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Miller cycle gasoline engine

A gasoline engine and Miller cycle technology, applied in the direction of engine components, combustion engines, machines/engines, etc., can solve the problems that cannot meet the fuel consumption and emission requirements well, and achieve improved thermal efficiency, improved thermal efficiency, and improved gas tumble flow speed effect

Active Publication Date: 2021-12-28
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of realizing the present disclosure, the inventors found that the highest thermal efficiency of the existing Miller cycle gasoline engines of major automobile manufacturers can only reach about 37%, which cannot well meet the fuel consumption and emission requirements

Method used

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  • Miller cycle gasoline engine
  • Miller cycle gasoline engine
  • Miller cycle gasoline engine

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Embodiment Construction

[0063] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0064] Before the implementation of the present application is further described in detail, the orientation nouns involved in the embodiments of the present application, such as "upper", "lower", and "side", are only used to clearly describe the Miller of the embodiments of the present application. The structure of the cycle gasoline engine does not have the significance of limiting the protection scope of this application. In order to cope with the increasingly tens...

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Abstract

The embodiment of the present invention provides a Miller cycle gasoline engine, the intake port (1) is in the shape of a fish maw, so that more gas in the intake port (1) can enter from the upper side of the intake valve (3) The cylinder head increases the gas tumble velocity in the engine cylinder. The intake camshaft (2) is a Miller camshaft. Since the Miller camshaft is used as the intake camshaft (2), the expansion ratio of the engine can be greater than the compression ratio, improving thermal efficiency, while the fish maw-shaped intake port (1) It also increases the intake tumble velocity in the engine cylinder. The tumble is a large-scale airflow movement in the cylinder. At the end of the compression stroke, the piston (6) moves up to crush the large-scale tumble flow in the cylinder into small-scale turbulence. The higher the turbulence intensity, the faster the combustion during ignition, thereby further effectively improving the thermal efficiency of the gasoline engine.

Description

technical field [0001] The invention relates to the field of high-efficiency gasoline engines, in particular to a Miller cycle gasoline engine. Background technique [0002] In order to meet the increasingly stringent emission and fuel consumption regulations, major automobile manufacturers have begun to research high-efficiency gasoline engines, improve engine thermal efficiency, and thereby reduce fuel consumption. [0003] The Miller cycle gasoline engine has been adopted by more and more automobile manufacturers because its expansion ratio is greater than the compression ratio, which can effectively improve thermal efficiency. [0004] In the process of realizing the present disclosure, the inventors found that the maximum thermal efficiency of the existing Miller cycle gasoline engines of major automobile manufacturers can only reach about 37%, which cannot well meet the requirements of fuel consumption and emission. Contents of the invention [0005] In view of this...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M35/10F01L1/047F01L1/08F01L1/26F02F1/42F02F1/24F02F3/00F02F1/14F02F1/40
CPCF02M35/10091F02M35/10124F01L1/047F01L1/08F01L1/26F02F1/4235F02F1/242F02F3/00F02F1/14F02F1/40F02B2275/32Y02T10/12
Inventor 刘义克刘华龙赵世超
Owner CHERY AUTOMOBILE CO LTD