CN102243071A - Piston top dead center automatic detecting and positioning device of reciprocating machinery - Google Patents
Piston top dead center automatic detecting and positioning device of reciprocating machinery Download PDFInfo
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- CN102243071A CN102243071A CN 201110115097 CN201110115097A CN102243071A CN 102243071 A CN102243071 A CN 102243071A CN 201110115097 CN201110115097 CN 201110115097 CN 201110115097 A CN201110115097 A CN 201110115097A CN 102243071 A CN102243071 A CN 102243071A
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- dead center
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Abstract
The invention discloses a piston top dead center automatic detecting and positioning device of reciprocating machinery. The device is characterized in that a displacement sensor is arranged at the position of an oil nozzle in a cylinder sleeve above a piston; the gear of a step motor is engaged with a flywheel ring gear of an engine; the signal output of the displacement sensor is connected to the input end of a controller; and a drive power wire of the step motor is connected to the output end of the controller. The system has a simple structure, and has the advantages of accurate positioning and short response time as compared with a visual observation method, so that the piston top dead center position of the reciprocating machinery is accurately positioned in a visual and digitized way. Single cylinder engine tests prove that the device can effectively improve the position accuracy of the piston top dead center, and the debugging process cannot influence the assembling process. The device is also suitable for piston positioning of other reciprocating machinery.
Description
Technical field
The invention belongs to internal-combustion engine technology, be specifically related to a kind of system and device that the engine piston top dead center position is accurately located of being applied to.
Background technology
The manufacturing accuracy of reciprocating machine piston and installation accuracy are one of master operations of reflection engine production enterprise-quality height, and especially in the installation process of piston, the accurate control of piston top dead center is played crucial effects to the performance of reciprocating machine.Because it is the piston top dead center position precision directly has influence on the installation degree of accuracy of cam mechanism, valve actuating mechanism, very crucial to injection timing.Along with the application of new and high technologies such as Electronic Control, HCCI, VVT in engine design and production, the assembly precision of engine is improved day by day.The piston top dead center position precision is bigger to influences such as the ratio of compression of the clearance volume of firing chamber, engine and combustion processes, can have influence on fuel economy, serviceability, discharging and noise and vibration etc. simultaneously.At present, the inspection of piston top dead center just mainly relies on range estimation or debugging by rule of thumb to carry out, and the installation accuracy of piston can not get guaranteeing like this, because tiny error, will be very big to the influences such as ratio of compression of engine.At present to the piston top dead center of reciprocating machine automatically the positive operation of inspection or isolated plant have following points to require: the one, method of operating is simple, the 2nd, do not change the structure of target device, the 3rd, it is fast that reaction velocity is wanted, the 4th, high sensitivity be arranged.
Summary of the invention
At above-mentioned technological deficiency and detection requirement, the objective of the invention is, provide a kind of system and device that the piston top dead center of reciprocating machine class is detected automatically and locatees, so that guarantee the degree of accuracy of piston top dead center position.
Technical scheme of the present invention is, displacement transducer is equipped with in the position of atomizer in the cylinder sleeve above piston, the gear of stepper motor and the engagement of the flywheel ring gear of engine, the signal output of displacement transducer is connected to the controller input end, and the driving power supply line of stepper motor is connected to controller output end.The piston of reciprocating machine comprises internal combustion engine, reciprocating expansion engine, compressor etc.Principle of the present invention is that a displacement transducer is set near piston top dead center position, utilize the flywheel ring gear of step motor drive engine, by mechanical motions such as bent axle and connecting rods, make piston produce micro displacement, by to the displacement signal sampling, the position of piston top dead center is accurately located.
Characteristics of the present invention and beneficial effect be, system architecture is very simple, compare with visual method have accurate positioning, the response time is very short, makes the accurate location of the piston top dead center position of reciprocating machine class reach directly perceived and digitizing.By the single cylinder engine evidence, this device can effectively improve the accuracy of piston top dead center position, and this debug process can not influence installation progress.This device is also located applicable to the piston of other reciprocating machines.
Description of drawings
Accompanying drawing 1 is the perspective view of apparatus of the present invention.
Accompanying drawing 2 is displacement curves of examining the relative sensor of piston tip in the positive process automatically.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing and by specific embodiment.The automatic detection and location device of the piston top dead center of reciprocating machine class comprises: (as shown in Figure 1) such as piston, cylinder sleeve, displacement transducer, stepper motor, flywheel ring gear, computing machine, connecting rod and bent axles, its system architecture is that displacement transducer 3 is equipped with in the position of atomizer in the cylinder sleeve 2 above piston 1, the gear of stepper motor 4 and 5 engagements of the flywheel ring gear of engine, the signal output of displacement transducer is connected to controller 6 input ends, and the driving power supply line of stepper motor 4 is connected to controller 6 output terminals.
For verifying implementation result of the present invention, adopt the test of engine single cylinder engine, displacement transducer is installed in the position of atomizer, the stepper motor gear meshes with flywheel ring gear, carries out dependence test.By computing machine the signal that displacement transducer feeds back is carried out analyzing and processing, and the rotation of synchro control step motor drive flywheel ring gear, through bent axle 8, connecting rod 7, drive piston and move up and down, till piston tip reaches the top dead centre design attitude.In the Automatic Detection and Control process, move as shown in Figure 2 the position of piston tip.Its response time is very short, and piston reaches top dead centre within 3 minutes, and error almost can be ignored in allowed band.
This device is not changing under the engine peripheral hardware prerequisite, and debug process does not influence installation progress.Can realize accurate control by sensor, computing machine and stepper motor to the piston top dead center of reciprocating machine.
Claims (1)
1. the automatic detection and location device of the piston top dead center of reciprocating machine class, comprise piston, cylinder sleeve, displacement transducer, stepper motor, flywheel ring gear, computing machine, connecting rod and bent axle, displacement transducer (3) is equipped with in the position that it is characterized in that atomizer in the cylinder sleeve (2) of piston (1) top, flywheel ring gear (5) engagement of the gear of stepper motor (4) and engine, the signal output of displacement transducer is connected to controller (6) input end, and the driving power supply line of stepper motor (4) is connected to controller (6) output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110115097 CN102243071A (en) | 2011-05-05 | 2011-05-05 | Piston top dead center automatic detecting and positioning device of reciprocating machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110115097 CN102243071A (en) | 2011-05-05 | 2011-05-05 | Piston top dead center automatic detecting and positioning device of reciprocating machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102243071A true CN102243071A (en) | 2011-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110115097 Pending CN102243071A (en) | 2011-05-05 | 2011-05-05 | Piston top dead center automatic detecting and positioning device of reciprocating machinery |
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| CN (1) | CN102243071A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645335A (en) * | 2012-05-11 | 2012-08-22 | 天津工业大学 | Method for locating top dead center of six cylinder engine |
| CN103175493A (en) * | 2013-04-01 | 2013-06-26 | 无锡威孚精密机械制造有限责任公司 | Displacement detecting device for variable cylinder of plunger pump |
| CN105021101A (en) * | 2015-08-10 | 2015-11-04 | 广西玉柴机器股份有限公司 | Engine piston top dead center detection method |
| CN111811447A (en) * | 2020-06-11 | 2020-10-23 | 广汽本田汽车有限公司 | Engine piston top dead center measuring system and method |
| CN112610385A (en) * | 2020-12-31 | 2021-04-06 | 重庆隆鑫通航发动机制造有限公司 | Device and method for measuring ignition advance angle of engine |
| CN112697441A (en) * | 2020-12-30 | 2021-04-23 | 潍柴动力股份有限公司 | Method and system for detecting upper dead center deviation of piston |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08121230A (en) * | 1994-10-31 | 1996-05-14 | Kubota Corp | Detecting device of top dead center position of piston and injection timing setting device of fuel injection pump |
-
2011
- 2011-05-05 CN CN 201110115097 patent/CN102243071A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08121230A (en) * | 1994-10-31 | 1996-05-14 | Kubota Corp | Detecting device of top dead center position of piston and injection timing setting device of fuel injection pump |
Non-Patent Citations (1)
| Title |
|---|
| 《内燃机学报》 20040731 于明进等 用活塞位移确定上止点相位方法的探讨 第22卷, 第04期 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645335A (en) * | 2012-05-11 | 2012-08-22 | 天津工业大学 | Method for locating top dead center of six cylinder engine |
| CN102645335B (en) * | 2012-05-11 | 2014-08-20 | 天津工业大学 | Method for locating top dead center of six cylinder engine |
| CN103175493A (en) * | 2013-04-01 | 2013-06-26 | 无锡威孚精密机械制造有限责任公司 | Displacement detecting device for variable cylinder of plunger pump |
| CN105021101A (en) * | 2015-08-10 | 2015-11-04 | 广西玉柴机器股份有限公司 | Engine piston top dead center detection method |
| CN105021101B (en) * | 2015-08-10 | 2018-08-31 | 广西玉柴机器股份有限公司 | The detection method of the top dead centre of the piston of engine |
| CN111811447A (en) * | 2020-06-11 | 2020-10-23 | 广汽本田汽车有限公司 | Engine piston top dead center measuring system and method |
| CN112697441A (en) * | 2020-12-30 | 2021-04-23 | 潍柴动力股份有限公司 | Method and system for detecting upper dead center deviation of piston |
| CN112697441B (en) * | 2020-12-30 | 2022-06-28 | 潍柴动力股份有限公司 | Method and system for detecting upper dead center deviation of piston |
| CN112610385A (en) * | 2020-12-31 | 2021-04-06 | 重庆隆鑫通航发动机制造有限公司 | Device and method for measuring ignition advance angle of engine |
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Application publication date: 20111116 |