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Divider plate for an inlet port, sand core for forming an inlet port, and cylinder head

A technology of air inlet and partition plate, which is applied in the direction of core, cylinder head, casting and molding equipment, etc., can solve the problems such as the inability to fully suppress the position shift of the partition plate and the inability to absorb thermal expansion, and achieves easy deburring operation, The effect of suppressing position shift and improving product quality

Inactive Publication Date: 2008-07-23
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even if the wavy partition plate can absorb the radial thermal expansion of the air inlet, it cannot absorb the axial thermal expansion.
Therefore, it is impossible to sufficiently suppress the position shift of the partition plate and looseness in the product caused by the difference in thermal expansion between the partition plate and the core.

Method used

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  • Divider plate for an inlet port, sand core for forming an inlet port, and cylinder head
  • Divider plate for an inlet port, sand core for forming an inlet port, and cylinder head
  • Divider plate for an inlet port, sand core for forming an inlet port, and cylinder head

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Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0042] First, the cylinder head 10 having the partition plate 100 for the intake port 14 which is the premise of the present invention will be described. In addition, in the following description, the partition plate 100 for the inlet port 14 is also called "the swirl plate 100".

[0043] figure 1 is a schematic sectional view showing a cylinder head 10 of an engine, figure 2 is a sectional view of the air inlet 14 perpendicular to the centerline, image 3 is a schematic diagram showing the airflow state of the engine, Figure 4 is along figure 1 A schematic sectional view of line 4-4.

[0044] refer to Figure 1 ~ Figure 4 , the cylinder head 10 has: it is arranged on the top of the cylinder block 11, and the intake air flow composed of air or gas fuel from the intake manifold 12 is introduced into the intake port 14 in the cylinder bore 13; Exhaust port 15 for the exhaust gas after combustion. The air inlet is roughly divided into a double connection type and a split...

no. 2 Embodiment approach

[0098]10(A) is a plan view showing a swirl plate 100a according to the second embodiment, FIG. 10(B) is a cross-sectional view taken along line 10B-10B in FIG. 10(A), and FIG. 10(C) is for explanation. It is a figure which changes the length of the swirl plate 100a of 2nd Embodiment in a casting process. In addition, the same code|symbol is attached|subjected to the same member as 1st Embodiment, and description is abbreviate|omitted.

[0099] The swirl plate 100a of the second embodiment has a seal forming portion 130 for forming a seal portion between the intake ports 14 in addition to the structure of the swirl plate 100 of the first embodiment. The seal forming portion 130 is provided at a position closer to the intake side end portion Tb than the position at which the promoting portion 110 is provided in the inner overcast portion 104 . The seal forming part 130 has a punched hole 131 formed through the inner square overcast part 104 leaving an overcast part of a necessa...

no. 3 Embodiment approach

[0104] Figure 11 It is a top view showing the die core 200a provided with the swirl plate 100b of the third embodiment in advance. In addition, the same code|symbol is attached|subjected to the same member as 1st and 2nd embodiment, and description is abbreviate|omitted.

[0105] The third embodiment is compatible with the first and second cylinder heads 10 which are suitable for a cylinder head 10 having a split type intake port 14 in that the swirl plate 100b and the port core 200a are suitable for a cylinder head having a double connection type intake port. 2 are implemented differently.

[0106] The swirl plate of the present invention has a plate-shaped main body 101 arranged across a plurality of intake ports, but the type of intake ports is not limited to the split type. The invention can also be applied to double-joint type air inlets. As mentioned above, the intake port of the double connection type has a passage shape branched into two branches in front of the co...

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Abstract

The invention discloses a swirl board (100), which comprises the following parts: board-shaped main part (101) to cross multiple inlets of cylinder lid (14), multiple spaced parts to separate part of main part into multiple holes, lateral casting part (103) on two lateral edges of main part, inner casting part (104) among multiple spaced parts in the main part, accelerating part (110) to accelerate solidification of metal melt liquid on the part of inner casting part.

Description

technical field [0001] The present invention relates to a partition plate for an air intake port, a core for forming an air intake port, and a cylinder head. Background technique [0002] Some recent internal combustion engines have a cylinder head equipped with a mechanism called a divided port. This type of cylinder head divides the intake port into upper and lower parts by a partition called a swirl plate. By controlling the air flow control valve arranged at the end of the intake side of the intake port, the intake air introduced from the intake port to the cylinder bore is deflected by the partition plate, and the tumble flow (longitudinal vortex flow) generated in the cylinder bore is strengthened, Realize the improvement of fuel consumption (refer to Japanese Patent Application Laid-Open No. 2001-193469 (refer to paragraphs 0011, 0020, 0022 and figure 1 , 3 , 4)). [0003] In addition, in this specification, in the partition plate, the upstream side where the inta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/22
CPCF02F1/4242Y02T10/146B22C9/10B22D19/0009Y02T10/12B22C9/24F02B31/00F02F1/24
Inventor 增田达也梶原弘仁加藤博之八下田健次
Owner NISSAN MOTOR CO LTD
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