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Internal-combustion engine

An internal combustion engine and fuel technology, applied in the direction of internal combustion piston engine, combustion engine, mechanical equipment, etc., can solve the problems of difficulty in ensuring stratified combustion and inability to achieve mixture distribution, and achieve the effect of ensuring stratified combustion and stable stratified combustion

Active Publication Date: 2015-06-17
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, even if these conditions deviate slightly, the desired distribution of the air-fuel mixture cannot be achieved, especially a rich air-fuel mixture cannot be reliably generated around the spark plug, making it difficult to ensure stable stratified combustion

Method used

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Examples

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Embodiment Construction

[0055] Next, preferred embodiments of the present invention will be described with reference to the drawings. figure 1 An internal combustion engine (hereinafter referred to as "engine") 1 according to one embodiment of the present invention is shown. The engine 1 is, for example, an inline 4-cylinder gasoline engine, and is mounted on a vehicle (not shown). The engine 1 includes a cylinder block 2 and a cylinder head 3 provided above it.

[0056] Four cylindrical cylinders 4 (only one is shown in the figure) that are open upward are formed in the cylinder block 2 , and a piston 5 is provided in each cylinder 4 . and, figure 1 The reference numeral 2a in is the water jacket for the cooling water for cooling the engine 1 to flow.

[0057] The piston 5 is connected to a crankshaft (not shown), and as the engine 1 operates, the piston 5 reciprocates while sliding in the cylinder 4 according to the crank angle. In addition, a recess 6 is formed on the top surface of the piston...

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Abstract

An internal-combustion engine includes a cylinder, a piston, a spark plug, and a fuel injection valve. The piston includes a top surface and a cavity provided in the top surface. The cavity includes a bottom surface, a vertical wall, a first sidewall, and a second sidewall. The fuel injection valve includes a plurality of injection ports from which a plurality of fuel mists are to be obliquely injected toward the top surface of the piston in respectively different directions at a predetermined crank angle in a compression stroke. The cavity extends from a position close to a center of the piston toward the fuel injection valve when viewed from above the top surface of the piston. The first and second sidewalls extend toward the fuel injection valve when viewed from above the top surface of the piston.

Description

technical field [0001] The present invention relates to an in-cylinder direct-injection internal combustion engine that injects fuel directly into cylinders and ignites and burns a mixture of fuel and air by spark ignition. Background technique [0002] As a conventional direct-injection internal combustion engine, for example, an internal combustion engine disclosed in Patent Document 1 is known. This internal combustion engine includes a piston reciprocating in a cylinder, a spark plug facing a combustion chamber in the cylinder, and a fuel injection valve. A recess is formed on the top surface of the piston so as to be offset from the vicinity of the center of the piston to the vicinity of the injection port of the fuel injection valve. In the recess, first and second guide wall surfaces are respectively formed near the injection port and near the center of the piston. The first guide wall surface is formed of an inclined surface that extends linearly and obliquely so a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02B17/00F02B15/00
CPCF02B23/0651F02B23/104F02B2023/103F02M61/14F02M61/1813Y02T10/12
Inventor 佐藤宽朗本桥康弘北野温也高桥真嘉平野浩充田中俊
Owner HONDA MOTOR CO LTD