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Spark ignition type internal combustion engine

A spark ignition, internal combustion engine technology, applied to internal combustion piston engines, combustion engines, mechanical equipment, etc., can solve problems such as no mention of content

Inactive Publication Date: 2010-08-11
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned literature has no mention of this aspect

Method used

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  • Spark ignition type internal combustion engine
  • Spark ignition type internal combustion engine
  • Spark ignition type internal combustion engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] figure 1 A side sectional view showing a spark ignition internal combustion engine.

[0025] refer to figure 1 , Reference numeral 1 denotes a crankcase, 2 denotes a cylinder block, 3 denotes a cylinder head, 4 denotes a piston, 5 denotes a combustion chamber, 6 denotes a spark plug arranged at the central portion of the top surface of the combustion chamber 5, 7 denotes an intake valve, 8 Indicates the intake port, 9 indicates the exhaust valve, and 10 indicates the exhaust port. The intake port 8 is connected to a surge tank (surge tank) 12 through an intake branch pipe 11 , and a fuel injection valve 13 for injecting fuel into the corresponding intake port 8 is disposed on each intake branch pipe 11 . In addition, instead of attaching the fuel injection valve 13 to each intake branch pipe 11 , the combustion injection valve 13 may be arranged in each combustion chamber 5 .

[0026] Adjustment tank 12 is connected to air cleaner 15 through intake pipe 14 in which t...

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PUM

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Abstract

An internal combustion engine has a variable compression ratio mechanism (A) capable of changing a mechanical compression ratio and also has a variable valve timing mechanism (B) capable of controlling timing of closure of an intake valve (7). On the low engine load operation side, the mechanical compression ratio is maintained at the highest level, and on the high engine load operation side, theratio is gradually reduced with an increase in the engine load. Combustion at a theoretical air-fuel ratio is taken place on the high engine load operation side, and combustion at a lean air-fuel ratio is taken place on the low engine load operation side where the mechanical compression ratio is at the highest level.

Description

technical field [0001] This invention relates to spark ignition internal combustion engines. Background technique [0002] A spark ignition type internal combustion engine is known (for example, refer to Japanese Patent Application Laid-Open No. 2004-218522 ): a variable compression ratio mechanism capable of changing the mechanical compression ratio and a variable valve timing mechanism capable of controlling the closing timing of the intake valve. Timing mechanism (variable valve train), and when the internal combustion engine is operating at a medium load and when the internal combustion engine is operating at a high load, the supercharging effect of the supercharger is performed, and when the internal combustion engine is transformed from high load operation to medium load operation, it is used The mechanical compression ratio is increased and the closing timing of the intake valve is retarded as the engine load decreases in a state where the actual compression ratio is ...

Claims

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Application Information

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IPC IPC(8): F02D15/04F02D13/02F02D15/02F02D41/02
CPCF02D13/0269Y02T10/42Y02T10/18Y02T10/142F02D2041/002F02D2041/001F02B75/041F02D41/0002Y02T10/12F02D13/0238F02D15/04F02D41/1475Y02T10/40
Inventor 秋久大辅泽田大作
Owner TOYOTA JIDOSHA KK