Tire contact load control system

Details Tire contact load control system Tire contact load control system

1998-03-24

2000-04-25

Rice, Kenneth R.

Land vehicles

Suspension modification enacted during travel

Including condition or parameter adjustment occurring at...

280 552, B62D 902

Patent

active

060535091

ABSTRACT:
An active actuator is interposed between the unsprung mass and the sprung mass of a vehicle, and extended and retracted in a cyclic manner so as to apply a prescribed reaction to the unsprung mass during an extending stroke of the actuator. Thus, the additional contact load is applied to the tire in a cyclic manner over a desired period of time so that the gripping force of the tire can be increased over a desired period of time. Although the increase in the tire contact load and the reduction in the tire contact load occurs in an alternating, cyclic manner, it is possible to achieve an overall advantage for instance in reducing the braking distance by intermittently increasing the tire contact load of the rear wheels by detecting the braking action of the vehicle with a suitable acceleration sensor or the like. In particular, by setting a retracting stroke of the actuator substantially longer in time duration than an extending stroke of the actuator, it is possible to reduce the degree of the contact load reduction between each consecutive phase of contact load increase, and to achieve an even better overall result.

REFERENCES:
patent: 4625993 (1986-12-01), Williams et al.
patent: 5015009 (1991-05-01), Ohyama et al.
patent: 5044660 (1991-09-01), Yamamura et al.
patent: 5183127 (1993-02-01), Kageyama et al.
patent: 5269556 (1993-12-01), Heyring

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