CN106274885B - Vehicle start-up and shut-down control method - Google Patents
Vehicle start-up and shut-down control method Download PDFInfo
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- CN106274885B CN106274885B CN201610796444.XA CN201610796444A CN106274885B CN 106274885 B CN106274885 B CN 106274885B CN 201610796444 A CN201610796444 A CN 201610796444A CN 106274885 B CN106274885 B CN 106274885B
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- idle stop
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
- B60W10/11—Stepped gearings
- B60W10/113—Stepped gearings with two input flow paths, e.g. double clutch transmission selection of one of the torque flow paths by the corresponding input clutch
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18018—Start-stop drive, e.g. in a traffic jam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/02—Clutches
- B60W2510/0208—Clutch engagement state, e.g. engaged or disengaged
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2540/00—Input parameters relating to occupants
- B60W2540/10—Accelerator pedal position
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2540/00—Input parameters relating to occupants
- B60W2540/12—Brake pedal position
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The present invention provides a kind of vehicle start-up and shut-down control method; vehicle running state judgement is carried out by the vehicles correlated condition such as engine, gear signal first; if in idle stop condition; the shutdown demand then sent out according to engine; gearbox is controlled to carry out gear, clutch control so that gearbox, which is in, prepares shutdown status so that engine to be coordinated to shut down；After shutdown, when driver has driving intention, gearbox will carry out the relevant controls such as clutch, gear to coordinate engine start; it allows the vehicle to normally start to walk, travel; can safe and reliable assisted engine complete start-up and shut-down control, be conducive to save oil consumption, improve fuel economy.
Description
Technical field
The present invention relates to control technology field more particularly to a kind of vehicle start-up and shut-down control methods.
Background technology
As current country is higher and higher to automobile fuel consumption requirement, major main engine plants are directed to complete-vehicle oil consumption economy problems
Improvement constantly is being optimized, is mainly being improved by body lightening and various power-saving technologies, wherein power-saving technology
Including start-up and shut-down control, ECO patterns, hybrid power, electronic oil pump, electronic power assist steering, specific coatings and efficient engine oil etc.
Deng.Wherein, start-up and shut-down control technology is more and more configured in intelligent automobile.According to the investigation of the existing vehicle in market, configuration
The vehicle of start-up and shut-down control technology can be than the vehicle oil saving about 3%~5% of the technology be configured.
Start-up and shut-down control technology be when vehicle is in engine idle operation situation (such as red light, of short duration parking etc.),
It meets some requirements down, start-stop control system will turn off engine, and when starting to walk again, engine quickly starts.Entirely
Operating process makes every effort to not change the normal driving habit of driver, and driver can also be closed by start-stop control system main switch
Automatic start-stop control function.Start-up and shut-down control technology makes more environmentally friendly vehicle, more fuel-economizing and service life of aeroengine also can higher.
Dual-clutch transmission is one of current gearbox state-of-the-art in the world, and typical wet-type dual-clutch is certainly
Dynamic gearbox is mainly made of hardware such as oil pump, wet-type dual-clutch, electronic control system, hydraulic system and gears.Wet type
Dual-clutch transmission establishes working connection pressure by oil pump rotation, then judges vehicle and change by electronic control system again
Fast case current working status, so as to control the electromagnetism related to clutch control of the shift control associated solenoid valve in hydraulic system
Valve realizes the shifting of gearbox and clutch separation, combination, is finally reached good vehicle cornering ability.
On the other hand, according to for having the investigation situation of the vehicle of start-up and shut-down control function, vehicle is commonly provided in the market
Be the dual-clutch transmission with electronic oil pump and the relevant accessory of accumulator start-up and shut-down control.
The corresponding vehicle of wet dual-clutch automatic transmission for being not equipped with the components such as electronic oil pump and accumulator
, how to realize that start-up and shut-down control is a problem to be solved.
Invention content
The present invention provides a kind of vehicle start-up and shut-down control method, to provide for being not equipped with electronic oil pump and accumulator
Wait the technical solution of the start-up and shut-down control of the corresponding vehicle of wet dual-clutch automatic transmission of components.
The present invention provides a kind of vehicle start-up and shut-down control method, including：
Control unit of engine (ECU) sends idle stop request signal to gear box control unit (TCU)；
The TCU carries out idle stop condition judgment, described in satisfaction after the idle stop request signal is received
During idle stop condition, control dual-clutch transmission disengages transmission chain, and after successfully disengagement is detected, sends
Allow idle stop signal to the ECU；
The ECU is after the permission idle stop signal is received, and control engine is shut down, by engine idle stop
Status signal is switched to idle stop state, and engine status signal is switched to shutdown status, and the hair after state is switched
Engine status signal after motivation idle stop status signal and state switching is sent to the TCU；
The TCU is receiving the engine idle stop status signal and the engine shape that the ECU is sent
After state signal, automatic entry condition judgement is carried out, when meeting the automatic entry condition, the double clutch is controlled to become automatically
Fast case is attracted the transmission chain, and automatically activated signal will be forbidden to be switched to the automatic starting state of permission, and state is switched
Afterwards automatically activated signal is forbidden to be sent to the ECU；
The ECU after receiving the state switching that the TCU sends forbid automatically activated signal after, according to oil
The state of door pedal controls the engine to start automatically, controls engine condition using corresponding automatic startup control mode
Signal is switched to starting state, then is switched to operating status, and is detecting engine status signal successful switch to operation
After state, engine idle stop status signal is switched to non-idle stop state.
Further, the idle stop condition may include：
The current shift of dual-clutch transmission is in forward gear or neutral gear；
The oil temperature of the dual-clutch transmission, the current vehicle speed of the vehicle, gas pedal and brake pedal
State meet corresponding preset condition respectively.
Further, after idle stop condition judgment is carried out, the method may also include：
When being unsatisfactory for the idle stop condition, the TCU transmissions forbid stopping signal to the ECU.
Further, the TCU is by obtaining the respective pressure signal of double clutch, and is detecting double clutches
When the respective pressure signal of device is respectively less than predetermined threshold value, it is determined that the dual-clutch transmission successfully disengages the biography
Dynamic chain.
Further, after the idle stop request signal is received, the method may also include the TCU：
For the TCU when detecting that dual-clutch transmission breaks down, transmission forbids stopping signal to described
ECU。
Further, the automatic entry condition may include：
Dual-clutch transmission successfully disengages transmission chain；
The current shift of dual-clutch transmission is in forward gear or neutral gear.
Further, after automatic entry condition judgement is carried out, the method may also include：
When being unsatisfactory for the automatic entry condition, the TCU transmissions forbid automatically activated signal to the ECU.
Further, according to the state of gas pedal, the engine is controlled using corresponding automatic startup control mode
It is automatic to start, it may include：
The ECU detects that in when stepping on state, the engine is controlled certainly using starting control mode for gas pedal
It is dynamic to start；
The ECU detects that in when not stepping on state, the engine is controlled using wriggling control mode for gas pedal
It is automatic to start.
Further, the TCU is receiving the engine idle stop status signal that the ECU sends and described
After engine status signal, the method may also include：
The TCU is detected to break down and be belonged to when detecting that dual-clutch transmission breaks down
When cannot be introduced into the corresponding failure of slope row pattern, transmission forbids automatically activated signal to the ECU；
The TCU is detected to break down and be belonged to when detecting that dual-clutch transmission breaks down
When can enter the corresponding failure of slope row pattern, it is judged as meeting the automatic entry condition, and it is described double to continue to execute control
Clutch automatic gear-box is attracted the operation of the transmission chain.
Vehicle start-up and shut-down control method provided by the invention, provide it is a kind of be applied to be not equipped with electronic oil pump and
The start-up and shut-down control method of the corresponding vehicle of wet dual-clutch automatic transmission of accumulator component passes through engine, gear first
The vehicles correlated condition signals such as position carry out vehicle running state judgement, if in idle stop condition, are sent out according to engine
Shutdown demand, control gearbox carry out gear, clutch control so that gearbox be in prepare shutdown status started with coordinating
Machine is shut down；After shutdown, when driver has driving intention, gearbox will carry out the relevant controls such as clutch, gear to coordinate hair
Motivation starts so that vehicle can normally be started to walk, be travelled, can safe and reliable assisted engine complete start-up and shut-down control, favorably
In saving oil consumption, fuel economy is improved.
Description of the drawings
Fig. 1 is the flow diagram of a kind of vehicle start-up and shut-down control method that the embodiment of the present invention one provides；
Fig. 2 is a kind of sequence diagram of vehicle start-up and shut-down control method provided by Embodiment 2 of the present invention；
Fig. 3 is a kind of flow diagram of drive shift automatic halt control method provided by Embodiment 2 of the present invention；
Fig. 4 is a kind of flow diagram of forward gear automatic starting control method provided by Embodiment 2 of the present invention；
Fig. 5 is a kind of flow diagram of neutral gear automatic halt control method provided by Embodiment 2 of the present invention；
Fig. 6 is a kind of flow diagram of neutral gear automatic starting control method provided by Embodiment 2 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.
Embodiment one
Referring to Fig. 1, a kind of schematic diagram of vehicle start-up and shut-down control method provided for the embodiment of the present invention one.It is of the invention real
The technical solution for applying example is suitable for wet dual-clutch automatic transmission to being not equipped with electronic oil pump and accumulator component
The start-up and shut-down control of corresponding vehicle.
This method includes：
Step 110, control unit of engine (ECU) send idle stop request signal to gear box control unit (TCU).
Step 120, the TCU carry out idle stop condition judgment after the idle stop request signal is received,
When meeting the idle stop condition, control dual-clutch transmission disengages transmission chain, and successfully disengage detecting
Later, sending allows idle stop signal to the ECU.
This step is specifically when TCU is determined and met idle stop condition, performs the preparation of idle stop.
In this step, the idle stop condition may include：
The current shift of dual-clutch transmission is in forward gear or neutral gear；
The oil temperature of the dual-clutch transmission, the current vehicle speed of the vehicle, gas pedal and brake pedal
State meet corresponding preset condition respectively.
It should be noted that the technical solution of the present embodiment can realize that vehicle carries out auto idle speed in forward gear or neutral gear
Shut down control (seeing latter embodiments).
It should be noted gear box control unit (TCU) involved in the technical solution of the embodiment of the present invention and start
Information exchange and coordination between machine control unit (ECU) control, and the interface first between TCU and ECU is defined, wherein
Including at least the definition to allowing idle stop signal.
Illustratively, allow idle stop signal that can be defined as：
0:Do not allow idle stop
1：Allow idle stop
Correspondingly, TCU sends the permission idling for allowing idle stop signal that will be pre-defined to the ECU, specifically TCU
The state of stopping signal, which switches to, allows idle stop (i.e. 1), is then forwarded to the ECU.
Further, after idle stop condition judgment is carried out, the method may also include：
When being unsatisfactory for the idle stop condition, the TCU transmissions forbid stopping signal to the ECU.
Similar, it can also be to stopping signal be forbidden to pre-define.
Specifically, the TCU can be by obtaining the respective pressure signal of double clutch, and detecting double clutches
When the respective pressure signal of device is respectively less than predetermined threshold value (for example, 150kpa), it is determined that the dual-clutch transmission
Success disengages the transmission chain.
Step 130, the ECU are after the permission idle stop signal is received, and control engine is shut down, by engine
Idle stop status signal is switched to idle stop state, and engine status signal is switched to shutdown status, and state is cut
The engine status signal after engine idle stop status signal and state switching after changing is sent to the TCU.
Gear box control unit (TCU) involved in the technical solution of the embodiment of the present invention and control unit of engine (ECU)
Between information exchange and coordinate to control, the interface first between TCU and ECU is defined, and wherein at least includes to starting
The definition of machine idle stop status signal and engine status signal.
Wherein, the state of engine idle stop status signal includes：Non- idle stop state and idle stop state.
Engine status signal may include：Shutdown, startup, operation and failure.
Step 140, the TCU are receiving the engine idle stop status signal that the ECU sends and described
After engine status signal, automatic entry condition judgement is carried out, when meeting the automatic entry condition, controls double clutches
Device automatic gear-box is attracted the transmission chain, and automatically activated signal will be forbidden to be switched to the automatic starting state of permission, and will
Automatically activated signal is forbidden to be sent to the ECU after state switching.
This step is specifically when TCU is determined and met automatic entry condition, performs automatic startup preparation.
In this step, the automatic entry condition includes：
Dual-clutch transmission successfully disengages transmission chain；
The current shift of dual-clutch transmission is in forward gear or neutral gear.
It should be noted that preceding addressed, the technical solution of the present embodiment can realize vehicle forward gear or neutral gear into
Row auto idle speed shuts down control, by this step, the technical solution of the present embodiment can realize vehicle forward gear or neutral gear into
Automatic start after row auto idle speed is shut down controls (seeing latter embodiments).
It should also be noted that, when the interface between TCU and ECU is defined, including at least to forbidding opening automatically
The definition of dynamic signal.
Wherein, the state of automatically activated signal is forbidden to include：Allow automatic starting state and forbid automatic starting state.
Further, after automatic entry condition judgement is carried out, the method may also include：
When being unsatisfactory for the automatic entry condition, the TCU transmissions forbid automatically activated signal to the ECU.
Wherein, due to not switched over to the state for forbidding automatically activated signal, the TCU transmissions are forbidden certainly
Dynamic enabling signal enables to the ECU controls engine to forbid starting automatically to the ECU.
Step 150, the ECU forbid automatically activated signal after the state switching for receiving the TCU transmissions
Afterwards, according to the state of gas pedal, the engine is controlled to start automatically using corresponding automatic startup control mode, control hair
Motivational state signal is switched to starting state, then is switched to operating status, and is detecting that engine status signal successfully cuts
It changes to after operating status, engine idle stop status signal is switched to non-idle stop state.
In this step, engine status signal can first switch to startup and switch to operation again in automatic start-up course；Engine
Idle stop status signal can change to non-idle stop state after engine status signal successful switch to operation, at this time TCU
It can start to control gearbox output torque.
In this step, according to the state of gas pedal, the engine is controlled using corresponding automatic startup control mode
It is automatic to start, it may particularly include：
The ECU detects that in when stepping on state, the engine is controlled certainly using starting control mode for gas pedal
It is dynamic to start；
The ECU detects that in when not stepping on state, the engine is controlled using wriggling control mode for gas pedal
It is automatic to start.
The technical solution of the present embodiment provides a kind of be applied to being not equipped with electronic oil pump and accumulator component
The corresponding vehicle of wet dual-clutch automatic transmission start-up and shut-down control method, pass through the vehicles phase such as engine, gear first
Off status signal carries out vehicle running state judgement, if in idle stop condition, the shutdown demand sent out according to engine,
Gearbox is controlled to carry out gear, clutch control so that gearbox, which is in, prepares shutdown status so that engine to be coordinated to shut down；It shuts down
Afterwards, when driver has driving intention, gearbox will carry out the relevant controls such as clutch, gear to coordinate engine start, make
Vehicle can normally be started to walk, be travelled, can safe and reliable assisted engine complete start-up and shut-down control, be conducive to save oil consumption,
Improve fuel economy.
In said program, after the idle stop request signal is received, the method may also include the TCU：
For the TCU when detecting that dual-clutch transmission breaks down, transmission forbids stopping signal to described
ECU。
Which can stop engine in time and carry out idle stop preparation when detecting that automatic gear-box breaks down
Work.
In said program, the TCU receive the engine idle stop status signal that the ECU sends and
After the engine status signal, the method may also include：
The TCU is detected to break down and be belonged to when detecting that dual-clutch transmission breaks down
When cannot be introduced into the corresponding failure of slope row pattern, transmission forbids automatically activated signal to the ECU；
The TCU is detected to break down and be belonged to when detecting that dual-clutch transmission breaks down
When can enter the corresponding failure of slope row pattern, it is judged as meeting the automatic entry condition, and it is described double to continue to execute control
Clutch automatic gear-box is attracted the operation of the transmission chain.
Which can flexibly be controlled when TCU detects that automatic gear-box breaks down according to the severity of failure
Engine, specifically, when fault degree is less serious, control engine enters slope row pattern, continues to carry out automatic startup standard
Standby, in fault degree seriously to when being not enough to enter limping pattern, suspension engine start automatically and is prepared in time.
Embodiment two
Gear box control unit (TCU) involved in the technical solution of the embodiment of the present invention and control unit of engine (ECU)
Between information exchange and coordinate to control, the interface first between TCU and ECU is defined, as shown in table 1, TCU and ECU
It is related to 8 signals altogether, wherein TCU sends 4 signals to ECU, and ECU sends 4 signals to TCU.Each signal definition is as follows：
1) stopping function disable signal
0:It shuts down enabled
1:Forbid shutting down
2) allow idle stop signal
0:Do not allow idle stop
1：Allow idle stop
Can be by the way that the stopping function is prohibited it should be noted that for forbidding stopping signal in embodiment of the method
The state of stop signal, which switches to, forbids shutdown status (i.e. 1) to obtain or by by the shape of the permission idle stop signal
State, which switches to, does not allow idle stop state (i.e. 0) to obtain.
3) forbid automatically activated signal
0:Allow automatic start
1：Forbid starting automatically
4) transmission chain relay status signal
0:Relay disconnects
1：Relay is attracted
5) engine status signal
0:It shuts down
1：Start
2:Operation
3：Failure
6) engine idle stop status signal
0:Non- idle stop state
1：Idle stop state
7) idle stop request signal
0:Without request
1：Ask autostop
8) TCU is forbidden to control transmission chain relay signal
0:It is not prohibited by
1：Transmission chain relay is forbidden to be attracted
Table 1
With reference to Fig. 2, to the work of vehicle start-up and shut-down control method provided in an embodiment of the present invention in a manner of sequence diagram
Principle illustrates.
As shown in Fig. 2, the entire start-up and shut-down control process of TCU is described with timing diagram approach.
After vehicle meets idle stop state, ECU can totally judge and send out idle stop request signal to TCU；TCU
After receiving the idle stop request signal, idle stop condition judgment is carried out, when meeting the idle stop condition, is then opened
Beginning performs the preparation of idle stop, that is, dual-clutch transmission is controlled to disengage transmission chain；Prepare when TCU completes to shut down
(that is, after detecting successfully disengagement), sending out allows idle stop signal to ECU；Then ECU controls engine to shut down, and to
TCU sends out idle stop status signal (for 1), while engine status signal is switched to shutdown status.
(for 0) after engine speed comes to a complete stop, idle stop status signal can be maintained at 1 state of putting, and TCU is carried out certainly
Dynamic entry condition judges, when meeting the automatic entry condition, TCU need to be maintained at the state for preparing to start during this period, i.e.,
Forbidding TCU control transmission chain relay status as, (for 0), TCU needs that transmission chain relay is kept to be attracted, that is, controls when being not prohibited by
It makes the dual-clutch transmission and is attracted the transmission chain, while TCU needs will forbid automatically activated signal to set to 0 (i.e. not
Forbid starting automatically)；If TCU detects that internal fault or other reasons cause it that cannot maintain to shut down preparation again during this period
State, then TCU needs, which are sent out, forbids automatically activated signal engine can be forbidden to start automatically to ECU, ECU.When ECU judges have
After starting request, and automatic entry condition meets, then triggering is automatic starts；Starter motor can drag engine completion and open again
Dynamic, engine status signal can first switch to startup and switch to operation again in automatic start-up course；Idle stop status signal can be
Engine condition is set to 0 after being switched to operation, and TCU can start to control gearbox output torque at this time.
The embodiment of the present invention includes forward gear (D gears) start-up and shut-down control and neutral gear (N gears) start-up and shut-down control two ways.
Fig. 3 is the flow diagram of drive shift autostop control, when vehicle decelerates to centainly from normal driving process
After speed, if ECU has idle stop demand that can send idle stop request signal to TCU.
After TCU receives the request signal, idle stop condition judgment is carried out, idling can be carried out in the following order and stopped
Machine condition judgment：
1) whether the current shift of dual-clutch transmission is in forward gear, the following 2) judgement of continuation if meeting,
Otherwise it sends and forbids stopping signal to ECU；
2) TCU controls two clutch separations respectively, the clutch pressure sensor signal acquired by reading gearbox,
Judge whether clutch pressure is less than predetermined threshold value (e.g., being set as 150kpa).Continue following 3) judgement if meeting, otherwise
Transmission forbids stopping signal to ECU；
3) check dual-clutch transmission oil temperature state whether in prescribed limit, speed, gas pedal, brake step on
Whether board status meets the requirements, and continues following 4) judgement if meeting, otherwise sends and forbid stopping signal to ECU；
4) TCU judges dual-clutch transmission with the presence or absence of failure, and shutdown is sent if fault-free allows idling to stop
Otherwise machine signal sends to ECU and forbids stopping signal to ECU.
The ECU after the permission idle stop signal is received, shut down by control engine.
Fig. 4 is D grades of automatic startup control flows, and TCU is receiving engine idle stop state and engine shutdown shape
After state, then TCU needs to carry out automatic entry condition judgement in the following order and start to prepare：
1) whether speed change box clutch state is checked in discrete state, if so, into 2) Rule of judgment, otherwise TCU
Transmission forbids automatically activated signal to ECU；
2) whether detection gearbox-gear keeps off in D, if so, into 3) Rule of judgment, otherwise TCU transmissions are forbidden automatic
Enabling signal is to ECU；
3) if detection gearbox, there is no failure, carries out startup and prepares (to control double clutches with the presence or absence of failure
Device automatic gear-box is attracted the transmission chain)；If there are failure, but when fault severity level be not enough to enter limping pattern, then
Continue to carry out startup preparation, otherwise TCU transmissions forbid automatically activated signal to ECU；
4) meet condition, then engine can start at any time, at this time according to gas pedal situation, enter if stepping on the throttle
Starting control；If not stepping on the throttle or stepping on brake, enter control of wriggling.
Fig. 5 and Fig. 6 is N gear autostop control flows and N grade automatic start-stop control flows respectively, the flow with D grades oneself
Dynamic start-up and shut-down control flow is similar, and I will not elaborate.
The present invention provides one kind to be applied to traditional (auxiliary elements such as no electronic oil pump, accumulator) wet-type dual-clutch certainly
The start-stop control system and method for dynamic gearbox, the start stop system can allow vehicle D gears (forward gear) or N gears (neutral gear) into
Row start-up and shut-down control.
The structure, feature and effect of the present invention, more than institute are described in detail based on the embodiments shown in the drawings
Only presently preferred embodiments of the present invention is stated, but the present invention is not to limit practical range shown in drawing, it is every according to structure of the invention
Want made change or be revised as the equivalent embodiment of equivalent variations, when not going beyond the spirit of the description and the drawings,
It should all be within the scope of the present invention.
Claims (9)
- A kind of 1. vehicle start-up and shut-down control method, which is characterized in that including：Control unit of engine ECU sends idle stop request signal to gear box control unit TCU；The TCU carries out idle stop condition judgment, is meeting the idling after the idle stop request signal is received During halt condition, control dual-clutch transmission disengages transmission chain, and after successfully disengagement is detected, sending allows Idle stop signal is to the ECU；The ECU is after the permission idle stop signal is received, and control engine is shut down, by engine idle stop state Signal is switched to idle stop state, and engine status signal is switched to shutdown status, and the engine after state is switched Engine status signal after idle stop status signal and state switching is sent to the TCU；The TCU is receiving the engine idle stop status signal and the engine condition letter that the ECU is sent After number, automatic entry condition judgement is carried out, when meeting the automatic entry condition, controls the dual-clutch transmission The transmission chain is attracted, and automatically activated signal will be forbidden to be switched to allow automatic starting state, and after state is switched Automatically activated signal is forbidden to be sent to the ECU；The ECU after receiving the state switching that the TCU sends forbid automatically activated signal after, stepped on according to throttle The state of plate controls the engine to start automatically, controls engine status signal using corresponding automatic startup control mode Starting state is switched to, then is switched to operating status, and is detecting engine status signal successful switch to operating status Later, engine idle stop status signal is switched to non-idle stop state.
- 2. according to the method described in claim 1, it is characterized in that, the idle stop condition includes：The current shift of dual-clutch transmission is in forward gear or neutral gear；The oil temperature of the dual-clutch transmission, the current vehicle speed of the vehicle, gas pedal and brake pedal shape State meets corresponding preset condition respectively.
- 3. according to the method described in claim 1, it is characterized in that, after idle stop condition judgment is carried out, the method It further includes：When being unsatisfactory for the idle stop condition, the TCU transmissions forbid stopping signal to the ECU.
- 4. according to the method described in claim 1, it is characterized in that：The TCU is detecting the respective pressure of the double clutch by obtaining the respective pressure signal of double clutch When signal is respectively less than predetermined threshold value, it is determined that the dual-clutch transmission successfully disengages the transmission chain.
- 5. according to the method described in claim 1, it is characterized in that, the TCU is receiving the idle stop request signal Afterwards, the method further includes：For the TCU when detecting that dual-clutch transmission breaks down, transmission forbids stopping signal to the ECU.
- 6. according to any methods of claim 1-5, which is characterized in that the automatic entry condition includes：Dual-clutch transmission successfully disengages transmission chain；The current shift of dual-clutch transmission is in forward gear or neutral gear.
- 7. according to any methods of claim 1-5, which is characterized in that after automatic entry condition judgement is carried out, institute The method of stating further includes：When being unsatisfactory for the automatic entry condition, the TCU transmissions forbid automatically activated signal to the ECU.
- 8. according to any methods of claim 1-5, which is characterized in that according to the state of gas pedal, use is corresponding The automatic control mode that starts controls the engine to start automatically, including：The ECU detects that gas pedal in when stepping on state, controls the engine to open automatically using starting control mode It is dynamic；The ECU detects that gas pedal in when not stepping on state, controls the engine automatic using wriggling control mode Start.
- 9. according to any methods of claim 1-5, which is characterized in that the TCU is in the institute for receiving the ECU transmissions After stating engine idle stop status signal and the engine status signal, the method further includes：The TCU is detected when detecting that dual-clutch transmission breaks down and is broken down that belong to can not During failure corresponding into slope row pattern, transmission forbids automatically activated signal to the ECU；The TCU is detected when detecting that dual-clutch transmission breaks down and is broken down that belong to can During failure corresponding into slope row pattern, it is judged as meeting the automatic entry condition, and continues to execute control double clutches Device automatic gear-box is attracted the operation of the transmission chain.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108622068A (en) * | 2017-03-15 | 2018-10-09 | 陕西汽车集团有限责任公司 | Vehicle idling start-stop control system and method |
| CN111762159B (en) * | 2019-03-14 | 2023-01-17 | 中国第一汽车股份有限公司 | Start-stop coordination control method for 48V micro-mixing system double-clutch transmission |
| CN110466501B (en) * | 2019-09-11 | 2021-02-09 | 吉林大学 | Hybrid electric vehicle engine start-stop control method |
| CN111098841A (en) * | 2019-12-27 | 2020-05-05 | 中国第一汽车股份有限公司 | Vehicle stop sliding control method, storage medium and vehicle |
| CN112360658B (en) * | 2020-09-25 | 2022-04-26 | 东风小康汽车有限公司重庆分公司 | Engine start-stop control method compatible with ACC system |
| CN112896168B (en) * | 2021-03-15 | 2022-11-01 | 东风汽车集团股份有限公司 | Intelligent start-stop control method for vehicle |
| CN115325158A (en) * | 2022-08-26 | 2022-11-11 | 同济大学 | Vehicle start-stop control method, system, equipment and medium |
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