×

Control system for hybrid drive unit

  • US 6,494,801 B1
  • Filed: 10/03/2000
  • Issued: 12/17/2002
  • Est. Priority Date: 10/08/1999
  • Status: Expired due to Term
First Claim
Patent Images

1. A control system for a hybrid drive unit, which has:

  • a gear mechanism having different rotary members connected to a plurality of power sources; and

    a plurality of engagement elements adapted to be applied by a hydraulic pressure for coupling the rotary members to each other in said gear mechanism and for stopping rotations of a predetermined rotary member, wherein in accordance with applied/released states of said engagement elements, there can be set;

    a forward running range for a forward run by transmitting an input torque to an output member;

    a backward running range for a backward run by transmitting an input torque to the output member; and

    a stop range capable of driving one of the power sources by the other power source, comprising;

    a range switching valve activated in response to the individual set ranges for switching and outputting an initial pressure for applying said engagement elements, to a plurality of passages, and adapted, when the stop range is set, to output a hydraulic pressure to the first engagement element for establishing a torque transmission line from one of said power sources to the other power source and to block the feed of the initial pressure to the second engagement element for establishing, when applied, the torque at said output member.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×