Apparatus for controlling speed of vehicle

Boots – shoes – and leggings

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Details

36442604, 74866, B60K 3104

Patent

active

051556820

ABSTRACT:
An apparatus for controlling speed of a vehicle to consist with a target speed in cruising mode, the vehicle having power transmission for selecting a gear ratio from plural predetermined gear ratios comprising: detector means for detecting the speed; and controller: for producing a first control signal for effecting downshifting to high when the speed decreases under the target speed; for detecting increase rate of the speed in response to the first control signal; and for producing a second control signal for effecting upshifting in response to said first control signal with delay determined by the increase rate. A negative pressure pump may be further provided for driving a negative pressure actuator controlling a throttle valve, the pump is turned on when the speed decreases under a given value before detection of lack of negative pressure downstream from a throttle valve, for driving negative pressure actuator controlling the throttle valve. A fail-safe system may be further provided which detects excessive flow rate of air-fuel mixture due to trouble at the negative pressure actuator in cruising mode for preventing unintentional and rapid acceleration.

REFERENCES:
patent: 4814991 (1989-03-01), Tada et al.
patent: 4845621 (1989-07-01), Kawata et al.
patent: 4853673 (1989-08-01), Kido et al.
patent: 4905786 (1990-03-01), Miyake et al.
patent: 4931939 (1990-06-01), Kawata et al.
patent: 4933859 (1990-06-01), Tsuyama et al.

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