CN108327701B - A kind of starting control method and system - Google Patents
A kind of starting control method and system Download PDFInfo
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- CN108327701B CN108327701B CN201810154459.5A CN201810154459A CN108327701B CN 108327701 B CN108327701 B CN 108327701B CN 201810154459 A CN201810154459 A CN 201810154459A CN 108327701 B CN108327701 B CN 108327701B
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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
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
-
- 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
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/40—Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers
Abstract
The embodiment of the present invention provides a kind of starting control method and system, is related to technical field of engine control, which includes: when current residual electricity is less than low battery threshold value, and control starter motor dragging engine accelerates to the first revolving speed；When the current rotating speed of engine reaches the first revolving speed, engine ignition signal is sent to engine, so that engine enters the autonomous operation stage；The second revolving speed is accelerated to based on preset engine expectation revolving speed control engine；When engine reaches the second revolving speed, controlled in conjunction with separation clutch with the coupling for completing engine power and P2 motor power.When starting the engine being in close state using scheme provided by the invention, engine is first accelerated to the first revolving speed by starter motor, then it is approached from engine autonomous operation and to engine expectation revolving speed, so that even if still being able to provide torque jointly by engine and motor to meet the torque demand of vehicle acceleration when vehicle remaining capacity deficiency.
Description
Technical field
The present invention relates to technical field of engine control, in particular to a kind of starting control method and system.
Background technique
Currently, it is smaller based on change of the hybrid dynamic system of Technology of Hybrid Electric Vehicle to conventional drivetrain, and there is fuel-economizing
Effect clear advantage is thus more popular.As shown in Figure 1, being introduced by taking the P2 hybrid dynamic system in hybrid dynamic system as an example, P2
Module is the core technology of P2 hybrid dynamic system, which includes motor and separation clutch.It is maximized for fuel-economizing ability
Consider, when vehicle speed is more than setting value, control engine enters closed state.Therefore, in actual vehicle driving process,
When engine is in close state and driver needs to change driving intention (such as wishing that vehicle enters acceleration mode), usually need
After wanting motor drag engine to reach certain revolving speed, engine controller controls engine ignition, thus by motor and engine
It is common that torque (i.e. coupling control) is provided, to meet the torque demand of vehicle acceleration.But for mixed electrical automobile, work as vehicle
Remaining capacity when being not enough to support motor drag engine, be only unable to satisfy by motor driven in P2 module and vehicle accelerated
Torque demand.
Summary of the invention
The embodiment of the present invention is designed to provide a kind of starting control method and system, is in close state with starting
Engine, even so that still being able to be provided jointly by engine and motor in the insufficient situation of vehicle remaining capacity
Torque is to meet the torque demand that vehicle accelerates.
In order to achieve the above objectives, the embodiment of the invention discloses a kind of starting control method, the starting control method packets
It includes:
When current residual electricity is less than low battery threshold value, control starter motor dragging engine accelerates to the first revolving speed,
In, first revolving speed is the revolving speed that the engine enters utonomous working state；
When the current rotating speed of the engine reaches the first revolving speed, Xiang Suoshu engine sends engine ignition signal,
So that the engine enters the autonomous operation stage；
The engine is controlled based on preset engine expectation revolving speed and accelerates to the second revolving speed, wherein described second turn
Speed is that the engine approaches in the engine expectation Rotation Process, when reaching stable state based on speed closed loop control mode
Currently practical revolving speed；
When the engine reaches second revolving speed, in conjunction with separation clutch to complete engine power and P2 motor
The coupling of power controls.
Preferably, the acquisition methods of the preset engine expectation revolving speed include:
Revolving speed it is expected according to the speed of target vehicle and gear speed ratio acquisition of information motor；
Motor expectation revolving speed is set as engine expectation revolving speed.
Preferably, the motor is calculated according to following formula it is expected revolving speed ndes:
Wherein, v is the current vehicle speed of target vehicle, i0For base ratio, idesFor the speed ratio or downshift for being currently located gear
The speed ratio of gear where after processing.
Preferably, the engine accelerates to after the second revolving speed, the starting control method further include:
Judge whether the engine expectation revolving speed is greater than the threshold engine speed, if it is, into the first control
Process processed, if it is not, then into the second control flow；Wherein,
First control flow are as follows:
Engine current torque is calculated according to second revolving speed and the engine load；
Time cycle needed for receiving the expectation synchronous rotational speed of entire car controller transmission and reaching the expectation revolving speed；
The torque increase for promoting revolving speed is calculated according to the expectation synchronous rotational speed and the time cycle；
Speed control is carried out to the engine according to the current torque and the torque increase；
Second control flow are as follows:
Speed control is carried out to the engine using the engine idling of the engine.
Preferably, the starting control method further include:
Air inflow, the oil spout factor under different engine water temperatures are demarcated in advance, according to engine water temperature, air inlet
Amount, the oil spout factor control engine speed.
Preferably, the starting control method further include:
In the engine after described separate in conjunction with clutch, based on the revolving speed between the engine and the motor
Difference carries out closed-loop control to the oil pressure of the separation clutch.
In order to achieve the above objectives, the embodiment of the invention discloses a kind of starting control system, the starting control system packets
It includes: engine controller, entire car controller, starter motor, engine, motor and separation clutch；Wherein,
The entire car controller, the enabling signal sent for receiving the engine controller are receiving described open
The starter motor is controlled after dynamic signal, and the first revolving speed is accelerated to the engine；
The engine controller, for controlling the starter motor and dragging when current residual electricity is less than low battery threshold value
Dynamic engine accelerates to the first revolving speed；When the current rotating speed of the engine reaches the first revolving speed, Xiang Suoshu engine is sent
Engine ignition signal, so that the engine enters the autonomous operation stage；Institute is controlled based on preset engine expectation revolving speed
It states engine and accelerates to the second revolving speed；
When the engine reaches second revolving speed, in conjunction with separation clutch to complete engine power and P2 motor
The coupling of power controls, wherein and first revolving speed is the revolving speed that the engine enters utonomous working state, described second turn
Speed is that the engine approaches in the engine expectation Rotation Process, when reaching stable state based on speed closed loop control mode
Currently practical revolving speed.
Preferably, the entire car controller, for institute to be calculated according to the speed and gear speed ratio information of target vehicle
Motor expectation revolving speed is stated, and the motor being calculated expectation revolving speed is sent to the engine controller；
The engine controller it is expected revolving speed for receiving the motor that the entire car controller is sent, and by institute
It states motor expectation revolving speed and is set as engine expectation revolving speed.
Preferably, the entire car controller calculates the motor expectation revolving speed n according to following formulades:
Wherein, v is the current vehicle speed of target vehicle, i0For base ratio, idesFor the speed ratio or downshift for being currently located gear
The speed ratio of gear where after processing.
Preferably, the engine controller is also used to after the engine accelerates to the second revolving speed, described in judgement
Whether engine expectation revolving speed is greater than the threshold engine speed, if it is, into the first control flow, if it is not, then
Into the second control flow；Wherein,
First control flow are as follows:
Engine current torque is calculated according to second revolving speed and the engine load；
Time cycle needed for receiving the expectation synchronous rotational speed of the entire car controller transmission and reaching the expectation revolving speed；
The torque increase for promoting revolving speed is calculated according to the expectation synchronous rotational speed and the time cycle, according to described
Current torque and the torque increase carry out speed control to the engine；
Second control flow are as follows:
Speed control is carried out to the engine using the engine idling of the engine.
The embodiment of the present invention provides a kind of starting control method and system, when the engine that starting is in close state,
Engine is first accelerated to the first revolving speed by starter motor, is then approached from engine autonomous operation and to engine expectation revolving speed, from
And make when vehicle remaining capacity deficiency, it still is able to provide torque jointly by engine and motor to meet vehicle acceleration
Torque demand.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of hybrid dynamic system；
Fig. 2 is a kind of flow diagram for starting control method provided in an embodiment of the present invention；
Fig. 3 is the flow diagram of another starting control method provided in an embodiment of the present invention；
Fig. 4 (a) and (b) are respectively based on the hair under starting control provided by the first control flow and the second control flow
Motivation actual speed curve graph；
Fig. 5 is the ideal engine speed variation tendency of a kind of startup stage that the prior art provides；
Fig. 6 is the ideal air-fuel ratio variation tendency of a kind of startup stage that the prior art provides；
Fig. 7 is a kind of structural schematic diagram for starting control system provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Lower simple introduction is carried out to hybrid dynamic system first.Currently, P2 hybrid dynamic system is a kind of more popular hybrid dynamic system,
It is smaller to the change of conventional drivetrain.From hybrid dynamic system as shown in Figure 1 as can be seen that only engine and speed changer it
Between a P2 module is added, wherein the P2 module includes that a motor and a separation clutch, engine and gearbox are not necessarily to
Carrying out big change can be realized mixed dynamic effect, be mainly used for plug-in mixed dynamic and strong mixed.It should also be noted that, " P " in P2
Position of the motor in hybrid dynamic system is represented, specifically, after " 2 " this position is engine, before speed changer.Correspondingly,
According to the difference of motor position, it can also include P0, P1, P3 and P4 hybrid dynamic system, no longer introduce one by one herein.It needs
Bright, in order to make it easy to understand, the present invention is only illustrated by taking P2 hybrid dynamic system as an example, this should not constituted to skill of the present invention
The restriction of art scheme, that is to say, that P2 of the technical solution provided in an embodiment of the present invention not merely suitable for hybrid dynamic system
Hybrid dynamic system can be applicable to other hybrid dynamic systems.
Then lower introduction is carried out to the application scenarios of the embodiment of the present invention, for hybrid dynamic system, for fuel-economizing maximum
The design of change needs, and in the design phase of hybrid dynamic system, can set engine controller when vehicle speed is more than setting value
Control engine enters closed state.In this way, in practical application, when engine is in close state, if driver is by chance
Driving intention is changed, as determined in the case where accelerating to vehicle, is usually reached by the motor drag engine in P2 module
Certain revolving speed (" the first revolving speed " that is referred in subsequent step), then again by engine controller controls engine oil spout point
Fire, engine enter the autonomous operation stage, and engine itself accelerates to and is stable at engine expectation revolving speed (i.e. subsequent step nearby
" the second revolving speed " referred in rapid), torque (i.e. coupling controls) is then provided jointly by motor and engine, however, working as vehicle
Remaining capacity deficiency when motor be not enough to drag engine, and only motor driven is unable to satisfy to vehicle in the P2 module
The torque demand accelerated.
Therefore, in order to which the engine being in close state can be started in the insufficient situation of vehicle remaining capacity, and
Torque can be provided jointly by engine and motor to meet the torque demand of vehicle acceleration, the embodiment of the invention provides one kind
Start control method and system, first describes in detail below to a kind of starting control method provided in an embodiment of the present invention.
As shown in Fig. 2, for a kind of flow diagram for starting control method provided in an embodiment of the present invention, the starting control
Method processed includes:
S101: when current residual electricity is less than low battery threshold value, control starter motor dragging engine accelerates to first turn
Speed.
Wherein, first revolving speed is the revolving speed that the engine enters utonomous working state.
Specifically, the embodiment of the present invention is dragged to the first revolving speed by means of starter motor, by engine, for 12V starter motor
For, engine can be generally dragged to several hundred rpms.It should be noted that it is limited to the mechanical structure of starter motor,
When engine speed is more than 400 rpms or so, the gear of starter motor can be detached from the fluted disc of engine automatically, by starting
Machine autonomous operation.
It should be noted that for different engines, the numerical value of attainable first revolving speed can be different, this hair
Bright embodiment is without being defined the specific value of the first revolving speed.
It should also be noted that, " low battery threshold value " described herein can be the empirical value obtained according to experimental test,
Those skilled in the art need reasonably to be arranged according to the concrete condition in practical application.In addition, in practical application,
Current remaining capacity can be obtained in real time by the battery management system of vehicle, when entire car controller detects current residual electricity
When amount is less than low battery threshold value, control starter motor dragging engine rotation.
S102: when the current rotating speed of the engine reaches the first revolving speed, Xiang Suoshu engine sends engine ignition
Signal, so that the engine enters the autonomous operation stage.
Specifically, the speed probe for acquiring engine speed can be arranged in advance, and by engine collected
Revolving speed is reported to engine controller, in this way, when engine controller detects that the current rotating speed of engine reaches the first revolving speed
When, engine ignition signal is sent to engine, engine upon receipt of the signal light a fire by oil spout, and then transmitter enters certainly
The main operation phase, to continue to accelerate to engine.
S103: the engine is controlled based on preset engine expectation revolving speed and accelerates to the second revolving speed.
It is needing to illustrate but, " engine expectation revolving speed " here be it is preset, it is described in a kind of implementation
The acquisition methods of preset engine expectation revolving speed include: speed and the gear speed ratio acquisition of information motor phase according to target vehicle
Hope revolving speed；Motor expectation revolving speed is set as engine expectation revolving speed.It should also be noted that, described herein " second
Revolving speed " is that the engine approach engine it is expected to reach stable shape in Rotation Process, based on speed closed loop control mode
Currently practical revolving speed when state.
Specifically, calculating the motor according to following formula it is expected revolving speed ndes:
Wherein, v is the current vehicle speed of target vehicle, i0For base ratio, idesFor the speed ratio or downshift for being currently located gear
The speed ratio of gear where after processing.
It should be noted that being here only a kind of specific implementation for calculating motor expectation revolving speed, the present invention is implemented
Example does not need to be defined the concrete mode for calculating motor expectation revolving speed, and those skilled in the art need according to reality
Concrete condition in is reasonably arranged.
S104: when the engine reaches second revolving speed, in conjunction with separation clutch with complete engine power with
The coupling of P2 motor power controls.
Specifically, other than the speed probe that can be arranged in advance for acquiring engine speed, it can also be in advance
The speed probe for acquiring motor speed is arranged, in this way, entire car controller can obtain working as engine and motor respectively
Preceding revolving speed, and then the current rotating speed that can calculate engine and motor is poor, and then judges whether current rotating speed difference is in default
In numberical range, if within the scope of the default value, then trigger engine and engaged with the separation clutch in P2 module,
It is controlled so as to complete the coupling of engine power and P2 motor power.
Further, the starting control method can also include: to separate in conjunction with clutch in the engine with described
Afterwards, closed-loop control is carried out based on oil pressure of the rotational speed difference between the engine and the motor to the separation clutch, with
Toilet is stated rotational speed difference and is in the preset range of speeds.It should be noted that rotational speed difference as feedback quantity and then is formed herein
Closed-loop control, according to loop control theory it is found that controlled volume can be stable in a certain range in the i.e. preset range of speeds,
So as to realize the accurate control to engine speed.
When starting the engine being in close state using scheme provided by the invention, starter motor first accelerates to engine
First revolving speed, then from engine autonomous operation and to engine expectation revolving speed approach, so that even if vehicle remaining capacity
When insufficient, it still is able to provide torque jointly by engine and motor to meet the torque demand of vehicle acceleration.
Further, it is in the engine approach engine expectation Rotation Process due to " the second revolving speed ", is based on
Speed closed loop control mode reaches currently practical revolving speed when stable state.In practical application, engine controller controls are started
Machine is approached towards default engine speed, may not be with institute but reach the actual speed after stable state i.e. " the second revolving speed "
Preset " engine expectation revolving speed " numerical value is identical.
As shown in figure 3, the starting control method can also include following step after engine accelerates to the second revolving speed
It is rapid:
S105: judging whether engine expectation revolving speed is greater than the threshold engine speed, if it is, into the
One control flow S106, if it is not, then into the second control flow S107.
Wherein, the first control flow S106 are as follows:
(i) engine current torque is calculated according to second revolving speed and the engine load.
(ii) time needed for receiving the expectation synchronous rotational speed of the entire car controller transmission and reaching the expectation revolving speed
Period.
(iii) torque increase for promoting revolving speed is calculated according to the expectation synchronous rotational speed and the time cycle.
(iv) speed control is carried out to the engine according to the current torque and the torque increase.
The second control flow S107 are as follows: speed is carried out to the engine using the engine idling of the engine
Control.
(a) and Fig. 4 (b) referring to fig. 4, respectively based on starting control provided by the first control flow and the second control flow
Actual engine speed curve graph under system.As can be seen that the engine idling of engine is 100 turns smaller than engine expectation revolving speed
Per minute.Certainly, the embodiment of the present invention is needed without being defined to the specific value of engine idling according to the hard of engine
Depending on part situation.
Further, the starting control method further include: in advance under different engine water temperatures air inflow, oil spout because
Son is demarcated, and engine speed is controlled according to engine water temperature, air inflow, the oil spout factor, to be guaranteed at different engines
The engine of water temperature can go up punching to the threshold engine speed when accelerating.
Referring to Fig. 5, Fig. 6, wherein figure 5 show startup stage ideal engine speed variation tendencies, and Fig. 6, which is shown, to be opened
Dynamic stage ideal air-fuel ratio variation tendency.Specifically, according to the air fuel ratio signal that linear oxygen sensors measurement obtains, generally
, chemically correct fuel 14.7 shows that the proportion of air at this time and gasoline is optimal, can be realized completely burned, in addition the air-fuel
Signal is collected by air-fuel ratio measuring instrument and is fed back in engine controller.
Can be seen that relationship between the two from Fig. 5 and Fig. 6: engine speed is phenomenon, and default air inflow and oil spout
The complex optimum of modifying factor is then crucial security mechanism, it should be noted that although ignition advance angle is also an influence
Factor, but opened loop control is often carried out according to this key influence factor of engine water temperature in practical application, therefore ignore herein a little
The influence of fiery advance angle.For engine speed, those skilled in the art wish to have when starting reasonable upper punching with
Guarantee starting safety, in order to realize this target, in the preset air amount and Fig. 6 when needing to starting the engine design phase
The oil spout modifying factor in stage 1 optimize；There cannot be the lower overshoot of revolving speed when falling after rise from the highest point of upper punching, i.e., it cannot be low
The oil spout to the stage 2 and 3 in Fig. 6 is needed to repair in order to realize this target in engine shown in dotted lines in Figure 5 expectation revolving speed
Positive divisor optimizes, to guarantee that air-fuel ratio should not be partially dilute and revolving speed is caused to be shaken.
Specifically, table 1 to table 4 gives the practical mark between default air inflow, oil spout modifying factor and engine water temperature
The example of fixed number evidence is as follows:
Table 1 presets the nominal data of air inflow and engine water temperature
| Water temperature (DEG C) | -30 | -20 | -10 | 0 | 10 | 25 | 40 | 60 | 100 |
| Default air inflow (kg/h) | 30 | 27 | 22 | 18 | 17 | 12 | 10 | 10 | 8 |
The nominal data of table 2 the first stage oil spout factor and engine water temperature shown in fig. 6
| Water temperature (DEG C) | -30 | -20 | -10 | 0 | 10 | 25 | 40 | 60 | 100 |
| Oil spout modifying factor | 3.5 | 3.0 | 2.7 | 2.1 | 1.7 | 1.4 | 1.0 | 0.9 | 0.8 |
The nominal data of table 3 the first stage oil spout factor and engine water temperature shown in fig. 6
| Water temperature (DEG C) | -30 | -20 | -10 | 0 | 10 | 25 | 40 | 60 | 100 |
| Oil spout modifying factor | 3.5 | 3.0 | 2.7 | 2.1 | 1.7 | 1.4 | 1.0 | 0.9 | 0.8 |
The nominal data of table 4 the first stage oil spout factor and engine water temperature shown in fig. 6
| Water temperature (DEG C) | -30 | -20 | -10 | 0 | 10 | 25 | 40 | 60 | 100 |
| Oil spout modifying factor | 1.2 | 0.9 | 0.85 | 0.8 | 0.8 | 0.6 | 0.6 | 0.45 | 0.4 |
When starting the engine being in close state with scheme provided by the invention, in addition to having the implementation of method shown in Fig. 1
Except whole beneficial effects of example, it can also it is expected according to engine big between revolving speed and set threshold engine speed
Small relationship designs different engine accelerated process i.e. the first control flow and the second control flow, can be for engine
Specific operating condition carries out targetedly starting control, in addition, due to having carried out the air inflow under different engine water temperatures, spray in advance
The oily factor is demarcated, and thereby may be ensured that can go up punching when the engine of different engine water temperatures accelerates starts to described
Machine rotary speed threshold value provides guarantee for engine start.
As shown in fig. 7, for a kind of structural schematic diagram for starting control system provided in an embodiment of the present invention, the starting control
System processed include: engine controller 210, entire car controller 220, starter motor 230, engine 240, motor 250 and separate from
Clutch 260.
Wherein, the entire car controller 220, the enabling signal sent for receiving the engine controller 210, is connecing
It receives and controls the starter motor 230 after the enabling signal the first revolving speed is accelerated to the engine 240.
The engine controller 210, for controlling the starter motor when current residual electricity is less than low battery threshold value
230 dragging engines 240 accelerate to the first revolving speed；When the current rotating speed of the engine 240 reaches the first revolving speed, Xiang Suoshu
Engine 240 sends engine ignition signal, so that the engine 240 enters the autonomous operation stage；Based on preset hair
Motivation expectation revolving speed controls the engine 240 and accelerates to the second revolving speed.
When the engine 240 reaches second revolving speed, in conjunction with separation clutch to complete engine power and P2
The coupling of motor power controls, wherein first revolving speed is the revolving speed that the engine 240 enters utonomous working state, institute
It states the second revolving speed and is approached for the engine 240 and reached in the engine expectation Rotation Process, based on speed closed loop control mode
Currently practical revolving speed when to stable state.
It should be noted that the dotted line frame in Fig. 7 indicates P2 module.
Specifically, the entire car controller 220, for being calculated according to the speed and gear speed ratio information of target vehicle
The motor it is expected revolving speed, and the motor being calculated expectation revolving speed is sent to the engine controller 210；It is described
Engine controller 210 it is expected revolving speed for receiving the motor that the entire car controller 220 is sent, and by the motor
It is expected that revolving speed is set as engine expectation revolving speed.
Specifically, the entire car controller 220, which calculates the motor according to following formula, it is expected revolving speed ndes:
Wherein, v is the current vehicle speed of target vehicle, i0For base ratio, idesFor the speed ratio or downshift for being currently located gear
The speed ratio of gear where after processing.
Further, the engine controller 210 is also used to after the engine 240 accelerates to the second revolving speed,
Judging whether the engine expectation revolving speed is greater than the threshold engine speed, fruit is, then into the first control flow, if
It is no, then enter the second control flow.
Wherein, first control flow are as follows:
Engine current torque is calculated according to second revolving speed and the engine load；
Week time needed for receiving the expectation synchronous rotational speed of the transmission of entire car controller 220 and reaching the expectation revolving speed
Phase；
The torque increase for promoting revolving speed is calculated according to the expectation synchronous rotational speed and the time cycle, according to described
Current torque and the torque increase carry out speed control to the engine 240；
Second control flow are as follows:
Speed control is carried out to the engine 240 using the engine idling of the engine 240.
When starting the engine being in close state using scheme provided by the invention, starter motor first accelerates to engine
First revolving speed, then from engine autonomous operation and to engine expectation revolving speed approach, so that even if vehicle remaining capacity
When insufficient, it still is able to provide torque jointly by engine and motor to meet the torque demand of vehicle acceleration.
For system embodiments, since it is substantially similar to the method embodiment, related so describing fairly simple
Place illustrates referring to the part of embodiment of the method.Each embodiment should not be interpreted as limitation of the invention.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
Those of ordinary skill in the art will appreciate that all or part of the steps in realization above method embodiment is can
It is completed with instructing relevant hardware by program, the program can store in computer-readable storage medium,
Storage medium designated herein, such as: ROM/RAM, magnetic disk, CD.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention
It is interior.
Claims (8)
1. a kind of starting control method, which is characterized in that the starting control method includes:
When current residual electricity is less than low battery threshold value, control starter motor dragging engine accelerates to the first revolving speed, wherein institute
Stating the first revolving speed is the revolving speed that the engine enters utonomous working state；
When the current rotating speed of the engine reaches the first revolving speed, Xiang Suoshu engine sends engine ignition signal, so that
The engine enters the autonomous operation stage；
The engine is controlled based on preset engine expectation revolving speed and accelerates to the second revolving speed, wherein second revolving speed is
The engine approaches working as in the engine expectation Rotation Process, when reaching stable state based on speed closed loop control mode
Preceding actual speed；
When the engine reaches second revolving speed, in conjunction with separation clutch to complete engine power and P2 motor power
Coupling control；
The engine accelerates to after the second revolving speed, the starting control method further include:
Judge whether the engine expectation revolving speed is greater than the threshold engine speed, if it is, into the first control stream
Journey, if it is not, then into the second control flow；Wherein,
First control flow are as follows:
Engine current torque is calculated according to second revolving speed and the engine load；
Time cycle needed for receiving the expectation synchronous rotational speed of entire car controller transmission and reaching the expectation revolving speed；
The torque increase for promoting revolving speed is calculated according to the expectation synchronous rotational speed and the time cycle；
Speed control is carried out to the engine according to the current torque and the torque increase；
Second control flow are as follows:
Speed control is carried out to the engine using the engine idling of the engine.
2. starting control method according to claim 1, which is characterized in that the preset engine expectation revolving speed obtains
The method is taken to include:
Revolving speed it is expected according to the speed of target vehicle and gear speed ratio acquisition of information motor；
Motor expectation revolving speed is set as engine expectation revolving speed.
3. starting control method according to claim 2, which is characterized in that calculate the motor phase according to following formula
Hope revolving speed ndes:
Wherein, v is the current vehicle speed of target vehicle, i0For base ratio, idesFor the speed ratio or downshift processing for being currently located gear
The speed ratio of gear where afterwards.
4. starting control method according to claim 1, which is characterized in that the starting control method further include:
Air inflow, the oil spout factor under different engine water temperatures are demarcated in advance；
Engine speed is controlled according to engine water temperature, air inflow, the oil spout factor.
5. starting control method according to claim 1, which is characterized in that the starting control method further include:
In the engine after described separate in conjunction with clutch, based on the rotational speed difference pair between the engine and the motor
The oil pressure of the separation clutch carries out closed-loop control.
6. a kind of starting control system, which is characterized in that the starting control system includes: engine controller, full-vehicle control
Device, starter motor, engine, motor and separation clutch；Wherein,
The entire car controller, the enabling signal sent for receiving the engine controller are receiving the starting letter
The starter motor is controlled after number, and the first revolving speed is accelerated to the engine；
The engine controller, for when current residual electricity is less than low battery threshold value, controlling the starter motor dragging hair
Motivation accelerates to the first revolving speed；When the current rotating speed of the engine reaches the first revolving speed, Xiang Suoshu engine starts
Machine ignition signal, so that the engine enters the autonomous operation stage；The hair is controlled based on preset engine expectation revolving speed
Motivation accelerates to the second revolving speed；
When the engine reaches second revolving speed, in conjunction with separation clutch to complete engine power and P2 motor power
Coupling control, wherein first revolving speed is that the engine enters the revolving speed of utonomous working state, and second revolving speed is
The engine approaches working as in the engine expectation Rotation Process, when reaching stable state based on speed closed loop control mode
Preceding actual speed；
The engine controller is also used to after the engine accelerates to the second revolving speed, judges the engine expectation
Whether revolving speed is greater than the threshold engine speed, if it is, into the first control flow, if it is not, then into the second control
Process processed；Wherein,
First control flow are as follows:
Engine current torque is calculated according to second revolving speed and the engine load；
Time cycle needed for receiving the expectation synchronous rotational speed of the entire car controller transmission and reaching the expectation revolving speed；
The torque increase for promoting revolving speed is calculated according to the expectation synchronous rotational speed and the time cycle, according to described current
Torque and the torque increase carry out speed control to the engine；
Second control flow are as follows:
Speed control is carried out to the engine using the engine idling of the engine.
7. starting control system according to claim 6, which is characterized in that
Motor expectation revolving speed is calculated for the speed and gear speed ratio information according to target vehicle in the entire car controller,
And the motor being calculated expectation revolving speed is sent to the engine controller；
The engine controller it is expected revolving speed for receiving the motor that the entire car controller is sent, and by the electricity
Machine expectation revolving speed is set as engine expectation revolving speed.
8. starting control system according to claim 7, which is characterized in that
The entire car controller calculates the motor according to following formula and it is expected revolving speed ndes:
Wherein, v is the current vehicle speed of target vehicle, i0For base ratio, idesFor the speed ratio or downshift processing for being currently located gear
The speed ratio of gear where afterwards.
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| CN110778436B (en) * | 2019-09-30 | 2021-10-08 | 潍柴动力股份有限公司 | Control method and control device for starting engine |
| CN111114531B (en) * | 2019-12-31 | 2021-07-13 | 苏州海格新能源汽车电控系统科技有限公司 | Limp-home method and control system of hybrid power system based on P2 structure |
| CN113954815B (en) * | 2021-02-18 | 2023-04-07 | 长城汽车股份有限公司 | Engine start control method |
| CN112810598A (en) * | 2021-02-22 | 2021-05-18 | 东风柳州汽车有限公司 | Control method, device and equipment for clutch synchronization and storage medium |
| CN114228691A (en) * | 2021-12-03 | 2022-03-25 | 清华大学苏州汽车研究院（吴江） | Dynamic coordination control method and device for engine of hybrid electric vehicle |
| CN114909228B (en) * | 2022-05-27 | 2023-06-27 | 中国第一汽车股份有限公司 | Engine start control method and device, hybrid vehicle and storage medium |
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| WO2011021517A1 (en) * | 2009-08-21 | 2011-02-24 | 本田技研工業株式会社 | Engine starting control device for hybrid vehicle |
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