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Intake port fuel injection engine

A technology of fuel injection and air intake ports, which is applied to combustion engines, internal combustion piston engines, engine ignition, etc., and can solve problems such as unstable combustion, low exhaust gas purification performance, and reduced fuel efficiency

Inactive Publication Date: 2013-06-26
MITSUBISHI MOTORS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to increase the temperature of the exhaust gas purification catalytic converter, a method of delaying the ignition time and thereby increasing the temperature of the exhaust gas is effective, but this method has a problem of unstable combustion
Therefore, the amount of fuel injection must be increased in order to stabilize combustion, however, in this case, fuel efficiency is lowered, and exhaust gas purification performance may remain low until the exhaust gas purification catalytic converter is activated

Method used

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  • Intake port fuel injection engine
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Examples

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Embodiment Construction

[0033] An embodiment of the present invention will be described below with reference to the accompanying drawings.

[0034] figure 1 It is a cross-sectional view schematically showing the internal structure of an intake port fuel injection engine (hereinafter referred to as engine 1 ) according to the present invention.

[0035] Such as figure 1 As shown in , an engine 1 according to an embodiment of the present invention is an engine having an intake stroke injection mode for injecting fuel from a fuel injection valve 3 provided in an intake passage 2 toward a combustion chamber 4 .

[0036] A spark plug 6 is disposed in an approximately central portion of a cylinder head 5 of the engine 1 so as to face the combustion chamber 4 . The lower surface of the cylinder head 5 slopes downward on either side of a generally central ridged line, thereby defining the monopitched roof shape of the combustion chamber 4 . The intake port 7 opens in one inclined surface forming the lower...

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Abstract

An engine provided with an intake stroke injection mode for injecting fuel from a fuel injection valve provided in an intake passage toward the interior of a combustion chamber when an intake valve is open, wherein: a projecting part (34) is positioned on the top surface of a piston (30) so as to project upward, extend in a left-right direction transecting an intake flow direction, and is offset toward the front side of the intake flow direction; a cavity (32) is formed on the front side of the projecting part (34) in the intake flow direction; and an electrode (6a) of a spark plug (6) is positioned so as to face the cavity (32).

Description

technical field [0001] The present invention relates to engines configured to inject fuel into an intake port, and more particularly to engines that inject fuel when an intake valve is open. Background technique [0002] As an intake port fuel injection engine configured to inject fuel from a fuel injection valve provided in the intake port, an engine has been developed which is operable in an intake stroke injection mode so that Fuel is injected when the intake valve (intake valve) is open. [0003] In such an engine having an intake stroke injection mode, fuel is injected when an exhaust valve is closed while an intake valve is opened, whereby discharge of fuel into an exhaust gas passage can be suppressed. Also, even if the fuel injection valve is provided in the intake port, fuel can be supplied to the inside of the combustion chamber with proper timing and accuracy, which can improve engine output and fuel efficiency, like cylinder type fuel injection engines. [0004...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B23/08F02F3/26F02P5/15F02P13/00
CPCF02B23/08F02D41/3023F02F3/26F02F3/28F02P5/1506Y02T10/12
Inventor 秦幸司田中大
Owner MITSUBISHI MOTORS CORP
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