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1. KR1020080027916 - DEVICE AND METHOD FOR CONTINUOUSLY VARIABLE TRANSMISSION OF TRAVELING VEHICLE

Office Republic of Korea
Application Number 1020087002797
Application Date 01.02.2008
Publication Number 1020080027916
Publication Date 28.03.2008
Publication Kind A
IPC
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
H
GEARING
47
Combinations of mechanical gearing with fluid clutches or fluid gearing
02
the fluid gearing being of the volumetric type
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
H
GEARING
61
Control functions within change-speed- or reversing-gearings for conveying rotary motion
38
Control of exclusively fluid gearing
40
hydrostatic
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
H
GEARING
61
Control functions within change-speed- or reversing-gearings for conveying rotary motion
F16H 47/02
F16H 61/40
F16H 61/00
CPC
F16H 61/44
F16H 47/02
F16H 61/462
Applicants KOMATSU LTD.
Inventors NAOKI ISHIZAKI
HIKOSABURO HIRAKI
KOICHIRO ITOU
Priority Data 2005 2005213139 22.07.2005 JP
Title
(EN) DEVICE AND METHOD FOR CONTINUOUSLY VARIABLE TRANSMISSION OF TRAVELING VEHICLE
Abstract
(EN)
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. ┬ęKIPO&WIPO 2008

Also published as
GB0801426.8
GB801426
SE08003303