Internal combustion engine with seat ring holes

A technology for internal combustion engines and seat rings, applied to internal combustion piston engines, combustion engines, mechanical equipment, etc., can solve the problems of affecting combustion form, negative impact on thermal efficiency, and affecting combustion efficiency, so as to achieve the effect of optimizing gas exchange and optimizing engine efficiency

Active Publication Date: 2022-03-25
MAN TRUCK & BUS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the need for race holes, e.g. the compression ratio is reduced, which has a negative impact on thermal efficiency
In addition, the seat ring hole also greatly affects the combustion form, and thus affects the combustion efficiency

Method used

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  • Internal combustion engine with seat ring holes
  • Internal combustion engine with seat ring holes
  • Internal combustion engine with seat ring holes

Examples

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Effect test

Embodiment Construction

[0045] The embodiments shown in the figures are at least partly identical, such that similar or identical parts are identified with the same reference numerals, and for their explanation also reference is made to the description of the other embodiments or figures, in order to Avoid repetition.

[0046] figure 1 One cylinder 12 of internal combustion engine 10 is shown. The internal combustion engine 10 is a four-stroke internal combustion engine, in particular a four-stroke diesel internal combustion engine or a four-stroke gasoline internal combustion engine. Preferably the internal combustion engine 10 is incorporated in a commercial vehicle, such as a van or a bus, for example for driving the commercial vehicle.

[0047] The cylinder 12 has a plurality of intake valves 14 (in figure 1 Only one is shown in ), multiple exhaust valves 16 (in figure 1 Only one is shown in ), a combustion chamber 18 and a piston 20 .

[0048] The intake valve 14 connects the combustion cha...

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PUM

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Abstract

The invention relates to an internal combustion engine (10) for a motor vehicle having at least one cylinder (12) with a first intake valve (14A) and a second intake valve (14B). The cylinder (12) has a first exhaust valve (16A), a second exhaust valve (16B) and a reciprocating piston (20), the piston has a piston crown (26; 126; 226), and the piston crown has a plurality of Seat holes (30,32,34,36). Seat holes (30, 32, 34, 36) are respectively provided for the first intake valve (14A), the second intake valve (14B), the first exhaust valve (16A) and the second exhaust valve (16B) , and the several race holes (30, 32, 34, 36) have at least partially different depths. Alternatively, seat ring holes (30; 34) are provided for the first intake valve (14A) and the first exhaust valve (16A) respectively, but not for the second intake valve (14B) and / or the second exhaust valve (16B) Set the seat ring hole.

Description

technical field [0001] The invention relates to an internal combustion engine having a piston with a plurality of race bores. Background technique [0002] It is known that the piston crown of a piston of an internal combustion engine is provided with a seat ring bore for a gas exchange valve. [0003] For example, DE 10 2007 027 787 A1 discloses an internal combustion engine in which a seat ring hole is formed in the end face of the piston, which seat ring hole faces the gas exchange valve. [0004] It is also known to actuate the intake and exhaust valves with a valve overlap. Valve overlap refers to the period of time between when the intake valves begin to open and when the exhaust valves end when they close. [0005] For example, in order to be able to achieve a large valve overlap in a diesel engine, a race hole must be provided in the piston. Valve overlap is used to optimize gas exchange and thus overall engine efficiency. With a positive pressure difference betw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02F3/28F02B23/00
CPCF02B23/00F02F3/28F02B23/06F02D13/0257F02D13/0261F02B29/086Y02T10/12F01L1/34F01L3/22F02F1/4214
Inventor 多米尼克·雷纳托马斯·玛丽斯澈威思科
Owner MAN TRUCK & BUS AG
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