Variable operating valve mechanism of internal combustion engine
A valve train, internal combustion engine technology, applied in the direction of machine/engine, mechanical equipment, engine components, etc., can solve problems such as errors
Active Publication Date: 2012-05-30
MITSUBISHI MOTORS CORP
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Problems solved by technology
[0025] Due to this error, the cam displacement transmitted to the valve driven by the variable valve mechanism will have an error relative to the originally set cam displacement.
Method used
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Embodiment Construction
[0053] currently in use Figure 1 ~ Figure 3 A variable valve train for an internal combustion engine according to a first embodiment of the present invention will be described. figure 1 It is a sectional view showing the engine 10 having the variable valve mechanism 50 . Such as figure 1 As shown, engine 10 is, for example, a reciprocating engine having a plurality of cylinders arranged in-line with each other. The engine 10 has a cylinder block 11, a cylinder head 12, and the like.
[0054] Combustion chambers 18 are formed on the cylinder head 12 corresponding to the cylinders 17 formed on the cylinder block 11 . In the combustion chamber 18, for example, a pair of intake ports 18a and a pair of exhaust ports 18b are formed. In addition, the cylinder head 12 is provided with an intake valve 19 a for opening and closing each intake port 18 a and an exhaust valve 19 b for opening and closing each exhaust port 18 b. These intake valves 19a and exhaust valves 19b are of a ...
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A variable valve mechanism for an internal combustion engine is disclosed, including a cam shaft, a cam, a rocker arm, a swing cam and a transmission member. The rocker arm includes an inner ring, an outer ring provided coaxially with the inner ring and containing the inner ring at inner side, and a plurality of rolling elements accommodated between the inner ring and the outer ring and supporting the outer ring to smoothly rotate relative to the inner ring; the outer ring includes a rolling type roller component which is in rolling contact with the swing cam and is displaced by the swing cam, in a transfer path where displacement of the cam is transferred to the swing cam, at least one of a first transmission part, in which the displacement of the cam is transmitted from the cam to the transmission component, and a second transmission part, in which the displacement of the cam is transmitted from the transmission component to the swing cam, includes a sliding roller component, the sliding roller component transfers the displacement on the outer circumference and supports on a support part in a manner of smooth rotation and forms a sliding bearing mechanism with the support part.
Description
technical field [0001] The present invention relates to a variable valve train for an internal combustion engine that varies the phase of an intake valve or an exhaust valve. Background technique [0002] From the standpoint of dealing with engine exhaust gas, etc., the variable valve mechanism of the engine mounted on the car is often configured to adjust the opening and closing timing and opening period of the intake valve and exhaust valve. [0003] As an example of this variable valve mechanism structure, for example, a structure has been proposed in which the displacement of the cam lift of the cam provided on the camshaft is transmitted to the base circle interval and the center rocker arm as a transmission member. The reciprocating oscillating cams connected in the lift ranges use the rocker arms driven by the oscillating cams to drive intake valves and exhaust valves. [0004] The attitude of the center rocker is adjusted by an actuator, for example. When the postu...
Claims
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IPC IPC(8): F01L13/00
Inventor 田边干雄中井英雄吉川智
Owner MITSUBISHI MOTORS CORP