KR20170014765A - Apparatus of indicator valve for engine - Google Patents

Apparatus of indicator valve for engine Download PDF

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Publication number
KR20170014765A
KR20170014765A KR1020150108628A KR20150108628A KR20170014765A KR 20170014765 A KR20170014765 A KR 20170014765A KR 1020150108628 A KR1020150108628 A KR 1020150108628A KR 20150108628 A KR20150108628 A KR 20150108628A KR 20170014765 A KR20170014765 A KR 20170014765A
Authority
KR
South Korea
Prior art keywords
engine
sleeve
pressure
combustion chamber
measuring
Prior art date
Application number
KR1020150108628A
Other languages
Korean (ko)
Inventor
이성훈
임채순
김훈석
정대열
Original Assignee
현대중공업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대중공업 주식회사 filed Critical 현대중공업 주식회사
Priority to KR1020150108628A priority Critical patent/KR20170014765A/en
Publication of KR20170014765A publication Critical patent/KR20170014765A/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G01L23/26—Details or accessories
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
    • F02D35/023—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
    • F16B39/10—Locking of screws, bolts or nuts in which the locking takes place after screwing down by a plate, spring, wire or ring immovable with regard to the bolt or object and mainly perpendicular to the axis of the bolt

Abstract

According to an embodiment of the present invention, there is provided an apparatus for measuring an engine pressure, comprising: a measuring unit configured to measure pressure inside a combustion chamber formed in an engine; A sleeve connected to the engine to communicate the measurement portion to the combustion chamber and having at least a polygonal cross section; And a fixing unit connecting the sleeve and the cylinder head of the engine through a hollow part penetrating the sleeve to fix the sleeve.
The pressure measuring device for an engine according to the present invention is characterized in that the sleeve has a polygonal cross-section so as to prevent the measuring part from rotating and includes a fixing part for fixing the sleeve so that the fixing part of the measuring part fixed to the cylinder is increased, So that the combustion pressure measurement can be performed safely.

Description

Technical Field [0001] The present invention relates to an apparatus for measuring the pressure of an engine,

The present invention relates to a pressure measuring device for an engine.

The engine system compresses the air (raw gas) introduced into the combustion chamber to a high temperature and a high pressure, injects and fills a fuel with a larger pressure, and ignites the exhaust gas. The engine system includes an engine having a combustion chamber in which fuel is combusted, and a turbocharger (turbocharger) connected to the engine.

Here, in order to increase the efficiency of the fuel, the turbocharger pre-compresses the air in the compressor and supplies it to the combustion chamber. Thus, a turbocharger for compressing and injecting air using the exhaust gas pressure discharged from the engine is connected to the engine.

Since the engine is always supplied with excess air in accordance with the engine speed, a large amount of nitrogen oxide, which is a harmful substance, is discharged, and it is necessary to remove harmful substances by regulation on environmental problems. Therefore, the exhaust gas of the engine is recirculated back to the intake side to reduce the harmful substances present in the exhaust gas at the time of combustion.

Here, exhaust gas recirculation (EGR) can suppress the generation of nitrogen oxides by reducing the temperature of the combustion chamber by supplying a part of the exhaust gas to the scavenging gas (intake air) of the engine.

In addition, when the intake air of the engine is humidified by water, the heat capacity of the intake air is increased, the temperature rise of the combustion gas is suppressed and the generation of nitrogen oxides is reduced. When used together with the exhaust gas recirculation device, have.

On the other hand, the cylinder head provided in the engine is composed of the structure above the combustion chamber, and a pressure measuring device is assembled to measure the combustion chamber pressure. However, the pressure measuring device is not only rotated in the course of operation of the engine, but also its weight and shape are somewhat large, so that the fixing of the pressure measuring device is disrupted due to vibration during operation of the engine. The gas inside the combustion chamber is liable to leak during operation of the engine, thereby causing a safety concern.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pressure measuring device which can be stably connected to an engine by increasing the clamping force of the pressure measuring device so as to safely perform the combustion pressure measurement.

According to an embodiment of the present invention, there is provided an apparatus for measuring an engine pressure, comprising: a measuring unit configured to measure pressure inside a combustion chamber formed in an engine; A sleeve connected to the engine to communicate the measurement portion to the combustion chamber and having at least a polygonal cross section; And a fixing unit connecting the sleeve and the cylinder head of the engine through a hollow part penetrating the sleeve to fix the sleeve.

Specifically, the sleeve is a polygonal bar shape.

Specifically, the hollow part has more vertexes than the number of the polygonal vertexes of the sleeve, and the vertex of the sleeve is in close contact with the inner circumferential surface of the vertex of the hollow part.

Specifically, the fixing portion is bolted to the cylinder head of the engine.

The pressure measuring device for an engine according to the present invention is characterized in that the sleeve has a polygonal cross section to prevent rotation of the measuring part and includes a fixing part for fixing the sleeve so that the fixing part of the measuring part fixed to the cylinder is increased, So that the combustion pressure measurement can be performed safely.

1 is a view showing an engine in which a pressure measuring device for an engine is installed according to an embodiment of the present invention.
Fig. 2 is a view showing A in Fig.
3 is a perspective view illustrating an apparatus for measuring an engine pressure according to an embodiment of the present invention.
4 is a view showing a measuring unit of the pressure measuring apparatus for an engine according to an embodiment of the present invention.
5 is a perspective view showing a state where a sleeve of a pressure measuring device for an engine according to an embodiment of the present invention is installed on a cylinder head.
6 is a view showing a state where a fixing portion of an engine pressure measuring device according to an embodiment of the present invention is installed on a cylinder head.
7 is a view showing a fixing portion of a pressure measuring device for an engine according to an embodiment of the present invention.
8 is a view showing a shape of a hollow part in a fixing part of an apparatus for measuring an engine pressure according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objects, particular advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a view showing an engine provided with an engine pressure measuring device according to an embodiment of the present invention. FIG. 2 is a view showing A in FIG. 1, and FIGS. 1 is a view for explaining an example of a pressure measuring apparatus for an engine according to an example.

1 to 8, a pressure measuring apparatus 100 according to an embodiment of the present invention includes a measuring unit 110, a sleeve 120, and a fixing unit 130. The pressure measuring apparatus 100 Measures the pressure inside the combustion chamber 12 and is connected to the cylinder head 11B.

Here, the engine 10 includes an exhaust pipe (not shown) for exhausting the exhaust gas and an intake pipe (not shown) for sucking the exhaust gas (which may include air, etc.). When the engine 10 is provided with the combustion chamber 12 and fuel is injected into the combustion chamber 12, fuel (raw gas or the like) is burned and discharged from the engine 10, (Not shown) and a compressor (not shown).

Here, the combustion chamber 12 is a space in which the fuel explodes, and is a space formed so that the piston 13 can be reciprocated inside the cylinder 11 provided in the engine 10. The intake passage for introducing the desired gas into the cylinder 11 may be communicated with a manifold (not shown). The piston 13 can be raised and lowered in the guide of the cylinder 11 in accordance with the explosion of the fuel.

A crankshaft (not shown) and a connecting rod 14 are connected to the piston 13 and the power shaft 15 can be rotated in conjunction with the movement of the piston 13 in the ascending and descending directions. Here, the power shaft 15 can be connected to a generator (not shown), and electric power can be generated by receiving the rotational force from the generator shaft 15. Alternatively, a propeller (not shown) may be connected to the power shaft 15, and the propeller may be rotated together with the power shaft 15 to advance or reverse the hull.

The measuring unit 110 measures the pressure inside the combustion chamber 12 formed in the engine 10. The measuring unit 110 measures the peak pressure of the combustion chamber 12.

For example, a measurement unit 110 for measuring the internal pressure of the combustion chamber 12 installed in the engine 10 is installed in the engine 10 of the ship. The valve body 111 is provided with a sleeve 120 And a pressure gauge (not shown) or a cap nut (not shown) for measuring the pressure inside the combustion chamber 12 is provided at the upper portion of the valve body 111 . Here, the pressure gauge is provided to measure the pressure inside the combustion chamber 12, and the cap nut can be installed with the pressure gauge removed when the pressure is not measured.

A fluid passage 112 is formed so as to pass through the inside of the valve body 111 and a fluid passage 112 and a valve installation space portion 113 communicating with the outside are formed at one side of the central portion of the valve body 111 And an opening / closing port (not shown) may be screwed into the valve mounting space 113 so as to open / close the fluid passage 112. At this time, it can be installed so as to close the opening / closing hole while bumping against the front surface in which fluid acts from the outside to the inside of the opening / closing hole.

The inner pressure of the combustion chamber 12 is applied to the pressure gauge through the fluid passage 112 and the opening and closing hole so that the inner pressure of the combustion chamber 12 is displayed on the pressure gauge, .

The sleeve 120 is connected to the engine 10 so as to communicate the measuring portion 110 to the combustion chamber 12, and at least a part thereof has a polygonal section. For example, the sleeve 120 may have a polygonal bar shape. In contrast to the bar shape having a cross section of a circle, the polygonal polygonal vertices prevent the swing of the sleeve 120, and the rotation can be prevented.

The sleeve 120 is communicated with the combustion chamber 11 through the hollow portion and communicates with the fluid passage 112 of the measuring portion 110 so that the pressure gauge can measure the pressure inside the combustion chamber 11. [ do.

Here, an adhesive may be applied to the outer circumferential surface of the sleeve 120 and fixed to the cylinder head 11B. The sleeve 120 is connected to the fixing portion 130 in order to prevent the sleeve 120 which is wobbled when the engine 10 is driven from weakening the fixing force with respect to the cylinder head 11B.

The fixing portion 130 is configured to support the sleeve 120 to prevent the sleeve 120 from being shaken and is connected on the cylinder head 11B of the engine 10 so as to be fastened with the bolt 131 . The cylinder head 11B may have a rib 11C formed with a bolt hole 11D so that a pair of bolts 131 are fastened. The fastening portion 130 may be formed with a fastening hole 133 through which the bolt 131 is inserted or fastened to correspond to the bolt hole 11D.

The fixing part 130 connects the sleeve 120 and the cylinder head 11B of the engine 10 through a hollow part 132 that penetrates the sleeve 120 so that the sleeve 120 is fixed. The hollow part 132 may correspond to the cross-sectional shape of the sleeve 120 so that the sleeve 120 is connected so that the fixing part 130 is oriented such that it does not interfere with the peripheral structure on the cylinder head 11B, 120 have more vertexes than the number of polygonal vertices of the sleeve 120 so as to minimize the rotation angle of the fixing unit 130. [

For example, referring to FIG. 8, when the cross section of the sleeve 120 is hexagonal, the hollow part 132 has a hollow with two hexagons (see FIG. 8, 132A, 132B) 120 may have six vertices and the hollow part 132 may have twelve vertices. At this time, each of the vertexes of the sleeve 120 may be fixedly attached to the inner circumferential surface of the vertex of the hollow part 132.

As described above, according to the present embodiment, the sleeve 120 has a polygonal cross-section to prevent rotation of the measuring unit 110, and is fixed to the cylinder 11 by including the fixing unit 130 for fixing the sleeve 120 The fixing force of the measuring unit 110 can be increased to be stably connected to the engine 10, so that the combustion pressure measurement can be safely performed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification and the modification are possible.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: engine 11: cylinder
11A: cylinder block 11B: cylinder head
11C: rib 11D: bolt hole
12: combustion chamber 13: piston
14: Connecting rod 15: Power shaft
100: pressure measuring device 110: measuring part
120: Sleeve 130:
131: bolt 132: hollow part
133: fastening hole

Claims (4)

A measuring unit for measuring a pressure inside the combustion chamber formed in the engine;
A sleeve connected to the engine to communicate the measurement portion to the combustion chamber and having at least a polygonal cross section; And
And a fixing part for connecting the sleeve and the cylinder head of the engine through a hollow part penetrating the sleeve so that the sleeve is fixed. 2. The apparatus of claim 1,
Wherein the bar-like shape is a polygonal bar shape. The method according to claim 1,
Wherein the hollow part has more vertices than the number of polygon vertices of the sleeve,
And the vertex of the sleeve is in close contact with the inner circumferential surface of the vertex of the hollow part. The apparatus according to claim 1,
And a bolt fastened to the cylinder head of the engine.
KR1020150108628A 2015-07-31 2015-07-31 Apparatus of indicator valve for engine KR20170014765A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150108628A KR20170014765A (en) 2015-07-31 2015-07-31 Apparatus of indicator valve for engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150108628A KR20170014765A (en) 2015-07-31 2015-07-31 Apparatus of indicator valve for engine

Publications (1)

Publication Number Publication Date
KR20170014765A true KR20170014765A (en) 2017-02-08

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Family Applications (1)

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KR1020150108628A KR20170014765A (en) 2015-07-31 2015-07-31 Apparatus of indicator valve for engine

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KR (1) KR20170014765A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110439696A (en) * 2018-05-02 2019-11-12 温特图尔汽柴油公司 For determining the device and big-block engine of the pressure in big-block engine combustion chamber
KR102378974B1 (en) * 2021-08-17 2022-03-24 정경진 Combustion pressure sensor assembly on cylinder head

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110439696A (en) * 2018-05-02 2019-11-12 温特图尔汽柴油公司 For determining the device and big-block engine of the pressure in big-block engine combustion chamber
CN110439696B (en) * 2018-05-02 2023-07-04 温特图尔汽柴油公司 Device for determining the pressure in the combustion chamber of a large engine and large engine
KR102378974B1 (en) * 2021-08-17 2022-03-24 정경진 Combustion pressure sensor assembly on cylinder head

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