Valve operation changing system of internal combustion engine

Patent · Tue Apr 29 04:00:00 EDT 1986

OSTI ID:5758552

Aoyama, S; Kato, M

A valve operation changing system is described of an internal combustion engine which consists of: first and second cams formed on a camshaft and different in cam profile from each other; a rocker arm mounted on a rocker shaft and swingable around the rocker shaft to operate an engine valve upon engagement with the cams, the rocker arm being axially movable to engage with the first cam when the rocker arm is put in a first position while with the second cam when the rocker arm is put in a second position; and means for selectively putting the rocker arm in one of the first and second positions in accordance with an engine operating condition, the putting means including an oil pressure source for supplying pressurized hydraulic oil, a flow direction changing valve fluidly connected to the oil pressure source and arranged to selectively take one of its first and second states, means defining first and second hydraulic pressure chambers.

• Assignee: Nissan Motor Co., Ltd., Yokohama
• Patent Number(s): US 4584974
• OSTI ID: 5758552
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUIDS
HEAT ENGINES
HYDRAULIC FLUIDS
INTERNAL COMBUSTION ENGINES
LUBRICANTS
LUBRICATING OILS
MACHINE PARTS
MOTION
OILS
OPERATION
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
POSITIONING
PRESSURIZING
ROTATION
SHAFTS
VALVES
WORKING FLUIDS