Torque monitoring method and system thereof for electric automobiles

A torque monitoring, electric vehicle technology, applied in electric vehicles, battery/fuel cell control devices, motors, etc., can solve problems such as vehicle runaway, and achieve the effect of preventing unreasonable, ensuring driving safety, and avoiding vehicle torque runaway.

Active Publication Date: 2015-08-19
BEIJING BORGWARD AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] For this reason, the technical problem to be solved by the present invention is that when the vehicle controller fails, it may cause the technical problem t

Method used

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  • Torque monitoring method and system thereof for electric automobiles
  • Torque monitoring method and system thereof for electric automobiles

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Embodiment 1

[0064] This embodiment provides a torque monitoring method for an electric vehicle, comprising the following steps:

[0065] First, the vehicle controller detects the vehicle manipulation signal and the vehicle state signal, and calculates the actual torque of the motor based on them. The vehicle manipulation signal is obtained according to the driver's driving intention, including braking signals, acceleration signals, and gear signals; The vehicle state signal is obtained according to the current driving state of the electric vehicle, including vehicle speed, motor speed, maximum traction torque of the motor and maximum power generation torque of the motor. State of charge, battery temperature, motor temperature, motor controller temperature and accessory power are calculated. Then, according to the difference between the calculated actual torque and the motor monitoring torque, it is judged whether there is a fault in the vehicle control system. If there is a fault, a fault...

Embodiment 2

[0084] This embodiment provides a torque monitoring system for an electric vehicle, which is used to implement the above torque monitoring method, including:

[0085] The actual torque calculation unit is used to detect the vehicle manipulation signal and the vehicle state signal, and calculate the actual torque of the motor according to them. The actual torque calculation unit further includes: a torque analysis module for performing torque analysis processing on the current torque obtained by the vehicle controller according to the vehicle manipulation signal and the vehicle state signal to obtain the first torque; and for performing torque filtering processing on the first torque A torque filtering module for obtaining a smooth second torque; a torque arbitration module for performing torque arbitration on the second torque according to the maximum traction torque of the motor and the maximum power generation torque of the motor to obtain a third torque; for outputting the t...

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Abstract

The invention discloses a torque monitoring method and system thereof for electric automobiles, and belongs to the technical field of the control of electric automobiles. The torque monitoring method comprises the following steps: detecting vehicle control signals and vehicle state signals, and calculating the actual torque of a motor according to the detected signals; judging whether the control system of the whole vehicle is failed or not, if yes, generating fault adjusting torque according to the type of the fault; when the control system of the whole vehicle is normal, using the actual output torque of the motor as demanded torque, else, using the fault adjusting torque as demanded torque; calculating a torque threshold according to the vehicle control signals, the vehicle state signals and the capabilities of components and parts; making a comparison between the demanded torque and the torque threshold, and limiting the demanded torque within the range of torque threshold so as to obtain output torque. The technical problem that the vehicle is out of control because of the fault of the controller of the whole vehicle is solved, particularly, the output demanded torque can be monitored, so that the sudden change of the demanded torque or the phenomenon that the demanded torque exceeds the seasonal threshold range can be avoided.

Description

technical field [0001] The invention relates to the technical field of electric vehicle control, in particular to a torque monitoring method for an electric vehicle. Background technique [0002] In the 20th century, petroleum, coal and natural gas-based petrochemical energy supported the rapid development of human beings, but as time went by, the storage of these petrochemical energies decreased, and at the same time, the gas produced by the consumption of petrochemical energies was troubling people—Greenhouse effects, haze weather and other abnormal phenomena. Under the dual pressure of environmental pollution and energy crisis, the research and development of new energy vehicles is imperative. As the only zero-emission vehicle, a pure electric vehicle uses a motor instead of an internal combustion engine. It has low noise and no pollution. It can use a wide range of sources of electric energy as power, and it can use the cheap "valley power" of the power grid for chargin...

Claims

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Application Information

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IPC IPC(8): B60L15/20
CPCB60L3/0023B60L15/20B60L58/12B60L2240/425B60L2240/545Y02T10/64Y02T10/70Y02T10/72
Inventor 邹正佳孔令安艾名升
Owner BEIJING BORGWARD AUTOMOBILE CO LTD
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