CN105465352B - A kind of automatic transmission automatic start-stop control method of Transmission System - Google Patents
A kind of automatic transmission automatic start-stop control method of Transmission System Download PDFInfo
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- CN105465352B CN105465352B CN201511030098.6A CN201511030098A CN105465352B CN 105465352 B CN105465352 B CN 105465352B CN 201511030098 A CN201511030098 A CN 201511030098A CN 105465352 B CN105465352 B CN 105465352B
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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
- F16H61/0003—Arrangement or mounting of elements of the control apparatus, e.g. valve assemblies or snapfittings of valves; Arrangements of the control unit on or in the transmission gearbox
- F16H61/0009—Hydraulic control units for transmission control, e.g. assembly of valve plates or valve units
-
- 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
- B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
-
- 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
- B60W10/30—Conjoint control of vehicle sub-units of different type or different function including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps
-
- 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
- B60W2510/06—Combustion engines, Gas turbines
- B60W2510/0638—Engine speed
-
- 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
- B60W2510/06—Combustion engines, Gas turbines
- B60W2510/0676—Engine temperature
-
- 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
- B60W2510/10—Change speed gearings
- B60W2510/107—Temperature
-
- 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
- F16H2061/0015—Transmission control for optimising fuel consumptions
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Transmission Device (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
The present invention relates to transmission technology field,A kind of Transmission System and automatic transmission automatic start-stop control method are provided,Transmission System includes hydraulic automatic speed variator hydraulic-mechanic system and transmission control unit,Hydraulic automatic speed variator hydraulic-mechanic system includes valve plate,Shift clutch and mechanical pump,Shift clutch and mechanical pump are connected with valve plate respectively,Valve plate electrically connects with transmission control unit,Transmission System also includes the electric pump being arranged in parallel with mechanical pump,Electric pump is connected with valve plate,Electric pump is connected with electric pump controller,Electric pump controller is connected with transmission control unit,Realize the start and stop function of vehicle,Meet while the minimum system pressure required for vehicle start and stop stage hydraulic automatic speed variator hydraulic-mechanic system,To provide driving-chain pressure with reference to required in engine starting process,Ensure the couple drive chain of hydraulic automatic speed variator hydraulic-mechanic system quick and stable and export power,Vehicle ignition is improved to the response time of starting.
Description
Technical field
The invention belongs to transmission technology field, more particularly to a kind of automatic transmission of Transmission System to open automatically
Stop control method.
Background technology
Starting-shutdown system (abbreviation start stop system) temporary parking (such as etc. red light) in automatic transmission vehicle travel process
When, engine auto extinguishing, when needing to move on, system restarts the set of system of engine automatically.Its specific principle
For：As long as directly stepping on brake pedal in traveling, vehicle stop completely general two seconds rear engines will auto extinguishing, step on always
Brake pedal, engine will remain turned-off.As long as a releasing of brake, or steering wheel rotation, engine again can certainly at once
Dynamic point fire, can step on the gas starting again immediately, and whole process is all in D shelves states.The start stop system can substantially reduce crowded
City operating mode under stop (waiting red light) during fuel consumption, avoid active flameout in driver's docking process and bring
It is cumbersome.
Start stop system not only needs to control engine can be according to the intention auto extinguishing of driver and startup, it is also necessary to controls
Automatic transmission processed can coordinate engine to open driving-chain to reduce the load of engine starting process, simultaneously engage with driving-chain
Carry out the power of output engine, still, while fuel consumption is saved, engine start continues effect current start stop system
Weaker, response speed is slower, and engine power lifting is slower, influences the startup starting experience of user.
The content of the invention
It is an object of the invention to provide a kind of Transmission System, it is intended to solves start stop system in the prior art and is saving
While saving fuel consumption, engine start continues, and effect is weaker, and response speed is slower, and engine power lifting is slower, influences
The problem of startup starting experience of user.
The present invention is achieved in that a kind of Transmission System, including hydraulic automatic speed variator machinery hydraulic system
And transmission control unit, the hydraulic automatic speed variator machinery hydraulic system include valve plate, shift clutch and mechanical pump, institute
State shift clutch and mechanical pump to be connected with the valve plate respectively, the valve plate electrically connects with the transmission control unit, institute
The electric pump that Transmission System also includes being arranged in parallel with the mechanical pump is stated, the electric pump is connected with the valve plate, described
Electric pump is electrically connected with electric pump controller, and the electric pump controller is connected with the transmission control unit.
As an improvement scheme, the electric pump is arranged on the outside of the automatic transmission, the electric pump controller
It is connected between the transmission control unit by CAN.
Another object of the present invention is to provide a kind of automatic transmission automatic start-stop control based on Transmission System
Method processed, methods described comprise the steps：
Control unit of engine is monitored to speed, brake signal, engine water temperature and gear signal, is judged whether
Meet the primary condition that start and stop function is opened；
When meeting the primary condition of start and stop function unlatching, the control unit of engine is sent to transmission control unit
Start and stop work request and opening driving-chain request；
The transmission control unit judges whether to meet the necessary condition that start and stop function is opened；
When meeting the necessary condition of start and stop function unlatching, driving-chain is opened in the transmission control unit control, simultaneously
Driving-chain Status Flag is sent to the control unit of engine and start and stop are ready to complete mark；
The control unit of engine control engine performs quenching operations, and it is advance to judge whether engine speed is less than
The first threshold engine speed set；
When engine speed is less than the first threshold engine speed pre-set, the control unit of engine passes through
The transmission control unit sends engine speed instruction, the electric pump controller control electric pump operating dimension to electric pump controller
Hold the minimum oil pressure state required for the hydraulic automatic speed variator machinery hydraulic system.
As an improvement scheme, the transmission control unit judges whether to meet the necessary bar that start and stop function is opened
The step of part, specifically includes following step：
Whether the transmission control unit is judged in shift process current shift clutch；
When the current shift clutch is not on shift process, the transmission control unit judges the electric pump
With the presence or absence of failure；
When the electric pump does not have failure, the transmission control unit is to the hydraulic automatic speed variator mechanical-hydraulic system
Oil temperature in system is judged, judges whether the oil temperature in the hydraulic automatic speed variator machinery hydraulic system is in normal model
Enclose；
When the oil temperature in the hydraulic automatic speed variator machinery hydraulic system is in normal range (NR), the transmission control
Unit is judged with the presence or absence of fault message the hydraulic automatic speed variator machinery hydraulic system；
If the hydraulic automatic speed variator machinery hydraulic system does not have fault message, judge that Current vehicle meets to open
Stop the necessary condition of function unlatching.
As an improvement scheme, the primary condition that the start and stop function is opened includes whether speed is equal to 0, braking letter
Number whether be true, engine water temperature whether in normal range (NR) and gear whether in D shelves.
Another object of the present invention is to provide a kind of automatic transmission automatic start-stop controlling party of Transmission System
Method, it is characterised in that methods described comprises the steps：
The severity of braking signal of Current vehicle is monitored, judges whether the severity of braking of Current vehicle is less than and sets in advance
Fixed severity of braking calibration value；
When the severity of braking of Current vehicle is less than severity of braking calibration value set in advance, control unit of engine control
Engine performs ignition operation, meanwhile, transmission control unit sends rotating speed increase instruction to electric pump controller；
The electric pump controller increases according to the rotating speed to be instructed, and control electric pump gives hydraulic automatic speed variator mechanical-hydraulic system
System replenishment system oil pressure；
The transmission control unit judges whether the condition for meeting driving-chain engagement；
When meeting the condition of driving-chain engagement, the transmission control unit controls couple drive chain；
The transmission control unit sends the status information of driving-chain combination to control unit of engine.
As an improvement scheme, the transmission control unit judges whether to meet the step of the condition of driving-chain engagement
Suddenly following step is specifically included：
The transmission control unit judges whether engine enters working condition；
When the engine enters working condition, judge whether engine speed is more than and pre-set second turn of engine
Fast threshold value；
When engine speed, which is more than, pre-sets the second rotary speed threshold value of engine, judge currently to meet driving-chain engagement
Condition.
Another object of the present invention is to provide a kind of rotating speed control of electric pump controller based on Transmission System
Method, methods described comprise the steps：
When engine speed drops to the first electric pump reference rotation velocity value, control electric pump controller is started working, and lifts institute
The rotating speed for stating electric pump controller is in the start and stop stage of minimum system pressure to holding hydraulic automatic speed variator machinery hydraulic system
Rotating speed；
In the vehicle start and stop stage, the electric pump controller control is operated on the start and stop stage rotating speed；
When ascent stage of the engine speed by 0, the electric pump controller improves the rotating speed of electric pump to presetting
The second electric pump reference rotation velocity value；
When engine speed reaches the second electric pump reference rotation velocity value, electric pump controller control electric pump is stopped.
As an improvement scheme, methods described also comprises the steps：
According to engine speed nEng, accelerator open degree α and automatic transmission oil temperature TOil, calculate start and stop stage rotating speed nEOP,
Wherein：
nEOP=f1(nEng,α)*f2(nEng,TOil)；
f1(nEng, α) for electric pump controller according to engine speed nEngObtained target control is tabled look-up with accelerator open degree α
Rotating speed processed, f2(nEng,TOil) for electric pump controller according to engine speed nEngWith automatic transmission oil temperature TOilTable look-up
Arrive to target control rotating speed f1(nEng, α) and the penalty coefficient that is modified.
As an improvement scheme, methods described also comprises the steps：
Pre-set the first electric pump reference rotation velocity value and the second electric pump reference rotation velocity value of engine.
In embodiments of the present invention, Transmission System includes hydraulic automatic speed variator machinery hydraulic system and speed changer
Control unit, hydraulic automatic speed variator machinery hydraulic system include valve plate, shift clutch and mechanical pump, shift clutch and machine
Tool pump is connected with valve plate respectively, and valve plate electrically connects with the transmission control unit, and Transmission System also includes and machinery
The electric pump that parallel connection of pumps is set, electric pump are connected with the valve plate, and electric pump is electrically connected with electric pump controller, electric pump controller and speed changer
Control unit connects, and realizes the start and stop function of vehicle, meets in vehicle start and stop stage hydraulic automatic speed variator machinery hydraulic system
It is that driving-chain pressure required for withing reference to is provided in engine starting process while required minimum system pressure, guarantee liquid
The couple drive chain of power automatic transmission machinery hydraulic system quick and stable simultaneously exports power, improves vehicle ignition to the sound of starting
Between seasonable.
Brief description of the drawings
Fig. 1 is the structural representation of Transmission System provided in an embodiment of the present invention；
Fig. 2 is automatic transmission automatic start-stop control method (Transmission System start and stop provided in an embodiment of the present invention
Function open) implementation process figure；
Fig. 3 is that transmission control unit provided in an embodiment of the present invention judges whether to meet the necessary bar that start and stop function is opened
The specific implementation flow chart of part；
Fig. 4 is automatic transmission automatic start-stop control method (Transmission System start and stop provided in an embodiment of the present invention
Function close) implementation process figure；
Fig. 5 is the step that transmission control unit provided in an embodiment of the present invention judges whether to meet the condition of driving-chain engagement
Rapid specific implementation flow chart；
Fig. 6 is the implementation process figure of the method for controlling number of revolution of electric pump controller provided in an embodiment of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Fig. 1 shows the structural representation of Transmission System provided by the invention, for convenience of description, is only given in figure
Part related to the present invention is gone out.
Transmission System includes hydraulic automatic speed variator machinery hydraulic system 1 and transmission control unit 2, the fluid power
Automatic transmission machinery hydraulic system 1 includes valve plate 3, shift clutch 4 and mechanical pump 6, and shift clutch 4 and mechanical pump 6 divide
It is not connected with valve plate 3, valve plate 3 electrically connects with transmission control unit 2, and Transmission System also includes in parallel with mechanical pump 6
The electric pump 7 of setting, electric pump 7 are connected with valve plate 3, and electric pump 7 is electrically connected with electric pump controller 8, electric pump controller 8 and transmission control
Unit 2 connects.
Certainly, Transmission System as shown in Figure 1 also includes other composition structures, will not be repeated here.
Wherein, the Transmission System uses double pump structure, i.e. mechanical pump 6 and electric pump 7 structure in parallel, the electric pump 7
The hull outside of automatic transmission can be arranged on, is connected between electric pump controller 8 and transmission control unit 2 by CAN
Connect.
After engine misses, the fuel cut-off of mechanical pump 6 that is connected with engine output shaft, hydraulic automatic speed variator machinery
Housing oil duct 9 in hydraulic system 1 and the automatic transmission fluid (lubricating oil) in the plunger shaft of shift clutch 4 will be due to weights
The remote of power is back in the oil sump 10 of hydraulic automatic speed variator machinery hydraulic system 1, hydraulic automatic speed variator mechanical-hydraulic system
The system oil pressure of system 1 is changed into 0；When engine is lighted a fire again, first have to fill the work of housing oil duct 9 and shift clutch 4
Chamber is filled in, couple drive chain could be controlled to complete power transmission, whole driving-chain engaging time increases, and the effect that continues is poor；On and
The design of electric pump 7 and electric pump controller 8 is stated, solves the problem, it is specially：
One electric pump 7 is set in the hull outside of hydraulic automatic speed variator machinery hydraulic system 1, the electric pump 7 is connected in parallel on original
On the oil circuit of mechanical pump 6, i.e. oil line pipe one end of electric pump 7 connects with oil sump 10, and the other end connects with valve plate 3, the electric pump 7
Work by electric pump controller 8 (EOP) control；
When engine speed is less than the first electric pump reference rotation velocity value set in advance, electric pump controller 8 controls electric pump 7 to give
Hydraulic automatic speed variator machinery hydraulic system supplements automatic transmission fluid, and make hydraulic automatic speed variator machinery hydraulic system 1 is
System oil pressure is maintained in minimum system pressure limit, wherein the minimum required for the hydraulic automatic speed variator machinery hydraulic system 1
System pressure is the pressure state for keeping shift clutch 4 to be in abutment, can quickly be engaged after driver's take-off the brake
Driving-chain；
When engine is lighted a fire again, mechanical pump 6 for hydraulic automatic speed variator 1 fuel feeding of machinery hydraulic system while,
Electric pump controller 8 also lifts fuel feeding rotating speed, and electric pump 7 continues to make biography to the fuel feeding of hydraulic automatic speed variator machinery hydraulic system 1 at a high speed
Dynamic chain is quickly engaged, and is completed power transmission, is eliminated the piston that mechanical pump 6 slowly fills housing oil duct 9 and shift clutch 4
The process of chamber, the response time of the start and stop function of the Transmission System is improved, lift the driving experience of driver, while
It is fuel-efficient, environmentally friendly.
In embodiments of the present invention, as shown in figure 1, transmission control unit 2 realizes gearshift by the electrical connection with valve plate 3
The gearshift control of clutch 4, meanwhile, the control of rotating speed is carried out to electric pump controller 8 by the way of the communication of CAN 5, so as to
Realize that electric pump 7 exports the control of the flow of automatic transmission fluid；
Transmission control unit 2 is connected with control unit of engine 11 by CAN 5, control unit of engine 11
Whether the signal decision-makings such as speed, severity of braking and throttle according to input enter the control of engine start and stop.
In this embodiment, control unit of engine 11, transmission control unit 2 and electric pump controller 8, which are used as, realizes certainly
The core component of dynamic transmission system start and stop function, between control unit of engine 11 and transmission control unit 2, speed changer control
The mode that CAN 5 communicates is respectively adopted between unit 2 processed and electric pump controller 8 and carries out content-control, it is specially：
Communication between control unit of engine 11 and transmission control unit 2 is closed primarily to completing driving-chain and opening
The control that the control closed and engine misses start；
Communication between transmission control unit 2 and electric pump controller 8 is primarily to complete the control to the rotating speed of electric pump 7
The protection of related security policies is formulated with the failure to electric pump 7；
Transmission control unit 2 sends gear positions, start and stop prohibitory sign, driving-chain state to control unit of engine 11
Mark, start and stop are ready to complete the signal of mark, control unit of engine 11 to transmission control unit 2 send engine condition,
Open driving-chain, the signal of start and stop work request；
Transmission control unit 2 sends the control instruction of rotary speed parameter and dbjective state, electric pump control to electric pump controller 8
Device 8 returns to the actual speed of electric pump controller 8, voltage failure, current failure, open fault, open circuit to transmission control unit 2
The too high failure of failure, temperature.
Embodiment with reference to shown in Fig. 1, Fig. 2 show automatic transmission automatic start-stop control provided in an embodiment of the present invention
The implementation process figure of method (unlatching of Transmission System start and stop function), its specific step are as follows：
In step S101, control unit of engine is carried out to speed, brake signal, engine water temperature and gear signal
Monitoring.
In step s 102, judge whether Transmission System meets the primary condition that start and stop function is opened, if then
Step S103 is performed, otherwise returns and continues executing with step S101.
In step s 103, when meeting primary condition that start and stop function is opened, control unit of engine is to speed changer control
Unit processed sends start and stop work request and opens driving-chain request.
In step S104, transmission control unit judges whether to meet the necessary condition that start and stop function is opened, if then
Step S105 is performed, otherwise performs and returns to execution step S103.
In step S105, when meeting the necessary condition of start and stop function unlatching, transmission control unit control, which is opened, to be passed
Dynamic chain, while it is ready to complete mark to control unit of engine transmission driving-chain Status Flag and start and stop.
In step s 106, control unit of engine control engine performs quenching operations.
In step s 107, judge whether engine speed is less than the first threshold engine speed pre-set, be then
Step S108 is performed, otherwise returns and continues to judge.
In step S108, when engine speed is less than the first threshold engine speed pre-set, engine control
Unit processed sends engine speed to electric pump controller by transmission control unit and instructed, the control electric pump operating of electric pump controller
Maintain the minimum oil pressure state required for hydraulic automatic speed variator machinery hydraulic system；
Wherein, first threshold engine speed is according to the parameter of the actual speed of engine setting, such as 500rpm.
The primary condition that above-mentioned start and stop function is opened specifically includes the description below：The primary condition that start and stop function is opened includes
Speed whether be equal to 0, brake signal whether be true, engine water temperature whether in normal range (NR) and gear whether in D shelves；
When above-mentioned condition is satisfied by, represents that the primary condition that start and stop function starts meets, be otherwise unsatisfactory for.
In embodiments of the present invention, as shown in figure 3, transmission control unit judge whether to meet start and stop function opens must
The step of wanting condition specifically includes following step：
In step s 201, whether transmission control unit is judged in shift process current shift clutch,
If then performing step S206, step S202 is otherwise performed.
In step S202, when current shift clutch is not on shift process, transmission control unit judges electricity
Pump whether there is failure, if then performing step 206, otherwise perform step S203.
In step S203, when electric pump does not have failure, transmission control unit is to hydraulic automatic speed variator mechanical-hydraulic
Oil temperature in system is judged, judges whether the oil temperature in hydraulic automatic speed variator machinery hydraulic system is in normal range (NR),
It is then to perform step S204, otherwise performs step S206.
In step S204, when the oil temperature in hydraulic automatic speed variator machinery hydraulic system is in normal range (NR), speed change
Device control unit is judged with the presence or absence of fault message hydraulic automatic speed variator machinery hydraulic system, if then performing step
S206, otherwise perform step S205.
In step S205, if hydraulic automatic speed variator machinery hydraulic system does not have fault message, judge current
Vehicle meets the necessary condition that start and stop function is opened.
In step S206, transmission control unit, which needs to send to control unit of engine, forbids start and stop to instruct.
As shown in Figures 2 and 3, the request of start and stop mode of operation is judged by control unit of engine, when monitoring car
It is that true, speed changer meets that start and stop function is opened in D (P/N) shelves, engine water temperature in certain scope that speed, which is equal to 0, service brake signal,
Primary condition then to transmission control unit send start and stop work request, and ask open speed changer driving-chain；Speed changer
Control unit is after the instruction of start and stop work request is received, it is necessary to shift process, electric pump failure, oil temperature scope, hydraulic automatic
Speed changer machinery hydraulic system failure is judged that transmission control unit is needed to engine if primary condition is unsatisfactory for
Control unit, which is sent, forbids start and stop to instruct.When meeting primary condition, the transmission of speed changer is opened in transmission control unit control
Chain enters neutral position state, and then transmission control unit sends driving-chain open mode to control unit of engine and start and stop are accurate
Standby completion status, control unit of engine control engine misses according to the instruction received；When engine speed is less than
After 500rpm, mechanical pump be able to not will continue to provide oil pressure, so transmission control unit needs to send to electric pump controller
Rotary speed instruction maintains system minimum oil pressure, finally enters start and stop working condition.
Embodiment with reference to shown in Fig. 1, Fig. 4 show automatic transmission automatic start-stop control provided in an embodiment of the present invention
The implementation process figure of method (closing of Transmission System start and stop function), its specific step are as follows：
In step S301, the severity of braking signal of Current vehicle is monitored, judges the severity of braking of Current vehicle
Whether it is less than severity of braking calibration value set in advance, if then performing step S302, otherwise performs step S308.
In step s 302, when the severity of braking of Current vehicle is less than severity of braking calibration value set in advance, start
Machine control unit control engine performs ignition operation, meanwhile, transmission control unit sends rotating speed increase to electric pump controller
Instruction.
In step S303, electric pump controller increases according to rotating speed to be instructed, and control electric pump gives hydraulic automatic speed variator machinery
Hydraulic system replenishment system oil pressure.
In step s 304, transmission control unit judges whether the condition for meeting driving-chain engagement, is to perform step
S305, otherwise return and perform step S303.
In step S305, when meeting the condition of driving-chain engagement, transmission control unit control couple drive chain.
In step S306, judge whether driving-chain engagement is completed, be that then execution step S307, otherwise return perform step
S305。
In step S307, transmission control unit sends the status information of driving-chain combination to control unit of engine.
In step S308, start and stop state is kept.
In this embodiment, as shown in figure 5, above-mentioned transmission control unit judges whether the condition for meeting driving-chain engagement
The step of specifically include following step：
In step S401, transmission control unit judges whether engine enters working condition, is to perform step
S402, otherwise perform step S404.
In step S402, when engine enters working condition, judge whether engine speed is more than and pre-set hair
The rotary speed threshold value of motivation second, it is then to perform step S403, otherwise performs step S404.
In step S403, when engine speed, which is more than, pre-sets the second rotary speed threshold value of engine, judge current full
The condition of sufficient driving-chain engagement.
In step s 404, returning to perform controls electric pump to give hydraulic automatic speed variator machinery hydraulic system replenishment system oil pressure
The step of.
The wherein above-mentioned rotary speed threshold value of engine second is to preset a calibration value, such as 600rpm.
In embodiments of the present invention, as shown in Figure 4 and Figure 5, during driver's releasing of brake, by detecting brake
Severity of braking signal, to identify the intention of driver in advance.If severity of braking is less than setting value, need to start engine,
Couple drive chain is moved by car and started to walk, and is specially:
Started first by control unit of engine control engine ignition, transmission control unit is according to the rotating speed of engine
To control the rotating speed of electric pump controller to supplement Transmission System flow；
In low engine speed region, the flow system flow that original mechanical pump provides is less, by the rotating speed of electric pump controller
Control to supplement the minimum system pressure needed for engagement clutch；
Transmission control unit also needs to determine whether to engage according to the working condition (Running) and rotating speed of engine
Driving-chain, if rotating speed is more than 600rpm and engine enters Running states, transmission control unit control couple drive
Chain；
After the completion of the action of couple drive chain, then the instruction of driving-chain closure state is sent to control unit of engine；
Last transmission control unit control electric pump controller closes electric pump, completes the closing of start and stop function.
In embodiments of the present invention, Fig. 6 shows the method for controlling number of revolution of electric pump controller provided in an embodiment of the present invention
Implementation process figure, its specific step is as described below：
In step S501, when engine speed drops to the first electric pump reference rotation velocity value, control electric pump controller is opened
Beginning work, rotating speed to the holding hydraulic automatic speed variator machinery hydraulic system for lifting electric pump controller are in minimum system pressure
Start and stop stage rotating speed.
In step S502, in the vehicle start and stop stage, the control of electric pump controller is operated on start and stop stage rotating speed.
In step S503, when ascent stage of the engine speed by 0, electric pump controller improves the rotating speed of electric pump extremely
Second electric pump reference rotation velocity value set in advance.
In step S504, when engine speed reaches the second electric pump reference rotation velocity value, electric pump controller control electric pump
It is stopped.
Wherein, also comprise the steps in the embodiment：
According to engine speed nEng, accelerator open degree α and automatic transmission oil temperature TOil, calculate start and stop stage rotating speed nEOP,
Wherein：
nEOP=f1(nEng,α)*f2(nEng,TOil)；
f1(nEng, α) for electric pump controller according to engine speed nEngObtained target control is tabled look-up with accelerator open degree α
Rotating speed processed, f2(nEng,TOil) for electric pump controller according to engine speed nEngWith automatic transmission oil temperature TOilTable look-up
Arrive to target control rotating speed f1(nEng, α) and the penalty coefficient that is modified.
Wherein, engine speed nEngCorresponding table with accelerator open degree α is the tables of data previously generated, and it is specific right
It should be related to and may be referred to following form：
Engine speed nEngWith automatic transmission oil temperature TOilCorresponding table be the tables of data previously generated, it is specific right
It should be related to and may be referred to following form：
Above-mentioned two form is the form pre-set according to the situation of reality, be will not be repeated here.
In this embodiment, the first electric pump reference rotation velocity value of engine and the second electric pump reference rotation velocity value need to set in advance
Put, to be monitored to the tachometer value of engine.
In embodiments of the present invention, in Transmission System, fluid drive is provided using mechanical pump and electric pump are in parallel
The mode of device flow system flow, it is simple in construction, on the basis of traditional hydraulic automatic speed variator machinery hydraulic system, in fluid power certainly
One electric pump of outside increase of dynamic speed changer machinery hydraulic system housing can meet the requirement of start and stop function, avoid in speed changer
The change of portion's structure, cost are low；
Transmission System safe and efficient can realize the start and stop function of vehicle, and engine is cooperateed with by CAN signal
The start and stop function of vehicle is realized in control between control unit, transmission control unit and pumping systems, and reaching reduces oil consumption
Purpose, and the intention that can really respond driver controls the opening and closing of start and stop in the best opportunity, will not be because of hair
Motivation is flame-out and sacrifices the driving of vehicle；
The opening and closing control method of above-mentioned Transmission System start and stop function, control flow simply can be according to systems
Engagement of the fatigue resistance signal to driving-chain is realized to be prejudged in advance, keeps clutch to be in clutch when engine misses
Engage point pressure, can after driver's take-off the brake engine start quick couple drive chain, allow vehicle movement start to walk, carry
The response characteristic of high start and stop function；
The control strategy simple and flexible of electric pump controller, meets different engine region by the way of tabling look-up
The control rotating speed requirement of electric pump controller, can easily realize the adjustment of control parameter, according to throttle, oil temperature, engine speed
It is controlled the control requirement for meeting to be possible to operating mode.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (5)
1. a kind of automatic transmission automatic start-stop control method of Transmission System, the Transmission System include liquid
Power automatic transmission machinery hydraulic system and transmission control unit, the hydraulic automatic speed variator machinery hydraulic system include valve
Plate, shift clutch and mechanical pump, the shift clutch and mechanical pump are connected with the valve plate respectively, the valve plate with it is described
Transmission control unit electrically connects, and the Transmission System also includes the electric pump being arranged in parallel with the mechanical pump, described
Electric pump is connected with the valve plate, and the electric pump is electrically connected with electric pump controller, the electric pump controller and the transmission control
Unit connects；Characterized in that, methods described comprises the steps：
The severity of braking signal of Current vehicle is monitored, judges the severity of braking of Current vehicle whether less than set in advance
Severity of braking calibration value；
When the severity of braking of Current vehicle is less than severity of braking calibration value set in advance, control unit of engine control is started
Machine performs ignition operation, meanwhile, transmission control unit sends rotating speed increase instruction to electric pump controller；
The electric pump controller increases according to the rotating speed to be instructed, and control electric pump is mended to hydraulic automatic speed variator machinery hydraulic system
Charging system oil pressure；
The transmission control unit judges whether the condition for meeting driving-chain engagement；
When meeting the condition of driving-chain engagement, the transmission control unit controls couple drive chain；
The transmission control unit sends the status information of driving-chain combination to control unit of engine.
2. automatic transmission automatic start-stop control method according to claim 1, it is characterised in that the transmission control
Whether unit judges meet that the step of condition of driving-chain engagement specifically includes following step：
The transmission control unit judges whether engine enters working condition；
When the engine enters working condition, judge whether engine speed is more than and pre-set engine the second rotating speed threshold
Value；
When engine speed, which is more than, pre-sets the second rotary speed threshold value of engine, the current bar for meeting driving-chain engagement is judged
Part.
3. a kind of method for controlling number of revolution of the electric pump controller of the Transmission System based on described in claim 1, its feature
It is, methods described comprises the steps：
When engine speed drops to the first electric pump reference rotation velocity value, control electric pump controller is started working, and lifts the electricity
The rotating speed of pump controller is in the start and stop stage rotating speed of minimum system pressure to holding hydraulic automatic speed variator machinery hydraulic system；
In the vehicle start and stop stage, the electric pump controller control is operated on the start and stop stage rotating speed；
When ascent stage of the engine speed by 0, the electric pump controller improves the rotating speed of the electric pump to presetting
The second electric pump reference rotation velocity value；
When engine speed reaches the second electric pump reference rotation velocity value, the electric pump controller control electric pump is stopped.
4. the method for controlling number of revolution of electric pump controller according to claim 3, it is characterised in that under methods described also includes
State step：
According to engine speed nEng, accelerator open degree α and automatic transmission oil temperature TOil, calculate start and stop stage rotating speed nEOP, its
In：
nEOP=f1(nEng,α)*f2(nEng,TOil)；
f1(nEng, α) for electric pump controller according to engine speed nEngTurn with the accelerator open degree α target controls for being tabled look-up to obtain
Speed, f2(nEng,TOil) for electric pump controller according to engine speed nEngWith automatic transmission oil temperature TOilTabled look-up what is obtained
To target control rotating speed f1(nEng, α) and the penalty coefficient that is modified.
5. the method for controlling number of revolution of the electric pump controller according to claim 3 or 4, it is characterised in that methods described is also wrapped
Include following step：
Pre-set the first electric pump reference rotation velocity value and the second electric pump reference rotation velocity value of engine.
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| CN201511030098.6A CN105465352B (en) | 2015-12-31 | 2015-12-31 | A kind of automatic transmission automatic start-stop control method of Transmission System |
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| CN106090205B (en) * | 2016-08-26 | 2018-03-23 | 哈尔滨东安汽车发动机制造有限公司 | A kind of automatic transmission start-up and shut-down control hydraulic circuit |
| CN108116397A (en) * | 2017-11-26 | 2018-06-05 | 沧州奥力威智能科技有限公司 | A kind of control method of automatic catch automobile |
| US20200109779A1 (en) * | 2018-10-08 | 2020-04-09 | GM Global Technology Operations LLC | System and method for controlling flow of transmission fluid |
| EP3650683A1 (en) * | 2018-11-12 | 2020-05-13 | Ningbo Geely Automobile Research & Development Co. Ltd. | A method for controlling a start-stop system of a vehicle |
| 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 |
| JP2021017919A (en) * | 2019-07-18 | 2021-02-15 | トヨタ自動車株式会社 | Vehicle oil supply device |
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| DE4425130A1 (en) * | 1993-08-17 | 1995-02-23 | Sauer Sundstrand Gmbh & Co | Hydrostatic travelling drive with proportional pressure control |
| JP2006258032A (en) * | 2005-03-18 | 2006-09-28 | Toyota Motor Corp | Vehicle control device |
| DE102008040667A1 (en) * | 2008-07-24 | 2010-01-28 | Zf Friedrichshafen Ag | Hydraulic system of a transmission device with a transmission main pump and an additional pump |
| KR101734272B1 (en) * | 2011-12-14 | 2017-05-12 | 현대자동차 주식회사 | Hydraulic producting system for transmission and control method thereof |
| WO2014070284A1 (en) * | 2012-10-31 | 2014-05-08 | Allison Transmission, Inc. | Method of controlling a hydraulic pressurization system of a transmission |
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