Interactive process during engine idle stop mode
US6730000B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2002 |
| Grant date | May 4, 2004 |
| Priority date | — |
| Expiry date | Dec 20, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2312/14
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A process for regulating stopping of an engine during a typical traffic idling event in order to reduce fuel consumption. There is an interactive process between the engine and the transmission involving shutting down the engine when the driver has braked to a stop and restarting upon release of brake pressure. The transmission input elements are clamped during the engine shut down to minimize transient torque disturbance and the vehicle is restarted when motion is detected. The process involves pressurizing of first gear friction elements during the stop period using an auxiliary pump so that the transmission will be ready to transmit torque on restart. Restart surge is avoided by transmitting a limited amount of torque in a controlled manner during a restart.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.