Land vehicles – Wheeled – Running gear
Patent
1991-08-16
1992-11-17
Marmor, Charles A.
Land vehicles
Wheeled
Running gear
280707, 3644241, 36442405, 36443104, B60G 2100, G06F 1548
Patent
active
051637022
ABSTRACT:
A vehicle suspension comprises dampers changeable between low and high damping modes and normally operated in the low damping mode. A damper control stores a plurality of sets of reference numbers as a function of vehicle velocity, the reference numbers of each set representing limit values of throttle velocity for the low damping mode for a given transmission gear mode. The reference numbers of each set increase in value with increasing vehicle velocity in a continuously non-linear manner so as to compensate for the decreasing acceleration and body lift produced by a given throttle velocity as vehicle velocity increases. The control changes the damper from low to high damping during vehicle acceleration for a predetermined time when the throttle velocity exceeds a throttle velocity limit reference derived from the reference number corresponding to the vehicle velocity in the set corresponding to the selected transmission gear mode. The control further changes the dampers from low to high damping for a predetermined time when vehicle deceleration exceeds a reference, when a transmission shift occurs or when engine torque first exceeds a reference.
REFERENCES:
patent: 4602805 (1986-07-01), Tanaka et al.
patent: 4686626 (1987-08-01), Kuroki et al.
patent: 4691284 (1987-09-01), Izumi et al.
patent: 4732408 (1988-03-01), Ohlin
patent: 4809660 (1989-03-01), Marsh et al.
patent: 4897776 (1990-01-01), Urababa et al.
"Speed-dependent damping for the Cadillac Allante", Automotive Technology International '90, Sterling Publications International, Ltd., 1990.
Campbell Douglas C.
Ludwig Howard H.
Poirier David C.
Westphal Patrick J.
Wood Fred G.
Dickson Paul
General Motors Corporation
Marmor Charles A.
Sigler Robert M.
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