Fev Motorentechnik Gmbh & Co. Kommanditgesellschaft

Stackpole International Engineered Products, Ltd.

Manfred Arnold

Ralph Valkenberg

Hans Peter Kutzer

Michael Schebitz

Armin Zoschke

Franz Fischinger

Hermann-Josef Ecker

A variable displacement vane pump has a control slide displaceable within its housing and a first control chamber and a second control chamber for receiving pressurized lubricant. A thermally adjustable control valve is provided in the housing for adjusting pump displacement based on a temperature of the lubricant. In addition to fluid communication channels in the control chambers, at least one vent port is provided in the second chamber. The control valve is configured to control pressure and fluid communication between the chambers along with the control slide. The control valve can help reduce pump displacement at lower temperatures and low engine speeds. At lower temperatures, the second control chamber can be pressurized by the first control chamber. At higher temperatures, the second control chamber can be vented through the control valve and/or the vent port, despite the position of the control slide.

Variable displacement vane pump with thermo-compensation

Engine brake device for a commercial vehicle

In an internal combustion engine there is provided a cylinder head; a plurality of cylinder head bolts for securing the cylinder head to a cylinder block; at least one engine cylinder; at least two intake valves and two exhaust valves controlling the flow of gases into and from the engine cylinder. A plane defined by the intake valves and a plane defined by the exhaust valves extend at an angle of between 0.degree. and 15.degree. to one another and have an inclined orientation to the longitudinal engine axis. An overhead camshaft extends parallel to the engine axis and is situated in a zone bounded by the cylinder head bolts. Respective valve bridges interconnect the intake valves with one another and the exhaust valves with one another, and rocker arms connect respective cams of the camshaft with the valve bridges, whereby the intake valves are simultaneously operated by one cam and the exhaust valves are simultaneously operated by another cam.

Arrangement of valves and valve drives in an internal combuston engine

Growing community of inventors

Aachen, Germany

Manfred Arnold