Title:
VEHICLE STEPLESS TRANSMISSION CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/133257
Kind Code:
A1
Abstract:
The present invention relates to a vehicle stepless transmission control device that is provided with: a primary pulley (2); a secondary pulley (3); an oil pump (11); a V belt (4); a transmission control means (22) that uses the oil pressure of the oil pump (11) and, in accordance with the travel conditions of a vehicle, controls the oil pressure of a hydraulic oil supplied to each pulley (2, 3) and controls a transmission gear ratio; and a road surface determining means (21) that determines whether road surface conditions indicate a good road or a not-good road. The transmission control means (22) is provided with: a not-good-road-response control means (22b) that, when not-good-road determination is made, makes oil force greater than for when good-road determination is made; and a rotational speed control means (23) that, when not-good-road determination is made, performs rotational speed control such that the rotational speed of the primary pulley is at or above a set lower-limit rotational speed. The present invention can thereby increase belt clamping force during not-good-road travel and prevent slippage of the V belt (4), and can suppress the occurrence of control hunching.
Inventors:
SASAKI KIYOFUMI (JP)
ITOU YOUJI (JP)
ABE KOSUKE (JP)
ITOU YOUJI (JP)
ABE KOSUKE (JP)
Application Number:
PCT/JP2015/054200
Publication Date:
September 11, 2015
Filing Date:
February 17, 2015
Export Citation:
Assignee:
JATCO LTD (JP)
NISSAN MOTOR (JP)
NISSAN MOTOR (JP)
International Classes:
F16H61/02; F16H59/66; F16H61/662
Foreign References:
| JP2009275777A | 2009-11-26 | |||
| JP2000027984A | 2000-01-25 | |||
| JP2010261570A | 2010-11-18 |
Other References:
See also references of EP 3115649A4
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
Hiromichi Kobayashi (JP)
Hiromichi Kobayashi (JP)
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