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A swirl-conserving combustion chamber construction for opposed-piston engines

A technology of opposed pistons and combustion chambers, applied to internal combustion piston engines, reciprocating piston engines, combustion engines, etc., can solve problems such as lack of

Active Publication Date: 2016-08-03
ACHATES POWERS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the continuously curved configuration of the ridges defines a combustion chamber shape that lacks the enhanced swirl retention effect

Method used

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  • A swirl-conserving combustion chamber construction for opposed-piston engines
  • A swirl-conserving combustion chamber construction for opposed-piston engines
  • A swirl-conserving combustion chamber construction for opposed-piston engines

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Embodiment Construction

[0024] In construction to be described, an opposed-piston engine includes at least one cylinder having a bore and longitudinally separated exhaust and intake ports formed or machined in the sidewall of the cylinder. A pair of pistons are oppositely disposed within the bore of the cylinder, and a combustion chamber is defined between opposing end faces of the pistons as the pistons move through respective TC positions. Circumferential area includes the periphery on each end face. The combustion chamber structure includes a cavity or space in a bore defined by opposing end faces of the piston. In plan, the combustion chamber has an elongated, trench-like shape with a widened central section. The elongated combustion chamber shape extends across the diameter of the cylinder. The combustion chambers have diametrically opposed openings through which fuel is injected.

[0025] During operation of the internal combustion engine, one or more squish regions direct a flow of compress...

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Abstract

A combustion chamber construction for opposed-piston engines includes an elongated, bilaterally symmetrical shape referenced to a major axis and a pair of injection ports located on the major axis when the pistons are near respective top center positions. The combustion chamber is defined between a bowl in the end surface of a first piston of a pair of pistons and mirrored ridges protruding from the end surface of a second piston of the pair. Each ridge includes a central portion that curves toward a periphery of the end surface of the second piston and which transitions to flanking portions that curve away from the periphery. The ridge configuration imparts a substantially spherical configuration to a central portion of the combustion chamber where swirling motion of charge air is conserved.

Description

[0001] priority [0002] This international application claims priority to US Patent Application 14 / 026,931, filed September 13, 2013. technical field [0003] This field includes opposed-piston engines in which a combustion chamber is defined between the end faces of a piston disposed oppositely in a bore of a ported cylinder. More specifically, the field includes opposed-piston engines having combustion chamber structures that promote complex, turbulent bulk motion of charge air entering the cylinders. Background technique [0004] A two-stroke cycle engine is an internal combustion engine that completes its cycle of operation with a single complete revolution of the crankshaft and two strokes of a piston connected to the crankshaft. One example of a two-stroke cycle engine is an opposed-piston engine, in which a pair of pistons are oppositely disposed in bores of a cylinder for reciprocating movement in opposite directions. According to FIG. 1 , the opposed-piston engin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B23/06F02B75/28F01B7/02
CPCF01B7/02F02B23/0621F02B23/0624F02B23/0633F02B23/0651F02B23/0663F02B23/0678F02B25/08F02B75/28F02B75/282F02B2075/025Y02T10/12
Inventor F·G·勒东
Owner ACHATES POWERS INC
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