Engine control device for working vehicle
US8315783B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2008 |
| Grant date | Nov 20, 2012 |
| Priority date | — |
| Expiry date | Dec 7, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2059/467
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
There are provided: a pedal operation amount detection unit 12 that detects an operation amount s of the accelerator pedal 11; a speed ratio detection unit 14, 15 that detects a speed ratio e of an input shaft and an output shaft of the torque converter 2; a load pressure detection unit 16 that detects a load pressure P of the hydraulic pump 6; a speed stage detection unit 18 that detects a low speed stage of a transmission 3 capable of varying a speed stage between a low speed stage and a high speed stage; and a speed limiting unit 10 that limits a maximum speed of the engine 1 to a lower speed upon satisfaction of following speed limitation conditions: at least a pedal operation amount s is equal to or greater than a predetermined value s1, a speed ratio e is equal to or less than a predetermined value ea, a load pressure P is equal to or greater than a predetermined value Pa, and the low speed stage of the transmission has been detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.