B - Operations – Transporting – 60 – K
Patent
B - Operations, Transporting
60
K
B60K 31/04 (2006.01) B60K 31/00 (2006.01) F16H 61/70 (2006.01) G01S 13/93 (2006.01)
Patent
CA 2170658
A system and method for implementing an intelligent cruise control using standard engine control modes includes a distance sensor (58) to determine the distance and closing rate relative to a forward vehicle and use this information to implement a distance control mode and a speed control mode. The distance control mode maintains a selectable headway range relative to a forward vehicle and may include accelerating the vehicle or decelerating the vehicle by defueling, engaging an engine brake (retarder), or downshifting the transmission (T) when engine speed permits. The speed control mode maintains a selectable cruising speed if no target vehicle is detected. This cruising speed set point also functions as an upper limit while in the distance control mode. The system and method effect the intelligent cruise control functions utilizing control logic (72) external to the electronic engine control module (40) utilizing the engine speed control mode or engine speed and torque limiting control mode of SAE J1922 or SAE J1939 standards. Alternatively, a cruise control limit speed may be broadcast via SAE J1587 to reduce the vehicle speed upon approaching a forward vehicle so as to reduce the need for driver intervention. The invention may periodically switch between engine control modes to avoid any control mode timeout imposed by some engine manufacturers.
Chakraborty Shubhayu
Mack William Joseph
Borden Ladner Gervais Llp
Eaton Vorad Technologies L.l.c.
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