Gasoline engine ignition mechanism comprising supersonic jet orifice pre-combustion chamber

An ignition mechanism and pre-combustion chamber technology, which is applied to combustion engines, machines/engines, internal combustion piston engines, etc., can solve the problems of difficult ignition of mixture gas and slow combustion speed of mixture gas, so as to reduce fuel consumption and improve combustion Performance, the effect of extending the lean burn limit

Active Publication Date: 2021-11-23
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, lean combustion technology also has technical problems that need to be solved urgently
Due to the dilution of excess air, the combustion speed of the mixture in the cylinder slows down, and the ignition of the mixture is more difficult. It is difficult to effectively expand the limit of lean combustion and continue to tap the fuel-saving potential of lean combustion by traditional spark plug ignition.

Method used

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  • Gasoline engine ignition mechanism comprising supersonic jet orifice pre-combustion chamber
  • Gasoline engine ignition mechanism comprising supersonic jet orifice pre-combustion chamber
  • Gasoline engine ignition mechanism comprising supersonic jet orifice pre-combustion chamber

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Embodiment 1

[0034] combine Figure 1-6 , to illustrate the specific implementation scheme of this embodiment.

[0035] The main combustion chamber of the engine used in conjunction with the present embodiment is "hemispherical".

[0036] An ignition mechanism for a gasoline engine comprising a supersonic jet orifice pre-combustion chamber, comprising: a cylindrical connecting piece 1, a fuel injector mounting hole penetrating through the upper end surface and the lower end surface of the connecting piece, and a spark plug penetrating through the upper end surface and the lower end surface of the connecting piece Mounting hole, pre-combustion chamber cavity 5 connected to the outer peripheral surface of the connector through threads, pre-chamber injector 4 working with the injector mounting hole, pre-chamber spark plug 2 working with the spark plug mounting hole, spark plug Gasket 3, sealing gasket 6;

[0037] The above-mentioned spark plug gasket realizes the sealing between the pre-cha...

Embodiment 2

[0048] Control attached Figure 7-9 , the main combustion chamber of the engine used in conjunction with the present embodiment is "canopy shape". The ignition mechanism is installed in the center of the "canopy" main combustion chamber cylinder head.

[0049] Among the above nozzle holes, 2 are supersonic overexpansion jet nozzle holes 8, and 4 are ordinary subsonic direct injection holes 9; Two subsonic ordinary direct injection holes are arranged on both sides of the "canopy" concave.

[0050] The rest of the structure is exactly the same as that of Embodiment 1, and the working process is also completely the same as that of Embodiment 1.

[0051] In view of the structural design features of the "canopy" main combustion chamber, a mixed configuration of supersonic jet nozzles and subsonic ordinary direct injection holes is adopted to achieve balanced combustion of the mixture gas in each part of the main combustion chamber as much as possible, which is conducive to improv...

Embodiment 3

[0053] Control attached Figure 10-12 , the main combustion chamber of the engine used in conjunction with the present embodiment is "canopy shape". The ignition mechanism is mounted offset in the position of the "canopy" main combustion chamber cylinder head;

[0054] Among the above nozzle holes, 3 are supersonic overexpansion jet nozzles 8, and 3 ordinary subsonic direct injection holes 9; the subsonic ordinary direct injection holes point to the narrower part of the jet space, and the overexpanded supersonic jet nozzle points to the jet distance farther away.

[0055] The rest of the structure is exactly the same as that of Embodiment 1, and the working process is also completely the same as that of Embodiment 1.

[0056] In view of the structural design features of the "canopy" main combustion chamber, a mixed configuration of supersonic jet nozzles and subsonic ordinary direct injection holes is adopted to achieve balanced combustion of the mixture gas in each part of ...

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Abstract

The invention relates to a gasoline engine ignition mechanism comprising a supersonic jet orifice pre-combustion chamber. The ignition mechanism comprises a cylindrical connecting piece, an oil sprayer mounting hole penetrating through the upper end face and the lower end face of the connecting piece, a spark plug mounting hole penetrating through the connecting piece, a pre-combustion chamber connected with the peripheral face of the connecting piece, a pre-combustion chamber oil sprayer matched with the oil sprayer mounting hole and a pre-combustion chamber spark plug matched with the spark plug mounting hole, wherein the pre-combustion chamber is formed by combining three sections, namely a first cylindrical sleeve body, a conical sleeve body and a second cylindrical cavity body from top to bottom in sequence, N uniformly distributed spray holes are formed in the lower part of the second cylindrical cavity body, and N is greater than or equal to 3; at least one of the spray holes is an over-expansion supersonic jet flow spray hole, and jet flow of the supersonic jet holes not only can shorten ignition delay, but also can prolong the lean combustion limit of a mixture in the main combustion chamber.

Description

Technical field: [0001] The invention relates to the technical field of lean combustion of internal combustion engines, in particular to an ignition mechanism for a gasoline engine comprising a supersonic jet nozzle pre-combustion chamber. Background technique: [0002] With the continuous deterioration of the ecological environment and the depletion of petrochemical energy, energy conservation and emission reduction has become an important starting point and breakthrough for optimizing the economic structure, promoting green cycle and low-carbon development, and accelerating the construction of ecological civilization. The engine is the main power device of civil vehicles, and its emission performance has an important impact on air quality. Lean combustion, as one of the potential technologies for realizing high-efficiency engines in the future, can effectively improve engine thermal efficiency and reduce emissions, and is an important way to further realize energy-saving a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B19/18F02B19/12F02B19/10
CPCF02B19/18F02B19/12F02B19/108Y02T10/12
Inventor 安彦召赵德阳裴毅强陈涛张帆秦静
Owner TIANJIN UNIV
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