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Combustion chamber constructions for opposed-piston engines

A technology of combustion chamber and internal combustion engine, which is applied in the field of combustion chamber and can solve the problems of reducing the speed of engine thermal efficiency

Active Publication Date: 2013-02-27
ACHATES POWERS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The higher velocity vector of the swirl occurs near the cylinder wall, which provides the worst case for heat loss: the high temperature gas has a velocity that transfers heat to the cylinder wall and reduces the thermal efficiency of the engine

Method used

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  • Combustion chamber constructions for opposed-piston engines
  • Combustion chamber constructions for opposed-piston engines
  • Combustion chamber constructions for opposed-piston engines

Examples

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Embodiment Construction

[0029] Within the combustion chamber configuration to be described, an internal combustion engine includes at least one cylinder with longitudinally separated exhaust and intake ports. See, for example, cylinder 10 shown in FIGS. 1 and 2 . A pair of pistons are opposedly disposed within the bore of the cylinder, and a combustion chamber structure is defined between opposed end surfaces of the pistons as they move toward a top dead center position. A circumferential region defines a periphery on each of these end surfaces. The combustion chamber includes a cavity defined between end surfaces and has at least one opening through which fuel is injected (hereinafter referred to as "injection port"), the opening extending at least substantially in the radial direction of the cylinder and opening into the cavity.

[0030] During operation of an internal combustion engine, as the pistons approach top dead center TDC, one or more squish regions direct a flow of compressed air (known...

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Abstract

A combustion chamber for an opposed-piston engine includes a squish zone defined between circumferential peripheral areas of opposing end surfaces of the pistons, a cavity defined by one or more bowls in the end surfaces, and at least one injection port that extends radially through the squish zone into the cavity. The cavity has a cross-sectional shape that imposes a tumbling motion on air flowing from the squish zone into the cavity.

Description

technical field [0001] The field is combustion chambers for internal combustion engines. In particular, the field includes configurations for opposed-piston engines in which a combustion chamber is defined between the end surfaces of pistons disposed opposite in the bore of the cylinder. More specifically, the field includes opposed-piston engines with combustion chamber configurations that produce a tumbling motion between the piston end surfaces within the charge admitted into the cylinder. Background technique [0002] According to FIG. 1 , the opposed engine comprises at least one cylinder 10 with a bore 12 in which are machined or formed longitudinally arranged intake and exhaust ports 14 and 16 . One or more fuel injectors 17 are secured within injection ports (where the injectors are positioned) that open through the side surfaces of the cylinder. According to the prior art two pistons 20, 22 are arranged inside the bore 12 with their end surfaces 20e, 22e facing e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01B7/02F02B23/06
CPCY02T10/125F02B23/0624F02B23/0621F02B2275/48F02B23/0633F01B7/02F02B75/282F02B23/0678F02B23/0651F02B23/0663F02B23/0675Y02T10/12F02B75/28F02F3/0015F02F3/24
Inventor K·B·富卡F·G·勒东H·申M·H·瓦尔B·M·伦斯基
Owner ACHATES POWERS INC
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