Engine control system

Details Engine control system Engine control system

2008-04-01

2008-04-01

Lewis, Tisha (Department: 3681)

Interrelated power delivery controls, including engine control

Transmission control

Engine controlled by transmission

C477S115000

Reexamination Certificate

active

11262841

ABSTRACT:
In an engine control system mounted on a machine such as a walk-behind truck through a CVT and having an actuator whose operation is controlled such that a detected engine speed becomes equal to a desired engine speed, the output of the engine is estimated based on the detected engine speed and a detected throttle opening, the desired engine speed is changed when the estimated engine output is greater or smaller than output threshold values, and a speed reduction ratio of the CVT is also changed based on the detected engine speed such that a detected speed of the CVT output shaft speed becomes equal to a desired output shaft speed, thereby enabling to reduce the fuel consumption and noise of the engine.

REFERENCES:
patent: 4951468 (1990-08-01), Sasajima et al.
patent: 6616563 (2003-09-01), Inoue et al.
patent: 7085645 (2006-08-01), Matsuda et al.
patent: 62168737 (1987-07-01), None
patent: 3-7555 (1991-02-01), None
patent: 06-056398 (1994-03-01), None
patent: 07-197829 (1995-08-01), None

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