Motor vehicles – With means responsive to speed of vehicle for maintaining... – Including electrically actuated servomechanism
Patent
1978-04-26
1980-03-11
Myhre, Charles J.
Motor vehicles
With means responsive to speed of vehicle for maintaining...
Including electrically actuated servomechanism
123102, 200 47, B60K 2700, F02D 1110, H01H 316
Patent
active
041923987
ABSTRACT:
The invention relates to a mechanism for actuating the carburetor throttle or fuel injection pump rack of an internal combustion engine. The mechanism comprises a ball screw device including an axially fixed nut rotatable by a reversible electric motor to axially reciprocate a screw concentrically within the nut and connected to the engine throttle or rack. Within and axially fixed relative to the nut is a caged ball arrangement which, when the cage is allowed to rotate, couples the nut to the screw to produce said axial displacement, but when the cage is blocked against rotation, causes the nut to freewheel. Stops carried by the screw are provided to engage and block the cage at each end of the axial travel of the screw to determine the stroke length thereof, and limit switches are provided actuated at each end of the stroke, to reverse the motor. One of the stops is operable to simultaneously block the cage and actuate the associated limit switch, this stop also being axially adjustable thereby to adjust the length of the stroke of the screw.
REFERENCES:
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patent: 2944436 (1960-07-01), Pickles
patent: 2964601 (1960-12-01), Stockwell
patent: 3029660 (1962-04-01), Sears
patent: 3338225 (1967-08-01), Nicholson
patent: 3767972 (1973-10-01), Noddings
patent: 3851125 (1974-11-01), Deming
Associated Engineering Limited
Miller Carl Stuart
Myhre Charles J.
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