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Control method of vehicle-mounted ECU

A control method and accelerator position technology, applied in mechanical control, automatic control, automatic control and other directions to achieve the effect of reducing fuel consumption, prolonging service life, and improving low-speed torque

Inactive Publication Date: 2018-04-13
泉州市中研智能机电研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention proposes a variable compression ratio engine, which solves the problem of uniform compression ratio of different engine loads in the prior art

Method used

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  • Control method of vehicle-mounted ECU
  • Control method of vehicle-mounted ECU
  • Control method of vehicle-mounted ECU

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Embodiment Construction

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0055] A variable compression ratio engine, which includes a variable compression ratio mechanism capable of changing the mechanical compression ratio, and makes the compression ratio when the engine operates at a low load completely different from the compression ratios when the engine operates at a medium load and at a high load, realizing To meet different compression ratios at different engine loads and different engine speeds. Thus, the service life of the roc...

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Abstract

The invention provides a control method of a vehicle-mounted ECU. The control method of the vehicle-mounted ECU comprises the following steps: based on the change of the position of an accelerator andthe rotating speed of an engine, performing adjustment until a variable compression piston stretches out or retracts and the ignition time is advanced and retreated. The technical scheme of the invention is implemented as follows: the variable compression piston is arranged at the position of a combustion chamber of a cylinder head and is connected with a motor, and the vehicle-mounted ECU controls the motor, so that the compression ratio during low-load operation of the engine is totally different from the compression ratio during medium-load and high-load operation of the engine, and different compression ratios and ignition time are realized when the load of the engine is different and the rotating speed of the engine is different. Thereby, the power and the driving force of the engineare enhanced.

Description

technical field [0001] The present invention relates to a gasoline engine, in particular to an engine whose compression ratio can be changed according to engine load and rotation speed. Background technique [0002] The compression ratio of the engine refers to the ratio of the stroke of the working piston in the cylinder to the combustion chamber. The higher the compression ratio, the better the combustion efficiency. However, the higher the compression ratio, the higher the knocking of the engine, and the easier it is for the cylinder and piston to knock and wear. Especially under high load conditions, the power of the engine will drop instead. [0003] As the grade of gasoline gets higher and higher, the increase of octane number is to reduce the knocking caused by the high compression ratio. However, its effect is limited. It can only be controlled at 13:1. Of course, due to the refining and manufacturing process of gasoline in the same region, the compression ratio of...

Claims

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Application Information

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IPC IPC(8): F02D15/04F02P5/15F02B75/04
CPCF02B75/042F02D15/04F02D2200/101F02D2200/602F02D2700/03F02P5/1502Y02T10/40
Inventor 庄景阳
Owner 泉州市中研智能机电研究院有限公司
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