Machine element or mechanism – Control lever and linkage systems – Foot operated
Patent
1994-04-01
1996-08-06
Bonck, Rodney H.
Machine element or mechanism
Control lever and linkage systems
Foot operated
745026, 74517, G05G 114
Patent
active
055423132
ABSTRACT:
A Dual Radius Geometry Accelerator Control System is provided in which the throttle valve is made to open slowly during the off-idle range of operation then progressively faster during the mid-range operation until a maximum system actuation rate is reached. The throttle valve is then made to open at a gradually decreasing actuation rate until a local minimum actuation rate is reached at the point during the full throttle range of operation that downshifting occurs. Thereafter, the throttle valve is made to open at a substantially linear actuation rate as the control system approaches wide-open throttle. This unique throttle valve actuation scheme is achieved through an inventive control member with a dual radius design for opening the throttle valve at a non-linear actuation rate in response to the linear travel of the accelerator cable and a guide connected to the control member for contacting the accelerator cable such that, in a first range of accelerator pedal actuation, the accelerator cable contacts the guide at an engagement point to open the throttle valve at a first continuously changing actuation rate that reaches a maximum system value at a cross-over point, and in a second phase of accelerator pedal actuation, the accelerator cable pulls the control member from a pull point to open the throttle valve at a second continuously changing actuation rate that has a local minimum value.
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Bonck Rodney H.
Chrysler Corporation
Dobrowitsky Margaret A.
Kim Chong H.
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