Engine speed synchronization system for assisting in manual tran

Details Engine speed synchronization system for assisting in manual tran Engine speed synchronization system for assisting in manual tran

1995-07-27

1996-10-29

Wright, Dirk

Interrelated power delivery controls, including engine control

Transmission control

Engine controlled by transmission

477111, B60K 4108

Patent

active

055691153

ABSTRACT:
An improved system for synchronizing the output speed of an engine with that necessary at the next expected gear to achieve a desired speed ratio updates and monitors the currently engaged gear. In this way, the system improves upon prior systems that attempted to "count" to determine the currently engaged gear. Moreover, the system provides an operator with a shift intent switch that allows the operator to predict an upshift or a downshift as the next shift. The system calculates what the next expected gear will be based upon this indication. Once the next expected gear is known, the speed ratio at that gear is determined. Once the transmission is moved to neutral, the synchronization speed for the engine is then determined by multiplying the current transmission output speed with that next speed ratio. The engine control drives the engine speed to achieve synchronization speed ratio. The determination is updated as the transmission speed changes. The operator completes the shift with a manual stick shift.

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