CN109515429A - A kind of control method of the gas-electricity power combined system of commercial vehicle tandem - Google Patents

A kind of control method of the gas-electricity power combined system of commercial vehicle tandem Download PDF

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CN109515429A
CN109515429A CN201811541312.8A CN201811541312A CN109515429A CN 109515429 A CN109515429 A CN 109515429A CN 201811541312 A CN201811541312 A CN 201811541312A CN 109515429 A CN109515429 A CN 109515429A
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vehicle
max
motor
com
soc
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CN109515429B (en
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史强
张蕾
黄森
李静
李司光
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Shaanxi Automobile Group Co Ltd
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Shaanxi Automobile Group Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K25/00—Auxiliary drives
    • B60K25/10—Auxiliary drives directly from oscillating movements due to vehicle running motion, e.g. suspension movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K25/00—Auxiliary drives
    • B60K25/10—Auxiliary drives directly from oscillating movements due to vehicle running motion, e.g. suspension movement
    • B60K2025/106—Auxiliary drives directly from oscillating movements due to vehicle running motion, e.g. suspension movement by fluid means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/24—Energy storage means
    • B60W2510/242—Energy storage means for electrical energy
    • B60W2510/244—Charge state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/10—Longitudinal speed

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

Abstract

The present invention provides a kind of control method of gas-electricity power combined system of commercial vehicle tandem, based on the gas-electricity power combined system of tandem, according to the instruction of the traction power of driver, from each component, the feedback of driving system and preset control strategy, vehicle control device is according to control method in pure electric drive, pure gas drive is dynamic, combination drive, driving charge mode, stopping for charging mode, regenerative braking, specific operating mode is selected in seven kinds of modes of mixed charged mode, to make full use of unserviceable energy in conventional truck, improve the capacity usage ratio of vehicle, promote vehicle continual mileage.

Description

A kind of control method of the gas-electricity power combined system of commercial vehicle tandem
Technical field
The invention belongs to new-energy automobile design fields, are related to a kind of control of gas-electricity power combined system of commercial vehicle tandem Method processed.
Background technique
The gas-electricity power combined system of tandem can extend vehicle continual mileage, and the continuation of the journey alleviated to new energy vehicle is burnt Consider.Since series connection type hybrid power system has multiple-working mode, according to different drive demand and vehicle-state, selection is most Good operating mode could promote the continual mileage of vehicle to the greatest extent.The operational mode and control method of power drive system are close Cut phase is closed, and vehicle control device receives the operating instruction from driver, and the feedback from each component and driving system, according to pre- The control method set applies the specific operating mode to make a policy.The performance of drive system depends primarily on the quality of control, Wherein control method plays conclusive effect.
Summary of the invention
The present invention provides a kind of control method of gas-electricity power combined system of commercial vehicle tandem, mixed based on tandem pneumoelectric Dynamical system is closed, according to the instruction of the traction power of driver, the feedback from each component, driving system and preset control strategy, Vehicle control device according to control method in pure electric drive, pure gas drive is dynamic, combination drive, driving charge mode, stopping for charging mode, Specific operating mode is selected in seven kinds of modes such as regenerative braking, mixed charged mode, it can not in conventional truck to make full use of The energy utilized improves the capacity usage ratio of vehicle, promotes vehicle continual mileage.
To achieve the above object, the present invention is realized by following technical proposal:
A kind of control method of the gas-electricity power combined system of commercial vehicle tandem, which is characterized in that the system comprises according to Secondary connection and power battery, electric coupling device, motor controller, motor, transmission device and the wheel for forming energy transmission channel Tire；The system also includes inflator pump, compressed gas cylinder, gas driven generator and entire car controller, the inflator pump utilizes vehicle Vibration and impact driving itself work, inflate with vehicle to compressed gas cylinder, and the gas driven generator is using in compressed gas cylinder Air pressure drives and itself works, and exports electric energy to the electric coupling device；The described method includes:
The atmospheric pressure value and vehicle-state of entire car controller real-time monitoring compressed gas cylinder, and according to the atmospheric pressure value of compressed gas cylinder And vehicle-state controls the working condition of gas driven generator and the operating mode of vehicle, including monitoring compressed gas cylinder Atmospheric pressure value, monitoring speed, calculate vehicle demand power, calculate motor maximum power generation, according to monitoring and calculate Above-mentioned value determine the operating mode of vehicle.
Preferably, comprising the following steps:
S1: judge the atmospheric pressure value P of compressed gas cylinderGas cylinderWhether the minimum threshold of driving gas driven generator output power is greater than PminIf being judged as YES, S6 is thened follow the steps；If being judged as NO, step S2 is executed；
S2: judging vehicle running state according to speed, if vehicle velocity V > 0, thens follow the steps S3, if vehicle velocity V=0, and vehicle Into car-parking model, gas driven generator and motor are in OFF state；
S3: vehicle demand power P is calculatedcomIf Pcom> 0, vehicle are in driving condition, then vehicle enters pure electric drive mould Formula, gas driven generator are in OFF state, and motor works in electric motor state, and output power PM=Pcom；If Pcom< 0, vehicle In on-position, S4 is thened follow the steps；
S4: battery charge state SOC judgement, if battery SOC > SOCmax, then enter mechanical braking mode, by mechanical braking System provides energy required for vehicle braking completely, and gas driven generator and motor are in OFF state；If battery SOC≤ SOCmax, then follow the steps S5, above-mentioned SOCmaxFor battery charge cutoff SOC；
S5: the maximum power generation being capable of providing when motor is in generator working condition is obtained according to motor characteristic MAP PGenerate electricity maxIf Pcom<PGenerate electricity max, then vehicle enters braking mode, and gas driven generator is in OFF state, and motor work is generating electricity Machine state, and output power PM=PGenerate electricity max；If Pcom≥PGenerate electricity max, then vehicle enters braking mode, and gas driven generator is in OFF state, motor work in Generator Status, and output power PM=Pcom；
S6: judging vehicle running state according to speed, if vehicle velocity V > 0, thens follow the steps S8, if vehicle velocity V=0, and vehicle Into car-parking model, step S7 is executed；
S7: battery charge state SOC judgement, if battery SOC > SOCmax, then vehicle enters car-parking model, gas driven generator OFF state is in motor；If battery SOC≤SOCmax, then vehicle enters stopping for charging mode, and gas driven generator work is given Power battery is charged with maximum power, until SOC > SOCmaxOr PGas cylinder<Pmin, gas driven generator output power P at this timePneumatically= PPneumatic max；Motor is in OFF state；
S8: vehicle demand power P is calculatedcomIf Pcom< 0, vehicle is in on-position, thens follow the steps S9；If Pcom> 0, Vehicle is in driving condition, thens follow the steps S11.
S9: battery charge state SOC judgement, if battery SOC > SOCmax, vehicle enters mechanical braking mode, Pneumatic electric generating Machine and motor do not work, and are in OFF state；If battery SOC≤SOCmax, then follow the steps S10.
S10: the maximum power generation being capable of providing when motor is in generator working condition is obtained according to motor characteristic MAP PGenerate electricity maxIf Pcom<PGenerate electricity max, then vehicle enters mixed charged mode, gas driven generator work, and PPneumatically=PPneumatic max, motor work In Generator Status, and output power PM=PGenerate electricity max；If Pcom≥PGenerate electricity max, then enter mixed charged mode, gas driven generator work Make, and PPneumatically=PPneumatic max, motor work is in Generator Status, and output power PM=Pcom；
S11: if vehicle demand power Pcom>PPneumatic max·η1, then vehicle enters combination drive mode, gas driven generator and electricity Machine all works, and gas driven generator output power PPneumatically=PPneumatic max, output power of motor PM=Pcom；If Pcom≤PPneumatic max·η1, S12 is thened follow the steps, wherein η1For the working efficiency of motor and electric coupler；
S12: battery charge state SOC judgement, if battery SOC > SOCmax, then enter pure gas drive mode, Pneumatic electric generating Machine is in running order, output power PPneumatically=Pcom/η1, motor is in electric motor operation state, output power PM=Pcom；If electric Pond SOC≤SOCmax, then enter driving charge mode, air motor is in running order, output power PPneumatically=PPneumatic max, electricity Machine is in electric motor operation state, output power PM=Pcom。
Preferably, vehicle demand power P is calculated according to following formulacom:
In formula: Pcom- vehicle demand power, kW；V-speed, km/h；η-transmission system efficiency；M-complete vehicle quality, kg；G-acceleration of gravity, m/s2；F-coefficient of rolling resistance；α-the angle of gradient, °；ρ-atmospheric density, kg/m3；CdThe resistance of-air Force coefficient；A-vehicle front face area, m2；δ-rotational inertia coefficient；Dv/dt-vehicle acceleration, m/s2。
Compared with the prior art, the present invention has the following advantages:
1. the present invention can utmostly keep the state-of-charge of power battery under the premise of meeting vehicle drive demand, Guarantee the accelerating ability and grade climbing performance of vehicle；
2. the vibrational energy that gas energy according to the present invention generates in vehicle travel process, impact energy, External energy supply, save the cost are not needed.
Detailed description of the invention
Fig. 1 is the gas-electricity power combined system structure diagram of commercial vehicle tandem.
Fig. 2 is the gas-electricity power combined system control method flow chart of commercial vehicle tandem.
Specific embodiment
The present invention discloses a kind of control method of gas-electricity power combined system of commercial vehicle tandem, and wherein tandem mixing is dynamic Force system mainly by power battery, electric coupling device, motor controller, motor, transmission device, tire, be installed on driving The inflator pump of room suspension, the inflator pump for being installed on chassis suspension, compressed gas cylinder, entire car controller, gas driven generator composition, are shown in figure 1.The power battery, electric coupling device, motor controller, motor, transmission device, tire form energy transmission channel, Transmission device includes gearbox, transmission shaft and rear driving axle.Inflator pump itself is worked using the vibration and impact driving of vehicle, is right Compressed gas cylinder progress is inflated with vehicle, and the gas driven generator is driven using the air pressure in compressed gas cylinder and itself worked, and to described Electric coupling device exports electric energy.The system can recycle the vibration of suspension system and impact energy, and energy storage is in compressed gas cylinder In, it completes from gas replenishment process, then energy is discharged to dynamical system by gas driven generator again and drives vehicle driving, sufficiently benefit With energy unserviceable in conventional truck, the capacity usage ratio of vehicle is improved, promotes vehicle continual mileage.The hybrid power passes Dynamic system may be implemented vehicle in pure electric drive, pure gas drive is dynamic, combination drive, driving charge mode, stopping for charging mode, regeneration Seven kinds of braking mode, mixed charged mode mode work.
Following will be combined with the drawings in the embodiments of the present invention, is further retouched to the control method in the embodiment of the present invention It states.
The present invention provides a kind of control method of gas-electricity power combined system of commercial vehicle tandem, real-time by entire car controller The atmospheric pressure value and vehicle-state of compressed gas cylinder are monitored, and is controlled pneumatically according to the atmospheric pressure value of compressed gas cylinder and vehicle-state The working condition of generator and the operating mode of vehicle, atmospheric pressure value, monitoring speed, calculating including monitoring compressed gas cylinder Vehicle demand power, the maximum power generation for calculating motor, the work for determining according to the above-mentioned value for monitoring and calculating vehicle Mode.Specifically includes the following steps:
S1: judge the atmospheric pressure value P of compressed gas cylinderGas cylinderWhether the minimum threshold of driving gas driven generator output power is greater than PminIf being judged as YES, S6 is thened follow the steps；If being judged as NO, step S2 is executed；
S2: judging vehicle running state according to speed, if vehicle velocity V > 0, thens follow the steps S3, if vehicle velocity V=0, and vehicle Into car-parking model, gas driven generator and motor are in OFF state；
S3: vehicle demand power P is calculatedcomIf Pcom> 0, vehicle are in driving condition, then vehicle enters pure electric drive mould Formula, gas driven generator are in OFF state, and motor works in electric motor state, and output power PM=Pcom；If Pcom< 0, vehicle In on-position, S4 is thened follow the steps；
S4: battery charge state SOC judgement, if battery SOC > SOCmax, then enter mechanical braking mode, by mechanical braking System provides energy required for vehicle braking completely, and gas driven generator and motor are in OFF state；If battery SOC≤ SOCmax, then follow the steps S5, above-mentioned SOCmaxFor battery charge cutoff SOC；
S5: the maximum power generation being capable of providing when motor is in generator working condition is obtained according to motor characteristic MAP PGenerate electricity maxIf Pcom<PGenerate electricity max, then vehicle enters braking mode, and gas driven generator is in OFF state, and motor work is generating electricity Machine state, and output power PM=PGenerate electricity max；If Pcom≥PGenerate electricity max, then vehicle enters braking mode, and gas driven generator is in OFF state, motor work in Generator Status, and output power PM=Pcom；
S6: judging vehicle running state according to speed, if vehicle velocity V > 0, thens follow the steps S8, if vehicle velocity V=0, and vehicle Into car-parking model, step S7 is executed；
S7: battery charge state SOC judgement, if battery SOC > SOCmax, then vehicle enters car-parking model, gas driven generator OFF state is in motor；If battery SOC≤SOCmax, then vehicle enters stopping for charging mode, and gas driven generator work is given Power battery is charged with maximum power, until SOC > SOCmaxOr PGas cylinder<Pmin, gas driven generator output power P at this timePneumatically= PPneumatic max；Motor is in OFF state；
S8: vehicle demand power P is calculatedcomIf Pcom< 0, vehicle is in on-position, thens follow the steps S9；If Pcom> 0, Vehicle is in driving condition, thens follow the steps S11.
S9: battery charge state SOC judgement, if battery SOC > SOCmax, vehicle enters mechanical braking mode, Pneumatic electric generating Machine and motor do not work, and are in OFF state；If battery SOC≤SOCmax, then follow the steps S10.
S10: the maximum power generation being capable of providing when motor is in generator working condition is obtained according to motor characteristic MAP PGenerate electricity maxIf Pcom<PGenerate electricity max, then vehicle enters mixed charged mode, gas driven generator work, and PPneumatically=PPneumatic max, motor work In Generator Status, and output power PM=PGenerate electricity max；If Pcom≥PGenerate electricity max, then enter mixed charged mode, gas driven generator work Make, and PPneumatically=PPneumatic max, motor work is in Generator Status, and output power PM=Pcom；
S11: if vehicle demand power Pcom>PPneumatic max·η1, then vehicle enters combination drive mode, gas driven generator and electricity Machine all works, and gas driven generator output power PPneumatically=PPneumatic max, output power of motor PM=Pcom；If Pcom≤PPneumatic max·η1, S12 is thened follow the steps, wherein η1For the working efficiency of motor and electric coupler；
S12: battery charge state SOC judgement, if battery SOC > SOCmax, then enter pure gas drive mode, Pneumatic electric generating Machine is in running order, output power PPneumatically=Pcom/η1, motor is in electric motor operation state, output power PM=Pcom；If electric Pond SOC≤SOCmax, then enter driving charge mode, air motor is in running order, output power PPneumatically=PPneumatic max, electricity Machine is in electric motor operation state, output power PM=Pcom。
Wherein, vehicle demand power P is calculated according to following formulacom:
In formula: Pcom- vehicle demand power, kW；V-speed, km/h；η-transmission system efficiency；M-complete vehicle quality, kg；G-acceleration of gravity, m/s2；F-coefficient of rolling resistance；α-the angle of gradient, °；ρ-atmospheric density, kg/m3；CdThe resistance of-air Force coefficient；A-vehicle front face area, m2；δ-rotational inertia coefficient；Dv/dt-vehicle adds and (subtracts) speed, m/s2, in deceleration It is negative value when state.
Finally it should be noted that: the above embodiment illustrates only a kind of technical solution of this case, although herein by This programme is described in detail in attached drawing etc., but it should be understood by those ordinary skilled in the art that: passes through one to this case A little specific embodiments are modified or are equivalently replaced to its some technical characteristics, without departing from the design of the technical program Thinking, resulting similar scheme still belong to this case and are claimed in range.

Claims (3)

1. a kind of control method of the gas-electricity power combined system of commercial vehicle tandem, which is characterized in that the system comprises successively Connect and formed power battery, electric coupling device, motor controller, motor, transmission device and the tire in energy transmission channel； The system also includes inflator pump, compressed gas cylinder, gas driven generator and entire car controller, the inflator pump utilizes the vibration of vehicle It itself works with impact driving, compressed gas cylinder inflate with vehicle, the gas driven generator utilizes the air pressure in compressed gas cylinder It drives and itself works, and export electric energy to the electric coupling device；The described method includes:
The atmospheric pressure value and vehicle-state of entire car controller real-time monitoring compressed gas cylinder, and according to the atmospheric pressure value of compressed gas cylinder and Vehicle-state controls the working condition of gas driven generator and the operating mode of vehicle, including the gas of monitoring compressed gas cylinder Pressure value, the maximum power generation, upper according to what is monitored and calculate for monitoring speed, calculating vehicle demand power, calculating motor State the operating mode that value determines vehicle.
2. a kind of control method of gas-electricity power combined system of commercial vehicle tandem according to claim 1, feature exist In, comprising the following steps:
S1: judge the atmospheric pressure value P of compressed gas cylinderGas cylinderWhether the minimum threshold P of driving gas driven generator output power is greater thanminIf It is judged as YES, thens follow the steps S6；If being judged as NO, step S2 is executed；
S2: judging vehicle running state according to speed, if vehicle velocity V > 0, thens follow the steps S3, if vehicle velocity V=0, vehicle enters Car-parking model, gas driven generator and motor are in OFF state；
S3: vehicle demand power P is calculatedcomIf Pcom> 0, vehicle are in driving condition, then vehicle enters pure electric drive mode, Gas driven generator is in OFF state, and motor works in electric motor state, and output power PM=Pcom；If Pcom< 0, at vehicle In on-position, S4 is thened follow the steps；
S4: battery charge state SOC judgement, if battery SOC > SOCmax, then enter mechanical braking mode, by mechanical braking system Energy required for vehicle braking is provided completely, and gas driven generator and motor are in OFF state；If battery SOC≤SOCmax, Then follow the steps S5, above-mentioned SOCmaxFor battery charge cutoff SOC；
S5: the maximum power generation being capable of providing when motor is in generator working condition is obtained according to motor characteristic MAP PGenerate electricity maxIf Pcom<PGenerate electricity max, then vehicle enters braking mode, and gas driven generator is in OFF state, and motor work is generating electricity Machine state, and output power PM=PGenerate electricity max；If Pcom≥PGenerate electricity max, then vehicle enters braking mode, and gas driven generator is in OFF state, motor work in Generator Status, and output power PM=Pcom；
S6: judging vehicle running state according to speed, if vehicle velocity V > 0, thens follow the steps S8, if vehicle velocity V=0, vehicle enters Car-parking model executes step S7；
S7: battery charge state SOC judgement, if battery SOC > SOCmax, then vehicle enters car-parking model, gas driven generator and electricity Machine is in OFF state；If battery SOC≤SOCmax, then vehicle enters stopping for charging mode, and power is given in gas driven generator work Battery is charged with maximum power, until SOC > SOCmaxOr PGas cylinder<Pmin, gas driven generator output power P at this timePneumatically= PPneumatic max；Motor is in OFF state；
S8: vehicle demand power P is calculatedcomIf Pcom< 0, vehicle is in on-position, thens follow the steps S9；If Pcom> 0, vehicle In driving condition, S11 is thened follow the steps.
S9: battery charge state SOC judgement, if battery SOC > SOCmax, vehicle enters mechanical braking mode, gas driven generator and Motor does not work, and is in OFF state；If battery SOC≤SOCmax, then follow the steps S10.
S10: the maximum power generation being capable of providing when motor is in generator working condition is obtained according to motor characteristic MAP PGenerate electricity maxIf Pcom<PGenerate electricity max, then vehicle enters mixed charged mode, gas driven generator work, and PPneumatically=PPneumatic max, motor work In Generator Status, and output power PM=PGenerate electricity max；If Pcom≥PGenerate electricity max, then enter mixed charged mode, gas driven generator work Make, and PPneumatically=PPneumatic max, motor work is in Generator Status, and output power PM=Pcom；
S11: if vehicle demand power Pcom>PPneumatic max·η1, then vehicle enters combination drive mode, and gas driven generator and motor are all Work, and gas driven generator output power PPneumatically=PPneumatic max, output power of motor PM=Pcom；If Pcom≤PPneumatic max·η1, then hold Row step S12, wherein η1For the working efficiency of motor and electric coupler；
S12: battery charge state SOC judgement, if battery SOC > SOCmax, then enter pure gas drive mode, at gas driven generator In working condition, output power PPneumatically=Pcom/η1, motor is in electric motor operation state, output power PM=Pcom；If battery SOC≤SOCmax, then enter driving charge mode, air motor is in running order, output power PPneumatically=PPneumatic max, motor In electric motor operation state, output power PM=Pcom。
3. a kind of control method of gas-electricity power combined system of commercial vehicle tandem according to claim 2, feature exist According to following formula calculating vehicle demand power Pcom:
In formula: Pcom- vehicle demand power, kW；V-speed, km/h；η-transmission system efficiency；M-complete vehicle quality, kg；g— Acceleration of gravity, m/s2；F-coefficient of rolling resistance；α-the angle of gradient, °；ρ-atmospheric density, kg/m3；Cd- air drag system Number；A-vehicle front face area, m2；δ-rotational inertia coefficient；Dv/dt-vehicle acceleration, m/s2。
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