EP0309293A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Method for controlling the front wheel steer angle

Assignee: Honda Motor Co Ltd

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Filing: 1988-09-26

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Granted: —

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Expires: 2008-09-26

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Abstract

Abstract The method of the present invention improves the damping property of the yaw motion of the vehicle by feeding back a detected yaw rate value (r) in a dynamic sense for compensating the front wheel steer angle (8f) so as to increase the damping coefficient(Ç) of the yaw motion of the vehicle. By controlling the front wheel steer angle by accounting for not only the proportional term of the steering wheel input angle (8sw) but also the derivative term which is proportional to the steering wheel input angular speed, in the feed-forward control of the front wheel steer angle in relation with the steering operation by the driver, and by appropriately varying the control parameters of the yaw rate feed-back and the steering wheel input feed-forward, the yaw response of the vehicle can be made proportional to the steering wheel input, and the response delay in the yaw rate against the steering wheel input can be reduced to substantially zero.

Inventors

👤 Yoshimi Kabushiki Kaisha Furukawa
👤 Akihiko Kabushiki-Kaisha Honda Takei
👤 Shinnosuke Kabushiki Kaisha Ishida
👤 Nobuyuki Kabushiki Kaisha Ohno

Bibliographic Details

Application Number —

Jurisdiction EP

Data Source google_patents

Last Synchronized 2026-10-24 10:16

CPC Classifications

B; B62; B62D; B62D5/00; B62D5/008; B62D6/00; B62D6/002; B62D6/003

Claims Analysis

Total Claims: 6

Claim 1

Independent Claim 113 words

A method for controlling the front wheel steer angle in a front wheel steering system which controls the front wheel steer angle 8 f as a sum of a steering wheel input angle feed-forward term f: (δ sw ) which is based on the steering wheel input angle δ sw , and a yaw rate feed-back term f 2 (r) which is based on a detected value of the yaw rate r, or according to the following formula; wherein: the transfer function of the yaw rate feed-back term f 2 (r) with respect to the yaw rate value r is given by (where s is the Laplace variable and {} denotes Laplace transformation).

Claim 2

Independent Claim 113 words

Claim 3

Dependent Claim 64 words

A method for controlling the front wheel steer angle as defined in claim 1, wherein when the transfer function of the yaw rate value r with respect to the front wheel steer angle 8 f , or G 1 (s), is given by (where G 1 (0) is the yaw rate value when the vehicle is undergoing a steady turn), T i = Tr.

Claim 4

Dependent Claim 39 words

A method for controlling the front wheel steer angle as defined in claim 2, wherein Ti and T d are both functions of the vehicle speed V o , and become larger in value as the vehicle speed increases.

Claim 5

Dependent Claim 44 words

A method for controlling the front wheel steer angle as defined in claim 1, 2 or 3, wherein the steering wheel input angle feed-forward term fi (δ sw ) is given as a sum of a proportional term and a derivative term or as

Claim 6

Dependent Claim 17 words

A method for controlling the front wheel steer angle as defined in claim 4, wherein the and

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