CN110567698A - Testing device and method for timing and lift measurement of variable valve of engine - Google Patents
Testing device and method for timing and lift measurement of variable valve of engine Download PDFInfo
- Publication number
- CN110567698A CN110567698A CN201910880236.1A CN201910880236A CN110567698A CN 110567698 A CN110567698 A CN 110567698A CN 201910880236 A CN201910880236 A CN 201910880236A CN 110567698 A CN110567698 A CN 110567698A
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- 238000012360 testing method Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000005259 measurement Methods 0.000 title claims abstract description 9
- 230000007246 mechanism Effects 0.000 claims abstract description 35
- 238000009434 installation Methods 0.000 claims abstract description 5
- 238000005070 sampling Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 238000010998 test method Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/06—Testing internal-combustion engines by monitoring positions of pistons or cranks
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Valve Device For Special Equipments (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The invention discloses a testing device and a method for measuring a valve mechanism with variable timing and lift of an engine valve, which are carried out according to the following steps: (1) the self-control measurement test device satisfies the installation and the operation of various valves. (2) The self-made camshaft is driven by the variable frequency motor, so that the rotating speed of the camshaft is matched with the actual rotating speed of the engine. (3) The angle sensor is arranged on the rocker arm to detect the angle of the rocker arm when the valve works. And calculating the actual lift curve of the air outlet valve according to the parameters such as the rotating angle, the distance of the rocker arm and the like. (4) The opening and closing timing of the valve can be obtained by measuring curves of the original engine valve mechanism and the variable valve mechanism and combining sampling frequency.
Description
Technical Field
The invention relates to the technical field of engine valve testing devices, in particular to a testing device and method for timing and lift measurement of a variable valve of an engine.
Background
the variable valve mechanism of the diesel engine has outstanding effects on reducing oil consumption and improving exhaust temperature, and various large enterprises and research institutions carry out a lot of researches on designing the variable valve mechanism and optimizing matching, and provide valve mechanisms with different schemes. The newly designed valve mechanism needs to measure the lift and the timing of the valve, so that the characteristic of the valve mechanism is determined to meet the requirement of the matched engine.
In order to develop an efficient and reliable valve mechanism, developers often need to design a plurality of valve mechanisms with different schemes, and it is unrealistic to install each valve mechanism in an actual engine for test matching, so that the workload is large, and the incorrect design of the valve mechanisms can cause certain damage to the engine. Therefore, the invention designs the testing device, so that the newly developed valve mechanism can be quickly and conveniently installed on the testing device, and the timing and the lift of the valve mechanism can be efficiently detected.
Disclosure of Invention
The invention aims to provide a test device and a method for measuring variable valve timing and lift of an engine.
in order to achieve the purpose of the invention, the invention provides a test device for measuring the timing and the lift of a variable valve of an engine, which comprises a left support and a right support, wherein working platforms are arranged at the upper ends of the left support and the right support, an oil pan is connected at the lower end of the working platform, the oil pan is of a cavity structure and forms a sealed cavity with the working platform, a left tile frame and a right tile frame are arranged on the lower end face of the working platform in the sealed cavity, a cam shaft is arranged on the left tile frame and the right tile frame and is in sliding connection, the left end of the cam shaft penetrates through the left side wall of the oil pan and is in sliding sealing connection, a variable frequency motor is arranged on the left side of the working platform, and a motor shaft of the variable frequency motor is connected; the working platform is provided with a cylinder head, a variable valve mechanism is arranged in the cylinder head, and the lower end of the variable valve mechanism is connected with a camshaft through a tappet; an angle sensor is arranged on the cylinder head.
Further, a guide block is arranged below the working platform, longitudinal holes are formed in the working platform and the guide block, a guide sleeve is arranged in each hole, and the tappet penetrates through the guide sleeve and is connected in a sliding sealing mode.
correspondingly, the invention also provides a test method for measuring the variable valve timing and the lift of the engine, which comprises the following steps:
(1) The test device for timing and lift measurement of the variable valve of the engine is utilized to meet the installation and operation requirements of various valves;
(2) driving a self-made camshaft by a variable frequency motor to enable the rotation speed of the camshaft to be matched with the actual rotation speed of the engine;
(3) the angle sensor is arranged on the rocker arm, so that the angle of the rocker arm when the valve works is detected, and the actual lift curve of the valve is calculated;
(4) The opening and closing timing of the valve can be obtained by measuring curves of the original engine valve mechanism and the variable valve mechanism and combining sampling frequency.
Compared with the prior art, the variable valve timing and lift measuring test device has the advantages that the variable valve timing and lift measuring test device for the engine can meet the requirements of installation and operation of various valves; the opening and closing timing of the valve can be obtained by measuring curves of the original engine valve mechanism and the variable valve mechanism and combining sampling frequency.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present application;
FIG. 2 shows the original engine valve lift curve (dark color) and the variable valve lift curve (light color);
FIG. 3 is a schematic view of a hydraulic drive of the valve train;
In the figure, 1-variable frequency motor, 2-cylinder head, 3-variable valve mechanism, 4-tappet, 5-guide sleeve, 6-guide block, 7-working platform, 8-left support, 9-oil enclosure, 10-left tile frame, 11-camshaft, 12-oil pan, 13-right tile frame, 14-right support, 15-oil return port, 16-oil inlet pipe, 17-reversing valve, 18-pressure regulating valve, 19-control unit, 20-control signal and 21-hydraulic station.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
it is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when used in this specification the singular forms "a", "an" and/or "the" include "specify the presence of stated features, steps, operations, elements, or modules, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
As shown in fig. 1, the application provides a test device for measuring variable valve timing and lift of an engine, which comprises a left support 8 and a right support 14, wherein a working platform 7 is arranged at the upper ends of the left support 8 and the right support 14, an oil pan 12 is connected to the lower end of the working platform 7, the oil pan 12 is of a cavity structure and forms a sealed cavity with the working platform 7, a left tile frame 10 and a right tile frame 13 are arranged on the lower end face of the working platform 7 in the sealed cavity, a camshaft 11 is arranged on the left tile frame 10 and the right tile frame 13 and is in sliding connection, the left end of the camshaft 11 penetrates through the left side wall of the oil pan 12 and is in sliding connection, a variable frequency motor 1 is arranged on the left side of the working platform 7, and a motor shaft of the variable frequency motor 1 is connected with the camshaft 11 and drives the camshaft 11 to; the working platform 7 is provided with a cylinder head 2, a variable valve mechanism 3 is arranged in the cylinder head, and the lower end of the variable valve mechanism 3 is connected with a camshaft 11 through a tappet 4; an angle sensor is arranged on the cylinder head 2.
The above-mentioned device includes: the variable frequency motor, the cylinder head, the angle sensor, the camshaft, the tappet, the oil pan, the intake valve and the like. The variable frequency motor drives the camshaft to rotate, and the camshaft drives the valve mechanism to move. Through adjusting the converter, can adjust control to the motor speed, and then adjust control to the rotational speed of camshaft. The angle sensor is arranged on the cylinder head and is mainly used for measuring the actual rotating angle of the rocker arm. The fixed point of the rocker arm is taken as the center, and the radius from the fixed point to the actual punching measurement position is taken as the radius. And measuring the rotation angle of each circulating rocker arm by using an angle sensor, and calculating the lift S of the rocker arm by using the rotation angle S which is 2 pi R/360x and x. The tappet moves up and down and is connected with the valve mechanism and the camshaft, so that the rotary motion of the camshaft is converted into the vertical motion of the valve mechanism.
in addition, a guide block 6 is arranged below the working platform 7, longitudinal holes are formed in the working platform 7 and the guide block 6, a guide sleeve 5 is arranged in each hole, and the tappet 4 penetrates through the guide sleeve 5 and is connected in a sliding sealing mode.
the application also provides a test method for measuring the timing and the lift of the variable valve of the engine, which is carried out according to the following steps:
(1) The test device for timing and lift measurement of the variable valve of the engine is utilized to meet the installation and operation requirements of various valves;
The device for measuring the lift and the angle of the variable valve of the engine comprises a variable frequency motor, a hydraulic device (shown in figure 3) and an angle sensor. The variable frequency motor is controlled to drive the camshaft to rotate, and the rotating speed of the engine is simulated. The hydraulic device can realize the driving of the valve, and comprises a hydraulic station, wherein the hydraulic station is communicated with a cylinder cover through an oil inlet pipeline, the oil inlet pipeline is connected with a reversing valve and a pressure regulating valve, the hydraulic station is controlled by a control unit, the control unit can send a control signal to control the hydraulic station, and the hydraulic station is mainly used for providing a power source for a variable valve mechanism and providing pressure oil with appropriate pressure and flow for the valve mechanism.
when the variable valve mechanism is installed on an engine, the oil pressure of the valve mechanism is taken from the oil pressure of the engine, and the device realizes the requirement of the variable valve mechanism through a self-made hydraulic device with the pressure adjusting range of 0-200 bar.
(2) Driving a self-made camshaft by a variable frequency motor to enable the rotation speed of the camshaft to be matched with the actual rotation speed of the engine;
(3) the angle sensor is arranged on the rocker arm, so that the angle of the rocker arm when the valve works is detected, and the actual lift curve of the valve is calculated; through punching on the cylinder cap, arrange angle sensor. And punching a hole on the rocker arm, wherein a fixed point of the rocker arm is taken as a center, and the distance from the fixed point to a measuring position is taken as a radius. And measuring the rotation angle of each circulating rocker arm by using an angle sensor, and calculating the lift S of the rocker arm by using the rotation angle S which is 2 pi R/360x and x.
(4) By measuring the curves of the original and variable valve trains in conjunction with the sampling frequency, the opening and closing timing of the valve can be analyzed, see fig. 2.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (3)
1. The test device for measuring the timing and the lift of the variable valve of the engine is characterized by comprising a left support (8) and a right support (14), wherein a working platform (7) is arranged at the upper ends of the left support (8) and the right support (14), the lower end of the working platform (7) is connected with an oil pan (12), the oil pan (12) is of a cavity structure and forms a sealed cavity with the working platform (7), a left tile frame (10) and a right tile frame (13) are arranged on the lower end face of the working platform (7) in the sealed cavity, a cam shaft (11) is arranged on the left tile frame (10) and the right tile frame (13) and is in sliding connection, the left end of the cam shaft (11) penetrates through the left side wall of the oil pan (12) and is in sliding sealing connection, a variable frequency motor (1) is arranged on the left side of the working platform (7), and a motor shaft of the variable frequency motor (1) is connected with the, and drives the camshaft (11) in rotation; the working platform (7) is provided with a cylinder head (2), a variable valve mechanism (3) is arranged in the cylinder head, and the lower end of the variable valve mechanism (3) is connected with a camshaft (11) through a tappet (4); an angle sensor is arranged on the cylinder head (2).
2. the testing device for the variable valve timing and lift measurement of the engine according to the claim 1, characterized in that a guide block (6) is arranged below the working platform (7), the working platform (7) and the guide block (6) are provided with longitudinal holes, a guide sleeve (5) is arranged in the holes, and the tappet (4) penetrates through the guide sleeve (5) and is connected in a sliding and sealing manner.
3. A test method for variable valve timing and lift measurement of an engine, characterized in that the method is performed according to the following steps:
(1) the test device for measuring the timing and the lift of the variable valve of the engine according to claim 1 is used for meeting the installation and operation of various valves;
(2) Driving a self-made camshaft by a variable frequency motor to enable the rotation speed of the camshaft to be matched with the actual rotation speed of the engine;
(3) The angle sensor is arranged on the rocker arm, so that the angle of the rocker arm when the valve works is detected, and the actual lift curve of the valve is calculated;
(4) The opening and closing timing of the valve can be obtained by measuring curves of the original engine valve mechanism and the variable valve mechanism and combining sampling frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910880236.1A CN110567698A (en) | 2019-09-18 | 2019-09-18 | Testing device and method for timing and lift measurement of variable valve of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910880236.1A CN110567698A (en) | 2019-09-18 | 2019-09-18 | Testing device and method for timing and lift measurement of variable valve of engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110567698A true CN110567698A (en) | 2019-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910880236.1A Pending CN110567698A (en) | 2019-09-18 | 2019-09-18 | Testing device and method for timing and lift measurement of variable valve of engine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112763198A (en) * | 2020-12-28 | 2021-05-07 | 国营第六一六厂 | Camshaft bending fatigue test device |
| CN113983899A (en) * | 2021-11-22 | 2022-01-28 | 中国第一汽车股份有限公司 | Method for testing variable valve lift mechanism |
| WO2023072162A1 (en) * | 2021-10-28 | 2023-05-04 | 中国第一汽车股份有限公司 | Cvvl valve lift measurement apparatus and measurement method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040069259A1 (en) * | 2002-10-14 | 2004-04-15 | Ford Global Technologies, Inc. | Variable lift cylinder valve system for internal combustion engine |
| CN102393302A (en) * | 2011-08-02 | 2012-03-28 | 天津大学 | Device and method for measuring difference of molded lines of valves in fully variable valve mechanism |
| CN104198192A (en) * | 2014-09-09 | 2014-12-10 | 韩志强 | Testing device of variable valve system and testing method thereof |
| CN204085894U (en) * | 2014-09-09 | 2015-01-07 | 韩志强 | A kind of proving installation of variable valve system |
| CN207832149U (en) * | 2017-10-30 | 2018-09-07 | 西华大学 | A kind of valve line measuring device |
-
2019
- 2019-09-18 CN CN201910880236.1A patent/CN110567698A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040069259A1 (en) * | 2002-10-14 | 2004-04-15 | Ford Global Technologies, Inc. | Variable lift cylinder valve system for internal combustion engine |
| CN102393302A (en) * | 2011-08-02 | 2012-03-28 | 天津大学 | Device and method for measuring difference of molded lines of valves in fully variable valve mechanism |
| CN104198192A (en) * | 2014-09-09 | 2014-12-10 | 韩志强 | Testing device of variable valve system and testing method thereof |
| CN204085894U (en) * | 2014-09-09 | 2015-01-07 | 韩志强 | A kind of proving installation of variable valve system |
| CN207832149U (en) * | 2017-10-30 | 2018-09-07 | 西华大学 | A kind of valve line measuring device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112763198A (en) * | 2020-12-28 | 2021-05-07 | 国营第六一六厂 | Camshaft bending fatigue test device |
| WO2023072162A1 (en) * | 2021-10-28 | 2023-05-04 | 中国第一汽车股份有限公司 | Cvvl valve lift measurement apparatus and measurement method |
| CN113983899A (en) * | 2021-11-22 | 2022-01-28 | 中国第一汽车股份有限公司 | Method for testing variable valve lift mechanism |
| CN113983899B (en) * | 2021-11-22 | 2024-03-19 | 中国第一汽车股份有限公司 | Method for testing variable valve lift mechanism |
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