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Secondary air feeding system using for exaust of forced air-cooling engine

A secondary air and forced air cooling technology, which is applied to the cooling of engines, engine components, combustion engines, etc., can solve the problems of difficult compact layout, complex structure, large secondary air supply system, etc., and achieve simplified forming and compact cylinder head , Reduce the effect of thermal influence

Inactive Publication Date: 2005-02-02
SUZUKI MOTOR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, according to this general structure, the duct 150 for secondary air supply and the hoses 130 and 140 are arranged around the exhaust structure of the cylinder head indicated by 160, making the structure complicated.
[0005] Also, since the secondary air valve 120 is integrally formed of the on-off valve and the pilot valve, the secondary air supply system becomes large, making it difficult to arrange compactly in a limited space

Method used

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  • Secondary air feeding system using for exaust of forced air-cooling engine
  • Secondary air feeding system using for exaust of forced air-cooling engine
  • Secondary air feeding system using for exaust of forced air-cooling engine

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Embodiment Construction

[0023] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] Fig. 2 is a schematic diagram showing the overall structure of a motorcycle on which a forced air-cooled engine employing a secondary air supply system for exhaust according to an embodiment of the present invention is mounted. image 3 It is a side sectional view showing the structure of the forced air cooling engine. 4 is a plan sectional view showing the structure of a forced air-cooled engine. Figure 5 is a sectional view showing a fan cover and a cylinder head in which a secondary air supply system according to an embodiment of the present invention is placed. Image 6 is a sectional view showing the cylinder head.

[0025] As shown in Figure 2, the forced air-cooled engine of the present invention is contained on the scooter, promptly is contained on the so-called scooter 1. This scooter 1 has a footrest portion 5 formed between a front c...

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Abstract

The cylinder head or the like is surrounded by a cooling wind cowling to cool the cylinder head or the like with a cooling fan in this forced air cooling type engine of a motorcycle. A secondary air reed valve is arranged on an exhaust system to feed the secondary air to an exhaust path via the secondary air reed valve in this secondary air feeding device for the exhaust. The secondary air reed valve is integrally incorporated in the cylinder head and surrounded by the cooling wind cowling to be invariably exposed to the cooling wind introduced into the cooling wind cowling.

Description

technical field [0001] The invention relates to a forced air-cooled engine for a motorcycle, in particular to an arrangement of a secondary air supply system for a forced air-cooled engine for a motorcycle. Background technique [0002] It is known that secondary air is usually supplied to the exhaust system in order to purify the exhaust gases expelled from the motorcycle engine. The structure of such motorcycle engine secondary air supply system is to guide the air through the air filter into the exhaust port of the cylinder head, and oxidize the unburned components in the exhaust gas, thereby reducing the air pollution of the exhaust gas. [0003] The structure of a common secondary air supply system is shown in FIGS. 1A and 1B . There is a secondary air valve 120 (integrated with a switch valve and a pilot valve), which is arranged close to the cylinder block of the engine 100. The cylinder block is denoted by 110, the air sucked through the air filter (not shown) is in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/34F01N3/30F01P5/06
CPCF01N3/30Y02T10/20Y02T10/12
Inventor 铃木一立矢田弘康
Owner SUZUKI MOTOR CORP
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