System and method for matching engine speed to vehicle speed...

Details System and method for matching engine speed to vehicle speed... System and method for matching engine speed to vehicle speed...

2006-03-06

2008-12-23

Lewis, Tisha D (Department: 3681)

Interrelated power delivery controls, including engine control

Transmission control

With clutch control

C477S110000, C701S054000, C701S058000

Reexamination Certificate

active

07468018

ABSTRACT:
A method of automatically matching engine speed to vehicle speed while a manual transmission is shifted. The currently selected speed ratio is determined from the ratio of engine speed and vehicle speed. The operator initiates a shift by disengaging the clutch. The operator's throttle inputs before and after clutch disengagement imply whether he wishes an upshift of one speed ratio or a downshift of one or two speed ratios. While the clutch is disengaged, the engine computer acts to bring the engine to the speed needed for smooth reengagement of the clutch. Engine speed control returns to the operator upon clutch engagement.

REFERENCES:
patent: 4740898 (1988-04-01), McKee et al.
patent: 5389051 (1995-02-01), Hirate et al.
patent: 5680307 (1997-10-01), Issa et al.
patent: 5681240 (1997-10-01), Sunada et al.
patent: 5916292 (1999-06-01), Issa et al.

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