CN102756727B - Torque control method for hybrid power vehicle - Google Patents

Torque control method for hybrid power vehicle Download PDF

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Publication number
CN102756727B
CN102756727B CN201110107185.2A CN201110107185A CN102756727B CN 102756727 B CN102756727 B CN 102756727B CN 201110107185 A CN201110107185 A CN 201110107185A CN 102756727 B CN102756727 B CN 102756727B
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motor
mode
torque
driving engine
pattern
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CN102756727A (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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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/62Hybrid vehicles

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 hybrid vehicle torque control method
[technical field]
The present invention relates to a kind of hybrid vehicle torque control method.Specifically, the present invention relates to parallel hybrid vehicles torque control method.
[background technology]
Vehicle also brings " energy resource consumption, environmental pollution " two large problems bringing easily while.Ge great vehicle manufacturer is proposed the motor vehicle driven by mixed power of the combustion engine conjunction with motor of energy saving standard 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, under which kind of operating mode no matter this serial mixed power vehicle operate in, finally all will drive wheel by electrical motor.The power system of parallel hybrid vehicles comprises driving engine and motor, and driving engine and motor can drive vehicle separately or in the mode of mechanical energy superposition, and motor not only can be used as electrical motor but also can be used as electrical generator use.For BSG (Belt Driven Starter Generator) parallel hybrid vehicles; owing to adopting BSG technology; BSG technology has idle stop and start-up function; thus realize vehicle driving engine break-off before red light and when blocking up, eliminate the fuel oil consumption under idling state and exhaust emissions.In addition, owing to adopting parallel way, thus can play motor-driven advantage and make up engine-driven weakness, make driving engine remain on optimum condition work, the such as function such as electric power-assisted driving and energy feedback can be realized.Therefore, BSG parallel hybrid vehicles had both improve driving performance and the fuel economy of vehicle, also reduced discharge simultaneously.Prior art has proposed the multiple control method for parallel hybrid vehicles.
Write by people such as Tong Yi, name is called " hybrid vehicle torque operating strategy ", the document be published on " Tsing-Hua University's journal (natural science edition) " the 43rd volume the 8th phase in 2003 discloses a kind of hybrid vehicle torque operating strategy.Wherein this parallel hybrid vehicles is characterised in that motor is between power-transfer clutch and automatic transmission with hydraulic torque converter, whether participates in the driving to vehicle by clutch control combustion engine.When automatic transmission with hydraulic torque converter and power-transfer clutch all engage, internal-combustion engine rotational speed and motor speed and the speed of a motor vehicle have certain proportion relation.The torque demand of automatic transmission with hydraulic torque converter input end is reasonably distributed to combustion engine and motor by torsional moment transmission in controller in real time.This hybrid vehicle torque operating strategy is based on combustion engine stable state efficiency characteristic figure, and using moment of torsion main variable in torsional moment transmission, combustion motor and motor output power carry out reasonable distribution in real time.The defect of this control method is that motor vehicle driven by mixed power pattern is relatively less, is unfavorable for accurately controlling hybrid vehicle torque, thus is unfavorable for the driving performance and the fuel economy that improve vehicle better, and is unfavorable for reducing discharge better.
Thus, expect to provide that a kind of cost is low, control accuracy better, more easily mate and the better parallel hybrid vehicles torque control method of fuel economy with car load.
[summary of the invention]
The object of this invention is to provide a kind of parallel hybrid vehicles torque control method, to address the deficiencies of the prior art.Object of the present invention is achieved by the following technical programs:
A technical scheme of the present invention provides a kind of hybrid vehicle torque control method, wherein motor vehicle driven by mixed power comprises driving engine, first motor, the high-tension battery be coupled with the first motor, change-speed box and for driving engine, first motor, change-speed box and high-tension battery carry out the control unit of monitoring and controlling, driving engine is connected with the first motor by connecting device, the power of driving engine and/or the first motor is sent to wheel by change-speed box and diff, control unit comprises the hybrid vehicle controller for realizing torque control method and is coupled with hybrid vehicle controller and the engine controller communicated and the first electric machine controller, wherein said method comprises the following steps:
Step 1: hybrid vehicle controller judges the present hybrid pattern 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 the signal determination driving engine current torque T relevant with driving engine and the first Motor torque and 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 the 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, wherein vehicle needs torque T dt_reqcomprise engine demand torque T e_reqwith the first motor demand torque T m_req/ T g_req, wherein the first motor demand torque is that the first motor drives demand torque T m_reqor the first electric power generation demand torque T g_req;
Step 3: hybrid vehicle controller is based on the present hybrid pattern of motor vehicle driven by mixed power and vehicle needs torque T dt_reqand the current available torque T of binding engine e_uand the current available torque T of the first motor m_udetermine engine target torque T e_tarand the first motor target torque T g_tar/ T m_tar, and driving engine and the first motor target torque are separately subject to driving engine current torque restricted T e_lwith the first motor current torque restricted T m_l/ T g_lrestriction; And
Step 4: engine controller and the first electric machine controller control driving engine and the first motor respectively based on driving engine current torque T after receiving the driving engine and the first motor target torque that hybrid vehicle controller distributes e_pwith the first motor current torque T m_p/ T g_pprogressively realize respective target torque.
The hybrid vehicle torque control method that technique scheme according to the present invention provides, wherein control unit also comprises gearbox controller, battery controller, braking anti-locking controller and car body controller, and hybrid vehicle controller to be coupled with these controllers by Car Area Network bus and to communicate.
The hybrid vehicle torque control method that technique scheme according to the present invention provides, wherein change-speed box is automatic transmission with hydraulic torque converter, and it is connected with driving engine by turbine transformer.
The hybrid vehicle 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 comprises accelerator pedal signal, brake pedal signal, the current tach signal of driving engine, driving engine current torque signal, driving engine maximum available torque signal, the minimum maintenance torque signal of driving engine, the current available torque signal of driving engine, driving engine current torque restricting signal, Engine Coolant Temperature signal, the current tach signal of first motor, first motor current torque signal, the current available torque signal of first motor, first motor current torque restricting signal, high-tension battery voltage and current signal, high-tension battery can use charge-discharge electric power signal, high-tension battery remaining power signal, vehicle speed signal, wheel slip state signal, key switch status signal, anti-theft state signal, change-speed box current gear and target gear signal and turbine transformer status signal.
The hybrid vehicle torque control method that technique scheme according to the present invention provides, wherein relevant with driving engine and the first Motor torque and vehicle needs moment of torsion signal comprises driving engine current torque signal, driving engine maximum available torque signal, driving engine minimum maintenance torque signal, driving engine current torque restricting signal, the first motor current torque signal, the current available torque signal of the first motor and the first motor current torque restricting signal.
The hybrid vehicle torque control method that technique scheme according to the present invention provides; the present hybrid pattern of the motor vehicle driven by mixed power wherein in step 1 is the wherein a kind of hybrid mode in auto-stop pattern, automatically originate mode, electric idling mode, idling power generation mode, traditional charge mode, intelligent charge pattern, motor assistant mode, energy feedback pattern, gearshift smooth mode, first start pattern and " shut " mode"; wherein at any time, under motor vehicle driven by mixed power is only in a kind of hybrid mode.
The hybrid vehicle torque control method that technique scheme according to the present invention provides, wherein when motor vehicle driven by mixed power is in first start pattern, vehicle needs torque T dt_reqthered is provided by actuating motor and/or the first motor, its size is for overcoming engine crankshaft stiction required torque.
The hybrid vehicle torque control method that technique scheme according to the present invention provides, wherein when motor vehicle driven by mixed power is in " shut " mode", vehicle needs torque T dt_reqthered is provided by driving engine, its size is calculated by following formula:
T dt_req=P me× (T emax-T emin)+T emin, wherein, P mefor chaufeur is to engine torque demand degree, T emaxfor driving engine maximum available torque, T eminfor the minimum maintenance moment of torsion of driving engine.
The hybrid vehicle 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, vehicle needs torque T dt_reqthered is provided by driving engine and the first motor, its size is calculated by following formula:
T dt_req=P me× (T emax-T emin)+T emin+ P t× T g_req, wherein P tfor the transmitting ratio between driving engine and the first motor, T g_reqit is the first electric power generation demand torque.
The hybrid vehicle torque control method that technique scheme according to the present invention provides, wherein when motor vehicle driven by mixed power is in auto-stop pattern, vehicle needs torque T dt_reqthered is provided by the first motor, its size is the first motor driving demand torque T set by the current rotating speed of driving engine m_req.
The hybrid vehicle 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, vehicle needs torque T dt_reqthered is provided by the first motor, its size is the first motor driving demand torque T set by the current rotating speed of driving engine m_req.
The hybrid vehicle torque control method that technique scheme according to the present invention provides, wherein when motor vehicle driven by mixed power is in motor assistant mode, vehicle needs torque T dt_reqthered is provided by driving engine and the first motor, its size is calculated by following formula:
T dt_req=P me× (T emax-T emin)+T emin+ P mm× T m_u, wherein P mmfor chaufeur is to Motor torque desirability.
The hybrid vehicle 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, vehicle needs torque T dt_reqthered is provided by the first motor, its size is the first electric power generation demand torque T set by motor vehicle driven by mixed power current gear and the speed of a motor vehicle g_req.
The hybrid vehicle torque control method that technique scheme according to the present invention provides, wherein when motor vehicle driven by mixed power is in gearshift smooth mode, vehicle needs torque T dt_reqbe zero.
The hybrid vehicle torque control method that technique scheme according to the present invention provides, wherein when motor vehicle driven by mixed power is in electric idling mode and be in the independent idling mode of the first motor, then vehicle needs torque T dt_reqthered is provided by the first motor, its size is for maintaining the first electric idling demand torque T needed for engine idle target by driving engine idle1.
The hybrid vehicle torque control method that technique scheme according to the present invention provides, wherein when motor vehicle driven by mixed power is in electric idling mode and be in driving engine and the common idling mode of the first motor, then vehicle needs torque T dt_reqthered is provided by driving engine and the first motor, its size is calculated by following formula:
T dt_req=P me× (T emax-T emin)+T emin+ P t× T idle2, wherein T idle2for driving engine being maintained the second electric idling demand torque needed for engine idle target.
The hybrid vehicle 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 hybrid vehicle 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 conventional electric power generation pattern from " shut " mode", and can jump to " shut " mode" from other ten kinds of patterns.
The hybrid vehicle torque control method that technique scheme according to the present invention provides, wherein motor vehicle driven by mixed power can also jump to conventional electric power generation pattern or " shut " mode" from first start pattern, and can jump to first start pattern from " shut " mode".
The hybrid vehicle 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 conventional electric power generation pattern, and can jump to conventional electric power generation pattern from other ten kinds of patterns.
The hybrid vehicle 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 mode or auto-stop pattern or energy feedback pattern or conventional electric power generation pattern or " shut " mode" from idling power generation mode, and can jump to idling power generation mode from automatic originate mode or energy feedback pattern or intelligent charge pattern or electric idling mode or transmission power generation mode.
The hybrid vehicle 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 conventional electric power generation pattern or " shut " mode" from intelligent charge pattern; And can from energy feedback pattern or gearshift smooth mode or motor assistant mode or electric idling mode or conventional electric power generation pattern or originate mode or idling power generation mode jump to intelligent charge pattern automatically.
The hybrid vehicle 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 conventional electric power generation pattern or " shut " mode" from gearshift smooth mode; And gearshift smooth mode can be jumped to from energy feedback pattern.
The hybrid vehicle torque control method that technique scheme according to the present invention provides, wherein motor vehicle driven by mixed power can from motor assistant mode jump to energy feedback pattern or intelligent charge pattern or or conventional electric power generation pattern " shut " mode", and motor assistant mode can be jumped to from gearshift smooth mode or intelligent charge pattern.
The hybrid vehicle torque control method that technique scheme according to the present invention provides, wherein motor vehicle driven by mixed power can jump to electric idling mode or idling power generation mode or intelligent charge pattern or gearshift smooth mode or conventional electric power generation pattern or " shut " mode" from energy feedback pattern; And energy feedback pattern can be jumped to from idling power generation mode or intelligent charge pattern or gearshift smooth mode or motor assistant mode.
The hybrid vehicle 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 conventional electric power generation pattern or " shut " mode" from auto-stop pattern, and can jump to auto-stop pattern from electric idling mode or idling power generation mode.
The hybrid vehicle 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 mode or idling power generation mode or intelligent charge pattern or conventional electric power generation pattern from automatic originate mode, and can jump to automatic originate mode from auto-stop pattern.
The hybrid vehicle 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 conventional electric power generation pattern or " shut " mode" from electric idling mode, and can idling power generation mode or originate mode or energy feedback pattern jump to electric idling mode automatically.
The hybrid vehicle torque control method that technique scheme according to the present invention provides, wherein connecting device is selected from the one in belt, chain, steel band, transmission shaft.
The hybrid vehicle torque control method that technique scheme according to the present invention provides, wherein in above-mentioned steps 3, when hybrid vehicle controller judges engine demand torque T e_reqwith the first motor demand torque T m_req/ T g_reqrespectively not by the current available torque T of driving engine e_uwith the current available torque T of the first motor m_urestriction time, hybrid vehicle controller is by engine demand torque T e_reqwith the first motor demand torque T m_req/ T g_reqbe defined as engine target torque T respectively e_tarwith the first motor target torque T g_tar/ T m_tar.
According to hybrid vehicle torque control method provided by the invention and use the advantage of motor vehicle driven by mixed power of the method to be: cost is low, and more easily mates with car load.
According to hybrid vehicle torque control method provided by the invention and being also advantageous in that of motor vehicle driven by mixed power using the method: determine driving engine and motor target torque because vehicle needs moment of torsion can combine with the present hybrid pattern of the motor vehicle driven by mixed power in 11 kinds of hybrid mode by the method, this makes the control accuracy of motor vehicle driven by mixed power better, thus improves fuel economy better and decrease discharge.
[accompanying drawing explanation]
With reference to accompanying drawing, disclosure of the present invention will be easier to understand.Those skilled in the art c it is easily understood that: these accompanying drawings only for casehistory technical scheme of the present invention, and and are not intended to be construed as limiting protection scope of the present invention.In 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 Car Area Network bus
11 Diff
12 Wheel
12a Axletree
13 Inverter
14 Electric load
[detailed description of the invention]
Fig. 1-2 and following description describe Alternate embodiments of the present invention and how to implement to instruct those skilled in the art and to reproduce the present invention.In order to instruct technical solution of the present invention, simplifying or having eliminated some conventional aspects.Those skilled in the art should understand that the modification that is derived from these embodiments or replace and will drop in protection scope of the present invention.Those skilled in the art should understand that following characteristics can combine to form multiple modification of the present invention in every way.Thus, the present invention is not limited to following Alternate embodiments, and only by claim and their equivalents.
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, Car Area Network bus 10, diff 11, axletree 12a and wheel 12.Motor vehicle driven by mixed power also comprises braking anti-locking controller and car body controller.To those skilled in the art, the annexation of braking anti-locking controller and car body controller and hybrid vehicle controller 9 or other controllers and miscellaneous part is known, thus these two kinds of controllers not shown in the drawings.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 the first motor 2 are sent to diff 11 by turbine transformer 3a and automatic transmission with hydraulic torque converter 3, then are sent to wheel 12 by diff 11, thus drive vehicle to advance.Driving engine 1 and the first motor 2 are by belt-driving, and the first motor 2 can be electric generator/electric motor.First motor 2 is coupled with high-tension battery 4, and high-tension battery 4 is coupled with A-battery 4a by inverter 13, is coupled between inverter 13 and A-battery 4a by electric load 14.Hybrid vehicle controller 9 pairs of engine controllers 5, first electric machine controller 6, automatic transmission controller 7, battery controller 8, braking anti-locking controller and car body controller carry out cooperation control effect, are communicated between them by Car Area Network bus 10.The state of engine controller 5 pairs of driving engines 1 carries out monitoring and controlling, first electric machine controller 6 manages the first motor, automatic transmission controller 7 couples of turbine transformer 3a and automatic transmission with hydraulic torque converter 3 carry out monitoring and controlling, battery controller 8 is mainly used in the battery charging and discharging function and the electric residue amount that monitor and manage high-tension battery 4, braking anti-locking controller is mainly used in controlling the car speed sensor in anti-skid brake system, electromagnetic valve and pump, and car body controller has antitheft etc. controlling functions 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, provide a kind of hybrid vehicle torque control method, wherein motor vehicle driven by mixed power comprises hybrid vehicle controller, driving engine, engine controller, change-speed box, turbine transformer, be coupled and the gearbox controller communicated with change-speed box with turbine transformer, first motor, first electric machine controller, the high-tension battery be coupled with the first motor, be coupled with high-tension battery and the battery controller communicated, braking anti-locking controller, car body controller and Car Area Network bus, driving engine is connected with change-speed box by turbine transformer, the power of driving engine and/or the first motor is sent to wheel by diff by change-speed box, driving engine is connected with the first motor by connecting device, for realizing the transmission of power between driving engine and the first motor, hybrid vehicle controller is by Car Area Network bus and engine controller, gearbox controller, first electric machine controller, battery controller, braking anti-locking controller, car body controller is coupled and communicates with them, thus realizes described torque control method, said method comprising the steps of:
Step S10: hybrid vehicle torque control method starts;
Step S20: hybrid vehicle controller judges the present hybrid pattern 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 the signal determination driving engine current torque T relevant with driving engine and the first Motor torque and 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 the 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, wherein vehicle needs torque T dt_reqcomprise engine demand torque T e_reqwith the first motor demand torque T m_req/ T g_req, wherein the first motor demand torque is that the first motor drives demand torque T m_reqor the first electric power generation demand torque T g_req;
Step S40: hybrid vehicle controller is based on the present hybrid pattern of motor vehicle driven by mixed power and vehicle needs torque T dt_reqand the current available torque T of binding engine e_uand the current available torque T of the first motor m_udetermine engine target torque T e_tarand the first motor target torque T g_tar/ T m_tar, and driving engine and the first motor target torque are separately subject to driving engine current torque restricted T e_lwith the first motor current torque restricted T m_l/ T g_lrestriction;
Step S50: engine controller and the first electric machine controller control driving engine and the first motor respectively based on driving engine current torque T after receiving the driving engine and the first motor target torque that hybrid vehicle controller distributes e_pwith the first motor current torque T m_p/ T g_pprogressively realize respective target torque; And
Step S60: hybrid vehicle torque control method terminates.
In above-mentioned steps S20, the current demand signal relevant with the hybrid mode of motor vehicle driven by mixed power comprises accelerator pedal signal, brake pedal signal, the current tach signal of driving engine, driving engine current torque signal, driving engine maximum available torque signal, the minimum maintenance torque signal of driving engine, driving engine current torque restricting signal, Engine Coolant Temperature signal, the current tach signal of first motor, first motor current torque signal, the current available torque signal of first motor, first motor current torque restricting signal, high-tension battery voltage and current signal, high-tension battery can use charge-discharge electric power signal, high-tension battery remaining power signal, vehicle speed signal, wheel slip state signal, key switch status signal, anti-theft state signal, change-speed box current gear and target gear signal and turbine transformer status signal.Those skilled in the art are it is easily understood that 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, the signal relevant with driving engine and the first Motor torque and vehicle needs moment of torsion comprises driving engine current torque signal, driving engine maximum available torque signal, driving engine minimum maintenance torque signal, driving engine current available torque signal, driving engine current torque restricting signal, the first motor current torque signal, the current available torque signal of the first motor and the first motor current torque restricting signal.Those skilled in the art are it is easily understood that the signal relevant with driving engine and the first Motor torque and vehicle needs moment of torsion can also comprise other signals, and this also will drop in protection scope of the present invention.
In above-mentioned steps S40, judge engine demand torque T at hybrid vehicle controller e_reqwith the first motor demand torque T m_req/ T g_reqrespectively not by the current available torque T of driving engine e_uwith the current available torque T of the first motor m_uduring restriction, hybrid vehicle controller is by engine demand torque T e_reqwith the first motor demand torque T m_req/ T g_reqbe defined as engine target torque T respectively e_tarwith the first motor target torque T g_tar/ T m_tar.It should be noted that, engine target torque T e_tarwith the first motor target torque T g_tar/ T m_taralso can be subject to driving engine current torque restricted T e_lwith the first motor current torque restricted T m_l/ T g_lrestriction.
In this article, " vehicle needs moment of torsion is unrestricted " refers to that hybrid vehicle controller judges the current available torque T of driving engine e_u, the current available torque T of the first motor m_u, driving engine current torque restricted T e_lwith the first motor current torque restricted T m_l/ T g_lengine demand torque T can be met respectively e_reqwith the first motor demand torque T m_req/ T g_reqrequest, hybrid vehicle controller is by engine demand torque T e_reqwith the first motor demand torque T m_req/ T g_reqbe defined as engine target torque T respectively e_tarwith the first motor target torque T g_tar/ T m_tarsituation.
In above-mentioned steps S20; the present hybrid pattern of motor vehicle driven by mixed power is the wherein a kind of hybrid mode in auto-stop pattern, automatically originate mode, electric idling mode, idling power generation mode, traditional charge mode, intelligent charge pattern, motor assistant mode, energy feedback pattern, gearshift smooth mode, first start pattern and " shut " mode"; wherein at any time, under motor vehicle driven by mixed power is only in a kind of hybrid mode.
Above-mentioned 11 kinds of hybrid mode are defined as follows:
First start pattern refers to the pattern with key initial start-up driving engine.First start pattern is divided into that 12V actuating motor starts separately, BSG starts separately and 12V actuating motor and BSG combine starting three kinds of modes.Under these three kinds of modes of this pattern, vehicle needs torque T dt_reqthered is provided by 12V actuating motor and/or BSG, its size is for overcoming engine crankshaft stiction required torque.
State when " shut " mode" refers to that major failure appears in vehicle initial condition before first start pattern or vehicle, all mixed dynamic functions (namely BSG quits work, and driving engine works independently) are closed in this mode.In this mode, vehicle needs torque T dt_reqthered is provided by driving engine, its size is calculated by following formula:
T dt_req=P me× (T emax-T emin)+T emin, wherein P mefor chaufeur is to engine torque demand degree, T emaxfor driving engine maximum available torque, T eminfor the minimum maintenance moment of torsion of driving engine.
Tradition charge mode refer to that motor vehicle driven by mixed power is in conventional truck state, BSG as electrical generator only for high-tension battery electricity being maintained predetermined aspiration level and meeting the demand of 12V electric load 14.In this mode, vehicle needs torque T dt_reqthered is provided by driving engine and the first motor, its size is calculated by following formula:
T dt_req=P me× (T emax-T emin)+T emin+ P t× T g_req, wherein P tfor the transmitting ratio between driving engine and BSG, T g_reqit is the first electric power generation demand torque.
Intelligent charge pattern refers to that the Das Gaspedal degree of depth is greater than zero and is less than Das Gaspedal degree of depth predetermined value, hybrid vehicle controller is according to the efficiency of high-tension battery dump energy (SOC) state, the gentle driving engine of engine water, regulate BSG power generation torque, high-tension battery SOC is maintained predetermined aspiration level, makes engine operation in relative high efficient area.In this mode, vehicle needs torque T dt_reqthered is provided by driving engine and the first motor, its size is calculated by following formula:
T dt_req=P me× (T emax-T emin)+T emin+ P t× T g_req, wherein P tfor the transmitting ratio between driving engine and the first motor, T g_reqit is the first electric power generation demand torque.
Motor assistant mode is that the Das Gaspedal degree of depth is greater than Das Gaspedal degree of depth predetermined value and the permission of battery charging and discharging ability, and BSG sends predetermined positive-torque and helps driving engine to accelerate vehicle.In this mode, vehicle needs torque T dt_reqthered is provided by driving engine and the first motor, its size is calculated by following formula:
T dt_req=P me× (T emax-T emin)+T emin+ P mm× T m_u, wherein P mmfor chaufeur is to the first Motor torque desirability.
Energy feedback pattern refers to that vehicle sliding or chaufeur are stepped on brake pedal and made car retardation, if the lock-up clutch locking of turbine transformer, axletree 12a towing astern BSG generates electricity thus a part of inertia energy or braking energy is stored on high-tension battery in the mode of electric energy.In this mode, vehicle needs torque T dt_reqonly provided by BSG motor, the first electric power generation demand torque of its size set by motor vehicle driven by mixed power current gear and the speed of a motor vehicle.
Gearshift smooth mode refers to that the power generation torque removing BSG completes to help gearshift if any gearshift under energy feedback pattern.In this mode, vehicle needs torque T dt_reqbe zero.
Auto-stop pattern refer to chaufeur step on brake pedal stop stop son, engine stoping operation, cancels traditional parking idling, to improve fuel economy.In this mode, vehicle needs torque T dt_reqthered is provided by motor, first motor of its size set by the current rotating speed of driving engine drives demand torque value.
After automatic originate mode refers to that vehicle enters auto-stop pattern, chaufeur loosen the brake or other hardware condition trigger and cause system to exit auto-stop pattern.In this mode, vehicle needs torque T dt_reqthered is provided by the first motor, its size is the first motor driving demand torque T set by the current rotating speed of driving engine m_req.
Electricity idling mode refers to that motor maintains engine idle target, and its effect is that the electric idling after automatically starting ensures that automatically starting the electric idling before the smooth transition or auto-stop of engine idle ensures other state seamlessly transitting to automatic starting state.Electricity idling mode 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 mode and is in the independent idling mode of BSG motor, then vehicle needs torque T dt_reqthered is provided by motor, its size is for maintaining the first electric idling demand torque T needed for engine idle target by driving engine idle1.When motor vehicle driven by mixed power is in electric idling mode and is in driving engine and the common idling mode of motor, then vehicle needs torque T dt_reqthered is provided by driving engine and the first motor, its size is calculated by following formula:
T dt_req=P me× (T emax-T emin)+T emin+ T idle2, wherein T idle2for driving engine being maintained the second electric idling demand torque needed for engine idle target.
Idling power generation mode refers to that hybrid vehicle controller detects that automatic transmission with hydraulic torque converter is in D shelves and driving engine is in idling mode, and BSG generates electricity thus the electricity of high-tension battery maintained preset level substantially and maintains 12V electric load and uses.When motor vehicle driven by mixed power is in idling power generation mode, vehicle needs torque T dt_reqthered is provided by driving engine, its size is calculated by following formula:
T dt_req=P me× (T emax-T emin)+T emin+ P t× T g_req, wherein P tfor the transmitting ratio between driving engine and motor, T g_reqit is the first electric power generation demand torque.
In above-mentioned steps S20; when hybrid vehicle controller 9 detect that key is in closed condition, electric machine controller do not have enable, high-tension battery main switch is closed or driving engine is in flameout state and motor vehicle driven by mixed power not to start or first start or auto-stop pattern or hybrid power function condition of closing meet automatically, then motor vehicle driven by mixed power enters " shut " mode".Wherein hybrid power power function condition of closing refers to: major failure appears in system, and such as torque monitoring reports an error, the fault of motor or battery and High-Voltage Insulation fault etc.
In above-mentioned steps S20, when hybrid vehicle controller 9 detect that key switch is in open mode, engine starting completes and engine stabilizer runs, gear is in other gear beyond D shelves or shift mode be in winter/manual mode under or battery available discharge power to be less than the available discharge power signal of the first preset value or battery invalid; Pressure enters traditional charge mode condition and meets (namely some fault appears in system, and such as battery cell Power unbalance or monomer voltage are too high too low, and battery is overheated); Under electric machine controller enters default power generation mode and hybrid power function close condition do not meet, then motor vehicle driven by mixed power enters traditional charge mode.
In above-mentioned steps S20, when hybrid vehicle controller 9 detects that first start entry condition meets, then motor vehicle driven by mixed power enters first start pattern.
In above-mentioned steps S20, be greater than in Das Gaspedal degree of depth predetermined value, effective, the non-gearshift of accelerator pedal signal when hybrid vehicle controller 9 detects Das Gaspedal aperture, do not step on brake pedal and motor power-assisted can with condition meet, then motor vehicle driven by mixed power enters motor assistant mode.Wherein motor power-assisted can refer to by condition: battery available discharge power is greater than expection battery available discharge power second preset value, battery SOC is greater than battery dump energy first preset value, the SOC of battery and available discharge power signal effectively and electric machine controller is enable and motor vehicle driven by mixed power does not enter and forces traditional charge mode.
In above-mentioned steps S20, when hybrid vehicle controller 9 vehicle idling detected and the general entry condition of electric idling meet and after meeting energy feedback pattern during electric idling entry condition, then motor vehicle driven by mixed power enters electric idling mode.Wherein the general entry condition of electric idling refers to: battery available discharge power, the current available torque of the first motor and battery SOC are greater than corresponding battery available discharge power the 3rd preset value, the first motor current available torque first preset value and battery dump energy second preset value and three signals are effective; 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 vehicle speed signal effective; Driving engine is in oil-break state; The non-locking of TCC.After energy feedback pattern, electric idling entry condition refers to: battery available discharge power is greater than battery available discharge power the 4th preset value, battery SOC is greater than battery dump energy the 3rd preset value, auto-stop entry condition meets and steps on brake pedal.In addition, when hybrid vehicle controller 9 detects any one electric idling exit criteria following, hybrid electric vehicle exits electric idling mode.Wherein electric idling exit criteria refers to: DC-DC power signal is invalid, battery available discharge power is less than battery available discharge power the 5th preset value, the SOC of battery is less than battery dump energy the 4th preset value, shift mode is not in mixed dynamic economic model, driving engine does not have oil-break, accelerator pedal signal is invalid, battery available output invalidating signal, BSG moment of torsion exceedes preset value, BSG torque signal is invalid, battery SOC invalidating signal, first motor is in default power generation mode, gear is not at D shelves and preceding state is not automatic originate mode, electricity time of idle running exceedes preset value, the maximum electric torque of the first motor is less than the maximum electric torque preset value of the first motor, under the state that the speed of a motor vehicle is zero, electric idling exceedes default electric time of idle running and driving engine is not in idling mode (Das Gaspedal is trampled by chaufeur).
In above-mentioned steps S20, be in idling mode when hybrid vehicle controller 9 detects motor vehicle driven by mixed power, meet energy feedback pattern and do not meet when entering the entry condition of other pattern, then motor vehicle driven by mixed power enters energy feedback pattern.
In above-mentioned steps S20, when hybrid vehicle controller 9 detect motor vehicle driven by mixed power be in non-idle and meet enter the condition of other state time, then motor vehicle driven by mixed power enters intelligent charge pattern.
In above-mentioned steps S20, when hybrid vehicle controller 9 detects vehicle idling and do not meet other pattern entry condition, then motor vehicle driven by mixed power enters idling power generation mode.
In above-mentioned steps S20, when hybrid vehicle controller 9 detects that motor vehicle driven by mixed power auto-stop enabled condition meets and auto-stop entry condition meets, then motor vehicle driven by mixed power enters auto-stop pattern.Wherein auto-stop enabled condition is: refer to that Transmission gear is at one grade, change-speed box allows to shut down, engine speed is lower than engine speed second preset value, the current tach signal of driving engine effectively and meet the general entry condition of auto-stop, wherein the general entry condition of auto-stop refers to: change-speed box complementary pump does not have fault, air-conditioning allows to shut down, first electric machine controller is not in default charge mode and 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, vehicle speed signal, ramp signal is effective.Auto-stop entry condition refers to: brake pedal is operated, the speed of a motor vehicle is zero and exceedes Preset Time, Preset Time should be exceeded between twice shutdown exceedes, change-speed box is shut down rear neutral automatically and is controlled not work, the current available torque of first motor is more than the first motor current available torque second preset value, ramp is less than ramp preset value, battery available discharge power exceedes battery available discharge power the 6th preset value, the SOC of battery exceedes battery dump energy the 5th preset value, the general entry condition of auto-stop meets.Wherein the general entry condition of auto-stop refers to: driving engine is not forbidden shutting down, the speed of a motor vehicle needs to exceed the speed of a motor vehicle second preset value after change-speed box is suspended to D shelves at every turn, the speed of a motor vehicle just allows again to shut down need to exceed the speed of a motor vehicle second preset value after shutdown exceedes certain number of times continuously after, driving engine is in idling mode, ABS is inoperative, Engine Coolant Temperature exceedes Engine Coolant Temperature preset value, brake vacuum degree exceedes brake vacuum degree preset value, do not find to collide (having collision signal), front storehouse drowning is opened, DC-DC electric current is lower than DC-DC electric current preset value, floor time according to the electric load estimation of battery SOC and DC-DC is greater than default floor time.
In above-mentioned steps S20, when hybrid vehicle controller 9 detects that motor vehicle driven by mixed power preceding state is energy feedback state, target gear be not equal to actual-gear and target gear higher than third gear time, then motor vehicle driven by mixed power enters gearshift smooth mode.
In above-mentioned steps S20, when hybrid vehicle controller 9 detects that the motor vehicle driven by mixed power auto-stop time exceedes the default maximum auto-stop time, brake pedal is released, Das Gaspedal is operated, the speed of a motor vehicle exceedes preset vehicle speed value, battery available discharge power is less than battery available discharge power the 7th preset value, the SOC of battery after floor time exceedes minimum floor time, be less than battery dump energy the 6th preset value or ambient temperature is less than default ambient temperature or Engine Coolant Temperature is less than default Engine Coolant Temperature or brake vacuum degree is less than default brake vacuum degree, the electric current of DC-DC exceedes default DC-DC current value and motor current available torque when being less than the current available torque of default motor, then motor vehicle driven by mixed power enters automatic originate mode.
Under above-mentioned 11 kinds of patterns, the first electric machine controller needs the current available torque restriction of the first motor considered under generating and drive pattern.Wherein in the drive mode, the current driving torque of the first motor that the first electric machine controller is determined according to motor vehicle driven by mixed power current state limits; The first maximum available motor that electric machine controller calculates according to battery available discharge power and the current revolution counter of the first motor drives demand torque restriction; The electric behavior of the first motor, the rotating speed of the first motor and the function of torsional interaction time; As battery dump energy is too low, limit the first motor in proportion and drive demand torque; As cell pressure is too low, limit the first motor in proportion and drive demand torque; The hardware restriction of belt; Racing of the engine, should limit the first motor driving torque.Electric machine controller is chosen the first minimum motor according to above restriction and is driven demand torque, as the restriction of the current available drive torque of the first motor.Under above-mentioned 11 kinds of patterns, the first electric machine controller needs the current available torque restriction of the first motor considered in generate mode; The first electric power generation torque limited that first electric machine controller determines according to current state; According to the maximum available power generation torque restriction of the first motor that battery can calculate with charge power and current motor revolution counter; The charge characteristic of the first motor, the rotating speed of the first motor and the function of torsional interaction time; As battery dump energy is very high, limit the first electric power generation moment of torsion in proportion; As cell pressure is very high, limit the first electric power generation moment of torsion in proportion; Belt hardware restriction and engine speed too low, the first electric power generation moment of torsion should be limited.First electric machine controller, according to above restriction, chooses the restriction of the first minimum electric power generation moment of torsion as the current available power generation torque of the first motor.
In above-mentioned 11 kinds of patterns, can redirect mutually between some pattern.First start failure vehicle can jump to " shut " mode" from first start pattern; Or find when automatically starting that High-Voltage Insulation is opened, find Vehicular impact or start fail automatically, vehicle can jump to " shut " mode" from automatic originate mode; Or electric idling exit criteria meets, when electric idling determines to exit or vehicle is in that non-idling exceedes Preset Time, engine starting does not complete or engine speed is less than default engine speed, vehicle can jump to " shut " mode" from electric idling mode; Or during auto-stop pattern, find that High-Voltage Insulation is opened, find Vehicular impact, find that front Cang Gai opens, then vehicle can jump to " shut " mode" from auto-stop pattern; Or key switch is closed or driving engine does not turn and system not at startings/auto-stop/automatic starting state or hybrid dynamic system dependent failure or high-tension battery main switch is opened or the first electric machine controller does not have enable, then vehicle can jump to " shut " mode" from other patterns.
When motor vehicle driven by mixed power is in " shut " mode", if hybrid controller 9 detects that key switch closes, vehicle is not in hard closing state, high-tension battery main switch closes, the first electric machine controller is enable, engine starting completes and above condition meets and exceedes certain Preset Time, then motor vehicle driven by mixed power jumps to traditional charge mode from " shut " mode".Or when motor vehicle driven by mixed power is in " shut " mode", if hybrid controller 9 detects that starting entry condition meets, then motor vehicle driven by mixed power jumps to first start pattern from " shut " mode".
When motor vehicle driven by mixed power is in first start pattern, when hybrid controller 9 detects that key switch closes, engine starting completes and above condition meets and have passed through certain Preset Time, then motor vehicle driven by mixed power jumps to traditional charge mode from first start pattern.And when motor vehicle driven by mixed power is in other any state, hybrid controller 9 detects that key switch closes, driving engine completes starting, system is not in starting or closed condition, driving engine is stable, and having the fault causing entering tradition charging, tradition charging entry condition meet or the default charging of the first motor time, motor vehicle driven by mixed power is from other state transitions to traditional charge mode, wherein other state refers to idling power generation mode, intelligent charge pattern, gearshift smooth mode, motor assistant mode, energy feedback pattern, auto-stop pattern, one in automatic originate mode and these eight kinds of patterns of electric idling mode.
When motor vehicle driven by mixed power from traditional mode exit criteria meet and vehicle non-idling time, motor vehicle driven by mixed power can jump to intelligent charge pattern from traditional charge mode.Or when motor vehicle driven by mixed power exit from electric idling mode, the non-idling of vehicle, engine starting complete, engine speed is greater than default engine speed and driving engine is stable time, motor vehicle driven by mixed power can jump to intelligent charge pattern from electric idling mode.Or when motor vehicle driven by mixed power from idling power generation mode exit and vehicle idling time, vehicle jumps to intelligent charge pattern from idling power generation mode.Or when motor vehicle driven by mixed power from motor assistant mode exit criteria meet and vehicle non-idling time, then motor vehicle driven by mixed power jumps to intelligent charge pattern from motor assistant mode.Or when motor vehicle driven by mixed power exit from gearshift smooth mode, the non-idling of vehicle and motor assistant mode entry condition do not meet time, motor vehicle driven by mixed power jumps to intelligent charge pattern from gearshift smooth mode.Or when motor vehicle driven by mixed power from energy feedback pattern exit criteria meet and vehicle non-idling time, motor vehicle driven by mixed power jumps to intelligent charge pattern from energy feedback pattern.Or automatically started, the non-idling of vehicle and engine stabilizer be when running, motor vehicle driven by mixed power jumps to intelligent charge pattern from automatic originate mode.
When motor vehicle driven by mixed power exit from intelligent charge pattern, motor power-assisted entry condition meet and motor power-assisted reenter condition meet, then motor vehicle driven by mixed power jumps to motor assistant mode from intelligent charge pattern.Or when motor vehicle driven by mixed power from gearshift smooth mode exit and motor assistant mode entry condition meets time, motor vehicle driven by mixed power from gearshift smooth mode jump to motor assistant mode.
When motor vehicle driven by mixed power exit from intelligent charge pattern, vehicle idling and energy feedback entry condition meet time, motor vehicle driven by mixed power jumps to energy feedback pattern from intelligent charge pattern.Or when motor vehicle driven by mixed power exit from gearshift smooth mode, vehicle idling, non-shift process and the lock-up clutch locking of turbine transformer time, motor vehicle driven by mixed power jumps to energy feedback pattern from gearshift smooth mode.Or when motor vehicle driven by mixed power from motor assistant mode exit and vehicle idling time, motor vehicle driven by mixed power jumps to energy feedback pattern from motor assistant mode.Or when motor vehicle driven by mixed power exit from idling power generation mode, vehicle idling, energy feedback entry condition meet, auto-stop enabled condition meet and auto-stop entry condition does not meet time, motor vehicle driven by mixed power jumps to energy feedback pattern from idling power generation mode.
When motor vehicle driven by mixed power exit from energy feedback pattern, actual-gear and target gear is inconsistent and target gear is greater than third gear time, motor vehicle driven by mixed power jumps to gearshift smooth mode from energy feedback pattern.
When motor vehicle driven by mixed power exit from electric idling mode or idling power generation mode, auto-stop enabled condition meet and auto-stop entry condition meets time, motor vehicle driven by mixed power jumps to auto-stop pattern from electric idling mode or idling power generation mode.
When motor vehicle driven by mixed power from auto-stop pattern exit and automatically starting conditions meet or auto-stop enabled condition does not meet time, motor vehicle driven by mixed power jumps to automatic originate mode from auto-stop pattern.When motor vehicle driven by mixed power exit from auto-stop pattern, find that High-Voltage Insulation is opened, Vehicular impact or front Cang Gai open, then motor vehicle driven by mixed power jumps to " shut " mode" from auto-stop pattern.
When motor vehicle driven by mixed power exit from automatic originate mode, automatically started condition meet, vehicle idling, the general entry condition of electric idling meet and driving engine is stable time; Or when motor vehicle driven by mixed power from energy feedback pattern exit and engine idle time; Or when motor vehicle driven by mixed power exit from electric idling mode, engine starting completes, engine speed is greater than default engine speed, electric idling determine exit exceed default electric idling post-set time and driving engine is stable time; Or when motor vehicle driven by mixed power exit from intelligent charge pattern, vehicle idling and energy feedback entry condition do not meet time, or when motor vehicle driven by mixed power exits from transmission power generation mode, motor vehicle driven by mixed power is from automatically to start or energy feedback or electric idling mode or intelligent charge pattern or transmission power generation mode jump to idling power generation mode.
When motor vehicle driven by mixed power exits from automatic originate mode, vehicle idling, automatic starting completes and the general entry condition of electric idling meets time, or when motor vehicle driven by mixed power exits from energy feedback pattern, vehicle idling, electricity idling general entry condition meets and after energy feedback pattern, electric idling entry condition meets time, or when motor vehicle driven by mixed power exits from idling power generation mode, vehicle idling, energy feedback entry condition does not meet, driving engine is in oil-break state, TCC is opened, the general entry condition of electricity idling meets, after energy feedback, electric idling entry condition meets, auto-stop enabled condition do not meet and auto-stop entry condition discontented be enough to and preceding state be intelligent charge or energy feedback pattern time, motor vehicle driven by mixed power jumps to electric idling mode from automatic originate mode or energy feedback pattern or idling power generation mode.
According to hybrid vehicle torque control method provided by the invention and use the advantage of motor vehicle driven by mixed power of the method to be: cost is low, and more easily mates with car load.
According to hybrid vehicle torque control method provided by the invention and being also advantageous in that of motor vehicle driven by mixed power using the method: determine driving engine and motor target torque because vehicle needs moment of torsion can combine with the present hybrid pattern of the motor vehicle driven by mixed power in 11 kinds of hybrid mode by the method, this makes the control accuracy of motor vehicle driven by mixed power better, thus improves fuel economy better and decrease discharge.

Claims (29)

1. a hybrid vehicle torque control method, wherein motor vehicle driven by mixed power comprises driving engine, first motor, the high-tension battery be coupled with the first motor, change-speed box and for driving engine, first motor, change-speed box and high-tension battery carry out the control unit of monitoring and controlling, driving engine is connected with the first motor by connecting device, the power of driving engine and/or the first motor is sent to wheel by change-speed box and diff, control unit comprises the hybrid vehicle controller for realizing described torque control method and is coupled with hybrid vehicle controller and the engine controller communicated and the first electric machine controller, it is characterized in that, said method comprising the steps of:
Step 1: hybrid vehicle controller judges the present hybrid pattern 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 the signal determination driving engine current torque T relevant with driving engine and the first Motor torque and 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 the 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, wherein vehicle needs torque T dt_reqcomprise engine demand torque T e_reqwith the first motor demand torque T m_req/ T g_req, wherein the first motor demand torque is that the first motor drives demand torque T m_reqor the first electric power generation demand torque T g_req;
Step 3: hybrid vehicle controller is based on the present hybrid pattern of motor vehicle driven by mixed power and vehicle needs torque T dt_reqand the current available torque T of binding engine e_uand the current available torque T of the first motor m_udetermine engine target torque T e_tarand the first motor target torque T g_tar/ T m_tar, and driving engine and the first motor target torque are separately subject to driving engine current torque restricted T e_lwith the first motor current torque restricted T m_l/ T g_lrestriction, in step 3, when hybrid vehicle controller judges engine demand torque T e_reqwith the first motor demand torque T m_req/ T g_reqrespectively not by the current available torque T of driving engine e_uwith the current available torque T of the first motor m_urestriction time, hybrid vehicle controller is by engine demand torque T e_reqwith the first motor demand torque T m_req/ T g_reqbe defined as engine target torque T respectively e_tarwith the first motor target torque T g_tar/ T m_tar; And
Step 4: engine controller and the first electric machine controller control driving engine and the first motor respectively based on driving engine current torque T after receiving the driving engine and the first motor target torque that hybrid vehicle controller distributes e_pwith the first motor current torque T m_p/ T g_pprogressively realize respective target torque.
2. method according to claim 1, it is characterized in that, control unit also comprises gearbox controller, battery controller, braking anti-locking controller and car body controller, and hybrid vehicle controller to be coupled with these controllers by Car Area Network bus and to communicate.
3. method according to claim 1 and 2, is characterized in that, change-speed box is automatic transmission with hydraulic torque converter, and it is connected with driving engine by 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 accelerator pedal signal, brake pedal signal, the current tach signal of driving engine, driving engine current torque signal, driving engine maximum available torque signal, the minimum maintenance torque signal of driving engine, the current available torque signal of driving engine, driving engine current torque restricting signal, Engine Coolant Temperature signal, the current tach signal of first motor, first motor current torque signal, the current available torque signal of first motor, first motor current torque restricting signal, high-tension battery voltage and current signal, high-tension battery can use charge-discharge electric power signal, high-tension battery remaining power signal, vehicle speed signal, wheel slip state signal, key switch status signal, anti-theft state signal, change-speed box current gear and target gear signal and turbine transformer status signal.
5. method according to claim 1, it is characterized in that, the signal relevant with driving engine and the first Motor torque and vehicle needs moment of torsion comprises driving engine current torque signal, driving engine maximum available torque signal, driving engine minimum maintenance torque signal, driving engine current torque restricting signal, the first motor current torque signal, the current available torque signal of the first motor and the first motor current torque restricting signal.
6. the method according to claim 1 or 4; it is characterized in that; the present hybrid pattern of the motor vehicle driven by mixed power described in step 1 is the wherein a kind of hybrid mode in auto-stop pattern, automatically originate mode, electric idling mode, idling power generation mode, traditional charge mode, intelligent charge pattern, motor assistant mode, energy feedback pattern, gearshift smooth mode, first start pattern and " shut " mode"; wherein at any time, under motor vehicle driven by mixed power is only in a kind of described hybrid mode.
7. method according to claim 6, is characterized in that, when motor vehicle driven by mixed power is in first start pattern, and vehicle needs torque T dt_reqthered is provided by actuating motor and/or the 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 vehicle needs torque T dt_reqthered is provided by driving engine, its size is calculated by following formula:
, wherein, for chaufeur is to engine torque demand degree, for driving engine maximum available torque, for the minimum maintenance moment of torsion of driving engine.
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 vehicle needs torque T dt_reqthered is provided by driving engine and the first motor, its size is calculated by following formula:
, wherein for the transmitting ratio between driving engine and the first motor, it 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 auto-stop pattern, and vehicle needs torque T dt_reqthered is provided by the first motor, its size is the first motor driving demand torque set by the current rotating speed of driving engine .
11. methods according to claim 6, is characterized in that, when motor vehicle driven by mixed power is in automatic originate mode, and vehicle needs torque T dt_reqthered is provided by the first motor, its size is the first motor driving demand torque set by the current rotating speed of driving engine .
12. methods according to claim 6, is characterized in that, when motor vehicle driven by mixed power is in motor assistant mode, and vehicle needs torque T dt_reqthered is provided by driving engine and the first motor, its size is calculated by following formula:
, wherein for chaufeur is to Motor torque desirability.
13. methods according to claim 6, is characterized in that, when motor vehicle driven by mixed power is in energy feedback pattern, and vehicle needs torque T dt_reqthered is provided by the first motor, its size is the first electric power generation demand torque set by motor vehicle driven by mixed power current gear and the speed of a motor vehicle .
14. methods according to claim 6, is characterized in that, when motor vehicle driven by mixed power is in gearshift smooth mode, and vehicle needs torque T dt_reqbe zero.
15. methods according to claim 6, is characterized in that, be in electric idling mode and be in the independent idling mode of the first motor, then vehicle needs torque T when motor vehicle driven by mixed power dt_reqthered is provided by the first motor, its size is for maintaining the first electric idling demand torque T needed for engine idle target by driving engine idle1.
16. methods according to claim 6, is characterized in that, be in electric idling mode and be in driving engine and the common idling mode of the first motor, then vehicle needs torque T when motor vehicle driven by mixed power dt_reqthered is provided by driving engine and the first motor, its size is calculated by following formula:
, wherein for driving engine being maintained the second electric idling demand torque needed for engine idle target.
17. methods 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. methods according to claim 6, is characterized in that, motor vehicle driven by mixed power can jump to first start pattern or traditional charge mode from " shut " mode", and can jump to " shut " mode" from other ten kinds of patterns.
19. methods according to claim 6, is characterized in that, motor vehicle driven by mixed power can also jump to traditional charge mode or " shut " mode" from first start pattern, and can jump to first start pattern from " shut " mode".
20. methods 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 charge mode, and can jump to traditional charge mode from other ten kinds of patterns.
21. methods according to claim 6; it is characterized in that; motor vehicle driven by mixed power can jump to intelligent charge pattern or electric idling mode or auto-stop pattern or energy feedback pattern or traditional charge mode or " shut " mode" from idling power generation mode, and can jump to idling power generation mode from automatic originate mode or energy feedback pattern or intelligent charge pattern or electric idling mode or transmission power generation mode.
22. methods 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 charge mode or " shut " mode" from intelligent charge pattern; And can from energy feedback pattern or gearshift smooth mode or motor assistant mode or electric idling mode or traditional charge mode or originate mode or idling power generation mode jump to intelligent charge pattern automatically.
23. methods 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 charge mode or " shut " mode" from gearshift smooth mode; And gearshift smooth mode can be jumped to from energy feedback pattern.
24. methods 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 charge mode or " shut " mode" from motor assistant mode, and can jump to motor assistant mode from gearshift smooth mode or intelligent charge pattern.
25. methods according to claim 6, it is characterized in that, motor vehicle driven by mixed power can jump to electric idling mode or idling power generation mode or intelligent charge pattern or gearshift smooth mode or traditional charge mode or " shut " mode" from energy feedback pattern; And energy feedback pattern can be jumped to from idling power generation mode or intelligent charge pattern or gearshift smooth mode or motor assistant mode.
26. methods according to claim 6; it is characterized in that; motor vehicle driven by mixed power can jump to automatic originate mode or traditional charge mode or " shut " mode" from auto-stop pattern, and can jump to auto-stop pattern from electric idling mode or idling power generation mode.
27. methods according to claim 6; it is characterized in that; motor vehicle driven by mixed power can jump to " shut " mode" or electric idling mode or idling power generation mode or intelligent charge pattern or traditional charge mode from automatic originate mode, and can jump to automatic originate mode from auto-stop pattern.
28. methods 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 charge mode or " shut " mode" from electric idling mode, and can from idling power generation mode or originate mode or energy feedback pattern jump to electric idling mode automatically.
29. methods according to claim 1, is characterized in that, connecting device is selected from the one in belt, chain, steel band, transmission shaft.
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