CN102756727A - Torque control method for hybrid power vehicle - Google Patents

Torque control method for hybrid power vehicle Download PDF

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Publication number
CN102756727A
CN102756727A CN2011101071852A CN201110107185A CN102756727A CN 102756727 A CN102756727 A CN 102756727A CN 2011101071852 A CN2011101071852 A CN 2011101071852A CN 201110107185 A CN201110107185 A CN 201110107185A CN 102756727 A CN102756727 A CN 102756727A
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motor
torque
mode
pattern
driving engine
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CN102756727B (en
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周宇星
朱军
马成杰
赵沂
邱国茂
孔令安
邓晓光
姜辛
张鹏君
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SAIC Motor Corp Ltd
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SAIC Motor Corp Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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    • Y02T10/62—Hybrid vehicles

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Abstract

The invention discloses a torque control method for a hybrid power vehicle. A hybrid power vehicle controller is coupled with an engine controller, a speed changer controller, a motor controller, a battery controller, a brake antilock controller and a vehicle body controller through a vehicle local area network bus in a communication way so as to realize the torque control method. The torque control method comprises the following steps: judging current hybrid power mode of the hybrid power vehicle; determining a vehicle required torque and current torques related with an engine and a motor; determining target torques of the engine and the motor according to the current hybrid power mode, the vehicle required torque and the current torques related with the engine and the motor; and after the engine controller and the motor controller receive the target torques of the engine and the motor distributed by the hybrid power vehicle controller, controlling the engine and the motor to gradually achieve the respective target torques. The method has the advantages of low cost, better control accuracy, better fuel economy and easier matching with the vehicle.

Description

A kind of motor vehicle driven by mixed power torque control method
[technical field]
The present invention relates to a kind of motor vehicle driven by mixed power torque control method.Particularly, the present invention relates to the parallel hybrid vehicles torque control method.
[background technology]
Vehicle has also brought " energy resource consumption, environmental pollution " two large problems when offering convenience to people.Each big vehicle manufacturer has released the motor vehicle driven by mixed power of the combustion engine conjunction with motor of energy-conservation and environmental protection respectively for this reason.Motor vehicle driven by mixed power comprises two types: tandem and parallel.The power system of serial mixed power vehicle comprises driving engine, electrical generator and electrical motor, and this serial mixed power vehicle finally all will come drive wheels by electrical motor no matter operate under which kind of operating mode.The power system of parallel hybrid vehicles comprises driving engine and motor, and driving engine and motor can be separately perhaps with the mode powered vehicle of mechanical energy stack, and motor not only can be used as electrical motor but also can use as electrical generator.For BSG (Belt Driven Starter Generator) parallel hybrid vehicles; Owing to adopt the BSG technology; The BSG technology has idle stop and start-up function; Thereby realize vehicle driving engine break-off during with traffic congestion before red light, eliminate fuel oil consumption and exhaust emissions under the idle state.In addition,, remedy engine-driven weakness, make driving engine remain on optimum condition work, can realize functions such as for example electric power-assisted driving and energy feedback thereby can bring into play motor-driven advantage owing to adopt parallel way.Therefore, the BSG parallel hybrid vehicles had both improved the driving performance and the fuel economy of vehicle, had also reduced discharging simultaneously.Prior art has proposed multiple control method to parallel hybrid vehicles.
Write by people such as Tong Yi, name is called " motor vehicle driven by mixed power torque management strategy ", the document that is published on " Tsing-Hua University's journal (natural science edition) " 2003 the 43rd the 8th phase of volume discloses a kind of motor vehicle driven by mixed power torque management strategy.Wherein this parallel hybrid vehicles is characterised in that whether motor between power-transfer clutch and automatic transmission with hydraulic torque converter, participates in the driving to vehicle by the clutch control combustion engine.When automatic transmission with hydraulic torque converter and power-transfer clutch all engaged, internal-combustion engine rotational speed and motor speed and the speed of a motor vehicle had the certain proportion relation.Torque management strategy in the controller is reasonably distributed to combustion engine and motor with the torque demand of automatic transmission with hydraulic torque converter input end in real time.This motor vehicle driven by mixed power torque management strategy is the basis with combustion engine stable state efficiency characteristic figure, and moment of torsion as main variable in the torque management strategy, is carried out reasonable distribution to combustion engine and motor outputting power in real time.The defective of this control method is that the motor vehicle driven by mixed power pattern is less relatively, is unfavorable for the motor vehicle driven by mixed power moment of torsion is carried out accuracy control, thereby is unfavorable for improving better the driving performance and the fuel economy of vehicle, and be unfavorable for reducing better discharging.
Thereby expectation provides that a kind of cost is low, control accuracy is better, more be prone to coupling and the better parallel hybrid vehicles torque control method of fuel economy with car load.
[summary of the invention]
The purpose of this invention is to provide a kind of parallel hybrid vehicles torque control method, to address the deficiencies of the prior art.The object of the invention is achieved through following technical scheme:
A technical scheme of the present invention provides a kind of motor vehicle driven by mixed power torque control method; Wherein motor vehicle driven by mixed power comprise driving engine, first motor, the high-tension battery, the change-speed box that join with the first motor coupling and be used for control unit that driving engine, first motor, change-speed box and high-tension battery are kept watch on and controlled; Driving engine is connected with first motor through connecting device; The power of the driving engine and/or first motor is sent to wheel through change-speed box and diff; Control unit comprises hybrid vehicle controller that is used to realize torque control method and the engine controller and first electric machine controller that joins and communicate by letter with the hybrid vehicle controller coupling, and wherein said method may further comprise the steps:
Step 1: hybrid vehicle controller is judged the current hybrid mode of motor vehicle driven by mixed power based on the current demand signal relevant with the hybrid mode of motor vehicle driven by mixed power;
Step 2: hybrid vehicle controller is based on confirming driving engine current torque T with driving engine and first Motor torque and the relevant signal of vehicle needs moment of torsion E_p, the first motor current torque T M_p/ T G_p, the current available torque T of driving engine E_u, the current available torque T of first motor M_u, driving engine current torque restricted T E_l, the first motor current torque restricted T M_l/ T G_lAnd vehicle needs torque T Dt_req, vehicle needs torque T wherein Dt_reqComprise the engine demand torque T E_reqWith the first motor demand torque T M_req/ T G_req, wherein the first motor demand torque is the first motor-driven demand torque T M_reqThe perhaps first electric power generation demand torque T G_req
Step 3: hybrid vehicle controller is based on the current hybrid mode and the vehicle needs torque T of motor vehicle driven by mixed power Dt_reqAnd the current available torque T of binding engine E_uAnd the current available torque T of first motor M_uConfirm the engine target torque T E_tarAnd the first motor target torque T G_tar/ T M_tar, and driving engine and first motor target torque separately receive driving engine current torque restricted T E_lWith the first motor current torque restricted T M_l/ T G_lRestriction; And
Step 4: after the engine controller and first electric machine controller were received the driving engine and the first motor target torque that hybrid vehicle controller distributes, the control driving engine and first motor were respectively based on driving engine current torque T E_pWith the first motor current torque T M_p/ T G_pProgressively realize target torque separately.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides; Wherein control unit also comprises gearbox controller, battery controller, braking anti-lock controller and car body controller, and hybrid vehicle controller joins with these controller couplings through the vehicle local area network bus and communicates by letter.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides, wherein change-speed box is an automatic transmission with hydraulic torque converter, it is connected with driving engine through turbine transformer.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides, wherein relevant with the hybrid mode of motor vehicle driven by mixed power current demand signal comprise that accelerator pedal signal, brake pedal signal, the current tach signal of driving engine, driving engine current torque signal, driving engine maximum available torque signal, driving engine minimum are kept torque signal, the current available torque signal of driving engine, driving engine current torque restricting signal, ECT Engine Coolant Temperature signal, the current tach signal of first motor, the first motor current torque signal, the current available torque signal of first motor, the first motor current torque restricting signal, high-tension battery voltage and current signal, high-tension battery can be with discharging and recharging power signal, high-tension battery remaining power signal, GES, wheel slip state signal, key switch status signal, anti-theft state signal, the current gear of change-speed box and object gear signal and turbine transformer status signal.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides wherein comprises that with driving engine and first Motor torque and the relevant signal of vehicle needs moment of torsion driving engine current torque signal, driving engine maximum available torque signal, driving engine minimum keep torque signal, driving engine current torque restricting signal, the first motor current torque signal, the current available torque signal of first motor and the first motor current torque restricting signal.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides; Wherein the current hybrid mode of the motor vehicle driven by mixed power in the step 1 is the wherein a kind of hybrid mode in auto-stop pattern, automatic originate mode, electric idling pattern, idling power generation mode, traditional charge mode, intelligent charge pattern, motor assistant mode, energy feedback pattern, gearshift smooth mode, first start pattern and the " shut " mode"; Wherein at any time, motor vehicle driven by mixed power only is under a kind of hybrid mode.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides, wherein when motor vehicle driven by mixed power is in the first start pattern, the vehicle needs torque T Dt_reqProvided by the actuating motor and/or first motor, its size is for overcoming engine crankshaft stiction required torque.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides, wherein when motor vehicle driven by mixed power is in " shut " mode", the vehicle needs torque T Dt_reqProvided by driving engine, its size is calculated through following formula:
T Dt_req=P Me* (T Emax-T Emin)+T Emin, wherein, P MeFor chaufeur to engine torque desirability, T EmaxBe driving engine maximum available torque, T EminFor the driving engine minimum is kept moment of torsion.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides, wherein when motor vehicle driven by mixed power is in traditional charge mode, intelligent charge pattern or idling power generation mode, the vehicle needs torque T Dt_reqProvided by the driving engine and first motor, its size is calculated through following formula:
T Dt_req=P Me* (T Emax-T Emin)+T Emin+ P T* T G_req, P wherein TBe the transmitting ratio between the driving engine and first motor, T G_reqIt is the first electric power generation demand torque.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides, wherein when motor vehicle driven by mixed power is in the auto-stop pattern, the vehicle needs torque T Dt_reqThe first motor-driven demand torque T of its size for setting according to the current rotating speed of driving engine is provided by first motor M_req
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides, wherein when motor vehicle driven by mixed power is in automatic originate mode, the vehicle needs torque T Dt_reqThe first motor-driven demand torque T of its size for setting according to the current rotating speed of driving engine is provided by first motor M_req
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides, wherein when motor vehicle driven by mixed power is in the motor assistant mode, the vehicle needs torque T Dt_reqProvided by the driving engine and first motor, its size is calculated through following formula:
T Dt_req=P Me* (T Emax-T Emin)+T Emin+ P Mm* T M_u, P wherein MmFor chaufeur to the Motor torque desirability.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides, wherein when motor vehicle driven by mixed power is in energy feedback pattern, the vehicle needs torque T Dt_reqThe first electric power generation demand torque T of its size for setting according to the current gear of motor vehicle driven by mixed power and the speed of a motor vehicle is provided by first motor G_req
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides wherein is in gearshift during smooth mode, the vehicle needs torque T when motor vehicle driven by mixed power Dt_reqBe zero.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides is wherein worked as motor vehicle driven by mixed power and is in electric idling pattern and is in the independent idling mode of first motor, then vehicle needs torque T Dt_reqProvided by first motor, its size is for to maintain the first required electric idling demand torque T of engine idle target with driving engine Idle1
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides is wherein worked as motor vehicle driven by mixed power and is in electric idling pattern and is in driving engine and the common idling mode of first motor, then vehicle needs torque T Dt_reqProvided by the driving engine and first motor, its size is calculated through following formula:
T Dt_req=P Me* (T Emax-T Emin)+T Emin+ P T* T Idle2, T wherein Idle2For driving engine being maintained the second required electric idling demand torque of engine idle target.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides, wherein hybrid vehicle controller can redirect between corresponding motor vehicle driven by mixed power hybrid mode based on the redirect condition of each hybrid mode.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides, wherein motor vehicle driven by mixed power can jump to first start pattern or traditional power generation mode from " shut " mode", and can jump to " shut " mode" from other ten kinds of patterns.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides; Wherein motor vehicle driven by mixed power can also jump to traditional power generation mode or " shut " mode" from the first start pattern, and can jump to the first start pattern from " shut " mode".
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides; Wherein motor vehicle driven by mixed power can also jump to idling power generation mode or intelligent charge pattern or " shut " mode" from traditional power generation mode, and can jump to traditional power generation mode from other ten kinds of patterns.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides; Wherein motor vehicle driven by mixed power can jump to intelligent charge pattern or electric idling pattern or auto-stop pattern or energy feedback pattern or traditional power generation mode or " shut " mode" from the idling power generation mode, and can jump to the idling power generation mode from automatic originate mode or energy feedback pattern or intelligent charge pattern or electric idling pattern or transmission power generation mode.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides, wherein motor vehicle driven by mixed power can jump to energy feedback pattern or motor assistant mode or idling power generation mode or traditional power generation mode or " shut " mode" from the intelligent charge pattern; And can be from energy feedback pattern or shift gears smooth mode or motor assistant mode or electric idling pattern or traditional power generation mode or originate mode or idling power generation mode jump to the intelligent charge pattern automatically.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides, wherein motor vehicle driven by mixed power can jump to motor assistant mode or energy feedback pattern or intelligent charge pattern or traditional power generation mode or " shut " mode" from the gearshift smooth mode; And can jump to the gearshift smooth mode from energy feedback pattern.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides; Wherein motor vehicle driven by mixed power can jump to energy feedback pattern or intelligent charge pattern or traditional power generation mode " shut " mode" from the motor assistant mode, and can jump to the motor assistant mode from gearshift smooth mode or intelligent charge pattern.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides, wherein motor vehicle driven by mixed power can jump to electric idling pattern or idling power generation mode or intelligent charge pattern or shift gears smooth mode or traditional power generation mode or " shut " mode" from energy feedback pattern; And can jump to energy feedback pattern from idling power generation mode or intelligent charge pattern or shift gears smooth mode or motor assistant mode.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides; Wherein motor vehicle driven by mixed power can jump to automatic originate mode or traditional power generation mode or " shut " mode" from the auto-stop pattern, and can jump to the auto-stop pattern from electric idling pattern or idling power generation mode.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides; Wherein motor vehicle driven by mixed power can jump to " shut " mode" or electric idling pattern or idling power generation mode or intelligent charge pattern or traditional power generation mode from automatic originate mode, and can jump to automatic originate mode from the auto-stop pattern.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides; Wherein motor vehicle driven by mixed power can jump to idling power generation mode or intelligent charge pattern or auto-stop pattern or traditional power generation mode or " shut " mode" from electric idling pattern, and can the idling power generation mode or originate mode or energy feedback pattern jump to electric idling pattern automatically.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides, wherein connecting device is selected from a kind of in belt, chain, steel band, the transmission shaft.
The motor vehicle driven by mixed power torque control method that technique scheme according to the present invention provides is wherein in above-mentioned steps 3, when hybrid vehicle controller is judged the engine demand torque T E_reqWith the first motor demand torque T M_req/ T G_reqDo not receive the current available torque T of driving engine respectively E_uWith the current available torque T of first motor M_uRestriction the time, hybrid vehicle controller is with the engine demand torque T E_reqWith the first motor demand torque T M_req/ T G_reqConfirm as the engine target torque T respectively E_tarWith the first motor target torque T G_tar/ T M_tar.
According to motor vehicle driven by mixed power torque control method provided by the invention and use the advantage of the motor vehicle driven by mixed power of this method to be: cost is low, and more is prone to coupling with car load.
According to the motor vehicle driven by mixed power torque control method provided by the invention and being also advantageous in that of motor vehicle driven by mixed power of using this method: because this method can combine to confirm driving engine and motor target torque with the current hybrid mode of the motor vehicle driven by mixed power in vehicle needs moment of torsion and the 11 kinds of hybrid mode; This makes that the control accuracy of motor vehicle driven by mixed power is better, thereby has improved fuel economy better and reduced discharging.
[description of drawings]
With reference to accompanying drawing, disclosure of the present invention will be easier to understand.Those skilled in the art c is understood that easily: these accompanying drawings only are used for casehistory technical scheme of the present invention, and are not to be intended to protection scope of the present invention is constituted restriction.Among the figure:
Fig. 1 shows the structural representation of BSG parallel hybrid vehicles power system.And
Fig. 2 shows the diagram of circuit of the torque control method of motor vehicle driven by mixed power as shown in Figure 1.
Parts and label list
1 Driving engine
2 First motor
3 Automatic transmission with hydraulic torque converter
3a Turbine transformer
4 High-tension battery
4a A-battery
5 Engine controller
6 First electric machine controller
7 Automatic transmission controller
8 Battery controller
9 Hybrid vehicle controller
10 The vehicle local area network bus
11 Diff
12 Wheel
12a Axletree
13 Inverter
14 Electric load
[specific embodiment]
Fig. 1-2 and following declarative description optional embodiment of the present invention how to implement with instruction those skilled in the art and reproduce the present invention.In order to instruct technical scheme of the present invention, simplified or omitted some conventional aspects.Those skilled in the art should understand that the modification or the replacement that are derived from these embodiments will drop in protection scope of the present invention.Those skilled in the art should understand that following characteristics can make up to form a plurality of modification of the present invention in every way.Thus, the present invention is not limited to following optional embodiment, and is only limited claim and their equivalent.
Fig. 1 shows a kind of power system of bel-drivenn parallel hybrid vehicles, and this power system comprises: driving engine 1, first motor 2, turbine transformer 3a, automatic transmission with hydraulic torque converter 3, high-tension battery 4, engine controller 5, first electric machine controller 6, automatic transmission controller 7, battery controller 8, hybrid vehicle controller 9, vehicle local area network bus 10, diff 11, axletree 12a and wheel 12.Motor vehicle driven by mixed power also comprises braking anti-lock controller and car body controller.To those skilled in the art, the annexation of braking anti-lock controller and car body controller and hybrid vehicle controller 9 or other controllers and miscellaneous part is known, thereby not shown in the drawings these two kinds of controllers.The driving engine 1 of the power system of motor vehicle driven by mixed power as shown in Figure 1 and/or the power of first motor 2 are sent to diff 11 through turbine transformer 3a and automatic transmission with hydraulic torque converter 3, be sent to wheel 12 through diff 11 again, thereby powered vehicle are advanced.The driving engine 1 and first motor 2 are through belt-driving, and first motor 2 can be electric generator/electric motor.First motor 2 joins with high-tension battery 4 couplings, and high-tension battery 4 joins through inverter 13 and A-battery 4a coupling, joins between inverter 13 and A-battery 4a with electric load 14 couplings.9 pairs of engine controllers of hybrid vehicle controller 5, first electric machine controller 6, automatic transmission controller 7, battery controller 8, braking anti-lock controller and car body controller carry out the co-operative control effect, communicate through vehicle local area network bus 10 between them.The state of 5 pairs of driving engines 1 of engine controller is kept watch on and is controlled; 6 pairs first motors of first electric machine controller are managed; 7 couples of turbine transformer 3a of automatic transmission controller and automatic transmission with hydraulic torque converter 3 are kept watch on and are controlled; Battery controller 8 is mainly used in the battery charging and discharging function and the electric residue amount of keeping watch on and managing high-tension battery 4; The braking anti-lock controller is mainly used in to be controlled the car speed sensor in the anti-skid brake system, electromagnetic valve and pump, and car body controller has the controllable function of antitheft etc. usually.
Fig. 2 shows the diagram of circuit of the torque control method of motor vehicle driven by mixed power as shown in Figure 1.As shown in Figure 2; A kind of motor vehicle driven by mixed power torque control method is provided; Wherein the motor vehicle driven by mixed power gearbox controller that comprises hybrid vehicle controller, driving engine, engine controller, change-speed box, turbine transformer, join with the change-speed box coupling and communicate by letter, first motor, first electric machine controller with turbine transformer, with the high-tension battery of first motor coupling couplet, with high-tension battery coupling couplet and battery controller, braking anti-lock controller, car body controller and the vehicle local area network bus of communicating by letter; Driving engine is connected with change-speed box through turbine transformer; Change-speed box is sent to wheel through diff with the power of the driving engine and/or first motor; Driving engine is connected with first motor through connecting device; Be used to realize the transmission of power between the driving engine and first motor; Hybrid vehicle controller joins through vehicle local area network bus and engine controller, gearbox controller, first electric machine controller, battery controller, braking anti-lock controller, car body controller coupling and communicates with them, thereby realizes said torque control method, said method comprising the steps of:
Step S10: the motor vehicle driven by mixed power torque control method begins;
Step S20: hybrid vehicle controller is judged the current hybrid mode of motor vehicle driven by mixed power based on the current demand signal relevant with the hybrid mode of motor vehicle driven by mixed power;
Step S30: hybrid vehicle controller is based on confirming driving engine current torque T with driving engine and first Motor torque and the relevant signal of vehicle needs moment of torsion E_p, the first motor current torque T M_p/ T G_p, the current available torque T of driving engine E_u, the current available torque T of first motor M_u, driving engine current torque restricted T E_l, the first motor current torque restricted T M_l/ T G_lAnd vehicle needs torque T Dt_req, vehicle needs torque T wherein Dt_reqComprise the engine demand torque T E_reqWith the first motor demand torque T M_req/ T G_req, wherein the first motor demand torque is the first motor-driven demand torque T M_reqThe perhaps first electric power generation demand torque T G_req
Step S40: hybrid vehicle controller is based on the current hybrid mode and the vehicle needs torque T of motor vehicle driven by mixed power Dt_reqAnd the current available torque T of binding engine E_uAnd the current available torque T of first motor M_uConfirm the engine target torque T E_tarAnd the first motor target torque T G_tar/ T M_tar, and driving engine and first motor target torque separately receive driving engine current torque restricted T E_lWith the first motor current torque restricted T M_l/ T G_lRestriction;
Step S50: after the engine controller and first electric machine controller were received the driving engine and the first motor target torque that hybrid vehicle controller distributes, the control driving engine and first motor were respectively based on driving engine current torque T E_pWith the first motor current torque T M_p/ T G_pProgressively realize target torque separately; And
Step S60: the motor vehicle driven by mixed power torque control method finishes.
In above-mentioned steps S20, the current demand signal relevant with the hybrid mode of motor vehicle driven by mixed power comprises that accelerator pedal signal, brake pedal signal, the current tach signal of driving engine, driving engine current torque signal, driving engine maximum available torque signal, driving engine minimum are kept torque signal, driving engine current torque restricting signal, ECT Engine Coolant Temperature signal, the current tach signal of first motor, the first motor current torque signal, the current available torque signal of first motor, the first motor current torque restricting signal, high-tension battery voltage and current signal, high-tension battery can be with discharging and recharging power signal, high-tension battery remaining power signal, GES, wheel slip state signal, key switch status signal, anti-theft state signal, the current gear of change-speed box and object gear signal and turbine transformer status signal.Those skilled in the art are understood that easily the current demand signal relevant with the hybrid mode of motor vehicle driven by mixed power can also comprise other signals, and this also will drop in protection scope of the present invention.
In above-mentioned steps S30, comprise that with driving engine and first Motor torque and the relevant signal of vehicle needs moment of torsion driving engine current torque signal, driving engine maximum available torque signal, driving engine minimum keep torque signal, the current available torque signal of driving engine, driving engine current torque restricting signal, the first motor current torque signal, the current available torque signal of first motor and the first motor current torque restricting signal.Those skilled in the art are understood that easily, can also comprise other signals with driving engine and first Motor torque and the relevant signal of vehicle needs moment of torsion, and this will drop in protection scope of the present invention also.
In above-mentioned steps S40, judge the engine demand torque T at hybrid vehicle controller E_reqWith the first motor demand torque T M_req/ T G_reqDo not receive the current available torque T of driving engine respectively E_uWith the current available torque T of first motor M_uDuring restriction, hybrid vehicle controller is with the engine demand torque T E_reqWith the first motor demand torque T M_req/ T G_reqConfirm as the engine target torque T respectively E_tarWith the first motor target torque T G_tar/ T M_tarNeed to prove the engine target torque T E_tarWith the first motor target torque T G_tar/ T M_tarAlso can receive driving engine current torque restricted T E_lWith the first motor current torque restricted T M_l/ T G_lRestriction.
In this article, " the vehicle needs moment of torsion is unrestricted " is meant that hybrid vehicle controller judges the current available torque T of driving engine E_u, the current available torque T of first motor M_u, driving engine current torque restricted T E_lWith the first motor current torque restricted T M_l/ T G_lCan satisfy the engine demand torque T respectively E_reqWith the first motor demand torque T M_req/ T G_reqRequest, hybrid vehicle controller is with the engine demand torque T E_reqWith the first motor demand torque T M_req/ T G_reqConfirm as the engine target torque T respectively E_tarWith the first motor target torque T G_tar/ T M_tarSituation.
In above-mentioned steps S20; The current hybrid mode of motor vehicle driven by mixed power is the wherein a kind of hybrid mode in auto-stop pattern, automatic originate mode, electric idling pattern, idling power generation mode, traditional charge mode, intelligent charge pattern, motor assistant mode, energy feedback pattern, gearshift smooth mode, first start pattern and the " shut " mode"; Wherein at any time, motor vehicle driven by mixed power only is under a kind of hybrid mode.
The definition of above-mentioned 11 kinds of hybrid mode is following:
The first start pattern is meant the pattern with key initial start-up driving engine.The first start pattern is divided into that the 12V actuating motor starts separately, BSG starts separately and 12V actuating motor and BSG unite three kinds of modes of starting.Under these three kinds of modes of this pattern, the vehicle needs torque T Dt_reqProvided by 12V actuating motor and/or BSG, its size is for overcoming engine crankshaft stiction required torque.
" shut " mode" is meant the state when major failure appears in vehicle initial condition or the vehicle before the first start pattern, and all mix moving functions (be that BSG quits work, driving engine works independently) and are closed under this pattern.Under this pattern, the vehicle needs torque T Dt_reqProvided by driving engine, its size is calculated through following formula:
T Dt_req=P Me* (T Emax-T Emin)+T Emin, P wherein MeFor chaufeur to engine torque desirability, T EmaxBe driving engine maximum available torque, T EminFor the driving engine minimum is kept moment of torsion.
The tradition charge mode is meant that motor vehicle driven by mixed power is in the conventional truck state, and BSG only is used for the high-tension battery electric weight is maintained predetermined aspiration level and satisfies the demand of 12V with electric load 14 as electrical generator.Under this pattern, the vehicle needs torque T Dt_reqProvided by the driving engine and first motor, its size is calculated through following formula:
T Dt_req=P Me* (T Emax-T Emin)+T Emin+ P T* T G_req, P wherein TBe the transmitting ratio between driving engine and the BSG, T G_reqIt is the first electric power generation demand torque.
The intelligent charge pattern is meant that the Das Gaspedal degree of depth is greater than zero and less than Das Gaspedal degree of depth predetermined value; Hybrid vehicle controller is according to the efficient of high-tension battery dump energy (SOC) state, the gentle driving engine of engine water; Regulate the BSG power generation torque; High-tension battery SOC is maintained predetermined aspiration level, make engine operation at relative high efficient area.Under this pattern, the vehicle needs torque T Dt_reqProvided by the driving engine and first motor, its size is calculated through following formula:
T Dt_req=P Me* (T Emax-T Emin)+T Emin+ P T* T G_req, P wherein TBe the transmitting ratio between the driving engine and first motor, T G_reqIt is the first electric power generation demand torque.
The motor assistant mode is that the Das Gaspedal degree of depth allows greater than Das Gaspedal degree of depth predetermined value and battery charging and discharging ability, and BSG sends predetermined positive moment of torsion and helps driving engine that vehicle is quickened.Under this pattern, the vehicle needs torque T Dt_reqProvided by the driving engine and first motor, its size is calculated through following formula:
T Dt_req=P Me* (T Emax-T Emin)+T Emin+ P Mm* T M_u, P wherein MmFor chaufeur to the first Motor torque desirability.
Energy feedback pattern is meant that vehicle slides or chaufeur is stepped on brake pedal and made car retardation; If the lock-up clutch locking of turbine transformer, thereby axletree 12a towing astern BSG generating is stored a part of inertia energy or the braking energy mode with electric energy on the high-tension battery into.Under this pattern, the vehicle needs torque T Dt_reqOnly provided by the BSG motor, its size is the first electric power generation demand torque that the current gear of motor vehicle driven by mixed power and the speed of a motor vehicle set.
The gearshift smooth mode is meant under the energy feedback pattern that if any gearshift the power generation torque that removes BSG is accomplished to help gearshift.Under this pattern, the vehicle needs torque T Dt_reqBe zero.
The auto-stop pattern is meant that chaufeur steps on brake pedal that stops of stopping, and engine stoping operation cancel traditional parking idling, with the raising fuel economy.Under this pattern, the vehicle needs torque T Dt_reqThe first motor-driven demand torque value that its size sets for the current rotating speed of driving engine is provided by motor.
Automatically after originate mode was meant that vehicle gets into the auto-stop pattern, chaufeur loosen the brake or other hardware condition triggered and cause system to withdraw from the auto-stop pattern.Under this pattern, the vehicle needs torque T Dt_reqThe first motor-driven demand torque T of its size for setting according to the current rotating speed of driving engine is provided by first motor M_req
Electricity idling pattern is meant that motor keeps the engine idle target, and its effect is that the electric idling after the starting automatically guarantees to start automatically to the smooth transition of engine idle or the electric idling before the auto-stop and guarantees other state seamlessly transitting to automatic starting state.Electricity idling pattern comprises the independent idling of BSG motor and driving engine and the common idling of BSG motor.When motor vehicle driven by mixed power is in electric idling pattern and is in the independent idling mode of BSG motor, vehicle needs torque T then Dt_reqProvided by motor, its size is for to maintain the first required electric idling demand torque T of engine idle target with driving engine Idle1When motor vehicle driven by mixed power is in electric idling pattern and is in driving engine and during the common idling mode of motor, vehicle needs torque T then Dt_reqProvided by the driving engine and first motor, its size is calculated through following formula:
T Dt_req=P Me* (T Emax-T Emin)+T Emin+ T Idle2, T wherein Idle2For driving engine being maintained the second required electric idling demand torque of engine idle target.
The idling power generation mode is meant that hybrid vehicle controller detects that automatic transmission with hydraulic torque converter is in the D shelves and driving engine is in idling mode, thereby the BSG generating is kept preset level basically with the electric weight of high-tension battery and kept the 12V electric load and use.When motor vehicle driven by mixed power is in the idling power generation mode, the vehicle needs torque T Dt_reqProvided by driving engine, its size is calculated through following formula:
T Dt_req=P Me* (T Emax-T Emin)+T Emin+ P T* T G_req, P wherein TBe the transmitting ratio between driving engine and the motor, T G_reqIt is the first electric power generation demand torque.
In above-mentioned steps S20; Be in when hybrid vehicle controller 9 detects key that closed condition, electric machine controller do not enable, the high-tension battery main switch do not have closure or driving engine to be in flameout state and motor vehicle driven by mixed power not satisfy in starting or first start or auto-stop pattern or the hybrid power function condition of closing automatically, then motor vehicle driven by mixed power gets into " shut " mode".Wherein the hybrid power power function condition of closing is meant: major failure appears in system, and for example torque monitoring reports an error, the fault of motor or battery and High-Voltage Insulation fault etc.
In above-mentioned steps S20, key switch is in open mode, engine starting completion and driving engine smooth operation, gear is in other gear beyond the D shelves or the gearshift pattern is under winter/manual mode or battery can be used the available discharge power invalidating signal of discharge power less than first preset value or battery when hybrid vehicle controller 9 detects; Force to get into traditional charge mode condition and satisfy (be that some fault appears in system, for example battery cell electric weight overbalance or monomer voltage are crossed and exceeded lowly, and battery is overheated etc.); Electric machine controller gets under the default power generation mode and the hybrid power function condition of closing does not satisfy, and then motor vehicle driven by mixed power gets into traditional charge mode.
In above-mentioned steps S20, when detecting the first start entry condition, satisfies hybrid vehicle controller 9, and then motor vehicle driven by mixed power gets into the first start pattern.
In above-mentioned steps S20; When hybrid vehicle controller 9 detect the Das Gaspedal aperture greater than Das Gaspedal degree of depth predetermined value, effective, the non-gearshift of accelerator pedal signal in, do not step on brake pedal and motor power-assisted and can satisfy with condition, then motor vehicle driven by mixed power gets into the motor assistant mode.Wherein the motor power-assisted can be meant with condition: battery can be with discharge power second preset value, battery SOC greater than the SOC of battery dump energy first preset value, battery and available discharge power signal effectively and electric machine controller enables and motor vehicle driven by mixed power does not get into and forces traditional charge mode greater than the expection battery with discharge power.
In above-mentioned steps S20, when hybrid vehicle controller 9 detect vehicle idling and the general entry condition of electric idling satisfy and satisfy energy feedback pattern after during electric idling entry condition, then motor vehicle driven by mixed power gets into electric idling pattern.The general entry condition of wherein electric idling is meant: battery can use discharge power, the current available torque of first motor and battery SOC can use discharge power the 3rd preset value, current available torque first preset value of first motor and battery dump energy second preset value and three signals effective greater than corresponding battery; Engine speed is less than engine speed first preset value; The speed of a motor vehicle is less than the speed of a motor vehicle first preset value; Engine speed and GES are effective; Driving engine is in the oil-break state; TCC is locking not.Electric idling entry condition is meant after the energy feedback pattern: battery can satisfy greater than battery dump energy the 3rd preset value, auto-stop entry condition and steps on brake pedal greater than battery with discharge power with discharge power the 4th preset value, battery SOC.In addition, when hybrid vehicle controller 9 detected following any electric idling exit criteria, hybrid vehicle withdrawed from electric idling pattern.Wherein electric idling exit criteria is meant: the DC-DC power signal is invalid; Battery can use discharge power can use discharge power the 5th preset value less than battery; The SOC of battery is less than battery dump energy the 4th preset value; The gearshift pattern is not in mixes moving economic model; Driving engine does not have oil-break; Accelerator pedal signal is invalid; Battery available output invalidating signal; The BSG moment of torsion surpasses preset value; The BSG torque signal is invalid; The battery SOC invalidating signal; First motor is in default power generation mode; Gear is not automatic originate mode at D shelves and preceding state; The electricity time of idle running surpasses preset value; The maximum electrical dynamic torque of first motor is less than the maximum electrical dynamic torque preset value of first motor; The speed of a motor vehicle is that electric idling surpasses preset electric time of idle running and driving engine is not in idling mode (Das Gaspedal is trampled by chaufeur) under zero the state.
In above-mentioned steps S20, when being in idling mode when hybrid vehicle controller 9 detects motor vehicle driven by mixed power, satisfying energy feedback pattern and not satisfying the entry condition of other pattern of entering, then motor vehicle driven by mixed power gets into energy feedback pattern.
In above-mentioned steps S20, when hybrid vehicle controller 9 detected motor vehicle driven by mixed power and is in non-idling mode and satisfy do not get into the condition of other state, then motor vehicle driven by mixed power got into the intelligent charge pattern.
In above-mentioned steps S20, when hybrid vehicle controller 9 detects vehicle idling and do not satisfy under the situation of other pattern entry condition, then motor vehicle driven by mixed power gets into the idling power generation mode.
In above-mentioned steps S20, when detecting motor vehicle driven by mixed power auto-stop enabled condition, satisfies when satisfying hybrid vehicle controller 9 with the auto-stop entry condition, and then motor vehicle driven by mixed power gets into the auto-stop pattern.Wherein auto-stop enabled condition is: refer to that TR allows to shut down at one grade, change-speed box, engine speed is lower than engine speed second preset value, the current tach signal of driving engine effectively and satisfy the general entry condition of auto-stop, wherein the general entry condition of auto-stop is meant: the change-speed box complementary pump does not have that fault, air-conditioning allow to shut down, first electric machine controller is not in default charge mode and ECT Engine Coolant Temperature signal, battery SOC signal, battery available output signal, DC-DC power signal, brake vacuum degree signal, brake pedal signal, ambient temperature signal, accelerator pedal signal, GES, ramp signal are effective.The auto-stop entry condition is meant: brake pedal is operated; The speed of a motor vehicle is zero and surpasses Preset Time; Between surpassing, twice shutdown should surpass Preset Time; Change-speed box is shut down the automatic neutral control in back and is not worked; The current available torque of first motor surpasses current available torque second preset value of first motor; The ramp is less than the ramp preset value; Battery can surpass battery with discharge power can use discharge power the 6th preset value; The SOC of battery surpasses battery dump energy the 5th preset value; The general entry condition of auto-stop satisfies.Wherein the general entry condition of auto-stop is meant: driving engine is not forbidden shutting down; The speed of a motor vehicle needs to surpass the speed of a motor vehicle second preset value after change-speed box is suspended to the D shelves at every turn; The speed of a motor vehicle is being shut down above need just allowing to shut down once more above behind the speed of a motor vehicle second preset value behind certain number of times continuously; Driving engine is in idling mode; ABS is inoperative; ECT Engine Coolant Temperature surpasses the ECT Engine Coolant Temperature preset value; The brake vacuum degree surpasses brake vacuum degree preset value; Do not find collide (the collision signal is arranged); Preceding storehouse drowning is opened; The DC-DC electric current is lower than DC-DC electric current preset value; According to the floor time of the electric load of battery SOC and DC-DC estimation greater than preset floor time.
In above-mentioned steps S20, be the energy regenerating condition when hybrid vehicle controller 9 detects the motor vehicle driven by mixed power preceding state, when object gear was not equal to actual-gear and object gear and is higher than third gear, then motor vehicle driven by mixed power got into the gearshift smooth mode.
In above-mentioned steps S20; Surpass the preset maximum auto-stop time when hybrid vehicle controller 9 detects the motor vehicle driven by mixed power auto-stop time, brake pedal is released, Das Gaspedal is operated, the speed of a motor vehicle surpasses the preset vehicle speed value, when battery can use discharge power can use discharge power the 7th preset value, battery less than battery SOC after floor time surpasses minimum floor time, to surpass preset DC-DC current value and motor current available torque less than preset motor current available torque less than preset ECT Engine Coolant Temperature or brake vacuum degree less than the electric current of preset brake vacuum degree, DC-DC less than preset ambient temperature or ECT Engine Coolant Temperature less than battery dump energy the 6th preset value or ambient temperature, then motor vehicle driven by mixed power gets into automatic originate mode.
Under above-mentioned 11 kinds of patterns, first electric machine controller need be considered the current available torque restriction of first motor under generating and drive pattern.Wherein under drive pattern, the current driving torque of first motor that first electric machine controller is confirmed according to the motor vehicle driven by mixed power current state limits; Electric machine controller can limit with the first maximum available motor-driven demand torque that discharge power and the current revolution counter of first motor are calculated according to battery; The electronic characteristic of first motor, first rotating speed of motor and the function of torsional interaction time; Low excessively like battery dump energy, limit the first motor-driven demand torque in proportion; Low excessively like cell pressure, limit the first motor-driven demand torque in proportion; The hardware constraints of belt; Racing of the engine should limit the first motor-driven moment of torsion.Electric machine controller is according to choose the first minimum motor-driven demand torque with limit, as the restriction of the current available driving torque of first motor.Under above-mentioned 11 kinds of patterns, first electric machine controller need be considered the current available torque restriction of first motor under power generation mode; First electric machine controller is according to the first electric power generation torque limited of current state decision; Can be according to battery with the maximum available power generation torque restriction of first motor that charge power and current motor revolution counter are calculated; The charge characteristic of first motor, first rotating speed of motor and the function of torsional interaction time; Very high like battery dump energy, limit the first electric power generation moment of torsion in proportion; Very high like cell pressure, limit the first electric power generation moment of torsion in proportion; The hardware constraints of belt and engine speed are low excessively, should limit the first electric power generation moment of torsion.First electric machine controller is chosen the restriction of the first minimum electric power generation moment of torsion as the current available power generation torque of first motor according to limit.
In above-mentioned 11 kinds of patterns, redirect each other between some pattern.First start failure vehicle can jump to " shut " mode" from the first start pattern; Vehicular impact or start fail are automatically opened, are found in the discovery High-Voltage Insulation when perhaps starting automatically, and vehicle can jump to " shut " mode" from automatic originate mode; Perhaps electric idling exit criteria satisfies, and electric idling decision is withdrawed from or vehicle is in that non-idling surpasses Preset Time, engine starting is not accomplished or engine speed during less than preset engine speed, and vehicle can jump to " shut " mode" from electric idling pattern; Perhaps during the auto-stop pattern, find High-Voltage Insulation open, find Vehicular impact, find before Cang Gai open, then vehicle can jump to " shut " mode" from the auto-stop pattern; Perhaps key switch is closed or driving engine does not change and system does not open perhaps at the starting state of starting/auto-stop/automatically or hybrid dynamic system dependent failure or high-tension battery main switch that first electric machine controller does not enable, and then vehicle can jump to " shut " mode" from other patterns.
When motor vehicle driven by mixed power is in " shut " mode"; Key switch closure, vehicle are not in the hard closing state, the high-tension battery main switch is closed, first electric machine controller enables, engine starting is accomplished and above condition satisfies and surpass certain Preset Time if hybrid controller 9 detects, and then motor vehicle driven by mixed power jumps to traditional charge mode from " shut " mode".Perhaps, when motor vehicle driven by mixed power was in " shut " mode", entry condition satisfied if hybrid controller 9 detects starting, and then motor vehicle driven by mixed power jumps to the first start pattern from " shut " mode".
When motor vehicle driven by mixed power is in the first start pattern; When hybrid controller 9 detected that key switch closure, engine starting are accomplished and above condition satisfies and passed through certain Preset Time, then motor vehicle driven by mixed power jumped to traditional charge mode from the first start pattern.And when motor vehicle driven by mixed power is in other any state; Hybrid controller 9 detect key switch closure, driving engine accomplish starting, system not starting or closed condition, driving engine is stable and have cause getting into traditional electrically-charged fault, tradition charging entry condition satisfies or during the default charging of first motor; Motor vehicle driven by mixed power jumps to traditional charge mode from other states, and wherein other state is meant idling power generation mode, intelligent charge pattern, gearshift smooth mode, motor assistant mode, energy feedback pattern, auto-stop pattern, a kind of in originate mode and these eight kinds of patterns of electric idling pattern automatically.
When motor vehicle driven by mixed power satisfies and during the non-idling of vehicle, motor vehicle driven by mixed power can jump to the intelligent charge pattern from traditional charge mode from the traditional mode exit criteria.Perhaps when motor vehicle driven by mixed power from electric idling pattern withdraw from, the non-idling of vehicle, engine starting are accomplished, when stable, motor vehicle driven by mixed power can jump to the intelligent charge pattern from electric idling pattern to engine speed greater than preset engine speed and driving engine.Perhaps withdraw from and during vehicle idling, vehicle jumps to the intelligent charge pattern from the idling power generation mode from the idling power generation mode when motor vehicle driven by mixed power.Perhaps satisfy and during the non-idling of vehicle, then motor vehicle driven by mixed power jumps to the intelligent charge pattern from the motor assistant mode from motor assistant mode exit criteria when motor vehicle driven by mixed power.Perhaps when motor vehicle driven by mixed power from the gearshift smooth mode withdraw from, when the non-idling of vehicle and motor assistant mode entry condition do not satisfy, motor vehicle driven by mixed power jumps to the intelligent charge pattern from the gearshift smooth mode.Perhaps satisfy and during the non-idling of vehicle, motor vehicle driven by mixed power jumps to the intelligent charge pattern from energy feedback pattern from energy feedback pattern exit criteria when motor vehicle driven by mixed power.When perhaps starting completion, the non-idling of vehicle and driving engine smooth operation automatically, motor vehicle driven by mixed power jumps to the intelligent charge pattern from automatic originate mode.
When motor vehicle driven by mixed power from the intelligent charge pattern withdraw from, motor power-assisted entry condition satisfies and the motor power-assisted again entry condition satisfy, then motor vehicle driven by mixed power jumps to the motor assistant mode from the intelligent charge pattern.Perhaps withdraw from and motor assistant mode entry condition when satisfying from the gearshift smooth mode when motor vehicle driven by mixed power, motor vehicle driven by mixed power jumps to the motor assistant mode from the gearshift smooth mode.
When motor vehicle driven by mixed power from the intelligent charge pattern withdraw from, when vehicle idling and energy feedback entry condition satisfy, motor vehicle driven by mixed power jumps to energy feedback pattern from the intelligent charge pattern.Perhaps when motor vehicle driven by mixed power withdraws from from the gearshift smooth mode, the vehicle idling, non-shift process and during the lock-up clutch locking of turbine transformer, motor vehicle driven by mixed power jumps to energy feedback pattern from the gearshift smooth mode.Perhaps withdraw from and during vehicle idling, motor vehicle driven by mixed power jumps to energy feedback pattern from the motor assistant mode from the motor assistant mode when motor vehicle driven by mixed power.Perhaps when motor vehicle driven by mixed power from the idling power generation mode withdraw from, vehicle idling, energy feedback entry condition satisfy, auto-stop enabled condition does not satisfy and auto-stop entry condition when not satisfying, motor vehicle driven by mixed power jumps to energy feedback pattern from the idling power generation mode.
When motor vehicle driven by mixed power from energy feedback pattern withdraw from, actual-gear and object gear is inconsistent and object gear during greater than third gear, motor vehicle driven by mixed power jumps to the gearshift smooth mode from energy feedback pattern.
When motor vehicle driven by mixed power from electric idling pattern or idling power generation mode withdraw from, auto-stop enabled condition satisfies and auto-stop entry condition when satisfying, motor vehicle driven by mixed power jumps to the auto-stop pattern from electric idling pattern or idling power generation mode.
When motor vehicle driven by mixed power from the auto-stop pattern withdraw from and automatically starting conditions satisfy or auto-stop enabled condition when not satisfying, motor vehicle driven by mixed power jumps to automatic originate mode from the auto-stop pattern.When motor vehicle driven by mixed power withdraws from, finds that High-Voltage Insulation is opened from the auto-stop pattern, Vehicular impact or before Cang Gai open, then motor vehicle driven by mixed power jumps to " shut " mode" from the auto-stop pattern.
When motor vehicle driven by mixed power from automatic originate mode withdraw from, start automatically that the completion condition satisfies, vehicle idling, the general entry condition of electric idling satisfies and driving engine when stable; Perhaps withdraw from and during engine idle from energy feedback pattern when motor vehicle driven by mixed power; Perhaps when motor vehicle driven by mixed power from electric idling pattern withdraw from, engine starting is accomplished, engine speed withdraws to surpass greater than preset engine speed, the decision of electric idling and presets electric idling post-set time and driving engine when stable; Perhaps when motor vehicle driven by mixed power from the intelligent charge pattern withdraw from, when vehicle idling and energy feedback entry condition do not satisfy; Perhaps when motor vehicle driven by mixed power when the transmission power generation mode withdraws from, motor vehicle driven by mixed power jumps to the idling power generation mode from automatic starting or energy feedback or electric idling pattern or intelligent charge pattern or transmission power generation mode.
When motor vehicle driven by mixed power from automatic originate mode withdraw from, vehicle idling, automatically starting is accomplished and the general entry condition of electric idling when satisfying; Perhaps when motor vehicle driven by mixed power withdraws from from energy feedback pattern, vehicle idling, the general entry condition of electric idling satisfy and energy feedback pattern after electric idling entry condition when satisfying; Perhaps be enough to and preceding state when being intelligent charge or energy feedback pattern when motor vehicle driven by mixed power withdraws from from the idling power generation mode, vehicle idling, energy feedback entry condition do not satisfy, driving engine is in the oil-break state, TCC is opened, the general entry condition of electric idling satisfies, electric idling entry condition satisfies after the energy feedback, auto-stop enabled condition does not satisfy and the auto-stop entry condition is discontented, motor vehicle driven by mixed power jumps to electric idling pattern from automatic originate mode or energy feedback pattern or idling power generation mode.
According to motor vehicle driven by mixed power torque control method provided by the invention and use the advantage of the motor vehicle driven by mixed power of this method to be: cost is low, and more is prone to coupling with car load.
According to the motor vehicle driven by mixed power torque control method provided by the invention and being also advantageous in that of motor vehicle driven by mixed power of using this method: because this method can combine to confirm driving engine and motor target torque with the current hybrid mode of the motor vehicle driven by mixed power in vehicle needs moment of torsion and the 11 kinds of hybrid mode; This makes that the control accuracy of motor vehicle driven by mixed power is better, thereby has improved fuel economy better and reduced discharging.

Claims (30)

1. motor vehicle driven by mixed power torque control method; Wherein motor vehicle driven by mixed power comprise driving engine, first motor, the high-tension battery, the change-speed box that join with the first motor coupling and be used for control unit that driving engine, first motor, change-speed box and high-tension battery are kept watch on and controlled; Driving engine is connected with first motor through connecting device; The power of the driving engine and/or first motor is sent to wheel through change-speed box and diff; Control unit comprises hybrid vehicle controller that is used to realize said torque control method and the engine controller and first electric machine controller that joins and communicate by letter with the hybrid vehicle controller coupling; It is characterized in that, said method comprising the steps of:
Step 1: hybrid vehicle controller is judged the current hybrid mode of motor vehicle driven by mixed power based on the current demand signal relevant with the hybrid mode of motor vehicle driven by mixed power;
Step 2: hybrid vehicle controller is based on confirming driving engine current torque T with driving engine and first Motor torque and the relevant signal of vehicle needs moment of torsion E_p, the first motor current torque T M_p/ T G_p, the current available torque T of driving engine E_u, the current available torque T of first motor M_u, driving engine current torque restricted T E_l, the first motor current torque restricted T M_l/ T G_lAnd vehicle needs torque T Dt_req, vehicle needs torque T wherein Dt_reqComprise the engine demand torque T E_reqWith the first motor demand torque T M_req/ T G_req, wherein the first motor demand torque is the first motor-driven demand torque T M_reqThe perhaps first electric power generation demand torque T G_req
Step 3: hybrid vehicle controller is based on the current hybrid mode and the vehicle needs torque T of motor vehicle driven by mixed power Dt_reqAnd the current available torque T of binding engine E_uAnd the current available torque T of first motor M_uConfirm the engine target torque T E_tarAnd the first motor target torque T G_tar/ T M_tar, and driving engine and first motor target torque separately receive driving engine current torque restricted T E_lWith the first motor current torque restricted T M_l/ T G_lRestriction; And
Step 4: after the engine controller and first electric machine controller were received the driving engine and the first motor target torque that hybrid vehicle controller distributes, the control driving engine and first motor were respectively based on driving engine current torque T E_pWith the first motor current torque T M_p/ T G_pProgressively realize target torque separately.
2. method according to claim 1; It is characterized in that; Control unit also comprises gearbox controller, battery controller, braking anti-lock controller and car body controller, and hybrid vehicle controller joins with these controller couplings through the vehicle local area network bus and communicates by letter.
3. method according to claim 1 and 2 is characterized in that, change-speed box is an automatic transmission with hydraulic torque converter, and it is connected with driving engine through turbine transformer.
4. method according to claim 1; It is characterized in that the current demand signal relevant with the hybrid mode of motor vehicle driven by mixed power comprises that accelerator pedal signal, brake pedal signal, the current tach signal of driving engine, driving engine current torque signal, driving engine maximum available torque signal, driving engine minimum are kept torque signal, the current available torque signal of driving engine, driving engine current torque restricting signal, ECT Engine Coolant Temperature signal, the current tach signal of first motor, the first motor current torque signal, the current available torque signal of first motor, the first motor current torque restricting signal, high-tension battery voltage and current signal, high-tension battery can be with discharging and recharging power signal, high-tension battery remaining power signal, GES, wheel slip state signal, key switch status signal, anti-theft state signal, the current gear of change-speed box and object gear signal and turbine transformer status signal.
5. method according to claim 1; It is characterized in that, comprise that with driving engine and first Motor torque and the relevant signal of vehicle needs moment of torsion driving engine current torque signal, driving engine maximum available torque signal, driving engine minimum keep torque signal, driving engine current torque restricting signal, the first motor current torque signal, the current available torque signal of first motor and the first motor current torque restricting signal.
6. according to claim 1 or 4 described methods; It is characterized in that; The current hybrid mode of the motor vehicle driven by mixed power described in the step 1 is the wherein a kind of hybrid mode in auto-stop pattern, automatic originate mode, electric idling pattern, idling power generation mode, traditional charge mode, intelligent charge pattern, motor assistant mode, energy feedback pattern, gearshift smooth mode, first start pattern and the " shut " mode"; Wherein at any time, motor vehicle driven by mixed power only is under a kind of said hybrid mode.
7. method according to claim 6 is characterized in that, when motor vehicle driven by mixed power is in the first start pattern, and the vehicle needs torque T Dt_reqProvided by the actuating motor and/or first motor, its size is for overcoming engine crankshaft stiction required torque.
8. method according to claim 6 is characterized in that, when motor vehicle driven by mixed power is in " shut " mode", and the vehicle needs torque T Dt_reqProvided by driving engine, its size is calculated through following formula:
T Dt_req=P Me* (T Emax-T Emin)+T Emin, wherein, P MeFor chaufeur to engine torque desirability, T EmaxBe driving engine maximum available torque, T EminFor the driving engine minimum is kept moment of torsion.
9. method according to claim 6 is characterized in that, when motor vehicle driven by mixed power is in traditional charge mode, intelligent charge pattern or idling power generation mode, and the vehicle needs torque T Dt_reqProvided by the driving engine and first motor, its size is calculated through following formula:
T Dt_req=P Me* (T Emax-T Emin)+T Emin+ P T* T G_req, P wherein TBe the transmitting ratio between the driving engine and first motor, T G_reqIt is the first electric power generation demand torque.
10. method according to claim 6 is characterized in that, when motor vehicle driven by mixed power is in the auto-stop pattern, and the vehicle needs torque T Dt_reqThe first motor-driven demand torque T of its size for setting according to the current rotating speed of driving engine is provided by first motor M_req
11. method according to claim 6 is characterized in that, when motor vehicle driven by mixed power is in automatic originate mode, and the vehicle needs torque T Dt_reqThe first motor-driven demand torque T of its size for setting according to the current rotating speed of driving engine is provided by first motor M_req
12. method according to claim 6 is characterized in that, when motor vehicle driven by mixed power is in the motor assistant mode, and the vehicle needs torque T Dt_reqProvided by the driving engine and first motor, its size is calculated through following formula:
T Dt_req=P Me* (T Emax-T Emin)+T Emin+ P Mm* T M_u, P wherein MmFor chaufeur to the Motor torque desirability.
13. method according to claim 6 is characterized in that, when motor vehicle driven by mixed power is in energy feedback pattern, and the vehicle needs torque T Dt_reqThe first electric power generation demand torque T of its size for setting according to the current gear of motor vehicle driven by mixed power and the speed of a motor vehicle is provided by first motor G_req
14. method according to claim 6 is characterized in that, when motor vehicle driven by mixed power is in the gearshift smooth mode, and the vehicle needs torque T Dt_reqBe zero.
15. method according to claim 6 is characterized in that, when motor vehicle driven by mixed power is in electric idling pattern and is in the independent idling mode of first motor, then vehicle needs torque T Dt_reqProvided by first motor, its size is for to maintain the first required electric idling demand torque T of engine idle target with driving engine Idle1
16. method according to claim 6 is characterized in that, when motor vehicle driven by mixed power is in electric idling pattern and is in driving engine and the common idling mode of first motor, then vehicle needs torque T Dt_reqProvided by the driving engine and first motor, its size is calculated through following formula:
T Dt_req=P Me* (T Emax-T Emin)+T Emin+ P T* T Idle2, T wherein Idle2For driving engine being maintained the second required electric idling demand torque of engine idle target.
17. method according to claim 6 is characterized in that, hybrid vehicle controller can redirect between corresponding motor vehicle driven by mixed power hybrid mode based on the redirect condition of each hybrid mode.
18. method according to claim 6 is characterized in that, motor vehicle driven by mixed power can jump to first start pattern or traditional power generation mode from " shut " mode", and can jump to " shut " mode" from other ten kinds of patterns.
19. method according to claim 6 is characterized in that, motor vehicle driven by mixed power can also jump to traditional power generation mode or " shut " mode" from the first start pattern, and can jump to the first start pattern from " shut " mode".
20. method according to claim 6; It is characterized in that; Motor vehicle driven by mixed power can also jump to idling power generation mode or intelligent charge pattern or " shut " mode" from traditional power generation mode, and can jump to traditional power generation mode from other ten kinds of patterns.
21. method according to claim 6; It is characterized in that; Motor vehicle driven by mixed power can jump to intelligent charge pattern or electric idling pattern or auto-stop pattern or energy feedback pattern or traditional power generation mode or " shut " mode" from the idling power generation mode, and can jump to the idling power generation mode from automatic originate mode or energy feedback pattern or intelligent charge pattern or electric idling pattern or transmission power generation mode.
22. method according to claim 6 is characterized in that, motor vehicle driven by mixed power can jump to energy feedback pattern or motor assistant mode or idling power generation mode or traditional power generation mode or " shut " mode" from the intelligent charge pattern; And can be from energy feedback pattern or shift gears smooth mode or motor assistant mode or electric idling pattern or traditional power generation mode or originate mode or idling power generation mode jump to the intelligent charge pattern automatically.
23. method according to claim 6 is characterized in that, motor vehicle driven by mixed power can jump to motor assistant mode or energy feedback pattern or intelligent charge pattern or traditional power generation mode or " shut " mode" from the gearshift smooth mode; And can jump to the gearshift smooth mode from energy feedback pattern.
24. method according to claim 6; It is characterized in that; Motor vehicle driven by mixed power can jump to energy feedback pattern or intelligent charge pattern or traditional power generation mode " shut " mode" from the motor assistant mode, and can jump to the motor assistant mode from gearshift smooth mode or intelligent charge pattern.
25. method according to claim 6; It is characterized in that motor vehicle driven by mixed power can jump to electric idling pattern or idling power generation mode or intelligent charge pattern or shift gears smooth mode or traditional power generation mode or " shut " mode" from energy feedback pattern; And can jump to energy feedback pattern from idling power generation mode or intelligent charge pattern or shift gears smooth mode or motor assistant mode.
26. method according to claim 6; It is characterized in that; Motor vehicle driven by mixed power can jump to automatic originate mode or traditional power generation mode or " shut " mode" from the auto-stop pattern, and can jump to the auto-stop pattern from electric idling pattern or idling power generation mode.
27. method according to claim 6; It is characterized in that; Motor vehicle driven by mixed power can jump to " shut " mode" or electric idling pattern or idling power generation mode or intelligent charge pattern or traditional power generation mode from automatic originate mode, and can jump to automatic originate mode from the auto-stop pattern.
28. method according to claim 6; It is characterized in that; Motor vehicle driven by mixed power can jump to idling power generation mode or intelligent charge pattern or auto-stop pattern or traditional power generation mode or " shut " mode" from electric idling pattern, and can the idling power generation mode or originate mode or energy feedback pattern jump to electric idling pattern automatically.
29. method according to claim 1 is characterized in that, connecting device is selected from a kind of in belt, chain, steel band, the transmission shaft.
30. method according to claim 1 is characterized in that, in above-mentioned steps 3, when hybrid vehicle controller is judged the engine demand torque T E_reqWith the first motor demand torque T M_req/ T G_reqDo not receive the current available torque T of driving engine respectively E_uWith the current available torque T of first motor M_uRestriction the time, hybrid vehicle controller is with the engine demand torque T E_reqWith the first motor demand torque T M_req/ T G_reqConfirm as the engine target torque T respectively E_tarWith the first motor target torque T G_tar/ T M_tar
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