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Cylinder head for internal combustion engine

A technology of cylinder head and internal combustion engine, which is applied to the direction of internal combustion piston engine, cylinder head, combustion engine, etc., can solve the problem of the deterioration of the warm-up performance of the catalyst, and achieve the effect of reducing the surface area of ​​the passage.

Inactive Publication Date: 2009-12-09
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem in an internal combustion engine with a turbocharger installed in the exhaust system that, even at a cold start, the exhaust gas passes through the turbine of the turbocharger, so the heat of the exhaust gas is taken away here and Cooling down, catalyst warm-up performance decline

Method used

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  • Cylinder head for internal combustion engine
  • Cylinder head for internal combustion engine
  • Cylinder head for internal combustion engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] figure 1 is a schematic diagram showing a cylinder head of an internal combustion engine according to Embodiment 1 of the present invention, figure 2 is a longitudinal sectional view showing the internal combustion engine of Embodiment 1, image 3 is a longitudinal sectional view showing the cylinder head of the internal combustion engine of Embodiment 1, Figure 4 It is a sectional view showing the waist gate valve in the internal combustion engine of the first embodiment.

[0046] The internal combustion engine of embodiment 1 is an in-line 4-cylinder engine, such as figure 1 and figure 2 As shown, the cylinder head 11 is assembled with the cylinder block 12 at the lower part thereof, and is fastened by a plurality of fastening bolts not shown. A plurality of (four in this embodiment) cylinder bores 13 are formed in a line on the cylinder block 12 , and a piston 14 is fitted to each cylinder bore 13 so as to be movable in the axial direction thereof. Further, a...

Embodiment 2

[0076] Figure 5 is a schematic diagram showing a cylinder head of an internal combustion engine according to Embodiment 2 of the present invention, Figure 6 It is a longitudinal sectional view showing a cylinder head of the internal combustion engine of the second embodiment. In addition, components having the same functions as those described in the above-mentioned embodiments are denoted by the same reference numerals, and repeated explanations are omitted.

[0077] In the internal combustion engine of embodiment 2, as Figure 5 , Figure 6 As shown, the cylinder head 71 is assembled with the cylinder block 12 at the lower part thereof, and is fastened by a plurality of fastening bolts not shown. A plurality of combustion chambers 16 are formed in the cylinder head 71 , and the intake port 17 opens opposite to the exhaust port 18 , and the intake passage 19 communicates with the intake passage 19 through the intake port 17 , and the exhaust passage 20 communicates with ...

Embodiment 3

[0087] Figure 7 is a schematic diagram showing a cylinder head of an internal combustion engine according to Embodiment 3 of the present invention, Figure 8 is a longitudinal sectional view showing the main parts of the cylinder head of the internal combustion engine of Embodiment 3 ( Figure 7 VIII-VIII sectional view). In addition, components having the same functions as those described in the above-mentioned embodiments are assigned the same reference numerals, and repeated explanations are omitted.

[0088] In the internal combustion engine of embodiment 3, as Figure 7 and Figure 8 As shown, a plurality of combustion chambers 82a, 82b, 82c, and 82d are formed in the cylinder head 81, and intake ports 83a, 83b, 83c, and 83d open opposite to exhaust ports 84a, 84b, 84c, and 84d. The air ports 83a, 83b, 83c, 83d communicate with four intake passages 85a, 85b, 85c, 85d, and communicate with one exhaust passage 86 through the exhaust ports 84a, 84b, 84c, 84d, and the ex...

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PUM

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Abstract

In a cylinder head for internal combustion engine according to the invention, one ends of an exhaust path 20 communicate with a plurality of combustion chambers 16 through exhaust ports 18, respectively, an assembling section 22 is provided on the other ends of the exhaust path 20, and a turbo supercharger 45, an exhaust tube 46 and an exhaust purification catalyst 47 are connected to the assembling section 22, on the other hand, a bypass path 52 communicating from the exhaust path 20 to the exhaust tube 46 and the exhaust purification catalyst 47 by bypassing a turbo supercharger 45 is provided and an exhaust control valve 53 capable of opening and closing the bypass path 52 is provided, and a bypass hole 62, which is a part of the bypass path 52, is provided in the cylinder head 11. In the cylinder head of the internal-combustion engine, catalyst warm-up performance is improved and a device is made compact-sized.

Description

technical field [0001] The present invention relates to a cylinder head of an internal combustion engine which constitutes a combustion chamber by being fastened to an upper portion of a cylinder block, and is provided with an intake passage and an exhaust passage relative to the combustion chamber. Background technique [0002] Generally, in an internal combustion engine, a cylinder head is assembled on an upper portion of a cylinder block, and fastened by a plurality of fastening bolts, and a plurality of combustion chambers are arranged in a straight line. In addition, an intake port and an exhaust port are formed opposite to each combustion chamber, and the intake passage communicates with each intake port, while the exhaust passage communicates with each exhaust port, and passes through the intake valve. And the exhaust valve opens and closes freely. In addition, an injector for injecting fuel is attached to each intake passage or each combustion chamber, and an igniti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F1/42F02B37/18F02B39/00F02F7/00
CPCY02T10/146F01N3/2006F01N13/105F02F1/243F02F1/4264F02B37/18Y02T10/26Y02T10/144F02B37/025Y02T10/12
Inventor 高川元户佐直己大下哲男
Owner TOYOTA JIDOSHA KK
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