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Control method of multi-cylinder engine and multi-cylinder engine device

A multi-cylinder engine and control method technology, applied in the direction of engine control, machine/engine, electrical control, etc., can solve problems such as difficult to detect and eliminate cylinder imbalance, reduced combustion efficiency, knocking, etc., to achieve improved combustion efficiency and Operational stability and the effect of eliminating imbalance

Active Publication Date: 2014-12-03
SAIC MOTOR
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AI Technical Summary

Problems solved by technology

The imbalance of multi-cylinder engines will bring challenges to the control of the engine, which will cause misfires, reduced combustion efficiency or knocking in the engine part cycle. It is often difficult to detect and eliminate the imbalance of each cylinder by using traditional control methods

Method used

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  • Control method of multi-cylinder engine and multi-cylinder engine device
  • Control method of multi-cylinder engine and multi-cylinder engine device

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the various structures in the drawings are only schematic illustrations, to enable those skilled in the art to best understand the principle of the present invention, and they are not necessarily drawn to scale.

[0023] figure 1 The structure of the multi-cylinder engine device 100 according to the embodiment of the present invention is shown. Such as figure 1 As shown, the multi-cylinder engine device 100 may generally include a crankshaft sensor, a cylinder pressure sensor corresponding to each cylinder, and an engine controller in addition to the necessary configuration of a general multi-cylinder engine. For example, for a four-cylinder engine, there may be four cylinder pressure sensors 1-4 corresponding to each cylinder. Those skilled in the art will understand that, in addition to figure 1 In the part...

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Abstract

The invention provides a control method of a multi-cylinder engine. The method comprises the following steps of acquiring the cylinder pressure signal of each cylinder and the corresponding engine crank shaft corner signal within a work cycle; according to the cylinder pressure signal and the crank shaft corner signal, calculating the combustion state information of each cylinder within the work cycle; within the next work cycle, based on the combustion state information of each cylinder, and aiming at the different combustion modes of the engine, adjusting the corresponding engine control parameter to balance the combustion state of each cylinder. The invention also provides a multi-cylinder engine device used for executing the method.

Description

technical field [0001] The present invention relates to engine control technology, and more particularly, to a control method for a multi-cylinder engine and a multi-cylinder engine device performing the method. Background technique [0002] Modern vehicle engines mostly use multi-cylinder engines such as four-cylinder, six-cylinder, and eight-cylinder engines. The more cylinders of the engine, the more uniform the crankshaft rotation and the smaller the vibration, but the manufacturing cost increases. The cylinders of multi-cylinder engines are arranged in-line, V-shaped, and horizontally opposed, depending on factors such as installation, manufacturing cost, and cooling methods. [0003] For a multi-cylinder engine using gasoline, due to the change of the state of the oil-air mixture in the cylinder, different combustion results will be produced in different cycles, and different cylinders will show imbalance even under the same control parameters. This phenomenon is com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/06
Inventor 章健勇陈林尹琪徐寅许小颖孔毅
Owner SAIC MOTOR
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