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Fuel-direct-jetting type internal combustion engine

A direct-injection internal combustion engine and fuel injection valve technology, applied in fuel injection devices, internal combustion piston engines, combustion engines, etc., can solve the problems of emission, fuel consumption rate, exhaust emission deterioration, etc., to reduce heat loss and improve flame spread , the effect of improving thermal efficiency

Active Publication Date: 2008-07-09
HONDA MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In extreme cases, misfires and unburned air-fuel mixtures are emitted, which leads to deterioration of fuel consumption and exhaust emissions

Method used

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  • Fuel-direct-jetting type internal combustion engine
  • Fuel-direct-jetting type internal combustion engine
  • Fuel-direct-jetting type internal combustion engine

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0028] Embodiments of the present invention will be described below with reference to the accompanying drawings.

[0029] See Figure 1 and figure 2 , the fuel direct injection internal combustion engine E to which the present invention is applied is a spark ignition type four-stroke single-cylinder internal combustion engine. The internal combustion engine E includes a crankcase 1 rotatably supporting a crankshaft 7 , a cylinder 2 connected to the crankcase 1 , a cylinder head 3 connected to an upper end of the cylinder 2 , and a head cover 4 connected to the upper end of the cylinder head 3 . A piston 5 fitted in a cylinder bore 2 a of the cylinder 2 and capable of reciprocating movement rotates a crankshaft 7 through a connecting rod 6 . As shown in FIG. 1, the internal combustion engine E is mounted on the motorcycle in a state in which the cylinder 2 located at the front of the motorcycle with respect to the crankshaft 7 is slightly inclined toward the upper side of the mo...

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PUM

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Abstract

A cylinder injection of fuel-type internal combustion engine (E), wherein a fuel injection valve (60) injects air / fuel mixture so that the outer peripheral edge (63a) of an injection flow (63) can be stored in a cavity (51) at the top part of a piston (5) in a compression stroke. Diagonal squish (20) upwardly moving toward the centerline (L4) of injection and positioned along an opposed part (30a) of a ceiling surface (30) opposed, on the upper side thereof, to the opening of the cavity (51) is generated at the peripheral edge part (53) of the piston (5) in association with a squish area (54) formed at the peripheral edge part (53) of the piston (5) and a squish area (34) formed on the ceiling surface (30) of a cylinder head (3) forming a combustion chamber (8). Thus, fuel consumption and exhaust emission can be improved by preventing or suppressing the diffusion and parting of the air / fuel mixture by the squish.

Description

technical field [0001] The present invention relates to a spark ignition type fuel direct injection type internal combustion engine having a fuel injection valve exposed to a combustion chamber and a spark plug, wherein the fuel injection valve injects fuel into a cavity formed on a top surface of a piston. Background technique [0002] Hitherto, as a fuel direct injection type internal combustion engine of the above-mentioned type, an engine disclosed in Japanese Patent No. 2,936,806 is known. In this fuel direct injection type internal combustion engine, fuel is injected obliquely toward a bottom wall surface of a depression formed on a top surface of a piston, and is made to flow toward a chamber defining a combustion chamber below a spark plug provided at the center of the inner wall surface of a cylinder head. area, so that the fuel is vaporized by the action of the spiral flow and by the inertia of the injected fuel and the squeezing effect of the inflowing air. There...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02B23/10F02F1/24F02F3/28F02M61/14F02M67/02F02B61/02F02B75/12F02B75/16F02F1/42
CPCF02B75/16Y02T10/125F02B2075/125F02B2023/102Y02T10/123F02M61/14F02F1/4214F02B61/02F02B23/101Y02T10/12
Inventor 塙薰上田浩矢石田周一
Owner HONDA MOTOR CO LTD
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