Fluid-pressure and analogous brake systems – Inertia control
Patent
1994-04-15
1995-09-26
Graham, Matthew C.
Fluid-pressure and analogous brake systems
Inertia control
477186, 477195, B60K 4128
Patent
active
054529468
ABSTRACT:
This invention provides a hill-holder control system for operating vehicle brakes of a nature readily retrofit on existing vehicles. This system solves the problem of stopping and starting motion as when a traffic signal is encountered upon an upwardly inclined roadway while preventing backward motion of the vehicle. This problem is even more particularly evident in vehicles having a clutch where a foot must be removed from the brake to the accelerator and the clutch disengaged in a critical rhythmic sequence. Provisions are made so that backwards motion under control of the driver is possible in an automated embodiment of the invention by way of a manual override braking switch. In order to actuate the braking, a sensor is conditionally responsive solely to rearward movement of said vehicle is provided for latching a braking solenoid into braking position for release, for example, the braking is not actuated under the conditions that the accelerator lever is depressed or that reverse gear is engaged. The braking solenoid in a preferred embodiment is coupled to the braking lever so that it may be retrofit on existing vehicles. The system is operable both in vehicles with and without clutches and with mechanical, hydraulic or air brake systems. A novel proximity braking switch for sensing vehicle rearward motion sensor operates a braking signal switch magnetically from a rotatable member that rotates when the vehicle is moving backward.
REFERENCES:
patent: 1967698 (1934-07-01), Whyte
patent: 2159772 (1939-05-01), Schroedter
patent: 2949989 (1960-08-01), Lindstrom et al.
patent: 2959261 (1960-11-01), Hemphill
patent: 3923127 (1975-12-01), Radcliffe et al.
patent: 4076093 (1978-02-01), Mizuno
patent: 4915131 (1990-04-01), Cha
Brown Laurence R.
Graham Matthew C.
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