Title:
静油圧式無段変速機
Document Type and Number:
Japanese Patent JP4975502
Kind Code:
B2
Abstract:
A hydrostatic continuously variable transmission (CVT) is configured by connecting a swash plate type plunger hydraulic pump (P) and a swash plate type plunger hydraulic motor (M) via a hydraulic closed circuit, an inclined angle of a swash plate (31) of the hydraulic motor (M) is variably controlled, and continuous shift control is executed. There is provided a lock-up mechanism (90) that closes the hydraulic closed circuit so as to make lockup executed when the quantity of oil that flows from the hydraulic pump (P) into the hydraulic motor (M) decreases according to variable control over the inclined angle of the swash plate (31) and the input rotation of the hydraulic pump (P) and the output rotation of the hydraulic motor (M) are substantially synchronous. The lock-up mechanism (90) is operated when lockup control oil pressure is applied and closes the hydraulic closed circuit, however, a lockup control oil passage (131,132,133) that supplies the lockup control oil pressure is provided with an opening (134a) opened and closed according to the inclination of the swash plate (31) and the opening (134a) is closed when the inclined angle of the swash plate (31) is in the vicinity of an angle in a upright condition.
Inventors:
Kenichi Nakano
Yoshida Yoshihiro
Yoshida Yoshihiro
Application Number:
JP2007094664A
Publication Date:
July 11, 2012
Filing Date:
March 30, 2007
Export Citation:
Assignee:
Honda motor industry stock company
International Classes:
F16H39/14
Domestic Patent References:
| JP1108461A | ||||
| JP2006275224A | ||||
| JP7310806A | ||||
| JP2129450A | ||||
| JP54113761A |
Attorney, Agent or Firm:
Masago Onishi