Fuel supply device for internal combustion engine

一种燃料供给装置、燃料供给的技术，应用在液体燃料给料机、装料系统、机械设备等方向，能够解决燃料箱容量下降等问题，达到提高配置的自由度的效果

Active Publication Date: 2011-12-14
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this reduces the capacity of the fuel tank and is therefore not preferred

Method used

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  • Fuel supply device for internal combustion engine
  • Fuel supply device for internal combustion engine
  • Fuel supply device for internal combustion engine

Examples

Experimental program
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Embodiment Construction

[0024] figure 1 The internal combustion engine 10 shown is formed, for example, as a transverse one-cylinder four-stroke engine. The internal combustion engine 10 includes a crankcase 12 integrally having a cylinder 11 , a crankshaft 13 , a piston 14 , a combustion chamber 15 , an intake valve 16 , and an exhaust valve 17 . The crankshaft 13 is arranged horizontally. The cylinder 11 is inclined upward.

[0025] The intake system 30 for the internal combustion engine 10 is composed of an air filter 31 , a throttle valve 32 , a carburetor 33 and an intake pipe 34 . The carburetor 33 has a float chamber 33a that temporarily stores fuel. The intake pipe 34 is connected to the intake port 21 of the internal combustion engine 10 .

[0026] In the internal combustion engine 10 , part of the combustion gas generated in the combustion chamber 15 leaks into the crankcase 12 from between the cylinder 11 and the piston 14 . This leaked combustion gas is called blowby gas. A large am...

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PUM

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Abstract

A fuel supplying apparatus (50) is disclosed that suppresses intrusion of oil mist into a negative pressure introducing inlet (52g) of an automatic cock (52) and that, thereby, improves the degree of freedom of disposition. The negative pressure introducing inlet (52g) of the automatic cock (52) is connected to a crankcase (12) through a negative pressure communication path (54). The automatic cock (52) is opened by a negative pressure generated in the crankcase (12) and, thereby, a fuel supply path (53) is opened that is for supplying fuel from a fuel tank (51) to an internal combustion engine (10). The negative pressure communication path (54) communicates with the air cleaner (31) through a purge path (55) that branches from the negative pressure communication path (54) at a halfway point of the negative pressure communication path. The point (54a) at which the purge path branches from the negative pressure communication path (54) is set to be at the lowest position of the negativepressure communication path to be able to collect the oil mist intruding from the crankcase (12).

Description

technical field [0001] The present invention relates to a device for supplying fuel to an internal combustion engine, in particular to a technique for opening a fuel supply passage by using negative pressure in a crankcase. Background technique [0002] There are two methods of supplying fuel from a fuel tank to an intake system of an internal combustion engine: a supply method using a fuel pump and a supply method using gravity. The fuel supply method utilizing gravity is as follows: a fuel tank is arranged above the carburetor, and fuel is supplied from the fuel tank to the carburetor. This method is widely used because of its relatively simple structure. [0003] In the gravity-based fuel supply system, an auto cock is provided in a fuel supply passage for introducing fuel from a fuel tank to a carburetor. The automatic switch is a valve that uses negative pressure in the crankcase to open the fuel supply passage. When the internal combustion engine is running, a negati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M37/00
CPCF02M37/02F02M37/20F02M37/0017
Inventor 小林隆夫
Owner HONDA MOTOR CO LTD
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