Internal-combustion engines – Multiple cylinder
Patent
1990-03-21
1990-12-18
Okonsky, David A.
Internal-combustion engines
Multiple cylinder
123403, F02M 3510
Patent
active
049778668
ABSTRACT:
A movable wall member is mounted in the intake runner of an internal combustion engine manifold and connected to an actuator plate in the manifold plenum which moves the wall member in a longitudinal direction to increase the effective runner length. A rigid link or end panel is pivotally connected to the other end of the wall member and to the associated runner wall so that longitudinal movement of the wall member results in simultaneous transverse movement thereby reducing the effective cross-sectional flow area of the runner passage. The movable wall members of multiple runner passages are connected to a common actuator plate in the manifold plenum which reduces the effective plenum volume upon displacement of the actuator plate. Movement of the actuator may be controlled as a function of variations in intake manifold vacuum pressure so as to simultaneously decrease the effective runner cross-sectional flow area and plenum volume and to increase the effective runner length upon increased manifold vacuum pressure.
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Cross, Jr. Harry M.
Okonsky David A.
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