Motor vehicles – With means responsive to speed of vehicle for maintaining... – Including electrically actuated servomechanism
Patent
1991-11-05
1993-03-30
Mitchell, David M.
Motor vehicles
With means responsive to speed of vehicle for maintaining...
Including electrically actuated servomechanism
180170, 36442604, B60K 3104
Patent
active
051975645
ABSTRACT:
A cruise control apparatus for a vehicle is effective to prevent hunting in the vehicle speed and resultant shocks which are apt to occur when the vehicle is travelling on a down slope under cruise control. A cruise control unit is adapted to be actuated by a driver of the vehicle for automatically controlling the opening degree of a throttle valve so that the speed of the vehicle is maintained at a predetermined target speed. A fuel control unit controls the fuel supply to the vehicle engine such that the fuel supply is cut off when the throttle valve is moved to a fully closed or idling position thereof with the number of revolutions per minute of the engine being equal to or greater than a predetermined value during cruise control. In one aspect, the fuel cut-off is cancelled when the speed of the vehicle decreases below a predetermined lower limit for the target speed during cruise control, and at the same time, the cruise control is temporarily interrupted for a predetermined length of time. In another aspect, the cut-off of the fuel supply by the fuel control unit is inhibited when the vehicle is travelling under cruise control.
REFERENCES:
patent: 5023792 (1991-06-01), Shioyama
patent: 5024284 (1991-06-01), Nakano et al.
Katayama Kazuyori
Nishimura Yukinobu
Mitchell David M.
Mitsubishi Denki & Kabushiki Kaisha
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