CN105292110A - Vehicle energy saving control method - Google Patents
Vehicle energy saving control method Download PDFInfo
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- CN105292110A CN105292110A CN201510658813.4A CN201510658813A CN105292110A CN 105292110 A CN105292110 A CN 105292110A CN 201510658813 A CN201510658813 A CN 201510658813A CN 105292110 A CN105292110 A CN 105292110A
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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
- 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
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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
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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
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/08—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to drivers or passengers
- B60W40/09—Driving style or behaviour
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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
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/10—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to vehicle motion
- B60W40/105—Speed
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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
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/08—Interaction between the driver and the control system
- B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
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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
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/08—Interaction between the driver and the control system
- B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
- B60W2050/143—Alarm means
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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
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/08—Interaction between the driver and the control system
- B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
- B60W2050/146—Display means
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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
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/10—Change speed gearings
- B60W2510/1005—Transmission ratio engaged
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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
- B60W2540/00—Input parameters relating to occupants
- B60W2540/10—Accelerator pedal position
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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
- B60W2540/00—Input parameters relating to occupants
- B60W2540/12—Brake pedal position
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- 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
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- 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
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/84—Data processing systems or methods, management, administration
Abstract
The invention provides a vehicle energy saving control method. The method comprises the following steps: acquiring sliding working condition operating parameters; judging whether the sliding working condition operating parameters satisfy a sliding working condition entry condition; starting an engine stop mode when the sliding working condition operating parameters satisfy the sliding working condition entry condition; acquiring gear change parameters when the sliding working condition operating parameters satisfy a sliding working condition exit condition; determining an optimal gear according to the gear change parameters and preset shifting strategy rules, and reminding a driver to switch the gear to the optimal gear; acquiring engine speed change parameters; determining a target engine speed according to the engine speed change parameters and driving the engine to reach the target engine speed. The vehicle energy saving control method provided by the invention has the advantages of reducing fuel consumption and improving oil saving effect.
Description
Technical field
The present invention relates to automobile energy-saving technology, particularly relate to a kind of vehicle energy saving control method.
Background technology
At present, in view of the problem of the whole world to energy shortage and environmental pollution is all paid much attention to, requirement for the energy saving standard of automobile is also more and more higher, hybrid power system is applied in increasing automobile, by combustion engine and the work of drive motor coordinated drive automotive engine, can complete-vehicle oil consumption be reduced significantly and reduce exhaust emission.
The hybrid vehicle of automatic speed changing and hand gear has the ability controlling driving engine shutdown or oil-break when the speed of a motor vehicle is zero usually; such as in the process of the red lights such as parking; when the hybrid power control setup in automobile learns that the speed of a motor vehicle is zero; control driving engine is shut down; or cut off the fuel delivery of driving engine; after automobile restarts, then drive engine operation and recover fuel delivery, reaching the effect of fuel-economizing.
In addition, self-shifting hybrid vehicle also possesses the ability controlling driving engine shutdown or oil-break in automobile slide process, and automatically regulates gear to matching with the speed of a motor vehicle when exiting coasting mode, can reduce oil consumption further.But for the hybrid vehicle of hand gear, due to the front and back at coasting mode, the speed of a motor vehicle there occurs larger change, the gear after coasting mode is caused no longer to match with current vehicle speed, need to rely on chaufeur manually to shift gears, this proposes higher requirement to the driving experience of chaufeur, therefore, the hybrid vehicle of hand gear does not also have this ability at present, and the effect of fuel-economizing need to improve.
Summary of the invention
The invention provides a kind of vehicle energy saving control method, can fuel oil consumption be reduced, improve oil-saving effect.
The embodiment of the present invention provides a kind of vehicle energy saving control method, comprising:
Obtain coasting mode operational factor;
Judge whether described coasting mode operational factor meets coasting mode entry condition;
When judging that described coasting mode operational factor meets coasting mode entry condition, then start the engine constantly running pattern;
Judge whether described coasting mode operational factor meets coasting mode exit criteria;
When judging that described coasting mode operational factor meets coasting mode exit criteria, obtain gear change parameter;
Determine best gear according to described gear change parameter and default Shifting rule and point out chaufeur to change to described best gear by gear;
Obtain engine speed change parameter;
According to the rotating speed of target of described engine speed change parameter determination driving engine, and driving engine is driven to reach described rotating speed of target.
Vehicle energy saving control method as above, described start the engine constantly running pattern, comprising:
Obtain transmission gear state;
Judge whether transmission gear state is neutral position state;
When judging that transmission gear state is neutral position state, then control driving engine to shutdown mode;
When judging that transmission gear state is not neutral position state, then control driving engine to oil-break pattern.
Vehicle energy saving control method as above, described control driving engine, to oil-break pattern, comprising:
Obtain the dump energy of electrokinetic cell;
Judge whether described dump energy is greater than electricity lower limit;
When judging that described dump energy is greater than electricity lower limit, then control driving engine oil-break, and control drive motor enters power-assisted operational mode;
When judging that described dump energy is less than or equal to electricity lower limit, then control driving engine oil-break, and control drive motor enters battery charging mode according to user.
Vehicle energy saving control method as above, coasting mode operational factor comprises: Das Gaspedal state, brake pedal status and the speed of a motor vehicle; Judge whether described coasting mode operational factor meets coasting mode entry condition, comprising:
Judge whether Das Gaspedal state and brake pedal status are releasing orientation and whether the speed of a motor vehicle is non-vanishing, if so, then meet coasting mode entry condition; If not, then coasting mode entry condition is not met.
Vehicle energy saving control method as above, judges whether described coasting mode operational factor meets coasting mode exit criteria, comprising:
Judge that whether at least one in Das Gaspedal state, brake pedal status be for stepping on state, or whether the speed of a motor vehicle is zero, if so, then meets coasting mode exit criteria; If not, then coasting mode exit criteria is not met.
Vehicle energy saving control method as above, described gear change parameter comprises: accelerator open degree and the speed of a motor vehicle; Determine best gear according to described gear change parameter and default Shifting rule and point out chaufeur to change gear to described best gear, comprising:
The gear corresponding with described accelerator open degree and the speed of a motor vehicle is searched, as best gear in Shifting rule;
Prompting chaufeur cut-off clutch;
Gear is changed to described best gear by prompting chaufeur.
Vehicle energy saving control method as above, described engine speed change parameter comprises: the speed of a motor vehicle and best gear.
Vehicle energy saving control method as above, described driving driving engine reaches described rotating speed of target, comprising:
Judge whether the current rotating speed of driving engine is less than idling;
When judging that described current rotating speed is less than idling, then by drive motor start the engine, and driving engine is dragged to rotating speed of target;
When judging that the current rotating speed of lawsuit is more than or equal to idling, then by engine management system, driving engine is dragged to rotating speed of target.
Vehicle energy saving control method as above, after driving driving engine reaches described rotating speed of target, also comprises:
Prompting chaufeur is in conjunction with power-transfer clutch.
When the technical scheme that the embodiment of the present invention provides is by judging that coasting mode operational factor meets coasting mode entry condition, driving engine is adjusted to constantly running pattern, that is: stop turn of engine or stop driving engine oil spout, the inertia of automobile self is relied on to keep automobile to continue to travel, to reduce fuel oil consumption, improve oil-saving effect; And judge when coasting mode operational factor meets coasting mode exit criteria, determine best gear according to gear change parameter and default Shifting rule and point out chaufeur to change to best gear by gear; Then according to engine speed change parameter by engine drive to reaching the rotating speed of target mated with best gear, coordinate to make driving engine and change-speed box and realize optimum operational effect, reduce engine wear.
Accompanying drawing explanation
The structural representation of a kind of power drive system assembly that Fig. 1 provides for the embodiment of the present invention one;
The structural representation of the another kind of power drive system assembly that Fig. 2 provides for the embodiment of the present invention one;
The diagram of circuit of the vehicle energy saving control method that Fig. 3 provides for the embodiment of the present invention one;
The diagram of circuit of the vehicle energy saving control method that Fig. 4 provides for the embodiment of the present invention two;
The diagram of circuit of another vehicle energy saving control method that Fig. 5 provides for the embodiment of the present invention two;
The diagram of circuit of the method for shifting gears is carried out when being about to exit coasting mode in the vehicle energy saving control method that Fig. 6 provides for the embodiment of the present invention three;
The signal input and output schematic diagram of hybrid power system control unit in the vehicle energy saving control method that Fig. 7 provides for the embodiment of the present invention three.
Reference numeral:
1-hybrid power system control unit; 2-read-out; 3-neutral position switch;
4-electrokinetic cell; 5-drive motor; 6-driving engine;
7-change-speed box.
Detailed description of the invention
Embodiment one
The present embodiment provides a kind of vehicle energy saving control method, is applicable to the automobile being furnished with hand-operated transmission, can engine fuel be stopped when automobile enters coasting mode to supply, also just reach energy-conservation effect; Further, chaufeur can be pointed out after automobile exits coasting mode in time to adjust gear to match with engine speed, to make engine operation in optimum regime.
The vehicle energy saving control method that the present embodiment provides is not only applicable to the hybrid power system of high pressure (operating voltage is more than or equal to 60V), also be applicable to the hybrid power system of low pressure (operating voltage is less than 60V), and applicable equally for the system of carrying 12V/24V intelligent generator.And the vehicle energy saving control method that the present embodiment provides is not only applicable to drive motor is connected to engine crankshaft belt wheel structure by belt, is also applicable to the structure that drive motor is directly fixed on engine flywheel end.
The structural representation of a kind of power drive system assembly that Fig. 1 provides for the embodiment of the present invention one, the structural representation of the another kind of power drive system assembly that Fig. 2 provides for the embodiment of the present invention one.
As depicted in figs. 1 and 2, this power drive system assembly is the structure be applied in hybrid vehicle, comprises hybrid power system control unit 1, read-out 2, neutral position switch 3, electrokinetic cell 4, drive motor 5, driving engine 6, change-speed box 7 etc.Wherein, read-out 2, for pointing out driver state parameter, is electrically connected with hybrid power system control unit 1.Neutral position switch 3 is arranged on change-speed box 7, whether is in neutral position state for detecting change-speed box 7.
Electrokinetic cell 4 is connected with drive motor 5, can power to drive motor 5, or drive motor 5 pairs of electrokinetic cells 4 charge.Drive motor 5 and driving engine 6 have two kinds of connection modes:
One, as shown in Figure 1, drive motor 5 is integrated to be arranged on driving engine 6 and to take turns and fasten, that is: drive motor 5 realizes the power coupling with driving engine 6 by belt.
Its two, as shown in Figure 2, drive motor 5 is integrated in the mouth of driving engine 6, is specifically connected with the flywheel of driving engine 6, realizes the power coupling of drive motor 5 and driving engine 6.
Above-mentioned read-out 2 points out chaufeur by the mode of interface display, and the mode of the audio frequency apparatus sound such as loud speaker can certainly be adopted to point out chaufeur, or the mode adopting read-out 2 and audio frequency apparatus to combine.
The diagram of circuit of the vehicle energy saving control method that Fig. 3 provides for the embodiment of the present invention one.The vehicle energy saving control method that the present embodiment provides can be performed by hybrid power system control unit, can be realized by the mode of software and/or hardware.As shown in Figure 3, the vehicle energy saving control method that the present embodiment provides, comprises following several step:
Step 10, acquisition coasting mode operational factor.
Step 20, judge whether coasting mode operational factor meets coasting mode entry condition.
Step 30, when judging that coasting mode operational factor meets coasting mode entry condition, then start the engine constantly running pattern.
The function of above-mentioned three steps be realize automotive operation at coasting mode time, by driving engine constantly running, also namely stop turn of engine or stop driving engine oil spout, relying on the inertia of automobile self to keep automobile to continue to travel, to reduce fuel oil consumption.
Concrete, judge whether automobile is in coasting mode, can obtain coasting mode operational factor and judge.Wherein, coasting mode operational factor can be: Das Gaspedal state, brake pedal status and the speed of a motor vehicle.Judge whether coasting mode operational factor meets coasting mode entry condition, is specifically as follows: judge whether Das Gaspedal state and brake pedal status are releasing orientation and whether the speed of a motor vehicle is non-vanishing, if so, then meet coasting mode entry condition; If not, then coasting mode entry condition is not met.That is: when Das Gaspedal state be releasing orientation, brake pedal status also for releasing orientation and the speed of a motor vehicle non-vanishing time, being considered as coasting mode operational factor meets coasting mode entry condition; And any one working as in Das Gaspedal state, brake pedal status is in the state of stepping on or the speed of a motor vehicle is zero, be then considered as coasting mode operational factor and do not meet coasting mode entry condition.
Above-mentioned Das Gaspedal state, brake pedal status and the speed of a motor vehicle can be used for cited by the present embodiment, judge several parameters of coasting mode, and those skilled in the art also can adopt other parameter to judge coasting mode.For above-mentioned Das Gaspedal state, brake pedal status and the speed of a motor vehicle three parameters, can detect by arranging sensor on corresponding mechanical component, or directly utilize the existing sensor of automotive interior to detect.
When judging that coasting mode operational factor meets coasting mode entry condition, then start the engine constantly running pattern, that is: be adjusted to constantly running pattern by the running state of driving engine, and this pattern can make engine stop rotate or stop oil spout.If coasting mode operational factor does not meet coasting mode entry condition, then return and again coasting mode operational factor is obtained and judge.In automobile slide process, keep engine operation in constantly running pattern, and perform following steps:
Step 40, judge whether coasting mode operational factor meets coasting mode exit criteria.
For the above-mentioned coasting mode operational factor comprising Das Gaspedal state, brake pedal status, the speed of a motor vehicle three parameters, judge whether it meets coasting mode exit criteria, specifically can judge that whether at least one in Das Gaspedal state, brake pedal status be for stepping on state, or whether the speed of a motor vehicle is zero, if so, coasting mode exit criteria is then met; If not, then coasting mode exit criteria is not met.That is: when Das Gaspedal state is for stepping on state, or brake pedal status is for stepping on state, or the speed of a motor vehicle is zero, be then considered as meeting coasting mode exit criteria; Be still releasing orientation and the speed of a motor vehicle is non-vanishing when Das Gaspedal state is still releasing orientation, brake pedal status, be then considered as not meeting coasting mode exit criteria, be still in coasting mode.
Step 50, when judging that coasting mode operational factor meets coasting mode exit criteria, obtain gear change parameter.
Step 60, determine best gear according to gear change parameter and default Shifting rule and point out chaufeur to change gear to best gear.
The object of step 50 and step 60 determines the best gear of this running state applicable, and point out chaufeur.Concrete, gear change parameter can be: accelerator open degree and the speed of a motor vehicle.Usually, in vehicle traveling process, accelerator open degree and the speed of a motor vehicle need to match with the gear of change-speed box 7, and gear need improve according to the increase of accelerator open degree and the speed of a motor vehicle, just can guarantee that engine speed combines with change-speed box 7 and reach best operational effect, avoid engine wear.The relation of gear and accelerator open degree and the speed of a motor vehicle is namely as Shifting rule, and this relation can be stored in hybrid power system control unit as a form.
Because automobile is rely on automobile inertial to slide in coasting mode, by the impact of road friction power, the speed of a motor vehicle can reduce.Exit coasting mode to mean and restart driving engine, then the gear of change-speed box 7 must be adjusted to the gear matched with current vehicle speed, be referred to as best gear.
Acquisition accelerator open degree and the speed of a motor vehicle are as gear change parameter, the gear corresponding with accelerator open degree and the speed of a motor vehicle is searched in the Shifting rule preset, as best gear, and by read-out 2 or other audio frequency apparatus prompting chaufeur cut-off clutch, then point out chaufeur to change gear to best gear.
Step 70, acquisition engine speed change parameter.
Step 80, rotating speed of target according to engine speed change parameter determination driving engine, and drive driving engine to reach rotating speed of target.
Engine speed change parameter can be the speed of a motor vehicle and best gear, then the rotating speed of target of driving engine is calculated according to the speed of a motor vehicle and best gear, and drive driving engine to reach rotating speed of target, to make engine speed and best gear match, realize optimized operation effect.
Driving engine is by engine management system (EngineManagementSystem, be called for short: EMS) carry out managing, EMS is connected with hybrid power system control unit 1, hybrid power system control unit 1 to EMS send rotating speed of target, by EMS by the adjustment of rotational speed of driving engine to rotating speed of target.
When the technical scheme that the present embodiment provides is by judging that coasting mode operational factor meets coasting mode entry condition, driving engine is adjusted to constantly running pattern, that is: stop turn of engine or stop driving engine oil spout, the inertia of automobile self is relied on to keep automobile to continue to travel, to reduce fuel oil consumption, improve oil-saving effect; And judge when coasting mode operational factor meets coasting mode exit criteria, determine best gear according to gear change parameter and default Shifting rule and point out chaufeur to change to best gear by gear; Then according to engine speed change parameter by engine drive to reaching the rotating speed of target mated with best gear, coordinate to make driving engine and change-speed box and realize optimum operational effect, reduce engine wear.
Embodiment two
The present embodiment is on the basis of above-described embodiment, has done further improvement to vehicle energy saving control method, has specifically done further improvement to the implementation of start the engine constantly running pattern:
The diagram of circuit of the vehicle energy saving control method that Fig. 4 provides for the embodiment of the present invention two.As shown in Figure 4, the vehicle energy saving control method that the present embodiment provides comprises the steps:
Step 10, acquisition coasting mode operational factor.
Step 20, judge whether coasting mode operational factor meets coasting mode entry condition.
The implementation of above-mentioned two steps can refer to embodiment one, repeats no more herein.
Step 301, when judging that coasting mode operational factor meets coasting mode entry condition, obtain transmission gear state.
By being arranged on neutral position switch 3 in change-speed box 7 to detect the shifting state of change-speed box 7.
Step 302, judge whether transmission gear state is neutral position state.
Step 303, when judging that transmission gear state is neutral position state, then control driving engine to shutdown mode.
When judging that change-speed box 7 shifting state is neutral position state, being then considered as sliding mode, controlling driving engine to shutdown mode, that is: control driving engine and shut down, make the rotating speed of driving engine reduce to zero rapidly.
Step 304, when judging transmission gear state for neutral position state, then control driving engine to oil-break pattern.
Control driving engine to oil-break pattern, that is: stop driving engine oil spout, but driving engine is still in rotation.
Hybrid power system control unit 1 also controls drive motor and is in free state, neither provides lock torque, does not also provide drive torque.
Wherein, above-mentioned steps 304 can also adopt implementation below:
The diagram of circuit of another vehicle energy saving control method that Fig. 5 provides for the embodiment of the present invention two.As shown in Figure 5, control driving engine to oil-break pattern, specifically comprise following several step:
The dump energy of step 3041, acquisition electrokinetic cell.
Step 3042, judge whether dump energy is greater than electricity lower limit.
Step 3043, when judging that dump energy is greater than electricity lower limit, then control driving engine oil-break.
Step 3044, control drive motor enter power-assisted operational mode.
When the dump energy of electrokinetic cell is greater than electricity lower limit, be considered as band gear and slide assistant mode, direct control driving engine oil-break, then control drive motor and produce power-assisted driving driving engine, to compensate the friction drag that driving engine increases in oil-break process, make under the dragging of car load and driving system, driving engine still maintains rotating speed.Drive motor is controlled by motor torque control system, and motor torque control system is connected with hybrid power system control unit 1, receives the control signal that hybrid power system control unit 1 is sent.
Step 3045, when judging that dump energy is less than or equal to electricity lower limit, then control driving engine oil-break.
Step 3046, control drive motor enter battery charging mode according to user.
When the dump energy of electrokinetic cell is less than or equal to electricity lower limit, is considered as band gear and slides charge mode, directly control driving engine oil-break, under the dragging of car load and driving system, driving engine still maintains rotating speed.Except controlling driving engine oil-break, also need to control drive motor and enter power generation mode, electrokinetic cell is charged.Energy specifically by producing in the process of retroengine charges to electrokinetic cell.
The technical scheme that the present embodiment provides, on the basis of above-described embodiment one, when coasting mode operational factor meets coasting mode entry condition, judges shifting state, when being in neutral, controlling driving engine and shutting down; When not being in neutral, control driving engine oil-break; And also the dump energy of electrokinetic cell is judged when not being in neutral, produce power-assisted by drive motor to driving engine when electricity is enough to drive, when electricity deficiency, electrokinetic cell is charged, except possessing beneficial effect that embodiment one possesses, the cooperation of drive motor between driving engine and coordinating between drive motor with electrokinetic cell can also be utilized preferably, to make automobile realize optimum operational effect, reduce engine wear.
Embodiment three
On the basis of above-described embodiment, the present embodiment is further optimized the step after exiting coasting mode:
The diagram of circuit of the method for shifting gears is carried out when being about to exit coasting mode in the vehicle energy saving control method that Fig. 6 provides for the embodiment of the present invention three.As shown in Figure 6, the method for carrying out when being about to exit coasting mode shifting gears comprises:
Step 901, judge whether coasting mode operational factor meets coasting mode exit criteria.
The implementation of step 901 can refer to the step 40 in above-described embodiment, repeats no more herein.
Step 902, when judging that coasting mode operational factor meets coasting mode exit criteria, obtain gear change parameter.
Wherein, gear change parameter can comprise: accelerator open degree and the speed of a motor vehicle.
Then, determine best gear according to gear change parameter and default Shifting rule and point out chaufeur to change gear to best gear.Following steps specifically can be adopted to realize:
Step 903, in Shifting rule, search the gear corresponding with accelerator open degree and the speed of a motor vehicle, as best gear.
Such as when accelerator open degree is 30%, when the speed of a motor vehicle is 30Km/h, corresponding best gear is 3 gears.
Step 904, prompting chaufeur cut-off clutch.
Gear is changed to best gear by step 905, prompting chaufeur.
Then step 906 is performed.
Step 906, acquisition engine speed change parameter.
The implementation of step 906 can refer to the step 70 in above-described embodiment.Perform step 907 after step 906.
Step 907, rotating speed of target according to engine speed change parameter determination driving engine.
The implementation of step 907 can refer to the step 80 in above-described embodiment, repeats no more herein.After step 907, driving engine need be driven to reach rotating speed of target, following several step specifically can be adopted to realize.
Step 908, judge whether the current rotating speed of driving engine is less than idling.
Step 909, when judging that current rotating speed is less than idling, then by drive motor start the engine, and driving engine is dragged to rotating speed of target.
Step 910, when judging that current rotating speed is more than or equal to idling, then by engine management system, driving engine is dragged to rotating speed of target.
Further, after driving driving engine reaches rotating speed of target (also namely: after step 909 or 910), also comprise:
Step 911, prompting chaufeur are in conjunction with power-transfer clutch.
Make automobile exit sliding mode completely, recover normally to travel.
The technical scheme that the present embodiment provides, on the basis of the various embodiments described above, best gear is changed further by prompting chaufeur, and by engine drive to rotating speed of target, match with best gear, realize optimum operational effect to make driving engine and change-speed box coordinate, reduce engine wear, and reach fuel-efficient effect.
For the technical scheme provided in above-described embodiment, technical personnel can carry out the improvement of software and/or hardware to hybrid power system control unit 1.
The signal input and output schematic diagram of hybrid power system control unit in the vehicle energy saving control method that Fig. 7 provides for the embodiment of the present invention three.As shown in Figure 7, the incoming signal of hybrid power system control unit 1 comprises: the engine speed that the speed of a motor vehicle, engine management system provide, Das Gaspedal state, brake pedal status, shifting state etc.The output signal of hybrid power system control unit 1 comprises: best gear, rotating speed of target and drive motor control signal, and wherein, best gear is available to read-out 2 or audio frequency apparatus; Rotating speed of target is supply engine management system, and drive motor control signal is available to motor torque control system.
And hybrid power system control unit 1 is inner, be provided with that sliding mode enters, sliding mode controls and sliding mode exits three parts, sliding mode entering part can refer to step 10 in above-described embodiment and step 20, sliding mode control part can refer to step 301 in above-described embodiment to step 304, and sliding mode exits part and can refer to step 901 in above-described embodiment to step 911.Above-mentioned three sliding modes are by software simulating, and its concrete implementation can be realized according to the technological means known by technical personnel.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (9)
1. a vehicle energy saving control method, is characterized in that, comprising:
Obtain coasting mode operational factor;
Judge whether described coasting mode operational factor meets coasting mode entry condition;
When judging that described coasting mode operational factor meets coasting mode entry condition, then start the engine constantly running pattern;
Judge whether described coasting mode operational factor meets coasting mode exit criteria;
When judging that described coasting mode operational factor meets coasting mode exit criteria, obtain gear change parameter;
Determine best gear according to described gear change parameter and default Shifting rule and point out chaufeur to change to described best gear by gear;
Obtain engine speed change parameter;
According to the rotating speed of target of described engine speed change parameter determination driving engine, and driving engine is driven to reach described rotating speed of target.
2. vehicle energy saving control method according to claim 1, is characterized in that, described start the engine constantly running pattern, comprising:
Obtain transmission gear state;
Judge whether transmission gear state is neutral position state;
When judging that transmission gear state is neutral position state, then control driving engine to shutdown mode;
When judging that transmission gear state is not neutral position state, then control driving engine to oil-break pattern.
3. vehicle energy saving control method according to claim 2, is characterized in that, described control driving engine, to oil-break pattern, comprising:
Obtain the dump energy of electrokinetic cell;
Judge whether described dump energy is greater than electricity lower limit;
When judging that described dump energy is greater than electricity lower limit, then control driving engine oil-break, and control drive motor enters power-assisted operational mode;
When judging that described dump energy is less than or equal to electricity lower limit, then control driving engine oil-break, and control drive motor enters battery charging mode according to user.
4. vehicle energy saving control method according to claim 1, is characterized in that, coasting mode operational factor comprises: Das Gaspedal state, brake pedal status and the speed of a motor vehicle; Judge whether described coasting mode operational factor meets coasting mode entry condition, comprising:
Judge whether Das Gaspedal state and brake pedal status are releasing orientation and whether the speed of a motor vehicle is non-vanishing, if so, then meet coasting mode entry condition; If not, then coasting mode entry condition is not met.
5. vehicle energy saving control method according to claim 4, is characterized in that, judges whether described coasting mode operational factor meets coasting mode exit criteria, comprising:
Judge that whether at least one in Das Gaspedal state, brake pedal status be for stepping on state, or whether the speed of a motor vehicle is zero, if so, then meets coasting mode exit criteria; If not, then coasting mode exit criteria is not met.
6. vehicle energy saving control method according to claim 1, is characterized in that, described gear change parameter comprises: accelerator open degree and the speed of a motor vehicle; Determine best gear according to described gear change parameter and default Shifting rule and point out chaufeur to change gear to described best gear, comprising:
The gear corresponding with described accelerator open degree and the speed of a motor vehicle is searched, as best gear in Shifting rule;
Prompting chaufeur cut-off clutch;
Gear is changed to described best gear by prompting chaufeur.
7. vehicle energy saving control method according to claim 6, is characterized in that, described engine speed change parameter comprises: the speed of a motor vehicle and best gear.
8. vehicle energy saving control method according to claim 7, is characterized in that, described driving driving engine reaches described rotating speed of target, comprising:
Judge whether the current rotating speed of driving engine is less than idling;
When judging that described current rotating speed is less than idling, then by drive motor start the engine, and driving engine is dragged to rotating speed of target;
When judging that described current rotating speed is more than or equal to idling, then by engine management system, driving engine is dragged to rotating speed of target.
9. vehicle energy saving control method according to claim 8, is characterized in that, after driving driving engine reaches described rotating speed of target, also comprises:
Prompting chaufeur is in conjunction with power-transfer clutch.
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