VEHICLE BRAKING PRESSURE SOURCE DEVICE WHEREIN FLUID COMMUNICATION BETWEEN PRESSURIZING AND BACK-PRESSURE CHAMBERS OF MASTER CYLINDER IS CONTROLLED BASED ON VEHICLE RUNNING STATE AND/OR ROAD SURFACE CONDITION
US6431662B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 2001 |
| Grant date | Aug 13, 2002 |
| Priority date | — |
| Expiry date | Feb 8, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/662
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A vehicle braking pressure source device including (a) a master cylinder having a pressurizing piston cooperating with a cylinder housing to define a pressurizing chamber and a back-pressure chamber on front and rear sides of the piston, and an input rod which slidably extending through a rear end wall of the cylinder housing such that the piston is advanced by a brake operating force of a brake operating member transmitted thereto through the input rod, to pressurize a working fluid in the pressurizing chamber, (b) a communication passage for communication between the pressurizing and back-pressure chambers, (c) a control valve device disposed in the communication passage for controlling the communication between the pressurizing and back-pressure chambers through the communication passage, and (d) a control valve control device for controlling the control valve device, on the basis of at least one of an operating state of the brake operating member, a running state of the vehicle and a state of a road surface on which the vehicle is running.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.