Invention Grant
- Patent Title: Control of multi-speed transmission
- Patent Title (中): 多速传输控制
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Application No.: US12650396Application Date: 2009-12-30
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Publication No.: US08374760B2Publication Date: 2013-02-12
- Inventor: Mark Snyder , Ronald A. Holland
- Applicant: Mark Snyder , Ronald A. Holland
- Agent Kenneth L. Green
- Main IPC: G06F7/00
- IPC: G06F7/00 ; G06F17/00 ; G06F19/00

Abstract:
Apparatus and method for efficiently controlling an automatic transmission in an electric vehicle. The method may be implemented by selection of one of at least two belt clutches having different ratios. The timing for disengagement and engagement of each clutch and the proper sequencing of the disengagement and engagement of the clutches is determined to optimize the efficiency of the transmission. A direct drive motor is directly coupled to the transmission's output shaft to provide momentary power to maintain a nearly constant rate of acceleration during shifting. The method may further be applied for shifting an electric vehicle with a first motor coupled to an output shaft through a single belt clutch and a direct drive motor.
Public/Granted literature
- US20100168971A1 Control of Multi-Speed Transmission Public/Granted day:2010-07-01
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