CN104863773A - Engine warming-up control method and system for hybrid electric vehicle - Google Patents

Engine warming-up control method and system for hybrid electric vehicle Download PDF

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Publication number
CN104863773A
CN104863773A CN201410367148.9A CN201410367148A CN104863773A CN 104863773 A CN104863773 A CN 104863773A CN 201410367148 A CN201410367148 A CN 201410367148A CN 104863773 A CN104863773 A CN 104863773A
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preheating
engine warming
hybrid vehicle
mode
engine
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CN201410367148.9A
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Chinese (zh)
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CN104863773B (en
Inventor
吕朝鹏
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Beiqi Foton Motor Co Ltd
Beijing Treasure Car Co Ltd
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Beiqi Foton Motor Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N19/00—Starting aids for combustion engines, not otherwise provided for
    • F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
    • 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
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/20—Control strategies involving selection of hybrid configuration, e.g. selection between series or parallel configuration
    • 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
    • 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
    • B60W2510/24—Energy storage means
    • B60W2510/242—Energy storage means for electrical energy
    • B60W2510/244—Charge state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2540/00—Input parameters relating to occupants
    • B60W2540/10—Accelerator pedal position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/06—Combustion engines, Gas turbines

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Automation & Control Theory (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention provides an engine warming-up control method and system for a hybrid electric vehicle. According to the method, when the electric quantity of a vehicle-mounted battery of the hybrid electric vehicle is lower than a set threshold value, that is, the hybrid electric vehicle requires mode switching, whether engine warming up is required is judged according to a working mode switched from a pure electrode mode of the hybrid electric vehicle, an engine is warmed up if engine warming up is required, and the engine is started if engine warming up is not required. Therefore, the engine warming-up control method and system can control engine warming up according to the dynamically changed working mode of the hybrid electric vehicle, whether engine warming up is required continuously is judged constantly even through engine warming up is started, engine warming up is continued if engine warming up is required continuously, engine warming up is stopped and the engine is started if engine warming up is not required , engine warming up can be controlled effectively according to the actual operation state of the hybrid electric vehicle, pollutant emission is reduced, and the starting performance of the engine is improved.

Description

The engine warming up controlling method of hybrid vehicle and system
Technical field
The present invention relates to technical field of engine control.Relate in particular to a kind of engine warming up controlling method and system of hybrid vehicle.
Background technique
Hybrid vehicle (Hybrid Electric Vehicle, HEV) refers to and has at least two kinds of power sources, uses wherein one or more power sources to provide the vehicle of some or all of power.Hybrid vehicle has 3 kinds of travel operation patterns, i.e. electric-only mode, series model, paralleling model.The motor of hybrid vehicle only drive electrical generators generating under series model, the electric energy of generation passes to battery by control unit, then is transferred to motor by battery and is converted into kinetic energy, drives automobile finally by gear; Under paralleling model, the motor of hybrid vehicle is used for driving and generating simultaneously, and also namely motor role may be used for generating, may be used for driving, and also may two kinds of functions carry out simultaneously.When battery electric quantity is not enough, hybrid vehicle mode of operation will be switched to series model or paralleling model by electric-only mode.
The motor of common hybrid vehicle comprises diesel engine and petrol engine, when hybrid vehicle mode of operation is switched to series model or paralleling model by electric-only mode, need first ato unit, but startability is poor at low ambient temperatures for motor (especially diesel engine), pollutant emission is many, have a strong impact on environment, therefore, be necessary that before ato unit, carry out preheating reduces discharge to greatest extent and improve start-up performance.But the mode of operation of hybrid vehicle is not unalterable in running process, when need to carry out preheating to motor, preheating how long, when needing to stop preheating etc. neither be unalterable, and in prior art, lack the method that engine warming up is control effectively, therefore provide a kind of method that effectively can control engine warming up to be problem demanding prompt solution.
Summary of the invention
For this reason, technical problem to be solved by this invention is to lack the method control effectively to the engine warming up of hybrid vehicle in prior art, thus provide a kind of can to the engine warming up controlling method of the hybrid vehicle that engine warming up control effectively and system.
For solving the problems of the technologies described above, technological scheme of the present invention is as follows:
The invention provides a kind of engine warming up controlling method of hybrid vehicle, comprise the steps:
Obtain the electricity of the on-vehicle battery of described hybrid vehicle;
When described electricity is lower than setting threshold value, judge whether to need to carry out engine warming up from the mode of operation that electric-only mode will be switched to according to described hybrid vehicle, if then carry out preheating to motor, if not, then ato unit, the mode of operation that wherein will be switched to comprises series model and paralleling model.
The engine warming up controlling method of hybrid vehicle of the present invention, when the mode of operation that will be switched to is series model, judges to need to carry out engine warming up.
The engine warming up controlling method of hybrid vehicle of the present invention, when the mode of operation that will be switched to is paralleling model, first judge whether hybrid vehicle is in the situation of overtaking other vehicles or climbing, if then judge not need to carry out engine warming up, otherwise judge to need to carry out engine warming up.
The engine warming up controlling method of hybrid vehicle of the present invention, describedly judges whether hybrid vehicle is in the situation of overtaking other vehicles or climbing and comprises the steps:
Obtain accelerator pedal position variance ratio and vehicle present load moment of torsion;
By accelerator pedal position variance ratio compared with the calibration value preset, by vehicle present load moment of torsion compared with motor max. output torque, when accelerator pedal position variance ratio is greater than described calibration value, judge to be in the situation of overtaking other vehicles, when vehicle present load moment of torsion is greater than described motor max. output torque, judge the situation being in climbing.
The engine warming up controlling method of hybrid vehicle of the present invention, also comprises the steps: before carrying out preheating to motor
Judge whether preheating system for engine exists fault, if so, then direct ato unit export trouble signal; If not, then start to carry out preheating to motor.
The engine warming up controlling method of hybrid vehicle of the present invention, carries out preheating to motor and comprises the steps:
Obtain preheat time;
Preheating is carried out to motor, records the time of preheating and judge whether to need ato unit.
The engine warming up controlling method of hybrid vehicle of the present invention, described in judge whether to need ato unit to comprise:
When the mode of operation that will be switched to is series model, the time of described preheating was compared with described preheat time, when the time of described preheating is more than or equal to described preheat time, send preheating and complete ato unit after information, hybrid vehicle mode of operation switches to series model by electric-only mode, otherwise continues to carry out preheating to motor.
The engine warming up controlling method of hybrid vehicle of the present invention, described in judge whether to need ato unit to comprise:
When the mode of operation that will be switched to is paralleling model, judge whether hybrid vehicle is in the situation of overtaking other vehicles or climbing, and if so, then stops engine warming up, ato unit, hybrid vehicle mode of operation switches to paralleling model by electric-only mode; If not, then the time of described preheating was compared with described preheat time, when the time of described preheating is more than or equal to described preheat time, send preheating and complete ato unit after information, hybrid vehicle mode of operation switches to paralleling model by electric-only mode, otherwise continues to carry out preheating to motor.
The engine warming up controlling method of hybrid vehicle of the present invention, described acquisition comprises the steps: preheat time
Obtain engine water temperature, cell voltage and atmospheric pressure;
Table look-up acquisition first preheat time according to described cell voltage, table look-up acquisition second preheat time according to the gentle atmospheric pressure of described engine water;
By described first preheat time compared with described second preheat time, the smaller in both getting is as preheat time.
The engine warming up controlling method of hybrid vehicle of the present invention, also comprises the steps:
Setting stand-by period=preheat time+redundancy value, if do not send preheating in the described stand-by period yet to complete information, then direct ato unit.
Present invention also offers a kind of engine warming up control system, comprising:
Acquisition module, for obtaining the electricity of the on-vehicle battery of described hybrid vehicle;
Judge module, for when described electricity is lower than setting threshold value, judge whether to need to carry out engine warming up from the mode of operation that electric-only mode will be switched to according to described hybrid vehicle, if then carry out preheating to motor, if not, then ato unit, the mode of operation that wherein will be switched to comprises series model and paralleling model.
The engine warming up control system of hybrid vehicle of the present invention, described judge module comprises preheating judging unit, need to carry out engine warming up for judging whether, and when the mode of operation that will be switched to is series model, judge to need to carry out engine warming up.
The engine warming up control system of hybrid vehicle of the present invention, described judge module comprises preheating judging unit, need to carry out engine warming up for judging whether, and when the mode of operation that will be switched to is paralleling model, first judge whether hybrid vehicle is in the situation of overtaking other vehicles or climbing, if then judge not need to carry out engine warming up, otherwise judge to need to carry out engine warming up.
The engine warming up control system of hybrid vehicle of the present invention, described preheating judging unit comprises the first determining device, for judging whether hybrid vehicle is in the situation of overtaking other vehicles or climbing, and it comprises:
Acquisition device, for obtaining accelerator pedal position variance ratio and vehicle present load moment of torsion;
First judgment means, for by accelerator pedal position variance ratio compared with the calibration value preset, by vehicle present load moment of torsion compared with motor max. output torque, when accelerator pedal position variance ratio is greater than described calibration value, judge to be in the situation of overtaking other vehicles, when vehicle present load moment of torsion is greater than described motor max. output torque, judge the situation being in climbing.
The engine warming up control system of hybrid vehicle of the present invention, described judge module also comprises breakdown judge unit, for judging whether preheating system for engine exists fault, if so, then direct ato unit export trouble signal; If not, then start to carry out preheating to motor.
The engine warming up control system of hybrid vehicle of the present invention, described judge module comprises preheating unit, and it comprises;
Time getter, for obtaining preheat time;
Preheater, carrying out preheating for starting to motor, recording the time of preheating and judging whether to need ato unit.
The engine warming up control system of hybrid vehicle of the present invention, described preheater comprises the second judgment means, ato unit is needed for judging whether, when the mode of operation that will be switched to is series model, the time of described preheating was compared with described preheat time, when the time of described preheating is more than or equal to described preheat time, send preheating and complete ato unit after information, hybrid vehicle mode of operation switches to series model by electric-only mode, otherwise continues to carry out preheating to motor.
The engine warming up control system of hybrid vehicle of the present invention, described preheater comprises the second judgment means, ato unit is needed for judging whether, when the mode of operation that will be switched to is paralleling model, first judge whether hybrid vehicle is in the situation of overtaking other vehicles or climbing, if so, then engine warming up is stopped, ato unit; If not, then the time of described preheating was compared with described preheat time, when the time of described preheating is more than or equal to described preheat time, send preheating and complete ato unit after information, hybrid vehicle mode of operation switches to paralleling model by electric-only mode, otherwise continues to carry out preheating to motor.
The engine warming up control system of hybrid vehicle of the present invention, described time getter comprises:
Second acquisition device, for obtaining engine water temperature, cell voltage and atmospheric pressure;
Table look-up device, for tabling look-up acquisition first preheat time according to described cell voltage, tables look-up acquisition second preheat time according to the gentle atmospheric pressure of described engine water;
Value device, for by described first preheat time compared with described second preheat time, get smaller in both as preheat time.
The engine warming up control system of hybrid vehicle of the present invention, also comprises:
Timeout treatment module, for set stand-by period=preheat time+redundancy value, if do not send preheating in the described stand-by period yet to complete information, then direct ato unit.
Technique scheme of the present invention has the following advantages compared to existing technology:
(1) the engine warming up controlling method of hybrid vehicle of the present invention and system, when the electricity of the on-vehicle battery of hybrid vehicle is lower than setting threshold value, also namely hybrid vehicle have pattern to switch demand time, can judge whether to need to carry out engine warming up from the mode of operation that electric-only mode will be switched to according to hybrid vehicle, if just preheating can be carried out to motor, ato unit if not.Therefore, engine warming up controlling method of the present invention and system, engine warming up can be controlled according to the hybrid vehicle mode of operation of dynamic change, even and if start engine warming up, also can judge whether constantly to need to proceed engine warming up, if desired will continue to carry out preheating to motor, if will engine warming up be stopped when not needing, ato unit, effectively engine warming up can be controlled according to the actual motion state of hybrid vehicle, reduce the discharge of pollutant, improve the startability of motor.
(2) the engine warming up controlling method of hybrid vehicle of the present invention and system, when the mode of operation that will be switched to is paralleling model, can first judge whether hybrid vehicle is in the situation of overtaking other vehicles or climbing, if, then judge not need to carry out engine warming up, direct ato unit.Because under paralleling model, motor also can be used for driving, and when hybrid vehicle is in the situation of overtaking other vehicles or climbing, needs to provide larger driving force, now needs ato unit as early as possible to eliminate the step of engine warming up to increase driving force.Therefore, engine warming up controlling method of the present invention and system, considered the mode of operation of hybrid vehicle and residing environment, provides the most practical optimum engine warming up controlling method.
(3) the engine warming up controlling method of hybrid vehicle of the present invention and system, by by accelerator pedal position variance ratio compared with the calibration value preset, by vehicle present load moment of torsion compared with motor max. output torque, when accelerator pedal position variance ratio is greater than described calibration value, just can judge to be in the situation of overtaking other vehicles, when vehicle present load moment of torsion is greater than described motor max. output torque, the situation being in climbing just can be judged.Therefore engine warming up controlling method of the present invention and system, is the above-mentioned determination methods of overtaking other vehicles or climbing proposed based on the actual operation situation of hybrid vehicle, avoids erroneous judgement.
(4) the engine warming up controlling method of hybrid vehicle of the present invention and system, before preheating is carried out to motor, can first judge whether preheating system for engine exists fault, if then can direct ato unit, if not, just can start to carry out preheating to motor.If there is fault in preheating system for engine, even if carry out the effect that engine warming up does not reach preheating yet, now timely ato unit, avoid waste of time, and trouble signal can be exported in time when preheating system for engine breaks down, be conducive to the running state that driver understands preheating system for engine in time.
(5) the engine warming up controlling method of hybrid vehicle of the present invention and system, table look-up acquisition first preheat time and the second preheat time according to engine water temperature, cell voltage and atmospheric pressure, and the smaller in getting both is as preheat time, and only have when the time of preheating is greater than preheat time, just can send preheating and complete information ato unit.Therefore engine warming up controlling method of the present invention and system, while guarantee hybrid vehicle can obtain abundant preheating, avoids temporal waste, improves the efficiency that mode of operation switches.
(6) the engine warming up controlling method of hybrid vehicle of the present invention and system, when the mode of operation be switched to is paralleling model, also can judge whether hybrid vehicle is in the situation of overtaking other vehicles or climbing constantly, if, then engine warming up can be stopped, ato unit, no matter whether engine warming up completes.Therefore engine warming up controlling method of the present invention and system, when hybrid vehicle need more large driving force, engine warming up can be stopped in time, ato unit increases driving force as early as possible, the mode of operation of hybrid vehicle and residing environment are considered, provide the most practical optimum engine warming up controlling method, even if when waiting for that motor completes preheating, also obtain certain preheating before ensureing engine start as far as possible, reduce the discharge of pollutant as much as possible.
(7) the engine warming up controlling method of hybrid vehicle of the present invention and system, a stand-by period can be set, if do not send preheating in the described stand-by period yet to complete information, then can direct ato unit, when preheating completes, avoid and do not complete owing to sending preheating the situation that information makes motor not start, decrease waste of time, improve the efficiency that mode of operation switches.
Accompanying drawing explanation
In order to make content of the present invention be more likely to be clearly understood, below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the flow chart of engine warming up controlling method described in embodiment 1;
Fig. 2 is the flow chart of engine warming up controlling method when switching to series model;
Fig. 3 is the flow chart of engine warming up controlling method when switching to paralleling model;
Fig. 4 is the structured flowchart of engine warming up control system when switching to series model;
Fig. 5 is the structured flowchart of engine warming up control system when switching to paralleling model;
Fig. 6 is HCU and ECU information interaction schematic diagram.
Embodiment
Embodiment 1
Present embodiments provide a kind of engine warming up controlling method of hybrid vehicle, as shown in Figure 1, comprise the steps:
Obtain the electricity of the on-vehicle battery of described hybrid vehicle.
When described electricity is lower than setting threshold value, judge whether to need to carry out engine warming up from the mode of operation that electric-only mode will be switched to according to described hybrid vehicle, if then carry out preheating to motor, if not, then ato unit, the mode of operation that wherein will be switched to comprises series model and paralleling model.
In a particular application, HCU (mixed power control unit) and/or ECU (control unit of engine) can be passed through and perform above-mentioned steps, as the most preferred mode of one, as shown in Figure 6, HCU (mixed power control unit) can be passed through and perform relevant judgment part, need to carry out engine warming up as judged whether according to hybrid vehicle mode of operation, judge whether to need the steps such as ato unit, ECU (control unit of engine) can be passed through and perform associated engine control section, as carried out engine warming up, the steps such as ato unit.
The engine warming up controlling method of the hybrid vehicle described in the present embodiment, when the electricity of the on-vehicle battery of hybrid vehicle is lower than setting threshold value, also namely hybrid vehicle switched by pattern demand time, can judge whether to need to carry out engine warming up from the mode of operation that electric-only mode will be switched to according to hybrid vehicle, if just preheating can be carried out to motor, ato unit if not.Therefore, engine warming up controlling method described in the present embodiment, engine warming up can be controlled according to the hybrid vehicle mode of operation of dynamic change, even and if start engine warming up, also can judge whether constantly to need to proceed engine warming up, if desired will continue to carry out preheating to motor, if will engine warming up be stopped when not needing, ato unit, effectively engine warming up can be controlled according to the actual motion state of hybrid vehicle, reduce the discharge of pollutant, improve the startability of motor.
Embodiment 2
On the basis of embodiment 1, the engine warming up controlling method of the hybrid vehicle described in the present embodiment, as shown in Figure 2, when the mode of operation that will be switched to is series model, judges to need to carry out engine warming up.
In a particular application, some hybrid vehicles only have electric-only mode and series model, and some hybrid vehicles only have electric-only mode and paralleling model, and the above-mentioned Three models of some hybrid vehicles all possesses.No matter which kind of situation, when battery electric quantity reduces to a certain degree, the state that HCU gets battery will make the judgement needing to be switched to series model or paralleling model by electric-only mode, now, for the situation only including series model, HCU will send series model handoff request to ECU, and the mode of operation that be switched to, namely for be switched to series model by electric-only mode, needs to carry out engine warming up; For the situation only including paralleling model, HCU will send paralleling model handoff request to ECU, and the mode of operation that be switched to, namely for be switched to paralleling model by electric-only mode, needs to carry out engine warming up.
As the optional mode of execution of one, as shown in Figure 3, when the mode of operation that will be switched to is paralleling model, first judge whether hybrid vehicle is in the situation of overtaking other vehicles or climbing, if then judge not need to carry out engine warming up, otherwise judge to need to carry out engine warming up.
The engine warming up controlling method of the hybrid vehicle described in the present embodiment, when the mode of operation be switched to is paralleling model, can first judge whether hybrid vehicle is in the situation of overtaking other vehicles or climbing, if, then judge not need to carry out engine warming up, direct ato unit.Because under paralleling model, motor also can be used for driving, and when hybrid vehicle is in the situation of overtaking other vehicles or climbing, needs to provide larger driving force, now needs ato unit as early as possible to eliminate the step of engine warming up to increase driving force.Therefore, the engine warming up controlling method described in the present embodiment, has considered the mode of operation of hybrid vehicle and residing environment, provides the most practical optimum engine warming up controlling method.
As the optional mode of execution of one, describedly judge whether hybrid vehicle is in the situation of overtaking other vehicles or climbing and comprises the steps:
Obtain accelerator pedal position variance ratio and vehicle present load moment of torsion.
By accelerator pedal position variance ratio compared with the calibration value preset, by vehicle present load moment of torsion compared with motor max. output torque, when accelerator pedal position variance ratio is greater than described calibration value, judge to be in the situation of overtaking other vehicles, when vehicle present load moment of torsion is greater than described motor max. output torque, judge the situation being in climbing.
In embody rule, when accelerator pedal position variance ratio is greater than calibration value, just can be considered as driver to overtake other vehicles intention, equally, when vehicle present load moment of torsion is greater than max. output torque (motor driving force), then think that vehicle travel resistance is larger, motor is needed to provide power-assisted (such as climbing) as early as possible, above-mentioned two situations occur arbitrary a kind of, and all can judge not need to carry out engine warming up, direct ato unit carries out pattern switching.
In embody rule, described calibration value by gathering the multi-group data of the throttle position pedal position rate under state of overtaking other vehicles, can get its mean value as calibration value; Described motor max. output torque is the maximum driving force of motor under this model.Described accelerator pedal position variance ratio can by obtaining the initial position of gas pedal and final position, calculates spacing between initial position and final position as accelerator pedal position variable quantity; Moving to run duration needed for final position by obtaining gas pedal from initial position, utilizing formula: accelerator pedal position variance ratio=accelerator pedal position variable quantity/run duration calculates and obtains accelerator pedal position variance ratio.Vehicle present load moment of torsion can be obtained by the signal output port of motor.
The engine warming up controlling method of the hybrid vehicle described in the present embodiment, by by accelerator pedal position variance ratio compared with calibration value, by vehicle present load moment of torsion compared with motor max. output torque, when accelerator pedal position variance ratio is greater than described calibration value, just can judge to be in the situation of overtaking other vehicles, when vehicle present load moment of torsion is greater than described motor max. output torque, just can judge the situation being in climbing, be the above-mentioned determination methods of overtaking other vehicles or climbing proposed based on the actual operation situation of hybrid vehicle, avoid erroneous judgement.
When the mode of operation that will be switched to be series model or paralleling model and the situation of both not overtaken other vehicles also do not climb situation time, as one preferred embodiment, as shown in Figure 2 and Figure 3, also comprise the steps: before preheating is carried out to motor
Judge whether preheating system for engine exists fault, if so, then direct ato unit export trouble signal; If not, then start to carry out preheating to motor.
In embody rule, when preheating system for engine breaks down, trouble signal will be exported, if ECU receives above-mentioned signal, will judge that preheating system for engine breaks down and feeds back to HCU, now HCU sends ato unit request to ECU, and ECU will control engine start; Otherwise, then can judge preheating system for engine fault-free, start to carry out engine warming up.
The engine warming up controlling method of the hybrid vehicle described in the present embodiment, before preheating is carried out to motor, can first judge whether preheating system for engine exists fault, if then can direct ato unit, if not, just can start to carry out preheating to motor.If there is fault in preheating system for engine, even if carry out the effect that engine warming up does not reach preheating yet, now timely ato unit, avoid waste of time, and trouble signal can be exported in time when preheating system for engine breaks down, be conducive to the running state that driver understands preheating system for engine in time.
As the optional mode of execution of one, preheating is carried out to motor and comprises the steps:
Obtain preheat time.
Preheating is carried out to motor, records the time of preheating and judge whether to need ato unit.
As the optional mode of execution of one, as shown in Figure 2, judge whether to need ato unit to comprise:
When the mode of operation that will be switched to is series model, the time of described preheating was compared with described preheat time, when the time of described preheating is more than or equal to described preheat time, send preheating and complete ato unit after information, hybrid vehicle mode of operation switches to series model by electric-only mode, otherwise continues to carry out preheating to motor.
As the optional mode of execution of another kind, as shown in Figure 3, judge whether to need ato unit to comprise: when the mode of operation that will be switched to is paralleling model, judge whether hybrid vehicle is in the situation of overtaking other vehicles or climbing, if, then stop engine warming up, ato unit, hybrid vehicle mode of operation switches to paralleling model by electric-only mode; If not, then the time of described preheating was compared with described preheat time, when the time of described preheating is more than or equal to described preheat time, send preheating and complete ato unit after information, hybrid vehicle mode of operation switches to paralleling model by electric-only mode, otherwise continues to carry out preheating to motor.
For the hybrid vehicle only including series model, then without the need to judging whether to be in the situation of overtaking other vehicles or climbing, only having when reaching the preheat time of regulation, just can send preheating and completing information ato unit.For only including paralleling model or both having comprised the hybrid vehicle that series model also comprises paralleling model, when the mode of operation that will be switched to is paralleling model, need first to judge whether hybrid vehicle is in the situation of overtaking other vehicles or climbing, if, then without the need to etc. reach preheat time of regulation, engine warming up will be stopped, ato unit at once.
The engine warming up controlling method of the hybrid vehicle described in the present embodiment, when the mode of operation that will be switched to is for being switched to paralleling model by electric-only mode, also can judge whether hybrid vehicle is in the situation of overtaking other vehicles or climbing constantly, if, then engine warming up can be stopped, ato unit, no matter whether engine warming up completes.Therefore the engine warming up controlling method described in the present embodiment, when hybrid vehicle need more large driving force, engine warming up can be stopped in time, ato unit increases driving force as early as possible, the mode of operation of hybrid vehicle and residing environment are considered, provide the most practical optimum engine warming up controlling method, even if when waiting for that motor completes preheating, also obtain certain preheating before ensureing engine start as far as possible, reduce the discharge of pollutant as much as possible.
As the optional mode of execution of one, described acquisition comprises the steps: preheat time
Obtain engine water temperature, cell voltage and atmospheric pressure.
Table look-up acquisition first preheat time according to described cell voltage, table look-up acquisition second preheat time according to the gentle atmospheric pressure of described engine water.
By described first preheat time compared with described second preheat time, the smaller in both getting is as preheat time.
In embody rule, the corresponding relation of described cell voltage and preheat time, the gentle atmospheric pressure of described engine water and the corresponding relation of preheat time all obtain by test of many times, then can set up the table comprising above-mentioned corresponding relation.Be aware of the cell voltage sometime, the gentle atmospheric pressure of engine water namely by tabling look-up the preheat time obtaining its correspondence.
The engine warming up controlling method of the hybrid vehicle described in the present embodiment, table look-up acquisition first preheat time and the second preheat time according to engine water temperature, cell voltage and atmospheric pressure, and the smaller in getting both is as preheat time, and only have when the time of preheating is more than or equal to preheat time, just can send preheating and complete information ato unit.Therefore the engine warming up controlling method described in the present embodiment, while guarantee hybrid vehicle can obtain abundant preheating, avoids temporal waste, improves the efficiency that mode of operation switches.
As one preferred embodiment, the engine warming up controlling method of the hybrid vehicle described in the present embodiment, is characterized in that, also comprise the steps:
Setting stand-by period=preheat time+redundancy value, if do not send preheating in the described stand-by period yet to complete information, then direct ato unit.
In embody rule, described redundancy value can get 0.5s.
The engine warming up controlling method of the hybrid vehicle described in the present embodiment, a stand-by period can be set, if ECU does not send preheating yet and completes information in the described stand-by period, namely HCU does not receive preheating and completes information within the stand-by period yet, also can send ato unit request to ECU and carry out direct ato unit, when preheating completes, avoid and complete information or HCU and do not receive preheating because communication failure causes ECU not send preheating and complete the situation that information makes motor not start, decrease waste of time, improve the efficiency that mode of operation switches.
Embodiment 3
Present embodiments provide a kind of engine warming up control system of hybrid vehicle, as shown in Figure 4, Figure 5, comprising:
Acquisition module, for obtaining the electricity of the on-vehicle battery of described hybrid vehicle.
Judge module, for when described electricity is lower than setting threshold value, judge whether to need to carry out engine warming up from the mode of operation that electric-only mode will be switched to according to described hybrid vehicle, if then carry out preheating to motor, if not, then ato unit, the mode of operation that wherein will be switched to comprises series model and paralleling model.
The engine warming up control system of the hybrid vehicle described in the present embodiment, when the electricity of the on-vehicle battery of hybrid vehicle is lower than setting threshold value, also namely hybrid vehicle switched by pattern demand time, can judge whether to need to carry out engine warming up from the mode of operation that electric-only mode will be switched to according to hybrid vehicle, if just preheating can be carried out to motor, ato unit if not.Therefore, engine warming up control system described in the present embodiment, engine warming up can be controlled according to the hybrid vehicle mode of operation of dynamic change, even and if start engine warming up, also can judge whether constantly to need to proceed engine warming up, if desired will continue to carry out preheating to motor, if will engine warming up be stopped when not needing, ato unit, effectively engine warming up can be controlled according to the actual motion state of hybrid vehicle, reduce the discharge of pollutant, improve the startability of motor.
As the optional mode of execution of one, described judge module comprises preheating judging unit, needs to carry out engine warming up for judging whether, and when the mode of operation that will be switched to is series model, judges to need to carry out engine warming up.
As the optional mode of execution of another kind, described judge module comprises preheating judging unit, need to carry out engine warming up for judging whether, and when the mode of operation that will be switched to is paralleling model, first judge whether hybrid vehicle is in the situation of overtaking other vehicles or climbing, if then judge not need to carry out engine warming up, otherwise judge to need to carry out engine warming up.
The engine warming up control system of the hybrid vehicle described in the present embodiment, when the mode of operation that will be switched to is paralleling model, can first judge whether hybrid vehicle is in the situation of overtaking other vehicles or climbing, if, then judge not need to carry out engine warming up, direct ato unit.Because under paralleling model, motor also can be used for driving, and when hybrid vehicle is in the situation of overtaking other vehicles or climbing, needs to provide larger driving force, now needs ato unit as early as possible to eliminate the step of engine warming up to increase driving force.Therefore, the engine warming up control system described in the present embodiment, has considered the mode of operation of hybrid vehicle and residing environment, provides the most practical optimum engine warming up controlling method.
As the optional mode of execution of one, as shown in Figure 5, described preheating judging unit comprises the first determining device, for judging whether hybrid vehicle is in the situation of overtaking other vehicles or climbing, and it comprises:
Acquisition device, for obtaining accelerator pedal position variance ratio and vehicle present load moment of torsion.
First judgment means, for by accelerator pedal position variance ratio compared with the calibration value preset, by vehicle present load moment of torsion compared with motor max. output torque, when accelerator pedal position variance ratio is greater than described calibration value, judge to be in the situation of overtaking other vehicles, when vehicle present load moment of torsion is greater than described motor max. output torque, judge the situation being in climbing.
The engine warming up control system of the hybrid vehicle described in the present embodiment, by by accelerator pedal position variance ratio compared with calibration value, by vehicle present load moment of torsion compared with motor max. output torque, when accelerator pedal position variance ratio is greater than described calibration value, just can judge to be in the situation of overtaking other vehicles, when vehicle present load moment of torsion is greater than described motor max. output torque, just can judge the situation being in climbing, be the above-mentioned determination methods of overtaking other vehicles or climbing proposed based on the actual operation situation of hybrid vehicle, avoid erroneous judgement.
As the optional mode of execution of one, described judge module also comprises breakdown judge unit, for judging whether preheating system for engine exists fault, and if so, then direct ato unit export trouble signal; If not, then start to carry out preheating to motor.
The engine warming up control system of the hybrid vehicle described in the present embodiment, before preheating is carried out to motor, can first judge whether preheating system for engine exists fault, if then can direct ato unit, if not, just can start to carry out preheating to motor.If there is fault in preheating system for engine, even if carry out the effect that engine warming up does not reach preheating yet, now timely ato unit, avoid waste of time, and trouble signal can be exported in time when preheating system for engine breaks down, be conducive to the running state that driver understands preheating system for engine in time.
As the optional mode of execution of one, described judge module comprises preheating unit, and it comprises;
Time getter, for obtaining preheat time.
Preheater, carrying out preheating for starting to motor, recording the time of preheating and judging whether to need ato unit.
As the optional mode of execution of one, as shown in Figure 4, described preheater comprises the second judgment means, ato unit is needed for judging whether, when the mode of operation that will be switched to is series model, the time of described preheating was compared with described preheat time, when the time of described preheating is more than or equal to described preheat time, send preheating and complete ato unit after information, hybrid vehicle mode of operation switches to series model by electric-only mode, otherwise continues to carry out preheating to motor.
As the optional mode of execution of another kind, as shown in Figure 5, described preheater comprises the second judgment means, ato unit is needed for judging whether, when the mode of operation that will be switched to is paralleling model, first judge whether hybrid vehicle is in the situation of overtaking other vehicles or climbing, if, then stop engine warming up, ato unit; If not, then the time of described preheating was compared with described preheat time, when the time of described preheating is more than or equal to described preheat time, send preheating and complete ato unit after information, hybrid vehicle mode of operation switches to paralleling model by electric-only mode, otherwise continues to carry out preheating to motor.
The engine warming up control system of the hybrid vehicle described in the present embodiment, when the mode of operation that will be switched to is for being switched to paralleling model by electric-only mode, also can judge whether hybrid vehicle is in the situation of overtaking other vehicles or climbing constantly, if, then engine warming up can be stopped, ato unit, no matter whether engine warming up completes.Therefore the engine warming up controlling method described in the present embodiment, when hybrid vehicle need more large driving force, engine warming up can be stopped in time, ato unit increases driving force as early as possible, the mode of operation of hybrid vehicle and residing environment are considered, provide the most practical optimum engine warming up controlling method, even if when waiting for that motor completes preheating, also obtain certain preheating before ensureing engine start as far as possible, reduce the discharge of pollutant as much as possible.
As the optional mode of execution of one, described time getter comprises:
Second acquisition device, for obtaining engine water temperature, cell voltage and atmospheric pressure.
Table look-up device, for tabling look-up acquisition first preheat time according to described cell voltage, tables look-up acquisition second preheat time according to the gentle atmospheric pressure of described engine water.
Value device, for by described first preheat time compared with described second preheat time, get smaller in both as preheat time.
The engine warming up control system of the hybrid vehicle described in the present embodiment, table look-up acquisition first preheat time and the second preheat time according to engine water temperature, cell voltage and atmospheric pressure, and the smaller in getting both is as preheat time, and only have when the time of preheating is more than or equal to preheat time, just can send preheating and complete information ato unit.Therefore the engine warming up control system described in the present embodiment, while guarantee hybrid vehicle can obtain abundant preheating, avoids temporal waste, improves the efficiency that mode of operation switches.
As one preferred embodiment, the engine warming up control system described in the present embodiment, also comprises:
Timeout treatment module, for set stand-by period=preheat time+redundancy value, if do not send preheating in the described stand-by period yet to complete information, then direct ato unit.
The engine warming up control system of the hybrid vehicle described in the present embodiment, a stand-by period can be set, and by the time of preheating compared with the described stand-by period, if the time of preheating does not send preheating yet and completes information after exceeding the stand-by period, then can direct ato unit, when preheating completes, avoid and do not complete owing to sending preheating the situation that information makes motor not start, decrease waste of time, improve the efficiency that mode of operation switches.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disk memory, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or skeleton diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or skeleton diagram and/or square frame and flow chart and/or skeleton diagram and/or square frame.These computer program instructions can being provided to the processor of general computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or skeleton diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or skeleton diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or skeleton diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.

Claims (20)

1. an engine warming up controlling method for hybrid vehicle, is characterized in that, comprise the steps:
Obtain the electricity of the on-vehicle battery of described hybrid vehicle;
When described electricity is lower than setting threshold value, judge whether to need to carry out engine warming up from the mode of operation that electric-only mode will be switched to according to described hybrid vehicle, if then carry out preheating to motor, if not, then ato unit, the mode of operation that wherein will be switched to comprises series model and paralleling model.
2. the engine warming up controlling method of hybrid vehicle according to claim 1, is characterized in that, when the mode of operation that will be switched to is series model, judges to need to carry out engine warming up.
3. the engine warming up controlling method of hybrid vehicle according to claim 1, it is characterized in that, when the mode of operation that will be switched to is paralleling model, first judge whether hybrid vehicle is in the situation of overtaking other vehicles or climbing, if then judge not need to carry out engine warming up, otherwise judge to need to carry out engine warming up.
4. the engine warming up controlling method of hybrid vehicle according to claim 3, is characterized in that, describedly judges whether hybrid vehicle is in the situation of overtaking other vehicles or climbing and comprises the steps:
Obtain accelerator pedal position variance ratio and vehicle present load moment of torsion;
By accelerator pedal position variance ratio compared with the calibration value preset, by vehicle present load moment of torsion compared with motor max. output torque, when accelerator pedal position variance ratio is greater than described calibration value, judge to be in the situation of overtaking other vehicles, when vehicle present load moment of torsion is greater than described motor max. output torque, judge the situation being in climbing.
5., according to the engine warming up controlling method of the arbitrary described hybrid vehicle of claim 1-4, it is characterized in that, also comprise the steps: before preheating is carried out to motor
Judge whether preheating system for engine exists fault, if so, then direct ato unit export trouble signal; If not, then start to carry out preheating to motor.
6., according to the engine warming up controlling method of the arbitrary described hybrid vehicle of claim 1-5, it is characterized in that, preheating is carried out to motor and comprises the steps:
Obtain preheat time;
Preheating is carried out to motor, records the time of preheating and judge whether to need ato unit.
7. the engine warming up controlling method of hybrid vehicle according to claim 6, is characterized in that, described in judge whether to need ato unit to comprise:
When the mode of operation that will be switched to is series model, the time of described preheating was compared with described preheat time, when the time of described preheating is more than or equal to described preheat time, send preheating and complete ato unit after information, hybrid vehicle mode of operation switches to series model by electric-only mode, otherwise continues to carry out preheating to motor.
8. the engine warming up controlling method of hybrid vehicle according to claim 6, is characterized in that, described in judge whether to need ato unit to comprise:
When the mode of operation that will be switched to is paralleling model, judge whether hybrid vehicle is in the situation of overtaking other vehicles or climbing, and if so, then stops engine warming up, ato unit, hybrid vehicle mode of operation switches to paralleling model by electric-only mode; If not, then the time of described preheating was compared with described preheat time, when the time of described preheating is more than or equal to described preheat time, send preheating and complete ato unit after information, hybrid vehicle mode of operation switches to paralleling model by electric-only mode, otherwise continues to carry out preheating to motor.
9., according to the engine warming up controlling method of the arbitrary described hybrid vehicle of claim 6-8, it is characterized in that, described acquisition comprises the steps: preheat time
Obtain engine water temperature, cell voltage and atmospheric pressure;
Table look-up acquisition first preheat time according to described cell voltage, table look-up acquisition second preheat time according to the gentle atmospheric pressure of described engine water;
By described first preheat time compared with described second preheat time, the smaller in both getting is as preheat time.
10., according to the engine warming up controlling method of the arbitrary described hybrid vehicle of claim 6-9, it is characterized in that, also comprise the steps:
Setting stand-by period=preheat time+redundancy value, if do not send preheating in the described stand-by period yet to complete information, then direct ato unit.
11. 1 kinds of engine warming up control system, is characterized in that, comprising:
Acquisition module, for obtaining the electricity of the on-vehicle battery of described hybrid vehicle;
Judge module, for when described electricity is lower than setting threshold value, judge whether to need to carry out engine warming up from the mode of operation that electric-only mode will be switched to according to described hybrid vehicle, if then carry out preheating to motor, if not, then ato unit, the mode of operation that wherein will be switched to comprises series model and paralleling model.
The engine warming up control system of 12. hybrid vehicles according to claim 11, it is characterized in that, described judge module comprises preheating judging unit, need to carry out engine warming up for judging whether, and when the mode of operation that will be switched to is series model, judge to need to carry out engine warming up.
The engine warming up control system of 13. hybrid vehicles according to claim 11, it is characterized in that, described judge module comprises preheating judging unit, need to carry out engine warming up for judging whether, and when the mode of operation that will be switched to is paralleling model, first judge whether hybrid vehicle is in the situation of overtaking other vehicles or climbing, if then judge not need to carry out engine warming up, otherwise judge to need to carry out engine warming up.
The engine warming up control system of 14. hybrid vehicles according to claim 13, is characterized in that, described preheating judging unit comprises the first determining device, for judging whether hybrid vehicle is in the situation of overtaking other vehicles or climbing, and it comprises:
Acquisition device, for obtaining accelerator pedal position variance ratio and vehicle present load moment of torsion;
First judgment means, for by accelerator pedal position variance ratio compared with the calibration value preset, by vehicle present load moment of torsion compared with motor max. output torque, when accelerator pedal position variance ratio is greater than described calibration value, judge to be in the situation of overtaking other vehicles, when vehicle present load moment of torsion is greater than described motor max. output torque, judge the situation being in climbing.
15. according to the engine warming up control system of the arbitrary described hybrid vehicle of claim 11-14, it is characterized in that, described judge module also comprises breakdown judge unit, for judging whether preheating system for engine exists fault, if so, then direct ato unit export trouble signal; If not, then start to carry out preheating to motor.
16. according to the engine warming up control system of the arbitrary described hybrid vehicle of claim 11-15, and it is characterized in that, described judge module comprises preheating unit, and it comprises;
Time getter, for obtaining preheat time;
Preheater, carrying out preheating for starting to motor, recording the time of preheating and judging whether to need ato unit.
The engine warming up control system of 17. hybrid vehicles according to claim 16, it is characterized in that, described preheater comprises the second judgment means, ato unit is needed for judging whether, when the mode of operation that will be switched to is series model, the time of described preheating was compared with described preheat time, when the time of described preheating is more than or equal to described preheat time, send preheating and complete ato unit after information, hybrid vehicle mode of operation switches to series model by electric-only mode, otherwise continue to carry out preheating to motor.
The engine warming up control system of 18. hybrid vehicles according to claim 16, it is characterized in that, described preheater comprises the second judgment means, ato unit is needed for judging whether, when the mode of operation that will be switched to is paralleling model, first judge whether hybrid vehicle is in the situation of overtaking other vehicles or climbing, if, then stop engine warming up, ato unit; If not, then the time of described preheating was compared with described preheat time, when the time of described preheating is more than or equal to described preheat time, send preheating and complete ato unit after information, hybrid vehicle mode of operation switches to paralleling model by electric-only mode, otherwise continues to carry out preheating to motor.
19. according to the engine warming up control system of the arbitrary described hybrid vehicle of claim 16-18, and it is characterized in that, described time getter comprises:
Second acquisition device, for obtaining engine water temperature, cell voltage and atmospheric pressure;
Table look-up device, for tabling look-up acquisition first preheat time according to described cell voltage, tables look-up acquisition second preheat time according to the gentle atmospheric pressure of described engine water;
Value device, for by described first preheat time compared with described second preheat time, get smaller in both as preheat time.
20., according to the engine warming up control system of the arbitrary described hybrid vehicle of claim 16-19, is characterized in that, also comprise:
Timeout treatment module, for set stand-by period=preheat time+redundancy value, if do not send preheating in the described stand-by period yet to complete information, then direct ato unit.
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