Engine output control via auto selection of engine output curve
US7664586B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2007 |
| Grant date | Feb 16, 2010 |
| Priority date | — |
| Expiry date | Nov 23, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/2422
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.