual transmission vehicle AEBS control method, device and system |
| CN112727611A (en) * | 2020-12-23 | 2021-04-30 | 重庆青山工业有限责任公司 | Control method for preventing engine stall of automobile traction control system |
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