CN104251777B - Device and method for detecting combined errors of engine valves - Google Patents
Device and method for detecting combined errors of engine valves Download PDFInfo
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- CN104251777B CN104251777B CN201410482493.7A CN201410482493A CN104251777B CN 104251777 B CN104251777 B CN 104251777B CN 201410482493 A CN201410482493 A CN 201410482493A CN 104251777 B CN104251777 B CN 104251777B
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- lift
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Abstract
The invention provides a device and a method for detecting combined errors of an engine valves. The device comprises a computer, a follow-up detection head, a detection head support arm, a circular grating encoder and a positioning support arm, wherein the follow-up detection head is used for detecting engine valve lift movement; the detection head support arm is used for fixing the follow-up detection head; the circular grating encoder is used for detecting the change of the phase angle of an engine crankshaft; the positioning support arm is used for fixing the circular grating encoder; the detection head support arm and the positioning support arm are arranged on a case of an engine; the follow-up detection head and the circular grating encoder are connected with the computer through a data acquisition card. The device and the method provided by the invention can be used for the comprehensive detection on valve lift generated after engine assembly is finished, so that detection errors, caused by processing and assembly errors of parts, such as a camshaft, of the valve lift are avoided, and detection on the lift error of the single valve of the engine, valve timing errors and overlap angle errors of a set of valves can be realized.
Description
Technical field
The invention belongs to the field of precision measurement of complicated molded line is and in particular to a kind of detection of engine valve synthetic error fills
Put and method.
Background technology
Engine valve has large effect to the economy of electromotor, dynamic property, vibration and noise characteristic.
The Main Function of engine valve is to realize air inlet and the row of engine cylinder by time opening, closing
Gas.Engine valve unlatching, the opportunity of closure and the persistent period of unlatching, closure state have very big to the performance of electromotor
Impact.Engine air valve lift error is crossed conference and causes engine cylinder inlet and outlet resistance to increase, and aeration quantity declines, and impact is sent out
Motivation power performance, or, valve-closing is not tight, causes cylinder leakage tester, and operating pressure declines, thus leading under engine power
Fall, in addition, engine air valve lift error is excessive, also can cause cylinder air inlet not enough, fuel oil cannot burn completely, unnecessary fuel oil with
Waste gas to discharge together, the phenomenon of over-emitting black exhaust occurs.
Lifting due to engine valve is realized by camshaft, and traditional valve stroke detection mode is to remove
Engine cam, carries out molded line detection to each cam on camshaft, thus showing that its lifting curve, phase parameter etc. are believed
Breath.But, due to mismachining tolerance, the rigging error of the parts such as the abrasion of actually used process cam, camshaft and tappet, with
And the presence of the measurement error of lift, make measurement result differ larger with the actual lift of valve.
Content of the invention
It is an object of the invention to provide a kind of engine valve synthetic error detection means and method.
For reaching above-mentioned purpose, present invention employs technical scheme below:
A kind of engine valve synthetic error detection means, this detection means includes computer, data collecting card, is used for examining
Survey the servo-actuated gauge head of engine air valve lift motion, be used for fixing the gauge head support arm of described servo-actuated gauge head, being used for detecting electromotor
The disk light beam encoder of crank phase angle change and the positioning support arm for fixing described disk light beam encoder, described gauge head
Support arm and positioning support arm are arranged on the casing of electromotor, one end of data collecting card and described servo-actuated gauge head and Circular gratings
Encoder is connected, and the other end is connected with computer.
Described servo-actuated gauge head is arranged on gauge head support arm, the measuring staff top pressure of servo-actuated gauge head on engine valve spring seat,
Described measuring staff is synchronized with the movement with engine valve spring seat by flexible.
Described servo-actuated gauge head includes gauge head substrate, line slideway, spring, slide plate, measuring staff, grating scale and grating scale reading
Head, gauge head substrate is connected with described gauge head support arm, and line slideway and grating ruler reading head are arranged on gauge head substrate, and slide plate sets
Be placed on line slideway, measuring staff and grating scale are arranged on slide plate, and one end of spring is connected with slide plate, the other end be fixed on
Pedestal on gauge head substrate is connected, and grating ruler reading head is connected with computer by described data collecting card.
Described servo-actuated gauge head is one or more, the engine valve quantity phase of the quantity of servo-actuated gauge head and needs detection
With.
Described detection means also includes disk light beam encoder installing plate, one end of disk light beam encoder installing plate and Circular gratings
The mounting flange of encoder is connected, and the other end is connected with engine crankshaft exposed junction.
A kind of engine valve synthetic error detection method, comprises the following steps:
Drive engine crankshaft rotation either manually or by motor, computer passes through data collecting card synchronous acquisition two-way and detects
Data, a road detection data is the change of the phase angle of engine crankshaft of disk light beam encoder record, and number is detected on another road
According to the lift variation information of the engine valve spring seat for servo-actuated gauge head record, computer calculates gas according to two-way detection data
Door lift range error and air gate distribution phase error.
The change information of the phase angle of engine crankshaft is converted to the phase angle of engine cam by computer
Change information, and the theoretical transformation relation of the lift variation of the theoretical lift variation according to engine cam and engine valve
Obtain the theoretical lift variation information that electromotor list valve changes with engine crankshaft phase angle；Computer passes through servo-actuated survey
The lift variation information of engine valve spring seat of head record is compared with described theory lift variation information is started
The lift range error of machine list valve and air gate distribution phase error.
Described computer obtains one group of gas also by the theoretical angle overlap and actual angle overlap calculating one group of engine valve
The overlapping angle error of door.
Beneficial effects of the present invention are embodied in:
The present invention can be used for engine assembly after the completion of valve stroke comprehensive detection, it is to avoid due to camshaft etc. zero
The detection error of the valve stroke that the processing of part, rigging error cause, it is possible to achieve the lift range error of electromotor list valve, gas
Door port timing error, the detection of the overlapping angle error of one group of valve.
Brief description
Fig. 1 is the general structure schematic diagram of the present invention；
Fig. 2 is the internal structure schematic diagram of servo-actuated gauge head of the present invention；
Fig. 3 is the external structure schematic diagram of servo-actuated gauge head of the present invention；
In figure: 1 is simulated engine casing, 2 is servo-actuated gauge head, 3 is gauge head support arm, 4 is disk light beam encoder positioning
Arm, 5 be disk light beam encoder installing plate, 6 be mounting flange, 7 be disk light beam encoder, 8 be gauge head substrate, 9 be spring, 10
For high accuracy line slideway, 11 be slide plate, 12 be high-resolution gration chi, 13 be grating ruler reading head, 14 be measuring staff, 15 be send out
Motivation cotter seat, 16 be pedestal, 17 be gauge head cover plate.
Specific embodiment
With reference to the accompanying drawings and examples the present invention is elaborated.
Referring to Fig. 1, engine valve synthetic error detection means of the present invention includes computer, data collecting card, use
In the servo-actuated gauge head 2 of detection engine air valve lift motion, for fixing the gauge head support arm 3 of described servo-actuated gauge head, being used for detecting
The disk light beam encoder 7 of engine crankshaft phase angle change and the positioning support arm for fixing described disk light beam encoder
(i.e. disk light beam encoder positioning support arm 4), described gauge head support arm 3 and positioning support arm are arranged on the casing of electromotor, data
One end of capture card is connected with described servo-actuated gauge head 2 and disk light beam encoder 7, and the other end is connected with computer.Described servo-actuated
Gauge head 2 is arranged on gauge head support arm 3, and the measuring staff of servo-actuated gauge head 2 is with certain decrement top pressure in tested engine valve spring seat
On 15, described measuring staff is passed through to stretch and is synchronized with the movement with engine valve spring seat 15.Described detection means also includes Circular gratings and compiles
Code device installing plate 5, one end of disk light beam encoder installing plate 5 is connected with the mounting flange 6 of disk light beam encoder, the other end and
Engine crankshaft exposed junction is connected, and disk light beam encoder installing plate can rotate with bent axle, to realize crank phase change
Detection.
Referring to Fig. 2 and Fig. 3, described servo-actuated gauge head 2 includes gauge head substrate 8, gauge head cover plate 17 (for spelling with gauge head substrate
Close formed servo-actuated gauge head shell, protect servo-actuated gauge head other parts), high accuracy line slideway 10, spring 9, slide plate 11, survey
Bar 14, high-resolution gration chi 12 and grating ruler reading head 13, gauge head substrate 8 is connected with described gauge head support arm 3, and high accuracy is straight
Line guide rail and grating ruler reading head 13 are arranged on gauge head substrate 8, and slide plate 11 is arranged on high accuracy line slideway, and can edge
High accuracy line slideway moves up and down, and measuring staff 14 and high-resolution gration chi are arranged on slide plate 11, one end of spring 9 and cunning
Plate 11 is connected, and the other end is connected with the pedestal 16 being fixed on gauge head substrate, and grating ruler reading head 13 is by described data acquisition
Card is connected with computer.When engine valve spring seat 15 moves, measuring staff 14 passes through slide plate 11 in high accuracy line slideway 10
On motion and spring 9 effect realize flexible servo-actuated, when slide plate 11 move, grating ruler reading head 13 and high-resolution light
Grid chi 12 cooperation completes collection and the output of measuring staff movement change amount.
Described servo-actuated gauge head 2 is one or more, the engine valve quantity phase of the quantity of servo-actuated gauge head 2 and needs detection
With to detect multiple valves simultaneously.
Based on the engine valve synthetic error detection method of above-mentioned engine valve synthetic error detection means, including with
Lower step:
Drive engine crankshaft rotation either manually or by motor, bent axle drives cam axle, the cam of camshaft passes through
Direct or indirect top pressure spring seat drives the lifting of valve, and computer detects number by data collecting card synchronous acquisition two-way
According to a road detection data is the change of the phase angle of engine crankshaft of disk light beam encoder 7 record, another road detection data
The lift variation information of the engine valve spring seat recording for servo-actuated gauge head 2, i.e. the lift variation information of valve, computer
Analyzing software system calculates valve stroke error and air gate distribution phase error according to two-way detection data.
Specifically, the change information of the phase angle of engine crankshaft is converted to the phase of engine cam by computer
The change information of parallactic angle degree, and the theory of the lift variation of the theoretical lift variation according to engine cam and engine valve
Transformational relation obtains the theoretical lift variation information that electromotor list valve changes with engine crankshaft phase angle；Due to electromotor
The lift variation of cotter seat is equivalent to the lift variation of engine valve, and computer passes through starting servo-actuated gauge head record
The lift variation information of machine cotter seat is compared, with described theory lift variation information, the liter obtaining electromotor list valve
Journey error and air gate distribution phase error.The analyzing software system of described computer is also by calculating one group of engine valve
Theoretical angle overlap and actual angle overlap obtain the overlapping angle error of one group of valve.
Embodiment
A kind of engine valve synthetic error detection means, including disk light beam encoder, disk light beam encoder installing plate, with
Dynamic gauge head, gauge head support arm, disk light beam encoder positioning support arm and computer and analyzing software system.The installation of disk light beam encoder
Ring flange is installed on disk light beam encoder installing plate, and disk light beam encoder installing plate is installed on the exposed junction of engine crankshaft,
Phase angle for measuring tested engine crankshaft changes.Disk light beam encoder installing plate and the exposed junction bolt of engine crankshaft
Connect so that the centre of gyration of disk light beam encoder is overlapped with the centre of gyration of engine crankshaft.Disk light beam encoder positions support arm
Be installed on engine housing, for disk light beam encoder phase angle positioning it is ensured that during crank up, Circular gratings
Encoder shell does not turn round with bent axle.Gauge head support arm is fixed on engine housing, as the supporting construction of servo-actuated gauge head, with
Dynamic gauge head is installed on gauge head support arm, and the measuring staff of servo-actuated gauge head is with certain decrement top pressure in the corresponding bullet of tested engine valve
On spring abutment.
In servo-actuated gauge head, grating ruler reading head and high accuracy line slideway are placed on gauge head substrate, and slide plate is placed in high accuracy
On line slideway, and can move up and down along high accuracy line slideway, measuring staff and grating scale are placed on slide plate, and spring is placed in pedestal
And slide plate between.
Often set engine valve synthetic error detection means can need to be equipped with to cover servo-actuated survey according to valve quantity or detection more
Head, gauge head support arm, reach the purpose simultaneously detecting multiple valve synthetic error.
Tested engine crankshaft can be manually rotated, and also can be rotated by motor.The data that capture card is collected by
The analyzing software system of computer is analyzed processing, calculate the lift range error of single valve, air gate distribution phase error, one
The overlapping angle error of group valve.
In detection process, rotate either manually or by motor belt motor dynamic crankshaft, bent axle drives cam axle, the cam of camshaft
Drive the lifting of valve by direct or indirect top pressure spring seat.The change of the phase angle of disk light beam encoder record bent axle
Change, and be acquired by computer by capture card, meanwhile, the lift variation information of the corresponding spring base of tested valve is valve
Lift variation information pass through servo-actuated gauge head record, realize synchronously adopting with the computer of phase angle change information by capture card
Collection.Finally, by the lift range error of the single valve of analyzing software system realization of computer, air gate distribution phase error, one group of valve
Angle overlap error-detecting.
In actual transmission, bent axle passes through specific gear ratio and drives cam axle, and the lift of camshaft is further through spy
Fixed drive mechanism is transferred on engine valve, in actual measurement, the phase of the bent axle that disk light beam encoder is recorded by computer
Position change is converted to the phase place change of camshaft, due to being rigidly connected between spring base and valve, servo-actuated gauge head record
The lift variation of spring base is the lift variation of engine valve.
Because the lift variation of engine cam is converted to the lift variation of valve by certain ratio, by software
Calculate, the lift variation of camshaft can be converted to the lift variation of valve, change and camshaft in conjunction with by crank phase angle
The transformational relation of phase angle change, can obtain the theoretical lift variation information of valve, by itself and actual lift change information
Relatively, can get lift range error and the air gate distribution phase error of single valve, the detection data using one group of valve is further
The overlapping angle error of one group of valve can also be obtained.
Claims (6)
1. a kind of engine valve synthetic error detection means it is characterised in that: this detection means includes computer, data acquisition
Card, for detect engine air valve lift motion servo-actuated gauge head (2), for fix described servo-actuated gauge head gauge head support arm (3),
For detecting the disk light beam encoder (7) of engine crankshaft phase angle change and being used for fixing described disk light beam encoder
Positioning support arm, described gauge head support arm (3) and positioning support arm are arranged on the casing of electromotor, one end of data collecting card and institute
State servo-actuated gauge head (2) and disk light beam encoder (7) is connected, the other end is connected with computer；
Described servo-actuated gauge head (2) is arranged on gauge head support arm (3), and the measuring staff top pressure of servo-actuated gauge head (2) is in engine valve spring
On seat (15), described measuring staff is passed through to stretch and is synchronized with the movement with engine valve spring seat (15)；
Described servo-actuated gauge head (2) includes gauge head substrate (8), line slideway, spring (9), slide plate (11), measuring staff (14), grating scale
And grating ruler reading head (13), gauge head substrate (8) is connected with described gauge head support arm (3), line slideway and grating scale reading
Head (13) is arranged on gauge head substrate (8), and slide plate (11) is arranged on line slideway, and measuring staff (14) and grating scale are arranged at cunning
On plate (11), one end of spring (9) is connected with slide plate (11), and the other end is connected with the pedestal (16) being fixed on gauge head substrate,
Grating ruler reading head (13) is connected with computer by described data collecting card；
Synchronous acquisition two-way detection data, a road detection data is the phase angle of the engine crankshaft of disk light beam encoder record
Change, another road detection data is the lift variation information of the engine valve spring seat of servo-actuated gauge head record；
The change information of the phase angle of engine crankshaft is converted to the change information of the phase angle of engine cam, and
Theoretical lift variation according to engine cam obtains electromotor with the theoretical transformation relation of the lift variation of engine valve
The theoretical lift variation information that single valve changes with engine crankshaft phase angle；By by the engine air of servo-actuated gauge head record
The lift variation information of door spring base is compared the lift obtaining electromotor list valve by mistake with described theory lift variation information
Difference and air gate distribution phase error.
2. according to claim 1 a kind of engine valve synthetic error detection means it is characterised in that: described servo-actuated gauge head
(2) it is one or more, the quantity of servo-actuated gauge head (2) is identical with the engine valve quantity needing detection.
3. according to claim 1 a kind of engine valve synthetic error detection means it is characterised in that: described detection means
Also include disk light beam encoder installing plate (5), one end of disk light beam encoder installing plate (5) and the Method for Installation of disk light beam encoder
Blue disk (6) is connected, and the other end is connected with engine crankshaft exposed junction.
4. a kind of engine valve synthetic error detection side of engine valve synthetic error detection means as claimed in claim 1
Method it is characterised in that: comprise the following steps:
Drive engine crankshaft rotation either manually or by motor, computer detects number by data collecting card synchronous acquisition two-way
According to a road detection data is the change of the phase angle of engine crankshaft of disk light beam encoder record, another road detection data
For the lift variation information of the engine valve spring seat of servo-actuated gauge head record, computer is according to two-way detection data calculating valve
Lift range error and air gate distribution phase error.
5. method according to claim 4 it is characterised in that: the change of the phase angle of engine crankshaft is believed by computer
Breath be converted to engine cam phase angle change information, and the theoretical lift variation according to engine cam with
The theoretical transformation relation of the lift variation of motivation valve obtains the reason that electromotor list valve changes with engine crankshaft phase angle
By lift variation information；Computer pass through by the lift variation information of the engine valve spring seat of servo-actuated gauge head record with described
Theoretical lift variation information is compared the lift range error obtaining electromotor list valve and air gate distribution phase error.
6. method according to claim 4 it is characterised in that: described computer is also by calculating one group of engine valve
Theoretical angle overlap and actual angle overlap obtain the overlapping angle error of one group of valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410482493.7A CN104251777B (en) | 2014-09-19 | 2014-09-19 | Device and method for detecting combined errors of engine valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410482493.7A CN104251777B (en) | 2014-09-19 | 2014-09-19 | Device and method for detecting combined errors of engine valves |
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| Publication Number | Publication Date |
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| CN104251777A CN104251777A (en) | 2014-12-31 |
| CN104251777B true CN104251777B (en) | 2017-02-01 |
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| CN201410482493.7A Expired - Fee Related CN104251777B (en) | 2014-09-19 | 2014-09-19 | Device and method for detecting combined errors of engine valves |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105773129B (en) * | 2016-04-21 | 2018-02-06 | 云南酷锐设备研发有限公司 | Valve Gear of Diesel intelligent detecting instrument |
| CN106370149A (en) * | 2016-11-16 | 2017-02-01 | 江西昌河汽车有限责任公司 | Engine correct time angle measuring device and detection method |
| KR101819896B1 (en) * | 2016-12-01 | 2018-02-28 | (주)모토닉 | Apparatus and Method for testing engine CVV duration mechanism |
| CN109373951A (en) * | 2018-10-31 | 2019-02-22 | 中船动力研究院有限公司 | Engine breathing lift of a valve measurement method |
| CN112097710B (en) * | 2020-09-22 | 2022-04-08 | 隆鑫通用动力股份有限公司 | Method and device for measuring valve lift |
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