Trw Lucasvarity Electric Steering Limited

Lucas Industries Public Limited Company

John Nicholas Cheel

Russell Wilson Jones

Anthony Walter Burton

Andrew James Stephen Williams

Simon David Stevens

John P Millward

Stuart I Howarth

Robert P Page

An electric power assisted steering system is disclosed in which a torque demand signal ( ) is generated and applied to an electric motor ( ) operatively connected to a steering mechanism ( ) in order to assist a driver of the vehicle when steering the vehicle. The torque demand signal ( ) includes a damping component that is dependent upon a measurement of torque T carried by the steering mechanism and a measurement of the angular velocity &ohgr; of the steering mechanism. The torque produced by the motor ( ) is not obtrusive during &ldquo;hands-on&rdquo; maneuvers but provides enhanced damping in other maneuvers such as a steering flick.

Electrical power assisted steering systems

An electric power assisted steering system is disclosed in which a torque demand signal ( ) is generated and applied to an electric motor ( ) operatively connected to a steering mechanism ( ) in order to assist a driver of the vehicle when steering the vehicle. The torque demand signal ( ) includes a damping component that is dependent upon a measurement of torque T carried by the steering mechanism and a measurement of the angular velocity &ohgr; of the steering mechanism. The torque produced by the motor ( ) is not obtrusive during &ldquo;hands-on&rdquo; manoeuvers but provides enhanced damping in other manoeuvers such as a steering flick.

Relating to electrical power assisted steering systems

A control system for a vehicle transmission in which the clutch is controlled by an actuator including a cylinder to which fluid can be supplied by way of valves. The valves are controlled to give at least two phases of clutch engagement. In the first phase the valves are controlled by a processor so that the clutch starts to transmit a small torque. This phase is followed by a further phase in which if the vehicle brakes are applied the clutch is controlled in accordance with the law E=KdN/dT where E equals the error which the control system seeks to minimize, N is the engine speed, T the time and K a constant. If the brakes are not applied or when they are released the clutch is controlled so as to control at one of a plurality of constant rates, the acceleration of the engine.

Control system for vehicle transmission

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Birmingham, United Kingdom

John Nicholas Cheel