F - Mech Eng,Light,Heat,Weapons – 02 – D
Patent
F - Mech Eng,Light,Heat,Weapons
02
D
123/7
F02D 9/02 (2006.01) F01L 1/44 (2006.01) F01L 3/20 (2006.01) F02B 29/02 (2006.01) F02M 25/07 (2006.01)
Patent
CA 2039459
An intake port pressure control system comprises an intake passage leading to a cylinder in an engine, and a check valve in the intake passage to allow fluid flow toward the cylinder and obstruct fluid back-flow in the reverse direction. A bypass port is located on the intake passage so that the bypass port communicates with a trapped volume defined by the portion of the intake passage between the check valve and intake valve. The intake port pressure control system further comprises a control valve having an outlet passage, a secondary passage, and an actuator enabling communication between the outlet passage and secondary passage. The actuator further enables active adjustment of the flow area of the flowpath between the secondary passage and outlet passage throughout a range of engine operating conditions. The outlet passage is connected to the bypass port, and the secondary passage is connected to a secondary air source. The control valve enables a controlled air flow therein from the secondary air source into the trapped volume when the intake valve is closed.
Davis Richard Stephen
Mac Farlane Glen Raymond
Wu Ko-Jen
General Motors Corporation
Gowling Lafleur Henderson Llp
LandOfFree
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