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Internal combustion engine

An internal combustion engine and oil technology, which is applied to internal combustion piston engines, combustion engines, mechanical equipment, etc., can solve problems such as increased oil volume and oil flow into the cylinder, and achieve the effect of preventing abnormal combustion and suppressing the probability of occurrence.

Inactive Publication Date: 2012-10-17
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art described above, the timing at which the engine oil can be discharged to the outside is limited to when the internal combustion engine is stopped.
Therefore, when the internal combustion engine is continuously operated for a long period of time, the amount of oil in the surge tank increases, and the oil may still flow into the cylinder.

Method used

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  • Internal combustion engine
  • Internal combustion engine
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Embodiment approach 1

[0017] Below, refer to figure 1 as well as figure 2 Embodiment 1 of the present invention will be described.

[0018] figure 1 It is a figure which shows the structure of the characteristic part of the internal combustion engine of this embodiment, figure 2 is showing figure 1 The A-A section diagram of . The internal combustion engine according to the present embodiment is a spark ignition type four-stroke reciprocating engine. Furthermore, it is an in-line four-cylinder engine provided with four cylinders in-line. Therefore, the cylinder head 2 and the surge tank 4 are connected by four intake branch pipes 6 .

[0019] Air outlets 8A, 8B, 8C, and 8D are formed in connection portions of the surge tank 4 connected to the intake branch pipes 6 . Air outlets 8A, 8B, 8C, 8D are formed on the upper half side of surge tank 4 . This is because the engine oil is accumulated in the bottom 10 of the surge tank 4 so that the engine oil does not flow out from the air outlets 8A...

Embodiment approach 2

[0026] Below, refer to image 3 as well as Figure 4 Embodiment 2 of the present invention will be described.

[0027] image 3It is a schematic diagram showing the whole of the internal combustion engine of the present embodiment. The internal combustion engine according to the present embodiment is a spark ignition type four-stroke reciprocating engine, and is an inline four-cylinder engine provided with four cylinders in series. In addition, the internal combustion engine according to the present embodiment is also a turbocharged engine including the turbocharger 20 . The turbocharger 20 is a so-called twin scroll turbo, and the exhaust system connected to the turbine part thereof is divided into two systems. That is, the exhaust system 22 for combining the exhaust gas of the first cylinder (#1) and the exhaust gas of the fourth cylinder (#4), and the exhaust system 22 for combining the exhaust gas of the second cylinder (#2) with the exhaust gas of the third cylinder (...

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Abstract

Disclosed is an internal combustion engine in which abnormal combustion accompanying the influx of oil does not easily occur. For this, the internal combustion engine is equipped with a plurality of cylinders that are arranged along the flow of cooling water and a surge tank that has a plurality of air outlets connected to the cylinders. The surge tank is formed in a manner such that a relatively larger amount of oil accumulates near the air outlets connected to the cylinders positioned on the upstream side of the cooling water flow and a relatively smaller amount of oil accumulates near the air outlets connected to the cylinders positioned on the downstream side of the cooling water flow.

Description

technical field [0001] The present invention relates to an internal combustion engine, and in particular, to an internal combustion engine having a surge tank. Background technique [0002] In internal combustion engines for automobiles, it is known that oil accumulates in surge tanks thereof. This engine oil is formed by the oil mist contained in the blow-by gas adhering to the wall surface of the surge tank. When a large amount of oil accumulated in the surge tank flows into a cylinder at one time, abnormal combustion occurs in the cylinder. Especially in the low-speed high-load region, the oil flowing into the cylinder spontaneously ignites during the compression stroke or before the flame propagates after ignition, thereby causing serious symptoms such as premature ignition or heavy knock. [0003] Regarding such a problem, in the prior art disclosed in Japanese Patent Application Laid-Open No. 9-236054, a recess for oil accumulation is provided in the surge tank, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M35/10F01M13/00
CPCF02M35/10157F01M11/08F02M35/112Y02T10/144F02M35/10281F02M35/10052F02B37/00F01M13/00Y02T10/12
Inventor 冈田吉弘
Owner TOYOTA JIDOSHA KK