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Control method for vehicle-mounted ECU

A technology of engine load and throttle position, applied in electrical control, engine control, fuel injection control, etc., to achieve the effects of prolonging service life, reducing fuel consumption, and increasing power at medium and high speeds

Inactive Publication Date: 2017-08-11
林培青
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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 for vehicle-mounted ECU
  • Control method for vehicle-mounted ECU
  • Control method for vehicle-mounted ECU

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Embodiment Construction

[0055] 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.

[0056] An engine with electronically controlled variable compression ratio and fuel injection position, which includes a variable compression ratio mechanism capable of changing the mechanical compression ratio, and a fuel injection nozzle 810 that works synchronously with the telescoping mechanism, and makes the engine run at low load The compression ratio of the engine is completely different from the compression ratio and fuel injection position when the engine i...

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Abstract

The present invention proposes a control method for a vehicle-mounted ECU, which includes: adjusting the extension or retraction of the variable compression piston and the advance and retreat of the ignition time based on changes in the accelerator position and engine speed. The technical solution of the present invention is achieved in that the variable compression piston is installed at the combustion chamber place of the cylinder head and is connected with the motor, and the vehicle-mounted ECU controls the motor so that the compression ratio when the engine is running at low load is consistent with the middle load and high load running of the engine. The compression ratios at different times are completely different, so as to realize different compression ratios and ignition times for different engine loads and different engine speeds. Thereby, the power and dynamics of the engine are improved.

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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Patent Type & Authority Applications(China)
IPC IPC(8): F02D29/02F02D15/02F02D41/30
CPCF02D29/02F02D15/02F02D41/30F02D2200/101
Inventor 林培青
Owner 林培青
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