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Direct-injection internal combustion engine and method of controlling the same

An injection type, internal combustion engine technology, applied in the direction of fuel injection control, engine control, internal combustion piston engine, etc., can solve problems such as combustion degradation, and achieve the effect of inhibiting degradation

Inactive Publication Date: 2008-05-28
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, for the spray guide type direct injection type internal combustion engine, there is a problem that when the temperature in the cylinder is low due to the low intake air temperature, the combustion may further deteriorate

Method used

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  • Direct-injection internal combustion engine and method of controlling the same
  • Direct-injection internal combustion engine and method of controlling the same
  • Direct-injection internal combustion engine and method of controlling the same

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Embodiment Construction

[0028] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited to the embodiments described below. The described embodiments include components that can be easily assumed by those skilled in the art, and / or those components that are substantially the same as these components.

[0029] FIG. 1 is a diagram showing a configuration example of a spray guide type direct injection internal combustion engine according to a first embodiment. The diagram of FIG. 2A shows the arrangement of the fuel injection valve and the spark plug relative to the combustion chamber. FIG. 2B shows a cross-sectional view along line 2B-2B of FIG. 2A. As shown in FIG. 1 , a direct-injection internal combustion engine 1-1 includes: a fuel supply device 2; an internal combustion engine body 3 composed of a plurality of cylinders (inline four cylinders in the first embodiment); an air passage 5; an exhaust passage 6 c...

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Abstract

In a direct-injection internal combustion engine, a variable intake valve, of which valve timing can be varied, is used as an air intake valve through which an air intake path and a combustion chamber communicate with each other. The direct-injection internal combustion engine includes: a variable-intake-valve control section that controls the valve timing of the variable intake valve; and an intake-air temperature acquisition section that acquires a temperature of the intake air introduced into the combustion chamber. When the fuel is injected into the combustion chamber via a fuel injection valve during a compression stroke or an expansion stroke, if the acquired intake-air temperature is low, the closing timing of the variable intake valve is advanced, so that the actual compression ratio is increased.

Description

technical field [0001] The invention relates to a direct injection internal combustion engine and a method of controlling the direct injection internal combustion engine. More particularly, the present invention relates to a direct injection internal combustion engine that injects fuel through a fuel injection valve during a compression stroke or an expansion stroke and a method of controlling the direct injection internal combustion engine. Background technique [0002] In recent years, a direct injection type internal combustion engine in which fuel is directly injected into a combustion chamber through a fuel injection valve has been widely used. In a direct injection internal combustion engine, the combustion mode changes from stratified charge combustion to homogeneous charge combustion according to the operating state of the internal combustion engine. Stratified charge combustion is mainly performed at light load and low speed operation, such as when the engine is ju...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D13/02F02D41/30
CPCY02T10/18F02D41/3011F02D13/0203Y02T10/12F02B23/10F02D15/00F01L1/34
Inventor 芦泽刚野村启富野修
Owner TOYOTA JIDOSHA KK