Accession Number:

ADD005918

Title:

Hydraulic Control for Hydromechanical Transmission.

Descriptive Note:

Patent,

Corporate Author:

DEPARTMENT OF THE ARMY WASHINGTON D C

Personal Author(s):

Report Date:

1978-09-05

Pagination or Media Count:

11.0

Abstract:

A power transmission that includes hydraulically-operated clutches that are selectively supplied with operating fluids by a selector valve that is controlled by an error signal means constructed to compare prime mover speed and user demand speed. The transmission preferably is a split torque hydromechanical transmission having one power path going through a hydrostatic pump-motor unit and another path going only through epicycloidal gearing system containing the hydraulically-operated clutches. The transmission is controlled hydraulically rather than mechanically, thereby avoiding problems relating to mechanical slack, response lag, and reliability. Author

Subject Categories:

  • Surface Transportation and Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE