CN103759937A - Method for detecting synchronization of double overhead camshafts - Google Patents
Method for detecting synchronization of double overhead camshafts Download PDFInfo
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- CN103759937A CN103759937A CN201310750112.4A CN201310750112A CN103759937A CN 103759937 A CN103759937 A CN 103759937A CN 201310750112 A CN201310750112 A CN 201310750112A CN 103759937 A CN103759937 A CN 103759937A
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- head camshaft
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Abstract
The invention discloses a method for detecting synchronization of double overhead camshafts. The method for detecting synchronization of double overhead camshafts comprises the detail detecting steps that first two percent meters or two micrometer gauges for detecting the synchronization of the double overhead camshafts are fixed to two different camshafts on the same valve of the same cylinder, contact points are in contact with the camshafts, and zero setting is conducted after the highest point positions are found. Then, a crank shaft is rotated for a circle, it is observed whether the two percent meters or two micrometer gauges return to the zero positions at the same time. When the two percent meters or two micrometer gauges return to the zero positions at the same time, it shows that the double overhead camshafts work in the synchronized mode. According to the method for detecting synchronization of double overhead camshafts, the detecting steps are simple and reasonable, the percent meters are adopted to detect the positions of the cam profiles, after an engine is assembled, under the condition that valve mechanism parts do not need to be disassembled, the synchronization of the double overhead camshafts can be directly and fast detected, and therefore accuracy and efficiency are both high.
Description
Technical field
The present invention relates to camshaft synchronism detection field, particularly a kind of Dual Over Head Camshaft synchronism detection method.
Background technology
Dual Over Head Camshaft is applied more and morely on engine in recent years, generally by the driving gear on a camshaft, drives another root that the camshaft of follower gear is housed, and realizes the synchronous working of twin cam shaft.This just require related components processing, the synchronism of location very accurate guarantee two camshafts is installed, otherwise cause asynchronously by the valve opening of two camshaft actuated respectively, cause the abnormal occurrencies such as engine operation emergent power deficiency.
DOHC engine characteristics of compact layout cannot be determined by detecting valve opening situation when suspecting that camshaft work is asynchronous, whether synchronously can only detect camshaft work by dismounting valve actuating mechanism parts detection relative dimensions and port timing.But while detecting relative dimensions and port timing after dismounting valve actuating mechanism parts, virtually got rid of the aspects such as assembling and caused the nonsynchronous possibility of camshaft work, the efficiency and the accuracy that detect all be can not be guaranteed.
Summary of the invention
The present invention is in order to overcome defect in above-mentioned prior art, a kind of detecting step advantages of simple is provided, can be after engine assembly complete, do not need to dismantle direct-detection in the situation of valve actuating mechanism parts, all high Dual Over Head Camshaft synchronism detection methods of accuracy and efficiency.
For achieving the above object, according to the invention provides a kind of Dual Over Head Camshaft synchronism detection method, concrete detecting step comprises:
First, two dial gauges or two clock gauges for detection of Dual Over Head Camshaft synchronism are fixed on two different cams of the same valve of same cylinder, contact contacts with cam, returns to zero after finding peak position;
Then, turning crankshaft one encloses, and observes two dial gauges or whether two clock gauges are returned to zero-bit simultaneously;
When two dial gauges or two clock gauges are returned to zero-bit simultaneously, represent that Dual Over Head Camshaft work is synchronous.
In technique scheme, with each cylinder of the engine of this Dual Over Head Camshaft, all there is two inlet valves and double valve.
In technique scheme, two dial gauges or two clock gauges are separately fixed on the cylinder body of same cylinder, and being positioned at two inlet valve cams or two exhaust valve cam one sides, the gauge head contact of two dial gauges or two clock gauges contacts with two inlet valve cams or two exhaust valve cams respectively.
In technique scheme, dial gauge is to utilize rack pinion or lever-gear transmission, the straight-line displacement of measuring staff is become to the measurement instrument of the angular displacement of pointer.
Compared with prior art, the present invention has following beneficial effect: this Dual Over Head Camshaft synchronism detection method detecting step advantages of simple, adopt the position of centimeter check cam profile, can be after engine assembly completes, do not need to dismantle in the situation of valve actuating mechanism parts and detect directly, fast Dual Over Head Camshaft synchronism, accuracy and efficiency is all high.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of Dual Over Head Camshaft synchronism detection method of the present invention.
Embodiment
Below in conjunction with accompanying drawing, a specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention is not subject to the restriction of embodiment.It will be appreciated that, mentioned in following embodiment of the present invention " on ", D score, " left side ", " right side ", " front " and " reverse side " be all take the direction shown in each figure as benchmark, these words that are used for limiting direction are only used to be convenient to explanation, do not represent the restriction to the concrete technical scheme of the present invention.
Dual Over Head Camshaft synchronism detection method detecting step advantages of simple of the present invention, adopt the position of centimeter check cam profile, can be after engine assembly completes, do not need to dismantle in the situation of valve actuating mechanism parts and detect directly, fast Dual Over Head Camshaft synchronism, accuracy and efficiency is all high.
Detailed description by way of example but unrestriced mode has illustrated the disclosure, should be understood that the realization that can be combined by independent realization or with other aspects in various aspect of the present disclosure below.This instructions clearly enables those skilled in the art to manufacture and uses us to believe for new and non-obvious improvement, describe some embodiment, alternative, modification, alternatives and system applies, comprised the current best mode that is considered to carry out the inventive principle of describing in this instructions.When describing element or feature and/or embodiment, titled with " one " " one " " be somebody's turn to do " and " described ", be intended to expression and there are one or more in element or feature.Term " comprises " that " comprising " and " having " is intended to is comprising property, and also has extra element or feature beyond being illustrated in those specifically described elements or feature.
As shown in Figure 1, this Dual Over Head Camshaft synchronism detection method change can only be dismantled valve actuating mechanism parts in the past and be detected, and can after engine assembly completes, detect directly, fast Dual Over Head Camshaft synchronism, and concrete detecting step is:
First, two dial gauges or two clock gauges for detection of Dual Over Head Camshaft synchronism are fixed on two different cams of the same valve of same cylinder, contact contacts with cam, returns to zero after finding peak position;
Adopt each cylinder of the engine of this Dual Over Head Camshaft all to there is two inlet valves and double valve, two inlet valves are driven respectively by the inlet valve cam of Dual Over Head Camshaft respectively, and two exhaust valves are also driven respectively by the exhaust valve cam of Dual Over Head Camshaft respectively.
This Dual Over Head Camshaft synchronism detection method need to adopt two dial gauges or two clock gauges, two dial gauges or two clock gauges are separately fixed on the cylinder body of same cylinder, and be located at two inlet valve cams or two exhaust valve cam one sides, make the gauge head contact of two dial gauges or two clock gauges contact (contacting with different two cams of same valve) from two inlet valve cams or two exhaust valve cams respectively, and in the peak position (the prominent sharp position of cam) of two inlet valve cams or two exhaust valve cam molded line, two dial gauges or two clock gauges are returned to zero respectively.The peak position of two inlet valve cams or two exhaust valve cam molded line is sensitive positions of cam profile optimum centimeter check camshaft synchronism, can improve the accuracy and efficiency that Dual Over Head Camshaft synchronism detects.
The principle of work of dial gauge is the small rectilinear movement of measuring staff that measured size is caused, through gear drive, amplifies, become and refer to the rotation of meter on index dial, thus the size of reading measured size.Dial gauge is to utilize rack pinion or lever-gear transmission, the straight-line displacement of measuring staff is become to the measurement instrument of the angular displacement of pointer.Conventionally by gauge head, gauge rod, antirattle spring, tooth bar, gear, hairspring, round dial and pointer etc., formed.Dial gauge is that the B.C. Ames of the U.S. was made in 1890.Be usually used in the linear measure longimetry of Geometrical Error and little displacement.On the round dial of dial gauge, be printed with 100 evenly divideds, each scale division value is equivalent to gauge rod and moves 0.01 millimeter.If be printed with 1000 evenly divideds on round dial, each scale division value is 0.001 millimeter, and this survey instrument is called clock gauge.
Then, turning crankshaft one encloses, and observes two dial gauges or whether two clock gauges are returned to zero-bit simultaneously;
When two dial gauges or two clock gauges are returned to zero-bit simultaneously, represent that Dual Over Head Camshaft work is synchronous;
When two dial gauges or two clock gauges are not returned to zero-bit, represent that Dual Over Head Camshaft work is asynchronous.
To sum up, this Dual Over Head Camshaft synchronism detection method detecting step advantages of simple, adopt the position of centimeter check cam profile, can be after engine assembly completes, do not need to dismantle in the situation of valve actuating mechanism parts and detect directly, fast Dual Over Head Camshaft synchronism, accuracy and efficiency is all high.
Disclosed is above only several specific embodiment of the present invention, and still, the present invention is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (4)
1. a Dual Over Head Camshaft synchronism detection method, is characterized in that, concrete detecting step comprises:
First, two dial gauges or two clock gauges for detection of Dual Over Head Camshaft synchronism are fixed on two different cams of the same valve of same cylinder, contact contacts with cam, returns to zero after finding peak position;
Then, turning crankshaft one encloses, and observes two dial gauges or whether two clock gauges are returned to zero-bit simultaneously;
When two dial gauges or two clock gauges are returned to zero-bit simultaneously, represent that Dual Over Head Camshaft work is synchronous.
2. Dual Over Head Camshaft synchronism detection method according to claim 1, is characterized in that: each cylinder with the engine of this Dual Over Head Camshaft all has two inlet valves and double valve.
3. Dual Over Head Camshaft synchronism detection method according to claim 2, it is characterized in that: described two dial gauges or two clock gauges are separately fixed on the cylinder body of same cylinder, and being positioned at two inlet valve cams or two exhaust valve cam one sides, the gauge head contact of described two dial gauges or two clock gauges contacts with two inlet valve cams or two exhaust valve cams respectively.
4. according to the Dual Over Head Camshaft synchronism detection method described in any one in claims 1 to 3, it is characterized in that: described dial gauge is to utilize rack pinion or lever-gear transmission, the straight-line displacement of measuring staff is become to the measurement instrument of the angular displacement of pointer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310750112.4A CN103759937B (en) | 2013-12-31 | 2013-12-31 | Dual Over Head Camshaft synchronism detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310750112.4A CN103759937B (en) | 2013-12-31 | 2013-12-31 | Dual Over Head Camshaft synchronism detection method |
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| Publication Number | Publication Date |
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| CN103759937A true CN103759937A (en) | 2014-04-30 |
| CN103759937B CN103759937B (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310750112.4A Active CN103759937B (en) | 2013-12-31 | 2013-12-31 | Dual Over Head Camshaft synchronism detection method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105180780A (en) * | 2015-08-10 | 2015-12-23 | 安徽江淮汽车股份有限公司 | Engine gas distribution phase detection apparatus and method |
| CN107655695A (en) * | 2017-10-27 | 2018-02-02 | 北京精密机电控制设备研究所 | A kind of double cam closed loop feedback measurement apparatus |
| CN108072512A (en) * | 2016-11-14 | 2018-05-25 | 郑州飞机装备有限责任公司 | A kind of method of movement parts start synchronism measurement |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB854498A (en) * | 1956-01-24 | 1960-11-23 | Birmingham Small Arms Co Ltd | Improvements in or relating to the gauging of cam profiles |
| US4509267A (en) * | 1983-03-07 | 1985-04-09 | Tobin-Arp Manufacturing Company | Preset indicator assembly |
| CN102252851A (en) * | 2011-06-29 | 2011-11-23 | 重庆银钢汽车配件制造有限责任公司 | Tool special for checking cam shaft on line |
| CN102384707A (en) * | 2011-08-11 | 2012-03-21 | 镇江中船设备有限公司 | Cam lift measurement device |
-
2013
- 2013-12-31 CN CN201310750112.4A patent/CN103759937B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB854498A (en) * | 1956-01-24 | 1960-11-23 | Birmingham Small Arms Co Ltd | Improvements in or relating to the gauging of cam profiles |
| US4509267A (en) * | 1983-03-07 | 1985-04-09 | Tobin-Arp Manufacturing Company | Preset indicator assembly |
| CN102252851A (en) * | 2011-06-29 | 2011-11-23 | 重庆银钢汽车配件制造有限责任公司 | Tool special for checking cam shaft on line |
| CN102384707A (en) * | 2011-08-11 | 2012-03-21 | 镇江中船设备有限公司 | Cam lift measurement device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105180780A (en) * | 2015-08-10 | 2015-12-23 | 安徽江淮汽车股份有限公司 | Engine gas distribution phase detection apparatus and method |
| CN108072512A (en) * | 2016-11-14 | 2018-05-25 | 郑州飞机装备有限责任公司 | A kind of method of movement parts start synchronism measurement |
| CN107655695A (en) * | 2017-10-27 | 2018-02-02 | 北京精密机电控制设备研究所 | A kind of double cam closed loop feedback measurement apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103759937B (en) | 2016-01-20 |
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