摘要:
The present invention refers to a valve drive mechanism for an engine, wherein a valve open period is set to have a main open period, in which the valve is open in a suction or in an exhaust stroke, and a sub open period, in which the valve is open in an expansion or in a compression stroke in a specific operation range, and wherein during the sub open period in the expansion stroke, outflow of part of combustion gas or unburned gas into the intake system is allowed, and/or during the sub open period in the compression stroke, outflow of part of mixture into the exhaust system is allowed.
摘要:
The present invention relates to a continuously variable type valve driving device for an engine, said engine having a valve for opening or closing an opening of a port to a combustion chamber; the continuously variable type valve driving device comprising: a valve driving member for opening or closing the valve; a drive shaft for driving the valve driving member; and a valve working angle variable mechanism for continuously changing a working angle of the valve, corresponding to an operation state of the engine, by changing a state of driving force transmission from the drive shaft to the valve driving member, and a valve clearance variable mechanism, in which a valve clearance in case that a working angle of the valve is large, and a valve clearance in case that a working angle of the valve is small are set to different values.
摘要:
A rocking cam includes a cam surface having a base circle portion and a lift portion, and is disposed so as to make reciprocating motion, in which a width of a contact surface of the base circle portion is formed smaller than a width of a contact surface of the lift portion.
摘要:
Internal combustion engine comprising intake and/or exhaust valves (32,37) being disposed in a cylinder, each intake or exhaust valve being drivably connected to a valve drive member through a valve lift member, wherein a rotation prevention means is provided in conjunction with the valve lift member of at least one of the intake or exhaust valves.
摘要:
A motorcycle includes an air inlet pipe (26), an airflow box (27), an air cleaner box (8), and a throttle body as an air passage arranged to allow outside air to be taken into the engine (7). The air inlet pipe (26) is provided in a front portion of a main frame (1). The air inlet pipe (26) is provided with an airflow sensor (621) and a throttle valve (622). An air cleaner element (611) is provided between the airflow sensor (621) and the engine (7).
摘要:
An oscillating cam provided with a cam face having a base circle part and a lift part and disposed to perform reciprocating operation in which the contact surface of the a base circle part is formed narrower than the contact surface of the lift part.
摘要:
A motorcycle includes an air inlet pipe (26), an airflow box (27), an air cleaner box (8), and a throttle body as an air passage arranged to allow outside air to be taken into the engine (7). The air inlet pipe (26) is provided in a front portion of a main frame (1). The air inlet pipe (26) is provided with an airflow sensor (621) and a throttle valve (622). An air cleaner element (611) is provided between the airflow sensor (621) and the engine (7).
摘要:
The present invention relates to a continuously variable type valve driving device for an engine, said engine having a valve for opening or closing an opening of a port to a combustion chamber; the continuously variable type valve driving device comprising: a valve driving member for opening or closing the valve; a drive shaft for driving the valve driving member; and a valve working angle variable mechanism for continuously changing a working angle of the valve, corresponding to an operation state of the engine, by changing a state of driving force transmission from the drive shaft to the valve driving member, and a valve clearance variable mechanism, in which a valve clearance in case that a working angle of the valve is large, and a valve clearance in case that a working angle of the valve is small are set to different values.