Steering servo system

A servo system and servo control technology, applied in the field of steering servo system, can solve problems such as driver acceleration correction, achieve the effects of good directional stability, high energy efficiency, and reduce the risk of error correction

Active Publication Date: 2010-11-24
SCANIA CV AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] On passenger cars (such as Volkswagen and Audi), the steering system is resistant to crosswind disturbances but cannot be corrected by the driver's acceleration

Method used

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Examples

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Embodiment Construction

[0020] The present invention is described in detail below with reference to the accompanying drawings, using the following parameters and expressions:

[0021] Steering Wheel Angle - SWA, also known as delta h .

[0022] Steering Wheel Torque - SWT, also known as M h .

[0023] Yaw rate - YR.

[0024] The location of the vehicle's center of gravity - COG.

[0025] figure 1 It is schematically shown how the steering wheel acts via the steering wheel lever to steer the wheels of the vehicle. It shows the actual steering wheel lever, but those skilled in the art will understand that there are other solutions, such as electrical transfer of control signals to the auxiliary motors adapted to perform steering locally.

[0026] figure 1 A steering servo system 2 for a vehicle is shown comprising at least one or more of the following components: a yaw angle sensor 6 adapted to detect a current steering wheel angle and to generate a steering wheel angle signal SWA in response to...

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Abstract

Steering servo system for a vehicle comprising at least one or more from among a steering wheel angle sensor adapted to detecting current steering wheel angle and generating a steering wheel angle signal SWA in response thereto, a steering wheel torque sensor adapted to detecting current steering wheel torque and generating a steering wheel torque signal SWT in response thereto, and a yaw rate sensor adapted to detecting current yaw rate and generating a yaw rate signal YR in response thereto, said signals being adapted to being conveyed to a servo control unit. The system further comprises one or more centre of gravity sensors connected to a centre of gravity calculation unit which is adapted to calculating the vehicle's centre of gravity on the basis of measured values received from the centre of gravity sensors. The centre of gravity signal is conveyed to said servo control unit, which servo control unit is adapted to calculating one or more parameters SGR, SA for the servo control system in response to said centre of gravity signal and at least one from among the other signals. The invention also relates to a method of the steering servo system.

Description

technical field [0001] The invention relates to a steering servo system for a vehicle and a method for a steering servo system according to the preambles of the independent claims. Although the invention is exemplified by application on a bus, it is equally applicable to trucks or passenger cars or any other vehicle equipped with a steering servo system. Background technique [0002] Buses and trucks, as well as most passenger cars today, are equipped with steering servos to help the vehicle steer. In simple terms, the way a servo system works is that a servo motor assists in steering the vehicle based on one or more input signals such as steering wheel angle, steering wheel torque, and yaw rate. [0003] The steering servo helps in particular to correct directional deviations which occur, for example, when the vehicle is subjected to external disturbances such as strong winds. Large vehicles such as buses and trucks are often sensitive to crosswinds, and in strong crosswi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D6/00B62D113/00B62D119/00B62D111/00B62D137/00
CPCB62D6/04G01M1/122
Inventor M·尤林
Owner SCANIA CV AB
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