Vct system having closed loop control employing spool valve actuated by a stepper motor

Patent · Tue Jun 15 00:00:00 EDT 1993

OSTI ID:6215983

Quin, Jr, S B; Siemon, E C

An internal combustion engine is described comprising: a crankshaft, the crankshaft being rotable about an axis; a cam shaft, the cam shaft being rotatable about a second axis, the second axis being parallel to the axis, the cam shaft being subject to torque reversals during the rotation thereof; a vane, the vane having at least one lobe, the vane being attached to the cam shaft, being rotatable with the cam shaft and being non-oscillatable with respect to the cam shaft; a housing, the housing being rotatable with the cam shaft and being oscillatable with respect to the cam shaft, the housing having at least one recess, the recess receiving the lobe, the lobe being oscillatable within the recess; rotary movement transmitting means for transmitting rotary movement from the crankshaft to the housing; actuating means for varying the position of the housing relative to the cam shaft in reaction to torque reversals in the cam shaft, the actuating means comprising a stepper motor, a lead screw and a proportional spool valve, the position of the spool valve being controlled by the position of the lead screw driven by the stepper motor, the actuating means also delivering hydraulic fluid to the vane; and processing means for controlling the position of the actuating means.

• Assignee: Borg-Warner Automotive Transmission and Engine Components Corp., Sterling Heights, MI (United States)
• Patent Number(s): US 5218935; A
• Application Number: PPN: US 7-940273
• OSTI ID: 6215983
• Resource Relation: Patent File Date: 3 Sep 1992
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
INTERNAL COMBUSTION ENGINES
DESIGN
COMPUTERIZED CONTROL SYSTEMS
MECHANICAL SHAFTS
MECHANICAL TRANSMISSIONS
TORQUE
VALVES
VANES
CONTROL EQUIPMENT
CONTROL SYSTEMS
ENGINES
EQUIPMENT
FLOW REGULATORS
HEAT ENGINES
MACHINE PARTS
ON-LINE CONTROL SYSTEMS
ON-LINE SYSTEMS
SHAFTS
330603* - Vehicle Design Factors- Engine System