Variable valve gear for engine
A technology for engine valves and engines, which is applied to valve devices, engine components, combustion engines, etc., can solve problems such as increased number of parts, offset of joints, increased offset, etc., to achieve reduced number of parts, reduced size management, The effect of easy processing
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Embodiment 1）
[0054] Below, refer to Figure 1~Figure 12 Example 1 of the present invention will be described. First, in figure 1 and figure 2 Among them, the engine body 10 of this engine is, for example, an engine mounted on a motorcycle, and the engine body 10 combines a crankcase 11, a cylinder block 12, a cylinder head 13, and a head cover 14 as a plurality of engine body components. The cylinder block 12 has a cylinder bore 16 in which the piston 15 is slidably fitted and is combined with the crankcase 11, and a cylinder head facing a combustion chamber 17 at the top of the piston 15 is formed between the cylinder block 12 and the cylinder block 12. 13 is combined with the cylinder body 12, and from the side opposite to the cylinder body 12, the head cover 14 is combined with the cylinder head 13.
[0055] The cylinder head 13 is provided with an air inlet 18 open to one side thereof and an exhaust port 19 opened toward the other side of the cylinder head 13 to form an air intake ...
Embodiment 2）
[0112] refer to Figure 13and Figure 14 Example 2 of the present invention will be described. Portions corresponding to those in Embodiment 1 are shown with the same reference numerals, and detailed descriptions are omitted.
[0113] The movable valve mechanism 29B has: a camshaft 32, which is arranged between the intake valve 24 and the exhaust valve 25, and is provided with an intake cam 30 and an exhaust cam 31; The cam profile of the air cam 31 is installed on the outer periphery of the camshaft 32 in a manner that is movable in the axial direction but not relatively rotatable; a decompression mechanism 34 is used to clamp the exhaust cam 31 between it and the The sliding cam 33 is mounted on the camshaft 32; the intake side and exhaust side rocker shafts 36, 37 have axes parallel to the camshaft 32 and are supported by the cylinder head 13; the intake side The rocker arm 38 is driven by the intake cam 30 to drive the intake valve 24 to open and close and is swayably s...
Embodiment 3）
[0124] refer to Figure 15 Embodiment 3 of the present invention will be described. Portions corresponding to Embodiment 1 and Embodiment 2 are denoted by the same reference numerals and shown, and detailed description thereof will be omitted.
[0125] The engine main body 108 of this engine is mounted on a motorcycle, for example. The engine body 108 is constructed by combining the crankcase 11 (refer to Embodiment 1), the cylinder block 12, the cylinder head 109 and the head cover 110 as a plurality of engine body components. The combined cylinder bore 16 is combined with the crankcase 11, the cylinder head 109 is combined with the cylinder block 12 to form a combustion chamber 17 facing the top of the piston 15 between it and the cylinder block 12, and the head cover 110 is separated from the cylinder block 12. The opposite side of the cylinder body 12 is combined with a cylinder head 109 .
[0126] A valve mechanism 29A accommodated in a valve chamber 28 formed between ...
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