CVT (continuously variable transmission) hybrid electric vehicle power source torque optimizing distribution method

A hybrid vehicle, a technology for optimizing distribution, applied in hybrid vehicles, motor vehicles, transportation and packaging, etc., can solve the problem that acceleration is difficult to intuitively reflect the driver's intention and feeling, and ignore the impact of the energy utilization rate of the hybrid system. , to achieve the effect of improving the working efficiency of the whole vehicle and optimizing the efficiency.

Inactive Publication Date: 2012-07-18
TSINGHUA UNIV +1
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Problems solved by technology

[0003] Aiming at the optimal distribution of energy in CVT hybrid electric vehicles, most of the current research focuses on the engine working in the high-efficiency zone as the control target, ignoring the influence of the efficiency of the motor, battery and transmission system on the energy util

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  • CVT (continuously variable transmission) hybrid electric vehicle power source torque optimizing distribution method
  • CVT (continuously variable transmission) hybrid electric vehicle power source torque optimizing distribution method
  • CVT (continuously variable transmission) hybrid electric vehicle power source torque optimizing distribution method

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[0013] The present invention will be described in detail below with reference to the drawings and embodiments.

[0014] Such as figure 1 As shown, the CVT (Continuously Variable Automatic Transmission) hybrid vehicle system of the present invention includes a driver operating platform 1, a CVT hybrid vehicle control system 2, an engine controller (ECU) 3, a motor controller (IPU) 4, Continuously variable automatic transmission controller (TCU) 5, final drive 6 and battery 7.

[0015] The driver operating platform 1 is provided with an accelerator pedal position sensor 11 and a brake pedal position sensor 12. The accelerator pedal position sensor 11 sends the collected accelerator pedal opening value APS to the CVT hybrid vehicle control system 2; The pedal position sensor 12 also sends the collected brake pedal opening value BPS to the vehicle control system 2 of the CVT hybrid electric vehicle. The CVT hybrid vehicle control system 2 performs optimization processing based on the...

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Abstract

The invention discloses a CVT (continuously variable transmission) hybrid electric vehicle power source torque optimizing distribution method which comprises the steps of (1) building a whole vehicle transmission system dynamics equation which is related to an accelerator pedal opening value by taking the accelerator pedal opening value, accelerator pedal speed and power supply SOC (state of charge) as optimizing state variables and taking a required torque value as basic; (2) taking engine power as required input power of a whole vehicle, and setting power consumed for overcoming traveling resistance of the vehicle and storage battery power as output power of a system, and combining the whole vehicle transmission system dynamics equation in step (1) so as to obtain final required output power of the system; and (3) defining system efficiency according to the ratio of the required output power and the required input power, taking the highest system efficiency as an optimizing target, and optimizing to obtain power source target torque. The method of the invention can improve the whole vehicle working efficiency, solves a torque distribution problem at a driving working state, and can be widely applied to the field of hybrid electric vehicles.

Description

technical field [0001] The invention relates to the field of hybrid electric vehicles, in particular to a method for optimally distributing power source torque under driving conditions of a CVT (continuously variable automatic transmission) hybrid electric vehicle. Background technique [0002] Under the driving conditions of hybrid electric vehicles, formulating a reasonable energy management strategy can improve the working characteristics of the whole vehicle, and then improve its fuel economy. For hybrid vehicles equipped with CVT (continuously variable automatic transmission), the CVT speed ratio can be continuously changed within a certain range, so the power source torque distribution and the vehicle's working characteristics can be better realized through comprehensive control of the engine, motor and CVT optimization. [0003] Aiming at the problem of optimal energy distribution of CVT hybrid electric vehicles, most of the current studies focus on the engine workin...

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Application Information

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IPC IPC(8): B60W20/00B60W10/06B60W10/08B60W10/101B60W20/10
CPCY02T10/6286Y02T10/62
Inventor 罗禹贡赵峰郑永霞李克强连小珉苏岭李宗华严钦山洪木南
Owner TSINGHUA UNIV
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