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Cruising speed control method and device

A cruising vehicle speed and control method technology, which is applied in the field of constant speed cruising, and can solve the problem that the instrument vehicle speed cannot stabilize the cruising and setting the vehicle speed, etc.

Inactive Publication Date: 2020-02-07
CH AUTO TECH CORP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In some pure electric vehicles equipped with dual motors, only one motor works in D (forward) gear to improve vehicle economy, and two motors work simultaneously in S (sports) gear to improve vehicle dynamics, which will give the vehicle a certain The high-speed cruise function brings a problem. Because the total energy loss of the motors in D and S gears is different, if the same cruise torque calculation method is used, the instrument speed will not be stable at the cruise set speed in a certain gear.

Method used

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  • Cruising speed control method and device
  • Cruising speed control method and device
  • Cruising speed control method and device

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Embodiment Construction

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] When the vehicle is in cruise mode, when calculating the cruise torque, the cruise set speed V s and cruise reference speed V c The difference V input The cruise torque is calculated in real time as the input vehicle speed variable of the cruise torque. Currently, when the vehicle is in cruise mode, in D and S gears, when calculating the cruise torque, when calculating V input The algorithm used is the same.

[0038] For pure electric vehicles equipped with dual motors, only one motor works in D gear, and the two motors work simultaneously in S gear, so that the total energy loss of the motor in S gear is greater than that in D gear. Based on this, the inventor believes that: when a pure electric vehicle with dual motors is in cruising mode, when calculating the cruising torque in the S gear, the V gear that is exactly the ...

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Abstract

The embodiment of the invention discloses a cruising speed control method and a cruising speed control device which are applied to a pure-electric automobile provided with double motors. The method comprises the following steps of: when the automobile is in a cruising mode, calculating cruising reference speed Vc in real time according to actual speed; calculating cruising torque input speed variable (Vinput=set cruising speed-Vc); judging whether the current shift of the automobile is a sport shift according to a shift signal transmitted from a shift controller; if yes, regulating the Vc to be equal to Vc*K, wherein K represents a preset constant related to the automobile speed; K is smaller than 1 and the value of K is reduced with increment of the actual speed; and regulating the Vinputaccording to a formula that Vinput=set cruising speed-Vc. The method disclosed by the embodiment of the invention can make sure that the instrument speed under an S shift can be stabilized to be equal to the set cruising speed when the automobile provided with double motors is in the cruising mode.

Description

technical field [0001] The invention relates to the technical field of cruise control, in particular to a method and device for controlling the speed of a cruise vehicle. Background technique [0002] With the improvement of people's living standards, cars are more and more closely related to people's lives. [0003] In some pure electric vehicles equipped with dual motors, only one motor works in D (forward) gear to improve vehicle economy, and two motors work simultaneously in S (sports) gear to improve vehicle dynamics, which will give the vehicle a certain The high-speed cruise function brings a problem. Because the total energy loss of the motors in D and S gears is different, if the same cruise torque calculation method is used, the instrument speed will not be stable at the cruise set speed in a certain gear. Contents of the invention [0004] Embodiments of the present invention provide a cruise speed control method and device, so that when a pure electric vehicle...

Claims

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Application Information

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IPC IPC(8): B60W30/14
CPCB60W30/146
Inventor 王克坚容毅楠
Owner CH AUTO TECH CORP CO LTD