Title:
METHOD AND DEVICE FOR DETERMINING MAXIMUM GEAR RATIO OF TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2019/001372
Kind Code:
A1
Abstract:
Disclosed are a method and a device for determining the maximum gear ratio of a transmission. The method for determining the maximum gear ratio of a transmission comprises: on the basis of universal characteristic data of an engine, determining respective corresponding minimum engine fuel consumption rates when a vehicle is travelling at multiple constant speeds, and engine rotation speeds corresponding to the minimum engine fuel consumption rates; for each of the minimum engine fuel consumption rates, determining a speed ratio corresponding to the minimum engine fuel consumption rate; obtaining a weighted average of the corresponding engine fuel consumption rates when the vehicle when travelling at the various constant speeds under each speed ratio; and determining the speed ratio, corresponding to the minimum from among the obtained weighted averages of the engine fuel consumption rates, to be the maximum gear ratio of a transmission. The method obtains the maximum gear ratio of the transmission based on the consideration of fuel economy, and takes less time, requires low input cost and is highly efficient overall.
Inventors:
LU LIPENG (CN)
XU JIAN (CN)
LU YONGXIN (CN)
XU JIAN (CN)
LU YONGXIN (CN)
Application Number:
PCT/CN2018/092496
Publication Date:
January 03, 2019
Filing Date:
June 22, 2018
Export Citation:
Assignee:
GREAT WALL MOTOR CO LTD (CN)
International Classes:
F16H61/02; F16H59/74
Foreign References:
| CN105782428A | 2016-07-20 | |||
| CN106224537A | 2016-12-14 | |||
| CN103213544A | 2013-07-24 | |||
| US20170159802A1 | 2017-06-08 | |||
| US20080027612A1 | 2008-01-31 |
Other References:
See also references of EP 3640504A4
Attorney, Agent or Firm:
RUNPING & PARTNERS (CN)
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