Delphi Technologies, Inc.

Michael G Schuplin

Diana K Voges

Daniel Alexander Crawford

Joyce D Carsey

Lisa Marie Unuvar

Robert Harold Wind

David Lynn Ehle

Timothy L Guest

An apparatus and method for controlling the speed of a vehicle, the apparatus manipulates a cable having one end secured to a throttle and the other secured to a motor for applying a force to the cable. A motor controller provides commands to the motor and the motor controller receives an input in the form of a vehicle velocity setting and in response to the value of the setting setting the motor controller instructs the motor to pull the cable a predetermined distance corresponding to a predetermined throttle position, the predetermined distance is stored in a lookup table and the predetermined throttle position corresponds to a vehicle velocity that is similar to the vehicle velocity setting. If the vehicle does not obtain the vehicle velocity setting the control authorizes the motor to pull the cable further, once the vehicle reaches the vehicle velocity setting the controller determines the current throttle position and determines if the current throttle position is greater than the predetermined throttle position if so, the controller modifies the predetermined throttle position corresponding to the vehicle velocity setting.

Apparatus and method for vehicle speed control

An improved cruise control which produces a desired throttle position that is based in part on a selectively updated integral term. The integral term is only updated when the magnitude of the speed error exceeds a predefined value, thereby eliminating changes in the integral term when the speed error is smaller than the predefined threshold. In other words, the integral term is dynamic and responsive to a current error condition when the speed error magnitude exceeds the threshold, and static when the speed error is within the threshold. In this way, the operational advantages of the integral term are retained while avoiding its disadvantages, and the transition between the static and dynamic states of the integral term are smooth and seamless.

Motor vehicle cruise control with selectively updated integral gain

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Davison, MI, United States of America

Michael G Schuplin