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Variable valve transmission device of internal combustion engine

A transmission device and internal combustion engine technology, applied in the direction of valve devices, machines/engines, mechanical equipment, etc., can solve the problems of solenoid overheating, layout freedom limitation, etc., to ensure the layout freedom, suppress temperature rise, prevent The effect of upsizing

Inactive Publication Date: 2015-04-29
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Therefore, when the solenoid bolts are fastened to the cylinder head and the bolt mounting portion of the side wall of the cylinder head cover and mounted, the heat of the cylinder head is conducted to the solenoid without restraint, and the solenoid itself Heat is also generated due to work, resulting in overheating of the solenoid
[0010] Therefore, if a cooling mechanism such as a heat sink is installed on the solenoid, or the solenoid is separated from the cylinder head so as to be far away from the heat source, the degree of freedom of layout is limited, and the size of the internal combustion engine is increased.

Method used

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  • Variable valve transmission device of internal combustion engine
  • Variable valve transmission device of internal combustion engine
  • Variable valve transmission device of internal combustion engine

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Embodiment Construction

[0085] Below, refer to Figure 1 to Figure 8 , one embodiment of the present invention will be described.

[0086] The internal combustion engine 1 related to the present embodiment is a single-cylinder air-cooled 4-stroke cycle internal combustion engine mounted on a small vehicle such as a motorcycle, and the cylinder block 3 and the cylinder head 4 are sequentially stacked from bottom to top and integrally fastened on a not-shown On the crankcase shown, the cylinder head cover 5 covers the top of the cylinder head 4.

[0087] Cylinder block 3, cylinder head 4, and cylinder head cover 5 lean forward slightly forward and stand upward (refer to figure 1 ).

[0088] refer to figure 1 and figure 2 , the cylinder block 3 is provided with a cylinder liner 12 that fits the piston 11 into a reciprocating free movement, and the cylinder head 4 is fastened to the cylinder block in such a way that the combustion chamber 13 facing the top surface of the piston 11 is formed between ...

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Abstract

The invention provides a variable valve transmission device of an internal combustion engine, which can inhibit heat conduction from a cylinder cover to an actuator even though the actuator is mounted on the cylinder cover, and can ensure the layout freedom degree, and thus prevent maximization of the internal combustion engine. An actuator (45) which enables the attachment / detachment of adjacent rocker arms (31, 32) by advance and retreat of a connecting pin (42) is mounted through more than one actuator mounting parts (55f, 55b, 55d) disposed on an external surface of a side wall (51R) of a cylinder cover (4), and lubricant passage ways (P1, P2, P3) are formed near the actuator mounting parts (55f, 55b, 55d) in the side wall (51R) of the cylinder cover (4).

Description

technical field [0001] The present invention relates to a variable valve train for an internal combustion engine operated by an actuator. Background technique [0002] Patent Document 1 discloses a variable valve train for an internal combustion engine that interlocks or disengages a first intake valve and a second intake valve by the operation of a solenoid mounted on a cylinder head. [0003] 【Prior technical literature】 [0004] 【Patent Literature】 [0005] [Patent Document 1] Japanese Patent Laid-Open No. 2010-156237 [0006] In Patent Document 1, a driven sprocket that transmits power through a cam chain is fixed to the end of the camshaft that is supported on the cylinder head, and the cylinder head and the cylinder head cover that face the driven sprocket The solenoid is fixed on the side wall from the outside. [0007] The solenoid is installed between the joint surface of the cylinder head and the cylinder head cover at a position where the output shaft and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L1/34F01L1/12F01M9/10F02F1/40
Inventor 片冈大藤久保诚
Owner HONDA MOTOR CO LTD