Invention Grant
- Patent Title: Retarding downshift management
- Patent Title (中): 阻止降档管理
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Application No.: US13790732Application Date: 2013-03-08
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Publication No.: US08924119B2Publication Date: 2014-12-30
- Inventor: Timothy D. Schwartz , James Landes
- Applicant: Caterpillar Inc.
- Applicant Address: US IL Peoria
- Assignee: Caterpillar Inc.
- Current Assignee: Caterpillar Inc.
- Current Assignee Address: US IL Peoria
- Agency: Miller, Matthias & Hull
- Main IPC: B60T7/12
- IPC: B60T7/12 ; F16H61/21

Abstract:
A retarding unit in a vehicle is automatically controlled based on conditions including a current setting of the retarding control, downhill grade, speed, current gear, and impending gear change. With the retarder control set in the high position, when the vehicle is operating at a downhill angle greater than the low angle threshold and less than the high angle threshold, and the pending gear is a large step downshift, automatically setting a retarder level to a low retarder level. When the vehicle is operating on level ground and the pending gear is a large step downshift or the current gear is first or second gear, automatically setting the retarder level to off. When the vehicle is operating on flat ground and the deceleration is above a trigger level, automatically setting the retarder level to a low retarder level.
Public/Granted literature
- US20140257656A1 RETARDING DOWNSHIFT MANAGEMENT Public/Granted day:2014-09-11
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