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Fuel direct-injection spark ignition internal combustion engine

A spark ignition and direct injection technology, which is applied in spark ignition controllers, internal combustion piston engines, spark plugs, etc., can solve problems such as misfires

Inactive Publication Date: 2004-01-28
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Misfire may occur as a result

Method used

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  • Fuel direct-injection spark ignition internal combustion engine
  • Fuel direct-injection spark ignition internal combustion engine
  • Fuel direct-injection spark ignition internal combustion engine

Examples

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Embodiment Construction

[0018] figure 1 It is a sectional view illustrating a part of the fuel direct injection spark ignition internal combustion engine of the first embodiment of the present invention. figure 2 yes figure 1 Plan view of the piston shown. In these figures, reference numeral 1 denotes an intake port, and 2 denotes an exhaust port. The intake port 1 is connected to the cylinder through the intake valve 3; the exhaust port 2 is connected to the cylinder through the exhaust valve 4. Reference numeral 5 denotes a piston, and 6 denotes a spark plug mounted near the center of the top wall of the cylinder. The fuel injection valve 7 injects fuel in a flat fan shape with a small thickness.

[0019] For example, in the homogeneous fuel combustion area that requires higher engine output power, the fuel injection valve 7 injects the required amount of fuel during the intake stroke to form a uniform combustible mixture in the cylinder during ignition. On the other hand, in the stratified...

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Abstract

A direct-fuel-injection-type spark-ignition internal combustion engine is disclosed. The engine comprises a spark plug, a cavity formed on the top surface of the piston, and a fuel injection valve for injecting fuel into the cavity in nearly the shape of a fan having a relative small thickness. In the engine, the side wall of the cavity facing the fuel injection valve, for leading the fuel to the vicinity of the spark plug, has a horizontal sectional shape consisting of a part of an ellipse shape of which two foci are at a position of the injection hole of the fuel injection valve and a position near to the spark plug in plan view, and the side wall has a deflecting portion to deflect the fuel toward the inside of the cavity.

Description

technical field [0001] The invention relates to a fuel direct injection spark ignition internal combustion engine. Background technique [0002] In conventionally known stratified fuel combustion, fuel is directly injected into the cylinder to form a mixture (combustible mixture). When igniting, only the mixture near the spark plug is easily ignited, so that the lean mixture in the entire cylinder burns. In order to achieve stratified fuel combustion, fuel is generally injected in the second half of the compression stroke. It is hoped that the fuel injected in this way will reach the arched combustion chamber, be gasified by the frictional heat of the wall surface of the combustion chamber, and be deflected to the spark plug due to the shape of the combustion chamber, forming a combustible mixture near the spark plug. [0003] Generally speaking, the fuel injection valve injects fuel in a conical shape towards the heart. Therefore, in the final stage of fuel injection, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02P13/00F02B23/10F02B75/12F02F3/26
CPCY02T10/125F02B2075/125F02F3/26F02B23/104Y02T10/123Y02T10/12F02B23/10
Inventor 梅花丰一松下宗一安部静生羽岛孝志小林辰夫村松伸幸堤泰人藤森功吉
Owner TOYOTA JIDOSHA KK
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