Articulated vehicle drive and control system

Details Articulated vehicle drive and control system Articulated vehicle drive and control system

1982-10-22

1985-05-21

Peters, Jr., Joseph F.

Motor vehicles

Vehicle trains

Motorized trailer

180307, 280432, B62D 4702

Patent

active

045180539

ABSTRACT:
A drive and control system for articulated vehicles which normally operates in an efficient push-mode with only the wheels of the rear section being driven, but which operates in a hybrid mode when the vehicle has a tendency to jackknife wherein a controlled torque is applied to the rear wheels of the forward section. The value of the torque is determined as a predetermined increasing function of the magnitude of the connection force at the articulation connection and the magnitude of the articulation angle. In a preferred embodiment of the invention, the drive shaft to the differential which drives the wheels of the rear section also drives a variable displacement hydraulic pump which feeds fixed displacement hydraulic motors connected by overrunning clutches to the rear wheels of the forward section. Thus the average displacement of the hydraulic pump is constant and the torque applied to the middle wheels of the rear section is proportional to the hydraulic pressure, which may be adjusted by temporarily increasing or decreasing the pump displacement. The preferred system may easily be modified to compensate for loss of rear tire traction and to accommodate an hydraulic accumulator for energy storage and dynamic braking.

REFERENCES:
patent: 2851115 (1958-09-01), Buckendale
patent: 3227235 (1966-01-01), Budzich et al.
patent: 3374847 (1968-03-01), Budzich
patent: 3532177 (1970-10-01), Herrmann
patent: 3913697 (1975-10-01), Greene
patent: 4180138 (1979-12-01), Shea
patent: 4320811 (1982-03-01), Queveau
patent: 4371186 (1983-02-01), Queveau et al.
patent: 4405145 (1983-09-01), Bergman et al.
patent: 4412592 (1983-11-01), Bergman et al.

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