| 摘要 |
Conventional fluid control circuits for brakes and the like normally comprise a control valve interconnected between a pressurized fluid source and the brakes for selectively actuating the same. A problem arises in that upon starting of the vehicle during cold weather conditions, the hydraulic fluid is not sufficiently warm to ensure efficient brake operation. This invention includes conduits (36) for sequentially communicating fluid from a fluid source (11), through an actuating chamber (14) of a brake (15), and to a control valve (25) in series when the brake (15) is either in its disengaged or engaged condition of operation. Furthermore, upon actuation of the valve (25), an operator is enabled to detect by "feel" the degree of brake engagement. |
