| 摘要 |
A three-state magnet valve for control of fluid flow engageable with a source of fluid pressure for connecting the three-state magnet valve to a source of fluid pressure. The three-state magnet valve also has an application pilot solenoid valve having a fluid connection to a source of fluid pressure and is electrically connectable to a control module. The three-state magnet valve further has an application solenoid valve having a fluid connection to a source of fluid pressure and to an application pilot solenoid valve and a braking device. The application solenoid valve is also electrically connectable to a control module. The application solenoid valve is able to initiate a braking application upon receipt of a fluid signal from the application pilot solenoid valve and an electrical signal from a control module. The three-state magnet valve further has a release pilot solenoid valve having a fluid connection to a source of fluid pressure and to the application solenoid valve and is electrically connectable to a control module. The three-state magnet valve also has a release solenoid valve having a fluid connection to an exhaust to atmosphere and to the application solenoid valve and to the release pilot solenoid valve and to a braking device. The release solenoid valve is electrically connectable to a control module. The release solenoid valve is able to exhaust fluid pressure to atmosphere upon receipt of a fluid pressure signal from the release pilot solenoid valve and an electrical signal from a control module thereby exhausting fluid pressure from said braking device.
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