Driving power control apparatus for four wheel drive vehicle
US8195348B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 18, 2007 |
| Grant date | Jun 5, 2012 |
| Priority date | — |
| Expiry date | Sep 14, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/84
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Front left and right wheel units are driven by an engine and a motor generator. Rear left and right wheel units are independently driven by in-wheel motor type motor generators. The motor generator and the motor generator are configured to have different rated outputs, respectively, and be subjected to different speed reduction ratios, respectively, between the motor generators and their respectively associated drive wheel units, and thus have characteristics, respectively, in efficiency with respect to torque and vehicular speed, that exhibit high efficiency in mutually different output ranges, respectively. When a mileage oriented mode is selected as a traveling mode, an ECU determines how a drive torque should be allocated between the motor generators, as based on the motors' required drive torque and vehicular speed and on each motor generator's characteristic in efficiency, to maximize the motor generators' total efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.