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Engine control method and device

A control method and engine technology, applied in engine control, machine/engine, electrical control, etc., can solve the problems of poor combustion phase control, fuel injection control combustion process, and smooth switching between compression ignition mode and ignition mode, etc., to achieve high efficiency Clean combustion, improved flexibility, and smooth switching effects

Pending Publication Date: 2020-11-24
SAIC MOTOR
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Problems solved by technology

[0003] Due to the poor control of the combustion phase of the existing engine, the combustion process cannot be controlled by changing the fuel injection timing, resulting in the inability to switch smoothly between the compression ignition mode and the ignition mode, which affects the efficient and clean combustion of fuel

Method used

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  • Engine control method and device
  • Engine control method and device

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Embodiment Construction

[0061] In order to make the above objects, features and advantages of the present application more obvious and understandable, the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0062] The inventor found in the research on the traditional control combustion mode switching method that the traditional switching method achieves switching by changing the ratio of two different fuel injections in the intake port, and the response speed of this method is faster. However, since the two nozzles are located in the intake port, the formed mixture is completely homogeneous when inhaled into the cylinder, and the control of the combustion phase is poor.

[0063] Based on this, embodiments of the present application provide an engine and a method for controlling the engine. The engine includes components such as an intake port injection system, an in-cylinder direct injecti...

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Abstract

The embodiment of the invention discloses an engine control method and an engine. The engine control method specifically comprises the steps that firstly, current operation parameters of the engine are obtained, an operation condition is determined according to the operation parameters, and a corresponding combustion strategy and a switching strategy are read according to the operation condition;and the engine is controlled to start a first combustion mode according to the combustion strategy. Meanwhile, whether the operation condition of the engine changes or not is detected in real time, and if yes, the engine is controlled to be switched from the first combustion mode to a second combustion mode according to the switching strategy. Obviously, when the operation condition of the enginechanges, stable switching of the combustion modes can be achieved according to the pre-configured switching strategy, so that efficient and clean combustion in the full-condition range is achieved, and the flexibility of combustion process control is improved.

Description

technical field [0001] The present application relates to the technical field of automobiles, in particular to an engine control method and device. Background technique [0002] With the continuous development of automobile technology, users have higher and higher demands for high efficiency and low emission of automobiles. Homogeneous compression ignition has always been one of the research focuses of internal combustion engine workers. The compression ignition combustion mode has high thermal efficiency, extremely low nitrogen oxide emissions and almost no soot emissions. However, since the ignition of the compression ignition mode depends on the combustion chemical reaction kinetics, the temperature of the mixture gas and the physical and chemical properties of the fuel are strictly required, so the range of operating conditions it can operate is narrow, and the combustion phase is extremely difficult to control. It is easy to knock under load, and easy to catch fire un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/00F02D41/30F02D29/02
CPCF02D41/0057F02D41/3064F02D41/3076F02D29/02
Inventor 邵强童来会张弘尹琪
Owner SAIC MOTOR
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