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US 4,901,811 AGranted
Vehicle steering system for adjusting tire characteristic
AssigneeNissan Motor Co., Ltd.
InventorsTakaaki Uno, Hiroyasu Kan, Hiroshi Tonomura
Life of this patent
Estimating the term…
Abstract
A vehicle has rear wheels each equipped with a rear tire having a tire characteristic which is different from that of front wheels, and which is suitable for one cornering condition, for example, a condition in which a lateral acceleation is high, and a steering system which steers the rear wheels so as to remedy the deficiency of the tires of the rear wheels in another cornering conditions.
Claims16
A vehicle comprising;
- front wheels each equipped with a front tire and rear wheels each equipped with a rear tire having a rear tire characteristic which is different from a front tire characteristic of said front tire,
- a rear wheel steering system for steering the vehicle by varying a rear wheel steer angle, and
- controlling means for adjusting said rear tire characteristic by varying said rear wheel steer angle in a predetermined first cornering condition of the vehicle, wherein each of the front and rear tire characteristic is a relationship between cornering force and tire slip angle, and the front and rear tire characteristics are different in tire slip angle at maximum cornering force which is a tire slip angle at which the cornering force is increased to a maximum.
A vehicle comprising;
- front wheels each equipped with a front tire and rear wheels each equipped with a rear tire having a rear tire characteristic which is intentionally made different from a front tire characteristic of said front tire,
- a rear wheel steering system for steering the vehicle by varying a rear wheel steer angle, and
- controlling means for adjusting the rear tire characteristic by varying the rear wheel steer angle in a predetermined cornering condition of the vehicle,
- wherein the front and rear tire characteristics are different in cornering power.
1 more element
A vehicle comprising;
- front wheels each equipped with a front tire, and rear wheels each equipped with a rear tire which is different from said front tire in a tire characteristic which is a relationship between cornering force and tire slip angle,
- a rear wheel steering system for steering the vehicle by varying a rear wheel steer angle, and
- controlling means for making the tire characteristic of the rear tires closer to the tire characteristic of the front tires by controlling said rear wheel steer angle in a predetermined first cornering condition.
Dependencies are inferred from the claim text.