Title:
DEVICE AND METHOD FOR CONTINUOUSLY VARIABLE TRANSMISSION OF TRAVELING VEHICLE
Document Type and Number:
WIPO Patent Application WO/2007/010743
Kind Code:
A1
Abstract:
A device and a method for continuously variable transmission, wherein a variable displacement
pump (1) and two variable displacement motors (2, 3) are connected to each other
through a closed circuit. A first drive gear (6) to a fourth drive gear (9) are fitted
to the motor shafts (18, 19) of the variable displacement motors (2, 3) through
clutches (13a, 13b) and clutches (14a, 14b). A first driven gear (10) meshed with
the first drive gear (6) and the third drive gear (8) and a second driven gear meshed
with the second drive gear (7) and the fourth drive gear (9) are fitted to an output
shaft (4). The equivalent capacities of the variable displacement motors (2,
3) are differentiated from each other, and a control to zero these capacities is
performed in the descending order of the equivalent capacities. When the capacity of
the variable displacement motor is decreased, the gear ratio of the variable displacement
motor with a capacity reduced to zero is changed to reduce the equivalent capacity,
and the capacity is increased to the maximum one. Thus, since the gear ratio of
continuously variable transmission can be increased, a speed increasing control
by increased continuously variable transmission can be performed.
Inventors:
ISHIZAKI NAOKI (JP)
HIRAKI HIKOSABURO (JP)
ITOU KOICHIRO (JP)
HIRAKI HIKOSABURO (JP)
ITOU KOICHIRO (JP)
Application Number:
PCT/JP2006/313295
Publication Date:
January 25, 2007
Filing Date:
July 04, 2006
Export Citation:
Assignee:
KOMATSU MFG CO LTD (JP)
ISHIZAKI NAOKI (JP)
HIRAKI HIKOSABURO (JP)
ITOU KOICHIRO (JP)
ISHIZAKI NAOKI (JP)
HIRAKI HIKOSABURO (JP)
ITOU KOICHIRO (JP)
International Classes:
F16H47/02; F16H61/00; F16H61/46; F16H61/462
Foreign References:
JPH11230307A | 1999-08-27 | |||
JPH11311328A | 1999-11-09 |
Attorney, Agent or Firm:
NOGUCHI, Takeo et al. (Bandai Bld. 10-14, Kandaawajicho 2-chom, Chiyoda-ku Tokyo, JP)
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