Outdoor power equipment unit with condition responsive electronic control of traction drive system
US8880300B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2012 |
| Grant date | Nov 4, 2014 |
| Priority date | — |
| Expiry date | Jun 4, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2059/6838
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An outdoor power equipment unit comprises a self-propelled mower having a hydraulic traction drive system. When engine load exceeds a predetermined percentage of full load, a controller automatically reduces the stroke of a variable displacement pump in the traction drive system to reduce the ground speed of the mower without the operator having to change the position of the traction pedal. This reduces engine load to enhance continued good cutting performance. At any time, the controller can take the same actions to reduce ground speed if an excessively high temperature in a fluid used in a cooling system on the mower is detected, or if excessive loads on the mower decks of the mower are detected, or both.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.