Motor vehicles – With means responsive to speed of vehicle for maintaining... – Including electrically actuated servomechanism
Patent
1986-12-31
1990-04-17
Marmor, Charles A.
Motor vehicles
With means responsive to speed of vehicle for maintaining...
Including electrically actuated servomechanism
180176, 36442604, B60K 3104
Patent
active
049172069
ABSTRACT:
An apparatus for controlling a throttle valve to retain the speed of running of an automotive vehicle within an insensible range having a predetermined width defined by upper and lower limits. The apparatus includes a first sensor sensitive to vehicle speed for providing a vehicle speed signal indicative of the sensed speed of running of the vehicle and a second sensor sensitive to throttle valve position for providing a throttle-valve position signal indicative of the sensed position of the throttle valve. The apparatus also includes a control circuit coupled to the first and second sensors for increasing a predetermined degree and narrowing the predetermined width of therefor the insensible range in response to the vehicle speed signal having a period within a predetermined range and a peak-to-peak value greater than a predetermined value and the throttle-valve position signal having a period within a predetermined range and a peak-to-peak value greater than a predetermined value. The control circuit moves the throttle valve the predetermined degree in a closing direction in response to the sensed vehicle speed greater than the upper limit and moves the throttle valve the predetermined degree in an opening direction in response to the sensed vehicle speed less than the lower limit.
REFERENCES:
patent: 3766367 (1973-10-01), Sumiyoshi et al.
patent: 4394739 (1983-07-01), Suzuki et al.
patent: 4479184 (1984-10-01), Nakano
patent: 4520778 (1985-06-01), Nanjo et al.
patent: 4560024 (1985-12-01), Noda et al.
Johnson Brian
Marmor Charles A.
Nissan Motor Company Limited
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