CN102353416B - Synchronization pressure measurement-based cylinder cover volume detection device and method - Google Patents
Synchronization pressure measurement-based cylinder cover volume detection device and method Download PDFInfo
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- CN102353416B CN102353416B CN2011101529146A CN201110152914A CN102353416B CN 102353416 B CN102353416 B CN 102353416B CN 2011101529146 A CN2011101529146 A CN 2011101529146A CN 201110152914 A CN201110152914 A CN 201110152914A CN 102353416 B CN102353416 B CN 102353416B
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Abstract
The invention discloses a synchronization pressure measurement-based cylinder cover volume detection device and a method, which are characterized in that: an air source unit is respectively provided with a first cylinder and a second cylinder, a first cylinder piston rod and a second cylinder piston rod are linkage bodies, and the linkage makes the rod cavities of the first and the second cylinders discharge equivalent gas; a measured unit is a closed combustion chamber body which is formed by a cover plate and a cylinder cover, and the combustion chamber body is communicated with the rod cavity of the first cylinder; a standard unit is a container with a standard volume, and the standard container is communicated with the rod cavity of the second cylinder; the standard unit is in the same environment state as the measured unit; and barometers of the measured unit and the standard unit are respectively arranged on a first gas pipeline and a second gas pipeline. The invention synchronously fills equivalent gas to the measured volume and the standard volume, meanwhile, the gas pressures of the measured volume and the standard volume are measured, the measured volume is calculated through the gas state equation, and the influence of the medium temperature on the measurement precision when an inflation method is adopted for measuring the volume is avoided.
Description
Technical field
The present invention relates to cylinder cover device for measuring volume and method.
Background technology
At present, the general method that adopts of detection for the engine cylinder cover chamber volume has: titrimetry, aeration and elastic capsule topping up method etc.Titrimetry is measured poor accuracy, detection time is long, manually-operated is loaded down with trivial details; Directly aeration is simple to operate, but measuring accuracy is influenced by ambient temperature very big; Elastic capsule topping up method in use elastic capsule needs often to change, and operation is trouble comparatively.
Summary of the invention
The present invention is for avoiding above-mentioned existing in prior technology weak point; Provide a kind of with the cylinder cover device for measuring volume and the method based on the simultaneous pressure measurement of gas as measuring media; Medium temperature improves measuring accuracy to the influence of measuring accuracy when measuring in the hope of overcoming aeration.
Technical solution problem of the present invention adopts following technical scheme:
The design feature that the present invention is based on the cylinder cover device for measuring volume of simultaneous pressure measurement is to comprise:
Gas source unit: first cylinder and second cylinder are set respectively; First cylinder piston rod and second cylinder piston rod are the interlock body, and the interlock of said first cylinder piston rod and second cylinder piston rod makes the gas of discharging equivalent at the rod chamber of first cylinder and second cylinder as source of the gas;
Unit under test: form the firing chamber cavity that seals to have the cover plate and the cylinder head that connect through hole, said firing chamber cavity is communicated with the rod chamber of first cylinder through first gas pipe line, forms unit under test;
Reference cell: the volume receptacle that sets up standard, said volumetric standard is communicated with the formation reference cell through second gas pipe line with the rod chamber of second cylinder; Said reference cell and unit under test are in the same ambient condition;
Display unit: unit under test rain glass and reference cell rain glass are set respectively on said first gas pipe line and second gas pipe line.
The characteristics of the method that the cylinder cover device for measuring volume that utilization of the present invention is measured based on simultaneous pressure detects are interlock first cylinder piston rod and second cylinder piston rod; Make win cylinder and second cylinder synchronously to unit under test and reference cell air feed; Obtain unit under test rain glass and the barometric demonstration atmospheric pressure value of reference cell, calculate the volume of firing chamber cavity again according to the equation of gas state.
Compared with present technology, beneficial effect of the present invention is embodied in:
The present invention is to be measuring media with gas; Synchronously tested volume and orthobaric volume are charged into equivalent gas; And measure the gaseous tension in tested volume and the orthobaric volume simultaneously; Calculate the method for tested volume according to the equation of gas state, medium temperature is to the influence of measuring accuracy when measuring principle has overcome that aeration is measured volume, and it is simple to operate, measuring accuracy is high.
Description of drawings
Fig. 1 is a principle of the invention synoptic diagram;
Label among the figure: 1 first cylinder; 2 second cylinders; 3 strap joints; 4 cover plates; 5 cover plate for sealing circles; 6 inlet valve plugs; 7 cylinder covers; 8 spark-plug hole plugs; 9 exhaust valve plugs; 10 firing chamber cavitys; 11 volumetric standards; 12 first gas pipe lines; 13 second gas pipe lines; 14 connect through hole; 15 unit under test rain glasss, 16 reference cell rain glasss.
Embodiment
Referring to Fig. 1, the cylinder cover device for measuring volume of measuring based on simultaneous pressure in the present embodiment comprises:
Gas source unit: first cylinder 1 and second cylinder 2 are set respectively; First cylinder piston rod and second cylinder piston rod are the interlock body, and the interlock of first cylinder piston rod and second cylinder piston rod makes gas in the rod chamber of first cylinder 1 and second cylinder 2 discharge equivalent as source of the gas; To be first cylinder be set to second cylinder that cylinder bore diameter equates in practical implementation, the equal diameters of first cylinder piston rod and second cylinder piston rod.
Unit under test: form the firing chamber cavity 10 that seals to have the cover plate 4 that connects through hole 14 with cylinder head 7, firing chamber cavity 10 is communicated with the rod chamber of first cylinder 1 through first gas pipe line 12, forms unit under test;
Reference cell: the volume receptacle 11 that sets up standard, volumetric standard 11 is communicated with the formation reference cell through second gas pipe line 13 with the rod chamber of second cylinder 2; Reference cell and unit under test are in the same ambient condition;
Display unit: unit under test rain glass 15 and reference cell rain glass 16 are set respectively on first gas pipe line 12 and second gas pipe line 13.
During MEASUREMENT OF STEAM cylinder cap volume; At first respectively cylinder cover inlet valve port, exhaust doorway and spark-plug hole are blocked with inlet valve plug 6, exhaust valve plug 9 and spark-plug hole plug 8; Again cover plate 4 is covered the mouth door of cylinder cover 7 and compress; Seal with O-ring seal 5 between cover plate 4 and the cylinder cover 7, form firing chamber cavity 10 at this moment between the combustor surface of cover plate 4 and cylinder cover 7; The rod chamber of first cylinder 1 is connected with firing chamber cavity 10 through the connection through hole 14 on first gas pipe line 12, strap joint 3 and the cover plate 4; The rod chamber of second cylinder 2 is connected with volumetric standard 11 through second gas pipe line 13; Unit under test rain glass 15 is arranged in first gas pipe line 12, is used for measuring the pressure of first gas pipe line 12; Reference cell rain glass 16 is arranged in second gas pipe line 13, is used for measuring the pressure of second gas pipe line 13;
Accurately the set up standard volume of container 11, make volumetric standard 11 volume and be attached thereto the volume sum that the volume sum of the second logical gas pipe line 13 equals the theoretical displacement of firing chamber cavity 10 and is attached thereto the first logical gas pipe line 12;
Drive the piston rod of first cylinder 1 and second cylinder 2; Make win cylinder 1 and second cylinder 2 respectively to firing chamber cavity 10 and volumetric standard 11 synchronous air feed; Firing chamber cavity 10 raises with volumetric standard 11 interior gaseous tensions; Piston rod until cylinder 1 and cylinder 2 arrives desired location, according to this moment unit under test rain glass 15 measure the gas pressure value of unit under test and reference cell with reference cell rain glass 16, calculate the volume of firing chamber cavity 10 by the equation of gas state.Because firing chamber cavity 10 is in the same atmospheric environment with gaseous tensions in the volumetric standard 11 all the time,, thereby can not influence measuring accuracy so the environmental gas temperature variation is synchronous to the influence of the gas pressure value of unit under test and reference cell.
In the practical implementation; The rod chamber volume that first cylinder 1 and second cylinder 2 can be set equals firing chamber cavity 10 and first gas pipe line, 12 volume sums five times, and first cylinder 1 and the initial position of second cylinder 2 before measurement are the maximum positions of rod chamber volume.The volume of container 11 of setting up standard equals the theoretical value of firing chamber cavity 10 volumes, and first gas pipe line 12 is the identical and equal in length of specification with second gas pipe line 13; Driving the piston rod of first cylinder 1 and second cylinder 2, is zero until the rod chamber volume; If the volume of firing chamber cavity 10 is V
1, the volume of first gas pipe line 12 and second gas pipe line 13 is given value V
2, the volume of volumetric standard 11 is V
0, the reading of unit under test rain glass 15 is P
1, the reading of reference cell rain glass 16 is P
2, according to equation of gas state P
1(V
1+ V
0)=P
2(V
2+ V
0) draw:
Claims (2)
1. cylinder cover device for measuring volume of measuring based on simultaneous pressure is characterized in that comprising:
Gas source unit: first cylinder (1) and second cylinder (2) are set respectively; First cylinder piston rod and second cylinder piston rod are the interlock body, and the interlock of said first cylinder piston rod and second cylinder piston rod makes gas in the rod chamber of first cylinder (1) and second cylinder (2) discharge equivalent as source of the gas;
Unit under test: form the firing chamber cavity (10) that seals to have the cover plate (4) that connects through hole with cylinder head (7), said firing chamber cavity (10) is communicated with the rod chamber of first cylinder (1) through first gas pipe line (12), forms unit under test;
Reference cell: the volume receptacle that sets up standard (11), said volumetric standard (11) is communicated with the formation reference cell through second gas pipe line (13) with the rod chamber of second cylinder (2); Said reference cell and unit under test are in the same ambient condition;
Display unit: on said first gas pipe line (12) and second gas pipe line (13), unit under test rain glass (15) and reference cell rain glass (16) are set respectively.
2. one kind is utilized the described method that detects based on the cylinder cover device for measuring volume of simultaneous pressure measurement of claim 1; First cylinder piston rod and second cylinder piston rod is characterized in that linking; Make cylinder of winning (1) and second cylinder (2) synchronously to unit under test and reference cell air feed; Obtain the demonstration atmospheric pressure value of unit under test rain glass (15) and reference cell rain glass (16), calculate the volume of firing chamber cavity (10) again according to the equation of gas state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101529146A CN102353416B (en) | 2011-06-08 | 2011-06-08 | Synchronization pressure measurement-based cylinder cover volume detection device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101529146A CN102353416B (en) | 2011-06-08 | 2011-06-08 | Synchronization pressure measurement-based cylinder cover volume detection device and method |
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| Publication Number | Publication Date |
|---|---|
| CN102353416A CN102353416A (en) | 2012-02-15 |
| CN102353416B true CN102353416B (en) | 2012-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101529146A Expired - Fee Related CN102353416B (en) | 2011-06-08 | 2011-06-08 | Synchronization pressure measurement-based cylinder cover volume detection device and method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111896067B (en) * | 2020-08-05 | 2022-04-12 | 中车青岛四方车辆研究所有限公司 | Air cylinder, volume measurement system and volume measurement method |
| CN113310699A (en) * | 2021-07-08 | 2021-08-27 | 上腾科技(广州)有限公司 | Engine cylinder parameter measuring method, measuring system and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101000259A (en) * | 2006-12-31 | 2007-07-18 | 合肥工业大学 | Device for measuring volume of engine cylinder head combustion chamber |
| CN101458107A (en) * | 2008-10-17 | 2009-06-17 | 奇瑞汽车股份有限公司 | Device for measuring engine cylinder cover chamber volume and measurement method thereof |
| CN202119499U (en) * | 2011-06-08 | 2012-01-18 | 合肥工业大学 | Cylinder cover volume detecting device based on synchronous pressure measurement |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE0102037D0 (en) * | 2001-06-08 | 2001-06-08 | Lars Stenmark | Advanced volume gauging device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101000259A (en) * | 2006-12-31 | 2007-07-18 | 合肥工业大学 | Device for measuring volume of engine cylinder head combustion chamber |
| CN101458107A (en) * | 2008-10-17 | 2009-06-17 | 奇瑞汽车股份有限公司 | Device for measuring engine cylinder cover chamber volume and measurement method thereof |
| CN202119499U (en) * | 2011-06-08 | 2012-01-18 | 合肥工业大学 | Cylinder cover volume detecting device based on synchronous pressure measurement |
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| CN102353416A (en) | 2012-02-15 |
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