Caterpillar Inc.

Ching W Jaw

Dana Ray Coldren

Charles D Ellenbecker

Matthew S Touvelle

A cartridge control valve includes a valve body that defines an inlet passage separated from an outlet passage by a flat valve seat. A solenoid is attached to the valve body. A valve member has one end positioned in the valve body and an other end attached to the solenoid. The valve member has an annular knife edge valve surface located between the one end and the other end. The valve member is moveable from a first position to a second position by energizing the solenoid. The annular knife edge surface is away from the flat valve seat to open the inlet passage to the outlet passage when the valve member is in one of its first position and its second position. The annular knife edge valve surface is seated against the flat valve seat to close the inlet passage to the outlet passage when the valve member is in the other of its first position and its second position.

Cartridge control valve with top mounted solenoid and flat valve seat

A control valve, preferably for use with a fuel injector, includes a valve body defining an inlet passage separated from an outlet passage by a valve seat. A solenoid is attached to the valve body, and includes a coil and an armature. A portion of the armature is a permanent magnet. The polarity of the permanent magnet is oriented such that the armature is pushed away from the coil when the solenoid is energized. A valve member is positioned in the valve body and attached to the armature. The valve member is moveable between an open position in which the inlet passage is open to the outlet passage, and a closed position in which the inlet passage is closed to the outlet passage.

Control valve having a solenoid with a permanent magnet for a fuel

A control valve, preferably for use in a fuel injector, includes a valve body defining an inlet passage separated from an outlet passage by a valve seat. A single pole solenoid is attached to the valve body, and includes a pole piece and an armature. A valve member with a centerline is positioned in the valve body, attached to the armature and moveable between an open position in which the inlet passage is open to the outlet passage, and a closed position in which the inlet passage is closed to the outlet passage. The pole piece is positioned between the valve seat and the armature along the centerline of the valve member.

Control valve having a top mounted single pole solenoid for a fuel

A control valve includes a first valve body component that defines an outlet passage and a first planar surface surrounding a valve seat. A second valve body component has a second planar surface and is fastened against the first valve body component with the second planar surface in contact with the first planar surface at a sealing land. The first valve body component and the second valve body component define a high pressure cavity surrounded by the sealing land. One of the first valve body component and the second valve body component define an inlet passage opening to the high pressure cavity. A valve member has a portion positioned in the high pressure cavity and is moveable between a closed position in which the valve member contacts the valve seat closing the outlet passage to the high pressure cavity, and an open position in which the outlet passage is open to the high pressure cavity. The sealing land has a symmetrical non-circular shape.

High pressure metal to metal sealing land in a control valve for a fuel

A control valve, preferably for use with a fuel injector, includes a valve body defining a solenoid cavity, an inlet passage, an outlet passage and a metering passage extending between the solenoid cavity and the outlet passage. A solenoid is mounted in the solenoid cavity. A valve member has one end attached to the solenoid and is positioned to reciprocate in the valve body between an open position in which the inlet passage is opened to the outlet passage and a closed position in which the inlet passage is closed to the outlet passage. The inlet passage is in fluid communication with the solenoid cavity via the metering passage when the valve member is in its open position. Appropriate sizing of the metering passage can prevent secondary injections by providing adequate pressure relief to the solenoid cavity while also substantially damping any pressure waves that may travel to the solenoid cavity through the metering passage.

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Phoenix, AZ, United States of America

Ching W Jaw