CN103196512A - Measuring method of volume of combustion chamber of cylinder block of engine - Google Patents
Measuring method of volume of combustion chamber of cylinder block of engine Download PDFInfo
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- CN103196512A CN103196512A CN2013100040894A CN201310004089A CN103196512A CN 103196512 A CN103196512 A CN 103196512A CN 2013100040894 A CN2013100040894 A CN 2013100040894A CN 201310004089 A CN201310004089 A CN 201310004089A CN 103196512 A CN103196512 A CN 103196512A
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Abstract
The invention discloses a measuring method of the volume of a combustion chamber of a cylinder block of an engine. The method comprises the following steps: A, a piston is positioned at the upper dead center; B, a right barrel is enclosed at the top of the cylinder block in a sealed manner, and the right barrel has a fixed volume value c of an inner chamber of the right barrel; C, a transparent panel is moved from one side of an opening at the top of the right barrel to the other side in a fitting manner, and meanwhile, a liquid medium is instilled into the right barrel through a burette; D, emergent air bubbles are removed through moving the transparent panel; E, after the inner chamber of the right barrel is filled with liquid, magnitude d of the liquid media is recorded; F, the volume of the combustion chamber of the cylinder block is calculated as per the formula d minus c equals v. Through adoption of the method, the problem that the volume, corresponding to a convex head piston or a piston with an irregular top part, of the partial combustion chamber of the cylinder block cannot be measured in the prior art is solved; and meanwhile, the problem that the emergent air bubbles during instillation of the liquid media cannot be observed or removed in the prior art is also solved, so that measurement accuracy the volume of the combustion chamber is improved.
Description
Technical field
The present invention relates to a kind of measuring method of engine combustion chamber volume, particularly relate to the measuring method of a kind of engine cylinder-body partial combustion chamber volume.
Background technology
Supercharged direct-injection engine becomes the main flow of the development of engine at present.Based on the characteristics of straight spray, the top combustion chamber shape need of piston is also more and more stricter.More abundant in order to guarantee that combination gas can mix in the firing chamber, top land generally can have been made pit form, firing chamber in irregular shape.Because this type of piston is behind the cylinder of packing into, therefore its top section or whole outstanding cylinder body upper surfaces when actual measurement cylinder part combustion chamber volume, can't directly be measured, thereby bring difficulty for measuring the engine actual compression ratio.
Notification number is the volumetric measurement ring gauge that the Chinese utility model patent of CN202041251U discloses a kind of diesel engine piston top combustion chamber, measures ring gauge and injects solution in the firing chamber and measure combustion chamber volume by this; Measure ring gauge and comprise ring gauge body and the ring gauge lid that is located on the ring gauge body; Described ring gauge body both ends open, inner hollow are enclosed within the top of described piston, and spacing by the step push stopping part that is arranged in its cavity; This step push stopping part and ring gauge lid and top land plane form cylindrical cavity between the two; Cover at ring gauge and also to be provided with solution and to enter the hole.Enter the hole by described solution and splash into solution in the firing chamber, full until dripping, the volume that drips solution deducts the volume that right cylinder volume gained that ring gauge body step push stopping part forms is the top land firing chamber.Though adopt the technical scheme of this utility model can measure the volume of diesel engine piston top combustion chamber, this gauge only can be measured the firing chamber is depression at top land structure.And for petrol engine, the firing chamber on the structure cylinder body that the firing chamber of its top land tends to raise up not only refers to the top land part, also should comprise the common structure that forms of piston and cylinder body.Therefore, need a kind of new measuring method that the combustion chamber volume of engine cylinder body portion is measured.In addition, this gauge enters by solution and can produce bubble in this cavity when the hole splashes into solution in the cylindrical cavity, and this gauge also is difficult for finding the generation of this bubble, has influenced the degree of accuracy of measuring when measuring.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of measuring method of engine cylinder-body combustion chamber volume, it is by fixing a straight cylinder with fixed volume at engine cylinder-body, and measure by drip drip solution body medium in this straight cylinder, solve the corresponding cylinder part combustion chamber volume of the piston problem that prior art can't be measured convex head piston or irregular top shape.Simultaneously, by the movement of a transparent plate, observe and eliminate the bubble that in the instillation process, produces, improve the degree of accuracy of measuring.
Technical scheme of the present invention is: a kind of measuring method of engine cylinder-body combustion chamber volume, and it comprises:
A, make piston be positioned top dead center position;
B, be enclosed in the top of cylinder body with straight cylinder sealing, this straight cylinder has the fixed volume value c of straight cylinder inner chamber;
C, to use a transparent plate to fit from the open-topped side direction opposite side of described straight cylinder mobile, and use dropper drip solution body medium in the described straight cylinder simultaneously;
D, eliminate the bubble that occurs by mobile described transparent plate;
E, after liquid is filled with the straight cylinder inner chamber value d of liquid medium that record injects;
F, calculating cylinder body combustion chamber volume v=d-c.
Solved the corresponding cylinder part combustion chamber volume of the piston problem that prior art can't be measured convex head piston or irregular top shape by this method.Also solve simultaneously prior art and can't observe and eliminate liquid medium and in the instillation process, produce air bubble problem, improved the measuring accuracy of combustion chamber volume.
As a kind of optimal technical scheme, the value of liquid medium that described record injects comprises: the original volume value a of record dropper liquid medium and the termination value b of dropper liquid medium when stopping to instil before instillation; The described value d=a-b that injects liquid medium.This method is simple, easy operating and enforcement.
Particularly, described liquid medium is oil or water.Be easy to obtain, cost is low, satisfies and measures requirement.
In order to improve the degree of accuracy of measurement, described straight cylinder is provided with the mounting flange corresponding with the fixing threaded hole of described cylinder body upper cylinder cover; Described straight cylinder is by being bolted on the described cylinder body; The end face of described straight cylinder exceeds the end face of the described bolt in fixing back.Be fixed on the cylinder body by the fixed form that straight cylinder is identical with cylinder cap, make measurement result more consistent with actual product.Further, the internal diameter of described straight cylinder equals the internal diameter of cylinder body.
As a kind of optimal technical scheme, described transparent plate is a smooth glass plate.Workpiece is easy to obtain and implements.
Effective effect that the present invention has, the one, the measurement that has solved the cylinder body combustion chamber volume of time rule projection; The 2nd, it is mobile to adopt transparent plate to fit, and is convenient to observe and eliminates producing bubble in the instillation process, improves measuring accuracy; The 3rd, the thickness of straight cylinder can design thinner, and when adopting drip to carry out volumetric measurement, the error of generation is less.
Description of drawings
Fig. 1 is instrumentation plan of the present invention.
Fig. 2 is that straight cylinder of the present invention is fixed on the synoptic diagram on the cylinder body.
Wherein, the fixed volume c of the termination value b of liquid medium, straight cylinder inner chamber in the original volume value a of liquid medium, the dropper in straight cylinder 1, mounting flange 101, bolt 102, transparent plate 2, dropper 3, cylinder body 4, piston 5, liquid medium 6, the dropper, inject value d, the cylinder body combustion chamber volume v of liquid medium.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Referring to Fig. 1 and Fig. 2, a kind of measuring method of engine cylinder-body combustion chamber volume, its device that adopts when measuring comprises a straight cylinder 1, a transparent plate 2 and a dropper 3.Straight cylinder 1 is provided with the internal diameter cylindrical cavity identical with cylinder body 4 internal diameters.In the present embodiment, the internal diameter of this cylinder body 4 is 77 millimeters, highly is 15 millimeters, and therefore, the fixed volume c of this straight cylinder inner chamber is 70 milliliters.Periphery at straight cylinder 1 is provided with mounting flange 101.The liquid medium 6 of packing in the dropper 3, the original volume value a of liquid medium 6 is 100 milliliters in this dropper.Mounting flange 101 be provided with four with cylinder body 4 on be used for the corresponding through hole of the fixing threaded hole of cylinder cap (not showing on the figure).Straight cylinder 1 is fixed on the end face of cylinder body 4 by bolt 102, straight cylinder 1 bottom surface and cylinder body 4 is is tightly connected.The thickness of straight cylinder 1 should be thin as far as possible, but its end face will exceed the end face of the described bolt in fixing back, and in the present embodiment, this raised area is about 2 millimeters, is convenient to the movement of transparent plate 2.Used transparent plate 2 is a glass plate in the present embodiment.Operate the original volume value a=100 milliliter of liquid medium in the combustion chamber volume of obtaining engine cylinder-body 4: A, the record dropper by following steps.B, make piston be positioned top dead center position.C, with straight cylinder 1 by the top of bolt 102 sealing and fixing at cylinder body 4.D, the transparent plate 2 of use are fitted mobile from straight cylinder 1 an open-topped side direction opposite side, and use dropper 3 to the inner chamber drip solution body medium 6 of this straight cylinder 1 simultaneously; In order to reduce the generation of bubble, dropper instils with 40～60 ml/min low speed.E, in the instillation process, as when bubble occurring, make the bubble elimination by mobile this transparent plate.F, stop to instil fill with the inner chamber of straight cylinder when liquid medium after, check and record the termination value b=32 milliliter of liquid medium in the dropper.The value that injects liquid medium in G, the calculating straight cylinder is the d=a-b=100-32=68 milliliter.H, calculating cylinder body combustion chamber volume are the d-c=68-70=-2 milliliter.The cylinder body combustion chamber volume that calculates is negative value, illustrates that this cylinder body combustor section separation structure is outside protrusion.
By measuring method of the present invention, also can obtain combustion chamber volume and the cylinder cover cushion partial combustion chamber volume of cylinder cap part, and can calculate the ratio of compression that obtains engine according to displacement per cylinder.
Specific embodiment is in order more to be expressly understood the present invention, not as a kind of restriction to right of the present invention, under the prerequisite that does not break away from aim of the present invention, various variations can be arranged, and all these will be included within the scope of this claim the apparent modification of described those skilled in the art.
Claims (10)
1. the measuring method of an engine cylinder-body combustion chamber volume is characterized in that, it comprises:
A, make piston be positioned top dead center position;
B, be enclosed in the top of cylinder body (4) with a straight cylinder (1) sealing, this straight cylinder (1) has the fixed volume value c of straight cylinder inner chamber;
C, use one transparent plate (2) are fitted mobile from the open-topped side direction opposite side of described straight cylinder (1), and use a dropper (3) to the interior drip solution body medium of described straight cylinder (1) (6) simultaneously;
D, eliminate the bubble that occurs by mobile described transparent plate (2);
E, after liquid is filled with straight cylinder (1) inner chamber the value d of liquid medium that record injects;
F, calculating cylinder body combustion chamber volume v=d-c.
2. measuring method according to claim 1 is characterized in that: the value of liquid medium that described record injects comprises: the termination value b of the original volume value a that records the dropper liquid medium before instillation dropper liquid medium when stopping to instil; The described value d=a-b that injects liquid medium.
3. measuring method according to claim 1 and 2, it is characterized in that: described liquid medium (6) is oil or water.
4. measuring method according to claim 1 and 2, it is characterized in that: described straight cylinder (1) is provided with the mounting flange (101) corresponding with the fixing threaded hole of described cylinder body (4) upper cylinder cover; Described straight cylinder (1) is fixed on the described cylinder body (4) by bolt (102); The end face of described straight cylinder (1) exceeds the end face of the fixing described bolt in back (102).
5. measuring method according to claim 3, it is characterized in that: described straight cylinder (1) is provided with the mounting flange (101) corresponding with the fixing threaded hole of described cylinder body (4) upper cylinder cover; Described straight cylinder (1) is fixed on the described cylinder body (4) by bolt (102); The end face of described straight cylinder (1) exceeds the end face of the fixing described bolt in back (102).
6. measuring method according to claim 4, it is characterized in that: the internal diameter of described straight cylinder (1) equals the internal diameter of cylinder body (4).
7. measuring method according to claim 5, it is characterized in that: the internal diameter of described straight cylinder (1) equals the internal diameter of cylinder body (4).
8. measuring method according to claim 1 and 2, it is characterized in that: described transparent plate (2) is a smooth glass plate.
9. measuring method according to claim 3, it is characterized in that: described transparent plate (2) is a smooth glass plate.
10. measuring method according to claim 4, it is characterized in that: described transparent plate (2) is a smooth glass plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100040894A CN103196512A (en) | 2013-01-07 | 2013-01-07 | Measuring method of volume of combustion chamber of cylinder block of engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100040894A CN103196512A (en) | 2013-01-07 | 2013-01-07 | Measuring method of volume of combustion chamber of cylinder block of engine |
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| CN103196512A true CN103196512A (en) | 2013-07-10 |
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| CN2013100040894A Pending CN103196512A (en) | 2013-01-07 | 2013-01-07 | Measuring method of volume of combustion chamber of cylinder block of engine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344298A (en) * | 2013-07-15 | 2013-10-09 | 上海交通大学 | Engine combustion chamber volume measuring method |
| CN103438952A (en) * | 2013-08-09 | 2013-12-11 | 浙江吉利汽车研究院有限公司 | Device and method for measuring volume of combustion chamber of cylinder body |
| FR3020458A1 (en) * | 2014-04-29 | 2015-10-30 | Peugeot Citroen Automobiles Sa | METHOD AND APPARATUS FOR MEASURING THE DEAD VOLUME OF A CYLINDER HEAD |
| CN105136231A (en) * | 2015-08-17 | 2015-12-09 | 安徽江淮汽车股份有限公司 | Piston combustion chamber measuring tool and engine combustion chamber volume measuring method |
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| KR100527942B1 (en) * | 2004-06-02 | 2005-11-09 | 현대자동차주식회사 | Device for measuring volume of combustion room of cylinder head of an automobile |
| CN101738316A (en) * | 2008-11-10 | 2010-06-16 | 北京航空航天大学 | Method for designing structure of low-cost test combustion chamber with reliable thermal protection |
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| CN202092711U (en) * | 2011-05-30 | 2011-12-28 | 哈尔滨东安汽车发动机制造有限公司 | Device for measuring capacity of combustion chamber |
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2013
- 2013-01-07 CN CN2013100040894A patent/CN103196512A/en active Pending
Patent Citations (4)
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| KR100527942B1 (en) * | 2004-06-02 | 2005-11-09 | 현대자동차주식회사 | Device for measuring volume of combustion room of cylinder head of an automobile |
| CN101738316A (en) * | 2008-11-10 | 2010-06-16 | 北京航空航天大学 | Method for designing structure of low-cost test combustion chamber with reliable thermal protection |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344298A (en) * | 2013-07-15 | 2013-10-09 | 上海交通大学 | Engine combustion chamber volume measuring method |
| CN103344298B (en) * | 2013-07-15 | 2016-12-07 | 上汽通用五菱汽车股份有限公司 | engine combustion chamber volume measuring method |
| CN103438952A (en) * | 2013-08-09 | 2013-12-11 | 浙江吉利汽车研究院有限公司 | Device and method for measuring volume of combustion chamber of cylinder body |
| CN103438952B (en) * | 2013-08-09 | 2016-04-27 | 浙江吉利汽车研究院有限公司 | The measurement mechanism of volume of combustion chamber of cylinder body and method |
| FR3020458A1 (en) * | 2014-04-29 | 2015-10-30 | Peugeot Citroen Automobiles Sa | METHOD AND APPARATUS FOR MEASURING THE DEAD VOLUME OF A CYLINDER HEAD |
| CN105136231A (en) * | 2015-08-17 | 2015-12-09 | 安徽江淮汽车股份有限公司 | Piston combustion chamber measuring tool and engine combustion chamber volume measuring method |
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Application publication date: 20130710 |
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