Engine output control via auto selection of engine output curve

Details Engine output control via auto selection of engine output curve Engine output control via auto selection of engine output curve

2007-08-22

2010-02-16

Tran, Khoi (Department: 3664)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Construction or agricultural-type vehicle

C701S001000, C701S051000, C701S054000, C701S084000, C180S014100, C180S054100, C318S003000, C318S432000, C318S434000

Reexamination Certificate

active

07664586

ABSTRACT:
An engine output controller provided in a bulldozer includes an output curve storage device storing a plurality of output curves of an engine and an output curve changing device selecting and shifting to one of the plurality of output curves. The output curve changing device, when a pressure of a blade tilt cylinder is equal to or more than a predetermined value, calls and shifts to a higher output curve from the output curve storage device. When an oil pressure is supplied to the tilt cylinder to tilt a blade and an operation is performed without reducing a soil pressing speed in this condition, the output curve changing device shifts the current output curve to the higher output curve to drive the engine. However, in many other cases, the output curve is automatically switched to a lower output curve to reduce an output of the engine. Thus, the fuel consumption is improved.

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