Method of controlling vehicle hydraulic brake system
US6522966B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 9, 2001 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Apr 9, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/686
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method of controlling a pump-driven type vehicle hydraulic brake system which can suppress pulsation of brake hydraulic pressure and makes it possible to accurately and quickly apply brake hydraulic pressure is provided. Using an equation between the pressure rising speed of the hydraulic pressure in the master cylinder and the approximate required driving force of the motor, the driving force of the motor is set from the pressure rising speed of the detected hydraulic pressure. The driving force of the motor is controlled to minimize the hydraulic pressure difference between the brake hydraulic pressure increased by the preset driving force and the hydraulic pressure in the master cylinder, thereby bringing the brake hydraulic pressure substantially close to the hydraulic pressure in the master cylinder. Only for the remaining hydraulic pressure difference, the motor driving force is controlled with a small control output to quickly and precisely apply brake hydraulic pressure while suppressing pulsation of the brake hydraulic pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.