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Method for recovering brake energy of hybrid electric vehicle

A technology of braking energy recovery and hybrid electric vehicles, which is applied in the direction of electric vehicles, electric braking systems, vehicle components, etc., and can solve the problems that the recovery efficiency cannot be guaranteed.

Active Publication Date: 2013-01-16
VIRIDI E MOBILITY TECH NINGBO CO LTD +1
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  • Description
  • Claims
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Problems solved by technology

However, in actual situations, the vehicle speed information, braking demand and recoverable braking energy are not necessarily related, and this patent only uses the vehicle speed information as the criterion for judging whether to perform braking energy recovery, and the recovery efficiency cannot be determined. to guarantee

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  • Method for recovering brake energy of hybrid electric vehicle
  • Method for recovering brake energy of hybrid electric vehicle

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Embodiment Construction

[0022] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0023] Such as figure 1 As shown, in the braking energy recovery system, the vehicle controller calculates the magnitude of the motor braking force and friction braking force on the front drive wheels according to the driver's braking demand. The magnitude of the braking force on the front and rear wheels, which determines the ratio of the braking force between the front and rear wheels and the ratio between the braking force of the motor and the frictional braking force. In the case of braking, the maximum output torque of the motor is a function of its speed. In the braking energy recovery system, traditional hydraulic braking cooperates with the braking torque of the motor to complete the entire braking process. In or...

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Abstract

The invention provides a method for recovering brake energy of a hybrid electric vehicle, belongs to the technical field of hybrid electric vehicles, and solves the problem that the recovery efficiency of the conventional energy recovery system cannot be guaranteed. The method for recovering the brake energy of the hybrid electric vehicle comprises the following steps of: a, receiving and storingvarious data parameters through a complete vehicle controller; b, detecting positions of an accelerator pedal and a brake pedal through the complete vehicle controller; c, making the vehicle enter a brake working state, and executing the steps d and e simultaneously; d, calculating the needed braking force; e, judging whether the energy recovery work can be performed; f, judging an actual workingcondition of the vehicle; and g, controlling a motor to recover energy through a motor controller according to the requirement of the complete vehicle controller. The invention has the advantages that: the method for recovering brake energy of the hybrid electric vehicle guarantees that a system on chip (SOC) cannot spill and calculates corresponding power generation torque aiming at different braking conditions; therefore, the recovered brake energy is maximized.

Description

technical field [0001] The invention belongs to the technical field of hybrid electric vehicles, and relates to a method for recovering braking energy of a hybrid electric vehicle. Background technique [0002] As the industrialization of new energy vehicles is approaching, more and more auto suppliers are spending huge manpower and material resources on new energy vehicles. Hybrid vehicles not only have the technical characteristics of a wide range of energy sources and high economic benefits, but also can realize energy supply when the vehicle decelerates and brakes through the energy recovery system. The specific recovery method is to switch the motor to In power generation mode, the motor converts kinetic energy into electrical energy and stores it in the battery while assisting braking, so as to improve the energy utilization efficiency of the vehicle and increase the mileage of the vehicle. At present, a series of brake energy recovery systems with relatively complete...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L7/10
Inventor 曹君孙文凯李传海由毅丁勇李书福杨健赵福全
Owner VIRIDI E MOBILITY TECH NINGBO CO LTD
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