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Aerating device for internal combustion engine

A ventilation device and internal combustion engine technology, applied in the direction of mechanical equipment, engine components, crankcase ventilation, etc., can solve problems such as the complexity of the camshaft drive mechanism and the enlargement of the periphery of the cylinder block, so as to improve ventilation performance, reduce condensation, and promote The effect of gas-liquid separation

Inactive Publication Date: 2008-08-13
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Offsetting the cam chain in this way complicates the camshaft drive mechanism and enlarges the periphery of the cylinder block of the internal combustion engine.

Method used

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  • Aerating device for internal combustion engine
  • Aerating device for internal combustion engine
  • Aerating device for internal combustion engine

Examples

Experimental program
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Effect test

Embodiment Construction

[0027] FIG. 1 is a side view of a motorcycle 2 equipped with an air-cooled internal combustion engine 1 according to an embodiment of the present invention. The direction indicated by the arrow F is the front (the same in the following figures). The main frame 4 and the lower frame 5 are connected to the head pipe 3 of the two-wheeled motorcycle 2, and extend rearward and downward respectively. The internal combustion engine 1 is suspended on these vehicle frames, and the front fork 6 is rotatably supported on the head pipe 3. A steering handle 7 is attached to the upper end of the front fork 6, and a front wheel 8 is pivotally supported on the lower end. The front end of the rear fork 9 is pivotally supported on the rear of the main frame 4, and can swing up and down. The rear wheel 10 is pivotally supported on the rear end of the rear fork 9 . The rear wheel 10 is driven by a rear wheel drive chain 13 wound around a rear wheel drive sprocket 11 mounted on the shaft end of ...

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Abstract

The present invention provides a ventilation device for an overhead valve type internal combustion engine. The internal combustion engine has a cam chain wound between the crankshaft and the camshaft and is provided with a cam chain tensioner. In the above internal combustion engine, the cam chain is not used to drive the pulley The breather is provided without offsetting the size of the cylinder block. A cam chain tensioner push rod installation support surface is formed on the outer wall of the cylinder block, and on the side of the cam chain tensioner push rod installation support surface, on the cylinder outer wall located in parallel with the above support surface, a The recessed portion which becomes a part of the breather chamber which separates the gas-liquid separation of the blow-by gas discharged from the inside of the internal combustion engine and the joint surface which attaches the cover part of the breather chamber.

Description

technical field [0001] The invention relates to a ventilation device arranged on an internal combustion engine. Background technique [0002] In a four-cycle internal combustion engine, there are cases where the internal pressure of the crank chamber rises as the temperature of the engine rises, the internal pressure of the crank chamber rises when the piston descends, and a small amount of blow-by gas leaks from the gap between the piston and the cylinder. leakage into the crankcase. Therefore, it is necessary to provide a breather to discharge the blow-by gas to the outside. Since the fuel is sealed in the crank chamber and stirred violently, the fuel particles are scattered and filled the crank chamber. Therefore, in the process of discharging the blow-by gas to the outside, the exhaust gas first enters the breather chamber with an appropriate volume, through decompression and Reduce the flow rate to separate and recycle the fuel components. [0003] In conventional te...

Claims

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Application Information

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IPC IPC(8): F01M13/00F01M13/04
Inventor 安藤顺二
Owner HONDA MOTOR CO LTD
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