Gm Global Technolgoy Operations, Inc.

Edward Harold Schmidt

William Joseph Chundrlik, Jr

David W Walters

Pamela I Labuhn

Marvin E Carpenter

An adaptive cruise control system that provides a smooth following by limiting the headway to keep it lower than a predetermined maximum. The present invention accomplishes this objective through systematically limiting the headway. In particular, the present invention reduces a time related speed multiplier used in calculating the desired headway, to maintain a headway that is less than an effective maximum sensor range for the adaptive cruise control system.

Adaptive cruise control system

A microprocessor based fuel control for automotive vehicle engines samples the measured air flow rate at fixed intervals and calculates the air mass flow for a cylinder interval which varies with engine speed. A sensor on the engine detects cylinder position for the cylinder interval determination. An independent clock controls the air flow rate sampling periods. During each cylinder interval the air flow rate is integrated for each whole sampling period and is approximated for each partial period at the boundaries of the cylinder interval. The results are summed to obtain the mass air flow for the cylinder interval.

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Shelby Township, MI, United States of America

Edward Harold Schmidt