Method of timed shift to neutral in apparent stationary modes

Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Clutch control

Reexamination Certificate

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Details

C701S052000, C192S003510

Reexamination Certificate

active

07149617

ABSTRACT:
A control for a transmission and a clutch monitors conditions to determine when a vehicle associated with the clutch and transmission is likely in a stationary state. If the vehicle appears to be stationary, with the transmission engaged and the clutch open, then the control determines that the transmission should be moved to a neutral position. Upon movement to the neutral position, the control then closes the clutch. It is preferable for a vehicle remaining stationary to have its clutch closed and its transmission in neutral than to have its transmission engaged and its clutch open. In a further aspect of this invention, the neutral state is verified by testing the ability to move one of the transmission shift components. If the transmission shift component can move beyond a predetermined amount, this is indicative that the transmission is in neutral.

REFERENCES:
patent: 4631422 (1986-12-01), Piasecki
patent: 6170587 (2001-01-01), Bullock

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