Pump/Motor Displacement Control Using High-Speed On/Off Valves Ford Motor Company

Format:

Conference/Event

Author/Creator:

Sosnowski, Tim, author.

Conference Name:

International Off-Highway & Powerplant Congress & Exposition (1998-09-14 : Milwaukee, Wisconsin, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1998

Summary:

A four valve controller and electronic control circuits were developed to control the displacement of hydrostatic pump/motors (P/M's) utilized in an automobile with a hydrostatic transmission and hydropneumatic accumulator energy storage. Performance of the control system was evaluated. The controller uses four high-speed, two-way, single-stage poppet valves, functioning in the same manner as a 4-way, 3-position spool valve. Two such systems were used to control the displacement of two P/Ms, each system driving a front wheel of the vehicle. The valves were controlled electronically by a distributed-control dead-band circuit and valve driver boards. Testing showed that the control system's time response satisified driving demand needs, but that the control system's error was slightly larger than desired. This may lead to complications in some of the vehicle's operating modes

Notes:

Vendor supplied data

Publisher Number:

981968

Access Restriction:

Restricted for use by site license