Patent ID: 8584707

Claim:
A dosing manifold assembly comprising: a manifold body comprising a supply passage, an output passage, and a return passage; a first valve assembly connected to the manifold body, the first valve assembly comprising: a valve body including: a supply port in fluid communication with the supply passage; a first chamber; a second chamber in fluid communication with the first chamber; a first valve seat, and; a control port in fluid communication with the output passage; an armature positioned at least partially in the first chamber, wherein the armature is configured to seal against the first valve seat when the first valve assembly is closed, and to move away from the first valve seat to allow fluid to pass through the control port and to the output passage when the first valve assembly is open; and a valve device positioned in the second chamber, and having a moveable portion positioned adjacent to the supply port to selectively admit fluid into the second chamber and past the first valve seat when the first valve assembly is open; wherein the valve body further defines at least one orifice between the supply port and the first valve seat, the orifice being in fluid communication with the return passage and configured for venting fluid that leaks past the valve device to the return passage when the first valve assembly is closed; the first valve assembly further comprises: a magnetic sleeve disposed within the valve body, wherein the armature is adapted to move in conjunction with the magnetic sleeve and positioned substantially within the first chamber; a solenoid coil that can be energized to generate a magnetic field sufficient for moving the magnetic sleeve and armature into one of an open and a closed position; and a resilient member that biases the armature against the first valve seat when the first valve assembly is closed; wherein the output passage is configured to output fluid from the first valve assembly to a hydraulic component external to the manifold body; and the manifold body further comprises a detection passage configured to receive fluid from the hydraulic component external to the manifold body.