CN111272435A - Detection device for gas distribution phase of diesel engine - Google Patents
Detection device for gas distribution phase of diesel engine Download PDFInfo
- Publication number
- CN111272435A CN111272435A CN202010141795.3A CN202010141795A CN111272435A CN 111272435 A CN111272435 A CN 111272435A CN 202010141795 A CN202010141795 A CN 202010141795A CN 111272435 A CN111272435 A CN 111272435A
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- diesel engine
- corner
- sensor
- follow
- mounting block
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The invention discloses a detection device for the gas distribution phase of a diesel engine, which comprises a displacement sensor, a corner sensor and a signal processor. The displacement sensor is fixed on a cylinder cover of the diesel engine through a displacement support and comprises a probe which is abutted against the head of a valve rocker of the diesel engine; the corner sensor passes through the corner support setting in the signal disc department of diesel engine, and the corner support can rotate along with the signal disc, and the corner sensor includes follow-up portion and measuring part. The follow-up part is arranged on the corner bracket; one end of the measuring part is fixed on the body of the diesel engine, and the other end of the measuring part is in induction contact with the follow-up part; the signal processor is in data connection with the displacement sensor and the corner sensor through the connecting wires, and the signal processor can obtain the gas distribution phase of the diesel engine through the measurement data of the displacement sensor and the corner sensor. Therefore, the signal processor can accurately acquire the valve timing angle through the measurement data of the displacement sensor and the rotation angle sensor.
Description
Technical Field
The invention relates to the field of engine design, in particular to a detection device for the valve timing of a diesel engine.
Background
The general structure of modern engines basically comprises two mechanisms, namely a crank link mechanism and a valve actuating mechanism, wherein the valve actuating mechanism is used as a mechanism for controlling the intake valve and the exhaust valve of each cylinder to be opened and closed at fixed time and controls the intake performance and the exhaust performance of the engine, thereby playing a decisive role in the overall performance of the engine.
In the current diesel engine valve actuating mechanism development test or valve actuating mechanism troubleshooting, the cold distribution phase needs to be detected, the prior art is that two people are matched with each other, one person rotates the crankshaft, the other person judges the opening or closing of the valve by observing the action of the dial indicator which is propped against the rocker arm, when the person observing the dial indicator finds that the pointer of the dial indicator rotates, the person rotating the crankshaft stops rotating the crankshaft, and the angle degree of the crankshaft is visually read through the angle dial disc on the crankshaft and the fixed pointer, namely the distribution phase needing to be measured.
The detection device of the prior art for the valve timing has the following defects:
1. in the prior art, the final result of the gas distribution phase is that data is obtained by visually reading the angle degree of the crankshaft, and the reading errors are caused by different observation angles and different human readings, so that the accuracy reaches 0.1 degrees by directly using the angle sensor, and the error influence of human reading factors is avoided;
2. the prior art is inaccurate in judging the opening or closing of the valve, because the dial indicator is used for judging the opening or closing of the valve, the dial indicator is suddenly rotated, and two persons are separated for operation, when the dial indicator rotates, another person needs to be shout in time to stop rotating the crankshaft, if the rotation angle of the crankshaft is too large, the initial opening or closing angle of the valve is missed, the crankshaft needs to be rotated to find the initial opening or closing angle of the valve, and at the moment, due to the objective existence of a gear gap, the crankshaft is rotated back and forth, so that the error of finally reading the crankshaft angle is increased.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a detection device for the valve timing of a diesel engine, which can accurately acquire a valve timing angle by arranging a displacement sensor at a valve rocker and arranging a corner sensor at a signal panel and then performing correlation calculation on the measured data of the displacement sensor and the corner sensor by matching with a signal processor.
In order to achieve the purpose, the invention provides a detection device for the valve timing of a diesel engine, which comprises a displacement sensor, a rotation angle sensor and a signal processor. The displacement sensor is fixed on a cylinder cover of the diesel engine through a displacement support and comprises a probe which is abutted against the head of a valve rocker of the diesel engine; the corner sensor passes through the corner support setting in the signal disc department of diesel engine, and the corner support can rotate along with the signal disc, and the corner sensor includes follow-up portion and measuring part. The follow-up part is arranged on the corner bracket; one end of the measuring part is fixed on the body of the diesel engine, and the other end of the measuring part is in induction contact with the follow-up part; the signal processor is in data connection with the displacement sensor and the corner sensor through the connecting wires, and the signal processor can obtain the gas distribution phase of the diesel engine through the measurement data of the displacement sensor and the corner sensor.
In a preferred embodiment, when the signal panel rotates along with the crankshaft and drives the follow-up part to rotate through the corner bracket, the measuring part can measure the corner of the crankshaft; meanwhile, the crankshaft rotates to drive the rocker arm push rod to move up and down, so that the head of the valve rocker arm is pushed to ascend or descend, and the displacement sensor can measure the displacement of the valve; the signal processor obtains the corresponding relation between the rotation angle and the displacement to calculate the gas distribution phase of the diesel engine.
In a preferred embodiment, the displacement support comprises a first mounting block, a vertical bar, a second mounting block and a cross bar. The first mounting block is arranged on the cylinder cover and is provided with a vertical mounting hole; the vertical rod is arranged in the vertical mounting hole of the first mounting block and can vertically move and rotate in the vertical mounting hole of the first mounting block; the second mounting block is provided with a vertical mounting hole, the second mounting block is arranged on the vertical rod through the vertical mounting hole, the second mounting block can vertically move along the vertical rod and rotate by taking the vertical rod as a shaft, and the second mounting block is also provided with a transverse mounting hole; the cross rod is arranged in the transverse mounting hole of the second mounting block.
In a preferred embodiment, the displacement sensor is disposed on the crossbar and is capable of horizontal movement along the crossbar and rotation about the crossbar.
In a preferred embodiment, the corner bracket comprises two V-shaped clamping blocks, a clamping screw and a follower bracket. The two V-shaped clamping blocks are oppositely clamped on the circumference of the signal panel by two openings; the clamping screw is arranged between the two V-shaped clamping blocks and used for fixedly arranging the two V-shaped clamping blocks on the circumference of the signal panel through nuts; the servo support is arranged on one side of the end face of the signal panel in parallel with the end face of the signal panel, one end of the servo support is arranged on one V-shaped clamping block, and the other end of the servo support extends to cross the center of the signal panel.
In a preferred embodiment, the follow-up part is arranged on the follow-up bracket, and the center of the follow-up part corresponds to the center of the circle of the signal panel.
Compared with the prior art, the detection device for the gas distribution phase of the diesel engine can automatically generate a detection data report of a gas distribution mechanism only by installing a crank angle sensor and a valve lift sensor and shaking a crank by one person. The valve lift sensor is used for judging the opening or closing of the valve, so that the initial opening or closing moment of the valve can be judged, and the crank angle sensor is synchronized at the moment, so that the valve timing angle can be accurately read. Meanwhile, detection errors caused by visual observation angles and operation of each person can be avoided.
Drawings
Fig. 1 is a schematic structural diagram of a diesel engine valve timing detecting apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of the mounting of a displacement sensor according to an embodiment of the present invention;
fig. 3 is a schematic view of the installation of a rotation angle sensor according to an embodiment of the present invention.
Description of the main reference numerals:
the device comprises a signal disc 1, a machine body 2, a cylinder cover 3, a rocker push rod 4, a valve rocker 5, a valve and reset spring 6, a displacement sensor 7, a displacement support 8, a first mounting block 801, a vertical bar 802, a second mounting block 803, a cross bar 804, a corner support 9, a clamping block 901-V, a clamping screw 902, a follow-up support 903, a corner sensor 10, a follow-up part 101, a measuring part 102, a signal processor 11 and a connecting wire 12.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a diesel engine valve timing detection apparatus according to an embodiment of the present invention. The detection device for the valve timing of the diesel engine according to the preferred embodiment of the invention comprises a displacement sensor 7, a rotation angle sensor 10 and a signal processor 11. The displacement sensor 7 is fixed on the cylinder cover 3 of the diesel engine through a displacement support 8, and the displacement sensor 7 comprises a probe which is abutted against the head of a valve rocker arm 5 of the diesel engine. The rotation angle sensor 10 is arranged at a signal panel 1 of the diesel engine through a rotation angle support 9, the rotation angle support 9 can rotate along with the signal panel 1, and the rotation angle sensor 10 comprises a follow-up portion 101 and a measuring portion 102. The follower portion 101 is provided on the corner bracket 9. One end of the measuring part 102 is fixed to the body 2 of the diesel engine, and the other end is in inductive contact with the follower part 101. The signal processor 11 is in data connection with the displacement sensor 7 and the rotation angle sensor 10 through a connecting wire 12, and the signal processor 11 can obtain the gas distribution phase of the diesel engine through the measurement data of the displacement sensor 7 and the rotation angle sensor 10.
Fig. 2 is a schematic view showing the installation of a displacement sensor according to an embodiment of the present invention, as shown in fig. 2. In some embodiments, displacement bracket 8 includes a first mounting block 801, a vertical bar 802, a second mounting block 803, and a cross bar 804. The first mounting block 801 is provided on the cylinder head 3, and the first mounting block 801 has a vertical mounting hole. Vertical rod 802 is disposed within the vertical mounting hole of first mounting block 801, and vertical rod 802 can move and rotate vertically within the vertical mounting hole of first mounting block 801. Second mounting block 803 has a vertical mounting hole through which second mounting block 803 is disposed on vertical rod 802, and second mounting block 803 can vertically move along vertical rod 802 and rotate about vertical rod 802, and second mounting block 803 also has a horizontal mounting hole. The cross bar 804 is disposed in a transverse mounting hole of the second mounting block 803. The displacement sensor 7 is disposed on the cross bar 804, and can horizontally move along the cross bar 804 and rotate about the cross bar 804. The probe of the displacement sensor 7 is perpendicular to the direction of the valve 6, and the displacement support 8 can ensure that the probe accurately props against the head of the valve rocker 5 of the diesel engine.
Fig. 3 is a schematic view showing the installation of a rotation angle sensor according to an embodiment of the present invention, as shown in fig. 3. In some embodiments, the corner bracket 9 includes two V-shaped clamp blocks 901, a clamping screw 902, and a follower bracket 903. Two V-shaped clamping blocks 901 are oppositely clamped on the circumference of the signal panel 1 by two openings. The clamping screw 902 is arranged between the two V-shaped clamping blocks 901, and the clamping screw 902 is used for fixing the two V-shaped clamping blocks 901 on the circumference of the signal panel 1 through nuts. The follower holder 903 is provided on the end surface side of the signal in parallel with the end surface of the signal panel 1, and one end of the follower holder 903 is provided on one V-shaped clamp 901 and the other end extends beyond the center of the signal panel 1. The follow-up part 101 is arranged on the follow-up support 903, and the center of the follow-up part 101 corresponds to the circle center of the signal disc 1.
The working principle of the detection device for the gas distribution phase of the diesel engine is as follows:
when a tester rotates the crankshaft, the signal panel 1 rotates along with the crankshaft and drives the follow-up part 101 of the rotation angle sensor 10 to rotate through the rotation angle support 9, because the measuring part of the rotation angle measuring sensor 10 is fixed on the machine body 2 and cannot rotate along with the signal panel 1, the measuring end of the measuring part 102 is in induction contact with the follow-up part 101, and the rotation angle of the crankshaft can be measured. Meanwhile, the crankshaft rotates to drive the rocker push rod 4 to move up and down, so that the head of the valve rocker 5 is pushed to ascend or descend, the valve 6 can be pressed to be closed when the head of the valve rocker 5 descends, and otherwise, the ascending valve 6 of the head of the valve rocker 5 can be opened by the aid of the return spring 6. The probe of the displacement sensor 7 is abutted against the head of the valve rocker 5, the head of the valve rocker 5 ascends or descends, and the displacement sensor 7 can measure the displacement of the valve. The measured data information is transmitted to the signal processor 11 by the corner sensor 10 and the displacement sensor 7, and the gas distribution phase of the diesel engine can be calculated after the signal processor 11 obtains the corresponding relation between the corner and the displacement.
In summary, the detection device for the valve timing of the diesel engine has the following advantages: according to the scheme, only a crank angle sensor and a displacement sensor are required to be installed, and a detection data report of the gas distribution mechanism can be automatically generated by shaking the crank shaft by one person. The valve opening or closing is judged through the displacement sensor, so that the initial opening or closing time of the valve is judged, and the crank angle sensor is synchronized to accurately read the valve timing angle. Meanwhile, detection errors caused by visual observation angles and operation of each person can be avoided. This scheme convenient operation is simple, measured data is accurate.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (5)
1. The utility model provides a detection device of diesel engine valve timing, its characterized in that includes:
the displacement sensor is fixed on a cylinder cover of the diesel engine through a displacement support and comprises a probe which is abutted against the head of a valve rocker of the diesel engine;
the corner sensor, it sets up the signal disc department at the diesel engine through the corner support, the corner support can be along with the signal disc rotates, the corner sensor includes:
a follower portion provided on the corner bracket; and
one end of the measuring part is fixed on the body of the diesel engine, and the other end of the measuring part is in induction contact with the follow-up part; and
and the signal processor is in data connection with the displacement sensor and the corner sensor through connecting wires, and can obtain the gas distribution phase of the diesel engine through the measurement data of the displacement sensor and the corner sensor.
2. The diesel engine valve timing detecting apparatus according to claim 1, wherein the displacement bracket includes:
the first mounting block is arranged on the cylinder cover, and a vertical mounting hole is formed in the first mounting block 801;
the vertical rod is arranged in the vertical mounting hole of the first mounting block and can vertically move and rotate in the vertical mounting hole of the first mounting block;
the second mounting block is provided with a vertical mounting hole, the second mounting block is arranged on the vertical rod through the vertical mounting hole, the second mounting block can vertically move along the vertical rod and rotate by taking the vertical rod as a shaft, and the second mounting block is also provided with a transverse mounting hole; and
and the cross bar is arranged in the transverse mounting hole of the second mounting block.
3. The apparatus for detecting the valve timing of a diesel engine according to claim 2, wherein the displacement sensor is disposed on the cross bar and is capable of moving horizontally along the cross bar and rotating around the cross bar.
4. The diesel engine valve timing detecting apparatus according to claim 1, wherein the corner bracket includes:
two V-shaped clamping blocks, two openings of which are oppositely clamped on the circumference of the signal panel;
the clamping screw is arranged between the two V-shaped clamping blocks and used for fixedly arranging the two V-shaped clamping blocks on the circumference of the signal panel through nuts; and
and the follow-up support is arranged on one side of the end face of the signal panel in parallel with the end face of the signal panel, one end of the follow-up support is arranged on one V-shaped clamping block, and the other end of the follow-up support extends to cross the center of the signal panel.
5. The device for detecting the valve timing of the diesel engine according to claim 4, wherein the follow-up portion is disposed on the follow-up bracket, and a center of the follow-up portion corresponds to a center of the signal panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010141795.3A CN111272435A (en) | 2020-03-04 | 2020-03-04 | Detection device for gas distribution phase of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010141795.3A CN111272435A (en) | 2020-03-04 | 2020-03-04 | Detection device for gas distribution phase of diesel engine |
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| Publication Number | Publication Date |
|---|---|
| CN111272435A true CN111272435A (en) | 2020-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010141795.3A Pending CN111272435A (en) | 2020-03-04 | 2020-03-04 | Detection device for gas distribution phase of diesel engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852674A (en) * | 2020-06-22 | 2020-10-30 | 潍柴动力股份有限公司 | Monitoring control device and monitoring method of valve mechanism |
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| DE3842283A1 (en) * | 1988-12-15 | 1990-06-21 | Gerd Mager | Control system with adjustable valve timings for four-stroke engines |
| JPH08210158A (en) * | 1995-02-06 | 1996-08-20 | Toyota Motor Corp | Valve timing control device of internal combustion engine |
| CN202057494U (en) * | 2011-02-10 | 2011-11-30 | 重庆和平自动化工程有限公司 | Online distribution phase detecting equipment of engine |
| CN102538682A (en) * | 2011-12-15 | 2012-07-04 | 中国人民解放军装甲兵工程学院 | Automatic tester for valve lift and timing phase of engine |
| JP2014164123A (en) * | 2013-02-25 | 2014-09-08 | Kyocera Document Solutions Inc | Optical scanner and image forming apparatus |
| CN104634230A (en) * | 2015-02-12 | 2015-05-20 | 广西玉柴机器股份有限公司 | Aided detection device and detection method for valve timing of diesel engine |
| CN204831266U (en) * | 2015-08-03 | 2015-12-02 | 盛瑞传动股份有限公司 | Engine camshaft valve timing diagram sensor signal dish |
| CN107907336A (en) * | 2017-11-27 | 2018-04-13 | 宁波市鄞州德来特技术有限公司 | A kind of engine variable-valve timing simulation system and its analogy method |
| CN110207994A (en) * | 2019-06-25 | 2019-09-06 | 重庆长安汽车股份有限公司 | A kind of initial port timing automatic measurement system of engine |
| CN209990582U (en) * | 2019-01-30 | 2020-01-24 | 镇江市亚美特机电有限公司 | Diesel engine oil supply timing detection device |
-
2020
- 2020-03-04 CN CN202010141795.3A patent/CN111272435A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3842283A1 (en) * | 1988-12-15 | 1990-06-21 | Gerd Mager | Control system with adjustable valve timings for four-stroke engines |
| JPH08210158A (en) * | 1995-02-06 | 1996-08-20 | Toyota Motor Corp | Valve timing control device of internal combustion engine |
| CN202057494U (en) * | 2011-02-10 | 2011-11-30 | 重庆和平自动化工程有限公司 | Online distribution phase detecting equipment of engine |
| CN102538682A (en) * | 2011-12-15 | 2012-07-04 | 中国人民解放军装甲兵工程学院 | Automatic tester for valve lift and timing phase of engine |
| JP2014164123A (en) * | 2013-02-25 | 2014-09-08 | Kyocera Document Solutions Inc | Optical scanner and image forming apparatus |
| CN104634230A (en) * | 2015-02-12 | 2015-05-20 | 广西玉柴机器股份有限公司 | Aided detection device and detection method for valve timing of diesel engine |
| CN204831266U (en) * | 2015-08-03 | 2015-12-02 | 盛瑞传动股份有限公司 | Engine camshaft valve timing diagram sensor signal dish |
| CN107907336A (en) * | 2017-11-27 | 2018-04-13 | 宁波市鄞州德来特技术有限公司 | A kind of engine variable-valve timing simulation system and its analogy method |
| CN209990582U (en) * | 2019-01-30 | 2020-01-24 | 镇江市亚美特机电有限公司 | Diesel engine oil supply timing detection device |
| CN110207994A (en) * | 2019-06-25 | 2019-09-06 | 重庆长安汽车股份有限公司 | A kind of initial port timing automatic measurement system of engine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852674A (en) * | 2020-06-22 | 2020-10-30 | 潍柴动力股份有限公司 | Monitoring control device and monitoring method of valve mechanism |
| CN111852674B (en) * | 2020-06-22 | 2022-04-26 | 潍柴动力股份有限公司 | Monitoring control device and monitoring method of valve mechanism |
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Application publication date: 20200612 |
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