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Engine and motorcycle engine

An engine and one-way valve technology, which is applied to engine components, combustion engines, machines/engines, etc., can solve the problems of increasing the number of parts and increasing manufacturing costs, and achieve the effect of low manufacturing costs

Active Publication Date: 2009-01-28
YAMAHA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the number of parts increases, leading to an increase in manufacturing cost

Method used

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  • Engine and motorcycle engine
  • Engine and motorcycle engine
  • Engine and motorcycle engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] Below, will refer to Figures 1 to 6 Embodiments of the engine according to the present invention are described in detail.

[0044] figure 1 is an enlarged side view of the cylinder and intake system of the engine according to the present invention. figure 2 is a vertical sectional view of a cylinder head and part of a cylinder block. image 3 A perspective view of the air volume control valve and intake pipe provided on the cylinder head when viewed from the cylinder block side. Figure 4 is a front view of the cylinder head when viewed from the front of the vehicle body. Figure 5 It is a plan view of the cylinder head with the intake pipe removed. Figure 6 is part of the air volume control valve and cylinder head along the Figure 5 Sectional view of line VI-VI in.

[0045] In these figures, reference numeral 1 denotes an engine according to the present embodiment. Engine 1 is a water-cooled, single-cylinder, four-stroke engine for motorcycles. Such as fig...

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PUM

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Abstract

This invention provides an engine and a motorbike engine, wherein the number of pipe for secondary air supply device is reduced to reduce the manufacturing cost. The engine comprises a cylinder body (3), a cylinder cover (5), and a secondary air passage connected to an exhaust passage (22). An air volume control valve (31) and a spring valve (48) are provided in the secondary air passage. The air volume control valve (31) and a one-way valve (48) are provided on the cylinder cover (5). A section of the secondary air passage on the downstream side of the air volume control valve (31) and the one-way valve (48) is formed by passage holes (35, 36) drilled in the cylinder cover (5).

Description

technical field [0001] The present invention relates to an engine, such as a motorcycle engine, in which secondary air is introduced into an exhaust passage via an air volume control valve. Background technique [0002] For example, Patent Document 1 describes a known engine of this type. The engine disclosed in Patent Document 1 is a water-cooled, single-cylinder, four-stroke engine for motorcycles, which has cylinders oriented substantially in the forward direction of the vehicle body. [0003] This cylinder includes a cylinder block attached to the front end of the crankcase and a cylinder head attached to the front end of the cylinder block. The intake pipe is attached to the upper part of the cylinder head, and the exhaust pipe is attached to the lower part of the cylinder head. [0004] The engine described in Patent Document 1 is provided with a secondary air supply device for introducing secondary air to the exhaust passage. The secondary air supply device include...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/30
CPCF01N3/30F01N2590/04F01N3/34F02F1/24Y02T10/20Y02T10/12
Inventor 增田辰哉齐藤道夫
Owner YAMAHA MOTOR CO LTD
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