CN103419616A - All-wheel-drive hybrid electric vehicle and control method thereof - Google Patents
All-wheel-drive hybrid electric vehicle and control method thereof Download PDFInfo
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- CN103419616A CN103419616A CN2012101531051A CN201210153105A CN103419616A CN 103419616 A CN103419616 A CN 103419616A CN 2012101531051 A CN2012101531051 A CN 2012101531051A CN 201210153105 A CN201210153105 A CN 201210153105A CN 103419616 A CN103419616 A CN 103419616A
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract
The invention provides an all-wheel-drive hybrid electric vehicle and a control method thereof. The all-wheel-drive hybrid electric vehicle comprises front wheels, rear wheels, a hub motor, an engine, an ISG (integrated starter generator) motor, a clutch, an inverter and a power battery, the hub motor is connected with the front wheels and used for driving the same, the engine is connected with the rear wheels through a speed changer and used for driving the rear wheels, the ISG motor is connected between the engine and the speed changer and used for driving the rear wheels, the clutch is connected between the engine and the ISG motor, the inverter is connected with the hub motor and the ISG motor respectively, and the power battery is connected with the inverter and used for powering the hub motor and the ISG motor. According to the all-wheel-drive hybrid electric vehicle, performance in climbing, starting, accelerating and the like of the vehicle is improved, pure electric drive of four wheels is realized, a front driving device is simplified, oil consumption and emission are lowered, and fuel economy of the vehicle is improved.
Description
Technical field
The present invention relates to field of automobile, particularly a kind of four-drive hybrid electric vehicle and control method thereof.
Background technology
Along with the worsening shortages of the non-renewable resources such as oil and the people pay attention to day by day to environmental protection, car manufactures starts to develop hybrid vehicle.The structural representation of the four-drive hybrid electric vehicle that Fig. 1 is prior art, as shown in Figure 1, this four-wheel hybrid vehicle adopts engine behind front wheel forerunner and separate electrical motor to drive the type of drive of trailing wheel, particularly, driving engine 1 ', propons ISG (Integrated Starter and Generator, start power generation all-in-one machine) motor 2 ' and front reduction gear 3 ' formation front drive device, it is upper that wherein driving engine 1 ' is arranged on front driving axle 4 ', and propons ISG motor 2 ' is connected by driving device with driving engine 1 '; Driving device after back axle ISG motor 7 ' and rear retarder 8 ' form, the rear retarder 8 ' that wherein back axle ISG motor 7 ' connects by driving device.Propons ISG motor 2 ' is electrically connected to by inverter 5 ' electrokinetic cell 10 ', and back axle ISG motor 7 ' is electrically connected to electrokinetic cell 10 ' by inverter 6 ' respectively.
There is following problem in prior art: (1) adopts engine behind front wheel forerunner mode to make the propulsive effort of front-wheel be greater than the propulsive effort of trailing wheel, and under particular case, the performances such as the climbing of automobile, startup and acceleration can not meet the demands, and vehicle dynamic quality is low; (2) can't realize the pure motorized motions mode of four-wheel, oil consumption and discharge are higher; (3) complex structure of front drive device.
Summary of the invention
Purpose of the present invention is intended at least solve one of above-mentioned technological deficiency.
For this reason, first purpose of the present invention is to propose a kind of four-drive hybrid electric vehicle, and the performances such as the climbing of this four-drive hybrid electric vehicle, startup and acceleration are improved, and can realize the pure motorized motions of four-wheel, simplify front drive device simultaneously, reduced oil consumption and discharge.
Second purpose of the present invention is to propose a kind of control method of four-drive hybrid electric vehicle.
For achieving the above object, the four-drive hybrid electric vehicle of first aspect present invention embodiment comprises: front-wheel and trailing wheel; Wheel hub motor, described wheel hub motor is connected with described front-wheel, for driving described front-wheel; Driving engine, described driving engine is connected with described trailing wheel by change-speed box, for driving described trailing wheel; Start the ISG motor of power generation all-in-one machine, described ISG motor is connected between described driving engine and described change-speed box, for driving described trailing wheel; Power-transfer clutch, described power-transfer clutch is connected between described driving engine and described ISG motor; Inverter, described inverter is connected with described ISG motor with described wheel hub motor respectively; And electrokinetic cell, described electrokinetic cell is connected with inverter, is used to described wheel hub motor and described ISG motor that power is provided.
Four-drive hybrid electric vehicle according to the embodiment of the present invention, at least there is following beneficial effect: (1) In-wheel motor driving front-wheel, driving engine and/or ISG motor drive trailing wheel, when adopting the engine drive trailing wheel, the propulsive effort of trailing wheel is greater than the propulsive effort of front-wheel, improve the performances such as climbing, startup and acceleration of automobile, improved the dynamic property of automobile; (2) adopt the In-wheel motor driving front-wheel and adopt the ISG motor to drive trailing wheel, can realize the pure motorized motions of four-wheel; (3) front-wheel adopts In-wheel motor driving, has simplified front-wheel drive, reduces costs; (4) between driving engine and ISG motor, adopt power-transfer clutch to connect, can realize the independent driving trailing wheel of driving engine or ISG motor by power-transfer clutch, can adopt the ISG motor to drive trailing wheel in pure electronic mode separately, also can adopt driving engine to drive trailing wheel in pure driving engine mode separately, can select corresponding type of drive according to the actual travel situation easily, thereby reduced oil consumption and discharge, improved the fuel economy of automobile.
In one embodiment of the invention, also comprise: clutch controller, for described power-transfer clutch is controlled; The hub motor control device, for being controlled described wheel hub motor; Engine controller, for being controlled described driving engine; The ISG electric machine controller, for being controlled described ISG motor; And entire car controller, for the mode of operation according to described four-drive hybrid electric vehicle, described clutch controller, hub motor control device, engine controller and ISG electric machine controller are controlled.
In one embodiment of the invention, described entire car controller is connected with described clutch controller, hub motor control device, engine controller and ISG electric machine controller by the CAN bus.
In one embodiment of the invention, also comprise: retarder and diff, described change-speed box is connected with described trailing wheel with diff by described retarder.
In one embodiment of the invention, also comprise: battery manager, described battery manager is connected with described entire car controller with described electrokinetic cell, under the control of described entire car controller, described electrokinetic cell being carried out to the charging and discharging management.
In one embodiment of the invention, also comprise: abs controller, described abs controller is connected with described entire car controller by described CAN bus.
In one embodiment of the invention, when described four-drive hybrid electric vehicle during in pure motorized motions pattern, described entire car controller is controlled described power-transfer clutch by described clutch controller and is disconnected, and by described hub motor control device and/or the described wheel hub motor of ISG motor controller controls and/or ISG motor, described four-drive hybrid electric vehicle is driven.
In one embodiment of the invention, when the electric weight of described electrokinetic cell is greater than default charge value, at the described four-drive hybrid electric vehicle of described four-drive hybrid electric vehicle startup control system, enter described pure motorized motions pattern.
In one embodiment of the invention, after the speed of a motor vehicle of described four-drive hybrid electric vehicle is greater than the first pre-set velocity value, described four-drive hybrid electric vehicle enters pure engine mode, it is closed so that described driving engine access that described entire car controller is controlled described power-transfer clutch by described clutch controller, and by the described engine starting of described engine controller controls, and by described hub motor control device and the described wheel hub motor of described ISG motor controller controls and the idle running of described ISG motor.
In one embodiment of the invention, after the speed of a motor vehicle of described four-drive hybrid electric vehicle is greater than the second pre-set velocity value, described four-drive hybrid electric vehicle enters moderate and mixes the 4 wheel driven pattern, described entire car controller is controlled described wheel hub motor by described hub motor control device described front-wheel is driven, wherein, described the second pre-set velocity value is greater than described the first pre-set velocity value.
In one embodiment of the invention, after the speed of a motor vehicle of described four-drive hybrid electric vehicle is greater than the second pre-set velocity value, described four-drive hybrid electric vehicle enters moderate and mixes the 4 wheel driven pattern, described entire car controller is controlled described wheel hub motor by described hub motor control device described front-wheel is driven, wherein, described the second pre-set velocity value is greater than described the first pre-set velocity value.
In one embodiment of the invention, after the speed of a motor vehicle of described four-drive hybrid electric vehicle is greater than the 3rd pre-set velocity value, described four-drive hybrid electric vehicle enters the strong dark 4 wheel driven pattern of closing, described entire car controller is driven described trailing wheel by the described ISG motor of described ISG motor controller controls, wherein, described the 3rd pre-set velocity value is greater than described the second pre-set velocity value.
In one embodiment of the invention, when described four-drive hybrid electric vehicle slows down or brakes, described four-drive hybrid electric vehicle enters the regenerative brake pattern, described entire car controller enters power generation mode by described hub motor control device and/or the described wheel hub motor of described ISG motor controller controls and/or described ISG motor, so that described electrokinetic cell is charged.
For achieving the above object, the control method of the four-drive hybrid electric vehicle of second aspect present invention embodiment, described four-drive hybrid electric vehicle is the described four-drive hybrid electric vehicle of any one in first aspect present invention embodiment, said method comprising the steps of: S1: the current vehicle speed that detects described four-drive hybrid electric vehicle; S2: according to described current vehicle speed, select corresponding mode of operation; And S3: according to described mode of operation, control the described four-drive hybrid electric vehicle of one or more drivings in described wheel hub motor, described driving engine and described ISG motor.
Control method according to the four-drive hybrid electric vehicle of the embodiment of the present invention, can select flexibly mode of operation according to the speed of a motor vehicle of four-drive hybrid electric vehicle, can select corresponding mode according to different mode of operations, realize distributing rationally between driving engine, wheel hub motor and ISG motor, can guarantee when driving power is large to have higher fuel economy.
In one embodiment of the invention, if the current vehicle speed of described four-drive hybrid electric vehicle is less than the first pre-set velocity value, described four-drive hybrid electric vehicle enters pure motorized motions pattern, control described power-transfer clutch and disconnect, and control described wheel hub motor and/or the ISG motor is driven described four-drive hybrid electric vehicle.
In one embodiment of the invention, also comprise: the electric weight that detects described electrokinetic cell; If, and the electric weight of described electrokinetic cell is greater than default charge value, at the described four-drive hybrid electric vehicle of described four-drive hybrid electric vehicle startup control system, enter described pure motorized motions pattern.
In one embodiment of the invention, after if the speed of a motor vehicle of described four-drive hybrid electric vehicle is greater than described the first pre-set velocity value, described four-drive hybrid electric vehicle enters pure engine mode, control described power-transfer clutch closed so that described driving engine access, and control described engine starting, and control described wheel hub motor and the idle running of described ISG motor.
In one embodiment of the invention, after if the speed of a motor vehicle of described four-drive hybrid electric vehicle is greater than the second pre-set velocity value, described four-drive hybrid electric vehicle enters moderate mixing 4 wheel driven pattern, controlling described wheel hub motor is driven described front-wheel, wherein, described the second pre-set velocity value is greater than described the first pre-set velocity value.
In one embodiment of the invention, after if the speed of a motor vehicle of described four-drive hybrid electric vehicle is greater than the 3rd pre-set velocity value, described four-drive hybrid electric vehicle enters the strong dark 4 wheel driven pattern of closing, controlling described ISG motor is driven described trailing wheel, wherein, described the 3rd pre-set velocity value is greater than described the second pre-set velocity value.
In one embodiment of the invention, also comprise: detect described four-drive hybrid electric vehicle and whether enter deceleration or braking mode; If described four-drive hybrid electric vehicle enters, slow down or braking mode, described four-drive hybrid electric vehicle enters the regenerative brake pattern, controls described wheel hub motor and/or described ISG motor enters power generation mode, so that described electrokinetic cell is charged.
The aspect that the present invention is additional and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
The accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage will become from the following description of the accompanying drawings of embodiments and obviously and easily understand, wherein:
The structural representation of the four-drive hybrid electric vehicle that Fig. 1 is prior art;
The structural representation of the four-drive hybrid electric vehicle that Fig. 2 is one embodiment of the invention;
The structural representation of the four-drive hybrid electric vehicle that Fig. 3 is another embodiment of the present invention; And
The diagram of circuit of the control method of the four-drive hybrid electric vehicle that Fig. 4 is one embodiment of the invention.
The specific embodiment
Below describe embodiments of the invention in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label means same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
Disclosing hereinafter provides many different embodiment or example to be used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter parts and the setting of specific examples are described.Certainly, they are only example, and purpose does not lie in restriction the present invention.In addition, the present invention can be in different examples repeat reference numerals and/or letter.This repetition is in order to simplify and purpose clearly, itself do not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique the invention provides and the example of material, but those of ordinary skills can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, First Characteristic described below Second Characteristic it " on " structure can comprise that the first and second Characteristics creations are for the direct embodiment of contact, also can comprise the embodiment of other Characteristics creation between the first and second features, such the first and second features may not be direct contacts.
In description of the invention, it will be appreciated that, term " vertically ", " laterally ", " on ", orientation or the position relationship of the indications such as D score, 'fornt', 'back', " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward " be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, rather than indicate or imply that the device of indication or element must have specific orientation, construct and operation with specific orientation, therefore can not be interpreted as limitation of the present invention.
In description of the invention, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be done broad understanding, for example, can be mechanical connection or electrical connection, can be also the connection of two element internals, can be directly to be connected, and also can indirectly be connected by intermediary, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
The structural representation of the four-drive hybrid electric vehicle that Fig. 2 is one embodiment of the invention.As shown in Figure 2, according to the four-drive hybrid electric vehicle of the embodiment of the present invention, comprise: front-wheel 1, trailing wheel 2, wheel hub motor 3, driving engine 4, change-speed box 5, ISG motor 6, power-transfer clutch 7, inverter 8 and electrokinetic cell 9.
Particularly, wheel hub motor 3 can comprise two, passes through mechanical connection with front-wheel 1 respectively, for driving front-wheel 1.Wherein can realize by controlling wheel hub motor 3 the independent driving of front-wheel 1.
In one embodiment of the invention, four-drive hybrid electric vehicle also comprises retarder and diff (not shown), and change-speed box 5 is connected with trailing wheel 2 with diff by retarder.The power of driving engine 4 or 6 outputs of ISG motor can be passed to trailing wheel 2 by change-speed box 5, retarder, diff thus.
Power-transfer clutch 7 is connected between driving engine 4 and ISG motor 6; wherein between ISG motor 6 and power-transfer clutch 7, pass through mechanical connection; can realize separating of ISG motor 6 and driving engine 4 by control clutch 7, thus realize power break away from can so that driving engine 4 and ISG motor 6 can realize separately idle running or shut down.
Inverter 8 is connected with ISG motor 6 with wheel hub motor 3 respectively, and wherein inverter 8 can be two.Electrokinetic cell 9 is connected with inverter 8, is used to wheel hub motor 3 and ISG motor 6 that power is provided, and wherein electrokinetic cell 9 can be connected with inverter 8 by high-voltage wiring harness.
Four-drive hybrid electric vehicle according to the embodiment of the present invention, at least there is following beneficial effect: (1) In-wheel motor driving front-wheel, driving engine and/or ISG motor drive trailing wheel, when adopting the engine drive trailing wheel, the propulsive effort of trailing wheel is greater than the propulsive effort of front-wheel, improve the performances such as climbing, startup and acceleration of automobile, improved the dynamic property of automobile; (2) adopt the In-wheel motor driving front-wheel and adopt the ISG motor to drive trailing wheel, can realize the pure motorized motions of four-wheel; (3) front-wheel adopts In-wheel motor driving, has simplified front-wheel drive, reduces costs; (4) between driving engine and ISG motor, adopt power-transfer clutch to connect, can realize the independent driving trailing wheel of driving engine or ISG motor by power-transfer clutch, can adopt the ISG motor to drive trailing wheel in pure electronic mode separately, also can adopt driving engine to drive trailing wheel in pure driving engine mode separately, can select corresponding type of drive according to the actual travel situation easily, thereby reduced oil consumption and discharge, improved the fuel economy of automobile.
The structural representation of the four-drive hybrid electric vehicle that Fig. 3 is another embodiment of the present invention.As shown in Figure 3, according to the four-drive hybrid electric vehicle of the embodiment of the present invention, comprise: front-wheel 1, trailing wheel 2, wheel hub motor 3, driving engine 4, change-speed box 5, ISG motor 6, power-transfer clutch 7, inverter 8, electrokinetic cell 9, clutch controller 10, hub motor control device 11, engine controller 12, ISG electric machine controller 13 and entire car controller 14.
Particularly, wheel hub motor 3 can comprise two, passes through mechanical connection with front-wheel 1 respectively, for driving front-wheel 1.Driving engine 4 is connected with trailing wheel 2 by change-speed box 5, for driving trailing wheel.ISG motor 6 is connected between driving engine 4 and change-speed box 5, for driving trailing wheel 2.Power-transfer clutch 7 is connected between driving engine 4 and ISG motor 6.Inverter 8 is connected with ISG motor 6 with wheel hub motor 3 respectively.Electrokinetic cell 9 is connected with inverter 8, is used to wheel hub motor 3 and ISG motor 6 that power is provided.Wherein, four-drive hybrid electric vehicle also comprises retarder and diff (not shown), and change-speed box 5 is connected with trailing wheel 2 with diff by retarder.The power of driving engine 4 or 6 outputs of ISG motor can be passed to trailing wheel 2 by change-speed box 5, retarder, diff thus.
Clutch controller 10 is for being controlled power-transfer clutch 7.Hub motor control device 11 is for being controlled wheel hub motor 3.Engine controller 12 is for being controlled driving engine 4.ISG electric machine controller 13 is for being controlled ISG motor 6.Entire car controller 14 is controlled clutch controller 10, hub motor control device 11, engine controller 12 and ISG electric machine controller 13 for the mode of operation according to four-drive hybrid electric vehicle.
In one embodiment of the invention, entire car controller 14 is connected with clutch controller 10, hub motor control device 11, engine controller 12 and ISG electric machine controller 13 by the CAN bus.The CAN bus has high reliability and the good advantages such as error detection capability.
In one embodiment of the invention, four-drive hybrid electric vehicle also comprises the abs controller (not shown), and abs controller is connected with entire car controller 14 by the CAN bus.
In one embodiment of the invention, four-drive hybrid electric vehicle also comprises the battery manager (not shown), battery manager is connected with entire car controller 14 with electrokinetic cell 9, under the control at entire car controller 14, electrokinetic cell 9 being carried out to the charging and discharging management.Particularly, battery manager can be controlled electrokinetic cell 9 in generating state, and now, electric current flows to wheel hub motor 3 and ISG motor 6 by electrokinetic cell 9 through inverter 8; Battery manager also can be controlled electrokinetic cell 9 in charge condition, now, wheel hub motor 3 and ISG motor 6 can be reclaimed by the energy when braking, and after inverter 8, to electrokinetic cell 9 chargings, realizes thus the recovery of energy.
Below according to the four-drive hybrid electric vehicle of the specific embodiment explanation embodiment of the present invention, under different operating modes, adopt different drive patterns to realize distributing rationally between wheel hub motor 3, driving engine 4 and ISG motor 6.When carrying out the drive pattern selection, can using preset vehicle speed as a choice criteria, preset vehicle speed can be arranged and is stored in entire car controller 14 according to the characteristic of actual wheel hub motor 3, driving engine 4 and ISG motor 6.
In one embodiment of the invention, when four-drive hybrid electric vehicle during in pure motorized motions pattern, entire car controller 14 disconnects by clutch controller 10 control clutchs 7, and by hub motor control device 11 and/or wheel hub motors 3 controlled by ISG electric machine controller 13 and/or 6 pairs of four-drive hybrid electric vehicles of ISG motor are driven.
For example, when automobile starting and the speed of a motor vehicle lower than preset vehicle speed, simultaneously in the situation of electrokinetic cell 9 electric power abundances, entire car controller 14 can be controlled wheel hub motor 4 by hub motor control device 11 and drive separately front-wheel 1 to make running car, or also by ISG electric machine controller 13 control ISG motors 6, drives separately trailing wheel 2 to make running car.Wherein, adopt the ISG motor 6 of high-peak power both to have guaranteed fast starting function so that ISG motor 6 has good independent driveability, guarantee again the dynamic property of car load under electric-only mode.
In one embodiment of the invention, when the electric weight of electrokinetic cell 9 is greater than default charge value, at four-drive hybrid electric vehicle startup control four-drive hybrid electric vehicle processed, enter pure motorized motions pattern.In the situation that electrokinetic cell 9 electric power abundances, driving engine 4 can not worked, entire car controller 14 is controlled wheel hub motor 4 and is controlled ISG motor 6 by ISG electric machine controller 13 by hub motor control device 11 and drives running car simultaneously, realizes thus four wheel drive in short-term.
Four-drive hybrid electric vehicle according to the embodiment of the present invention, under pure motorized motions pattern, adopt motor 3 and/or ISG motor 6 to be driven, characteristic due to the motor low speed high torque, can make automobile start fast, greatly shorten pick-up time, reduced oil consumption and the discharge of automobile simultaneously, improved fuel economy.
In one embodiment of the invention, after the speed of a motor vehicle of four-drive hybrid electric vehicle is greater than the first pre-set velocity value, four-drive hybrid electric vehicle enters pure engine mode, entire car controller 14 passes through clutch controller 10 control clutch 7 closures so that driving engine 4 accesses, and start by engine controller 12 control engines 4, and control wheel hub motor 3 and 4 idle running of ISG motor by hub motor control device 11 and ISG electric machine control 13 devices.Wherein, after four-drive hybrid electric vehicle startup a period of time speed of a motor vehicle is greater than the first pre-set velocity value, the operation point of driving engine 4 is in more efficient scope, fuel economy is relatively good, and now control engine 4 work can utilize the slack time of pure engine mode to carry out electrokinetic cell 9 chargings.
In one embodiment of the invention, after the speed of a motor vehicle of four-drive hybrid electric vehicle is greater than the second pre-set velocity value, four-drive hybrid electric vehicle enters moderate and mixes the 4 wheel driven pattern, entire car controller 14 is controlled 3 pairs of front-wheels 1 of wheel hub motor by hub motor control device 11 and is driven, wherein, the second pre-set velocity value is greater than the first pre-set velocity value.Particularly, when four-drive hybrid electric vehicle travels after a period of time to be greater than the first pre-set velocity value, may accelerate to make the speed of a motor vehicle to be greater than the second pre-set velocity value, now can drive front-wheel 1 to exceed economic work zone power in addition to make up driving engine 4 by wheel hub motor 3, thereby make driving engine 4 be operated in efficient region, realize optimum drive efficiency, improved the acceleration capability of fuel economy and vehicle.
In one embodiment of the invention, after the speed of a motor vehicle of four-drive hybrid electric vehicle is greater than the 3rd pre-set velocity value, four-drive hybrid electric vehicle enters the strong dark 4 wheel driven pattern of closing, entire car controller 14 is controlled 6 pairs of trailing wheels 2 of ISG motor by ISG electric machine controller 13 and is driven, wherein, the 3rd pre-set velocity value is greater than the second pre-set velocity value.Particularly, when four-drive hybrid electric vehicle travels after a period of time to be greater than the second pre-set velocity value, may accelerate to make the speed of a motor vehicle to be greater than the 3rd pre-set velocity value, now control engine 4, wheel hub motor 3 and ISG motor 6 are worked simultaneously, high-power output can be provided, make tractive performance and the torque output of automobile reach best, improve tractive performance and the cross country power of automobile, meet the needs at different operating modes and driving intention.
In one embodiment of the invention, when four-drive hybrid electric vehicle slows down or brakes, four-drive hybrid electric vehicle enters the regenerative brake pattern, entire car controller 14 enters power generation mode by hub motor control device 11 and/or ISG motor controller controls 13 wheel hub motors 3 and/or ISG motor 6, so that electrokinetic cell 9 is charged.Thus, the kinetic transformation of four-drive hybrid electric vehicle is become to electric energy, be stored in electrokinetic cell 9, there is good braking ability simultaneously, improved deceleration and stopping performance and capacity usage ratio.
The diagram of circuit of the control method of the four-drive hybrid electric vehicle that Fig. 4 is one embodiment of the invention.As shown in Figure 4, according to the control method of the four-drive hybrid electric vehicle of the embodiment of the embodiment of the present invention, wherein four-drive hybrid electric vehicle can be the described four-drive hybrid electric vehicle of above-mentioned any one embodiment, and its control method comprises the steps.
Step S101, the current vehicle speed of detection four-drive hybrid electric vehicle.
Step S102, select corresponding mode of operation according to current vehicle speed.
Step S103, control the one or more driving four-drive hybrid electric vehicles in wheel hub motor 3, driving engine 4 and ISG motor 5 according to mode of operation.
Control method according to the four-drive hybrid electric vehicle of the embodiment of the embodiment of the present invention, can select flexibly mode of operation according to the speed of a motor vehicle of four-drive hybrid electric vehicle, can select corresponding mode according to different mode of operations, realize distributing rationally between driving engine, wheel hub motor and ISG motor, can guarantee when driving power is large to have higher fuel economy.
In one embodiment of the invention, be less than the first pre-set velocity value if the current vehicle speed of four-drive hybrid electric vehicle detected, four-drive hybrid electric vehicle enters pure motorized motions pattern, control clutch 7 disconnects, and controls wheel hub motor 3 and/or 6 pairs of four-drive hybrid electric vehicles of ISG motor are driven.For example, when automobile starting and the speed of a motor vehicle, lower than the first pre-set velocity value, in the situation of electrokinetic cell 9 electric power abundances, can control wheel hub motor 4 and drive separately front-wheel 1 to make running car simultaneously, or also control ISG motor 6 and drive separately trailing wheel 2 to make running car.Wherein, adopt the ISG motor 6 of high-peak power both to have guaranteed fast starting function so that ISG motor 6 has good independent driveability, guarantee again the dynamic property of car load under electric-only mode.
In one embodiment of the invention, detect the electric weight of electrokinetic cell 9, if the electric weight of electrokinetic cell 9 is greater than default charge value, at four-drive hybrid electric vehicle startup control four-drive hybrid electric vehicle processed, enter pure motorized motions pattern.In the situation that electrokinetic cell 9 electric power abundances, driving engine 4 can not worked, and controls wheel hub motor 4 and control ISG motor 6 to drive running car simultaneously, realizes thus four wheel drive in short-term.
Control method according to the four-drive hybrid electric vehicle of the embodiment of the present invention, under pure motorized motions pattern, adopt motor 3 and/or ISG motor 6 to be driven, characteristic due to the motor low speed high torque, can make automobile start fast, greatly shorten pick-up time, reduced oil consumption and the discharge of automobile simultaneously, improved fuel economy.
In one embodiment of the invention, after if the speed of a motor vehicle of four-drive hybrid electric vehicle is greater than the first pre-set velocity value, four-drive hybrid electric vehicle enters pure engine mode, control clutch 7 closures are so that driving engine 4 accesses, and control engine 4 startups, and control wheel hub motor 3 and 6 idle running of ISG motor.Wherein, after four-drive hybrid electric vehicle startup a period of time speed of a motor vehicle is greater than the first pre-set velocity value, the operation point of driving engine 4 is in more efficient scope, fuel economy is relatively good, and now control engine 4 work can utilize the slack time of pure engine mode to carry out electrokinetic cell 9 chargings.
In one embodiment of the invention, after if the speed of a motor vehicle of four-drive hybrid electric vehicle is greater than the second pre-set velocity value, four-drive hybrid electric vehicle enters moderate mixing 4 wheel driven pattern, controls 3 pairs of front-wheels 1 of wheel hub motor and is driven, wherein, the second pre-set velocity value is greater than the first pre-set velocity value.Particularly, when four-drive hybrid electric vehicle travels after a period of time to be greater than the first pre-set velocity value, may accelerate to make the speed of a motor vehicle to be greater than the second pre-set velocity value, now can drive front-wheel 1 to exceed economic work zone power in addition to make up driving engine 4 by wheel hub motor 3, thereby make driving engine 4 be operated in efficient region, realize optimum drive efficiency, improved the acceleration capability of fuel economy and vehicle.
In one embodiment of the invention, after if the speed of a motor vehicle of four-drive hybrid electric vehicle is greater than the 3rd pre-set velocity value, four-drive hybrid electric vehicle enters the strong dark 4 wheel driven pattern of closing, and controls 6 pairs of trailing wheels 2 of ISG motor and is driven, wherein, the 3rd pre-set velocity value is greater than the second pre-set velocity value.Particularly, when four-drive hybrid electric vehicle travels after a period of time to be greater than the second pre-set velocity value, may accelerate to make the speed of a motor vehicle to be greater than the 3rd pre-set velocity value, now control engine 4, wheel hub motor 3 and ISG motor 6 are worked simultaneously, high-power output can be provided, make tractive performance and the torque output of automobile reach best, improve tractive performance and the cross country power of automobile, meet the needs at different operating modes and driving intention.
In one embodiment of the invention, detect four-drive hybrid electric vehicle and whether enter deceleration or braking mode, if entering, four-drive hybrid electric vehicle slows down or braking mode, four-drive hybrid electric vehicle enters the regenerative brake pattern, control wheel hub motor 3 and/or ISG motor 6 and enter power generation mode, so that electrokinetic cell 9 is charged.Thus, the kinetic transformation of four-drive hybrid electric vehicle is become to electric energy, be stored in electrokinetic cell 9, there is good braking ability simultaneously, improved deceleration and stopping performance and capacity usage ratio.
In the description of this specification sheets, the description of reference term " embodiment ", " some embodiment ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is by claims and be equal to and limit.
Claims (19)
1. a four-drive hybrid electric vehicle, is characterized in that, comprising:
Front-wheel and trailing wheel;
Wheel hub motor, described wheel hub motor is connected with described front-wheel, for driving described front-wheel;
Driving engine, described driving engine is connected with described trailing wheel by change-speed box, for driving described trailing wheel;
Start the ISG motor of power generation all-in-one machine, described ISG motor is connected between described driving engine and described change-speed box, for driving described trailing wheel;
Power-transfer clutch, described power-transfer clutch is connected between described driving engine and described ISG motor;
Inverter, described inverter is connected with described ISG motor with described wheel hub motor respectively; With
Electrokinetic cell, described electrokinetic cell is connected with inverter, is used to described wheel hub motor and described ISG motor that power is provided.
2. four-drive hybrid electric vehicle as claimed in claim 1, is characterized in that, also comprises:
Clutch controller, for being controlled described power-transfer clutch;
The hub motor control device, for being controlled described wheel hub motor;
Engine controller, for being controlled described driving engine;
The ISG electric machine controller, for being controlled described ISG motor; With
Entire car controller, controlled described clutch controller, hub motor control device, engine controller and ISG electric machine controller for the mode of operation according to described four-drive hybrid electric vehicle.
3. four-drive hybrid electric vehicle as claimed in claim 2, is characterized in that, described entire car controller is connected with described clutch controller, hub motor control device, engine controller and ISG electric machine controller by the CAN bus.
4. four-drive hybrid electric vehicle as claimed in claim 1, is characterized in that, also comprises:
Retarder and diff, described change-speed box is connected with described trailing wheel with diff by described retarder.
5. four-drive hybrid electric vehicle as claimed in claim 2, is characterized in that, also comprises:
Battery manager, described battery manager is connected with described entire car controller with described electrokinetic cell, under the control of described entire car controller, described electrokinetic cell being carried out to the charging and discharging management.
6. four-drive hybrid electric vehicle as claimed in claim 3, is characterized in that, also comprises:
Abs controller, described abs controller is connected with described entire car controller by described CAN bus.
7. four-drive hybrid electric vehicle as claimed in claim 2, it is characterized in that, when described four-drive hybrid electric vehicle during in pure motorized motions pattern, described entire car controller is controlled described power-transfer clutch by described clutch controller and is disconnected, and by described hub motor control device and/or the described wheel hub motor of ISG motor controller controls and/or ISG motor, described four-drive hybrid electric vehicle is driven.
8. four-drive hybrid electric vehicle as claimed in claim 7, it is characterized in that, when the electric weight of described electrokinetic cell is greater than default charge value, at the described four-drive hybrid electric vehicle of described four-drive hybrid electric vehicle startup control system, enter described pure motorized motions pattern.
9. four-drive hybrid electric vehicle as claimed in claim 2, it is characterized in that, after the speed of a motor vehicle of described four-drive hybrid electric vehicle is greater than the first pre-set velocity value, described four-drive hybrid electric vehicle enters pure engine mode, it is closed so that described driving engine access that described entire car controller is controlled described power-transfer clutch by described clutch controller, and by the described engine starting of described engine controller controls, and by described hub motor control device and the described wheel hub motor of described ISG motor controller controls and the idle running of described ISG motor.
10. four-drive hybrid electric vehicle as claimed in claim 9, it is characterized in that, after the speed of a motor vehicle of described four-drive hybrid electric vehicle is greater than the second pre-set velocity value, described four-drive hybrid electric vehicle enters moderate and mixes the 4 wheel driven pattern, described entire car controller is controlled described wheel hub motor by described hub motor control device described front-wheel is driven, wherein, described the second pre-set velocity value is greater than described the first pre-set velocity value.
11. four-drive hybrid electric vehicle as claimed in claim 10, it is characterized in that, after the speed of a motor vehicle of described four-drive hybrid electric vehicle is greater than the 3rd pre-set velocity value, described four-drive hybrid electric vehicle enters the strong dark 4 wheel driven pattern of closing, described entire car controller is driven described trailing wheel by the described ISG motor of described ISG motor controller controls, wherein, described the 3rd pre-set velocity value is greater than described the second pre-set velocity value.
12. four-drive hybrid electric vehicle as claimed in claim 2, it is characterized in that, when described four-drive hybrid electric vehicle slows down or brakes, described four-drive hybrid electric vehicle enters the regenerative brake pattern, described entire car controller enters power generation mode by described hub motor control device and/or the described wheel hub motor of described ISG motor controller controls and/or described ISG motor, so that described electrokinetic cell is charged.
13. the control method of a four-drive hybrid electric vehicle, is characterized in that, described four-drive hybrid electric vehicle is the described four-drive hybrid electric vehicle of any one in claim 1-12, said method comprising the steps of:
S1: the current vehicle speed that detects described four-drive hybrid electric vehicle;
S2: according to described current vehicle speed, select corresponding mode of operation; And
S3: according to described mode of operation, control the described four-drive hybrid electric vehicle of one or more drivings in described wheel hub motor, described driving engine and described ISG motor.
14. the control method of four-drive hybrid electric vehicle as claimed in claim 13, it is characterized in that, if the current vehicle speed of described four-drive hybrid electric vehicle is less than the first pre-set velocity value, described four-drive hybrid electric vehicle enters pure motorized motions pattern, control described power-transfer clutch and disconnect, and control described wheel hub motor and/or the ISG motor is driven described four-drive hybrid electric vehicle.
15. the control method of four-drive hybrid electric vehicle as claimed in claim 14, is characterized in that, also comprises:
Detect the electric weight of described electrokinetic cell; And
If the electric weight of described electrokinetic cell is greater than default charge value, at the described four-drive hybrid electric vehicle of described four-drive hybrid electric vehicle startup control system, enter described pure motorized motions pattern.
16. the control method of four-drive hybrid electric vehicle as claimed in claim 14, it is characterized in that, after if the speed of a motor vehicle of described four-drive hybrid electric vehicle is greater than described the first pre-set velocity value, described four-drive hybrid electric vehicle enters pure engine mode, control described power-transfer clutch closed so that described driving engine access, and control described engine starting, and control described wheel hub motor and the idle running of described ISG motor.
17. the control method of four-drive hybrid electric vehicle as claimed in claim 16, it is characterized in that, after if the speed of a motor vehicle of described four-drive hybrid electric vehicle is greater than the second pre-set velocity value, described four-drive hybrid electric vehicle enters moderate mixing 4 wheel driven pattern, controlling described wheel hub motor is driven described front-wheel, wherein, described the second pre-set velocity value is greater than described the first pre-set velocity value.
18. the control method of four-drive hybrid electric vehicle as claimed in claim 17, it is characterized in that, after if the speed of a motor vehicle of described four-drive hybrid electric vehicle is greater than the 3rd pre-set velocity value, described four-drive hybrid electric vehicle enters the strong dark 4 wheel driven pattern of closing, controlling described ISG motor is driven described trailing wheel, wherein, described the 3rd pre-set velocity value is greater than described the second pre-set velocity value.
19. the control method of four-drive hybrid electric vehicle as claimed in claim 13, is characterized in that, also comprises:
Detect described four-drive hybrid electric vehicle and whether enter deceleration or braking mode;
If described four-drive hybrid electric vehicle enters, slow down or braking mode, described four-drive hybrid electric vehicle enters the regenerative brake pattern, controls described wheel hub motor and/or described ISG motor enters power generation mode, so that described electrokinetic cell is charged.
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