CN114216686A - Automobile engine development test system - Google Patents
Automobile engine development test system Download PDFInfo
- Publication number
- CN114216686A CN114216686A CN202111548562.6A CN202111548562A CN114216686A CN 114216686 A CN114216686 A CN 114216686A CN 202111548562 A CN202111548562 A CN 202111548562A CN 114216686 A CN114216686 A CN 114216686A
- Authority
- CN
- China
- Prior art keywords
- engine
- air inlet
- intake
- control device
- cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000011981 development test Methods 0.000 title claims abstract description 17
- 238000002485 combustion reaction Methods 0.000 claims abstract description 62
- 238000012360 testing method Methods 0.000 claims abstract description 33
- 238000011161 development Methods 0.000 claims abstract description 26
- 230000006835 compression Effects 0.000 claims abstract description 20
- 238000007906 compression Methods 0.000 claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 230000007246 mechanism Effects 0.000 claims description 29
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 230000008859 change Effects 0.000 claims description 13
- 238000005192 partition Methods 0.000 claims description 13
- 239000011521 glass Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 229910001018 Cast iron Inorganic materials 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 238000012795 verification Methods 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 230000000052 comparative effect Effects 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 13
- 238000013461 design Methods 0.000 abstract description 7
- 239000007789 gas Substances 0.000 description 23
- 239000000243 solution Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002860 competitive effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- G01M15/02—Details or accessories of testing apparatus
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention provides an automobile engine development test system, which comprises a dynamometer, a vacuumizing device, a high-pressure oil supply device, a combustion analyzer, an air inlet pressure control device and a control device, wherein the dynamometer is connected with the vacuumizing device; the dynamometer is in transmission connection with the single-cylinder engine through a transmission shaft; the vacuumizing device is connected with the engine crankcase; the high-pressure oil supply device is communicated with an air inlet of the single-cylinder engine so as to provide required oil supply pressure; the combustion analyzer is communicated with a combustion chamber of the single-cylinder engine so as to acquire combustion data; the air inlet pressure control device is communicated with an air inlet of the single-cylinder engine so as to adjust the air inlet pressure of the single-cylinder engine; the control device is electrically connected with the dynamometer, the high-pressure oil supply device, the combustion analyzer and the air inlet pressure control device; by adopting the scheme, the engine design scheme with the most cost performance is obtained through the combined comparison test of the technologies of variable integrated compression ratio, variable intake tumble ratio, variable valve timing lift and the like, and the engine design scheme has the advantages of short development period and low development cost.
Description
Technical Field
The invention belongs to the technical field of automobile engine development and test systems, and particularly relates to an automobile engine development and test system.
Background
With the addition of WTO (world trade organization) in 2003, various aspects of the chinese economy have been rapidly developed, wherein the automotive industry is increasingly competitive with the addition of numerous autonomous national brands, and the monopoly of the market by foreign automotive companies is continuously broken. Along with the rapid development of economy, the economic income of people is greatly improved, automobiles as daily consumer goods of people also gradually enter common families, under the background, the automobile industry in China is developed vigorously, the output and sales volume is gradually higher than that in Japan, Germany and America, the output and sales volume is first worldwide for many years, but the integral holding volume of the automobiles in China is still low, so the integral holding volume of the automobiles is required to be continuously increased; along with the gradual rise of the automobile conservation quantity, the energy consumption and the environmental pollution gradually draw the attention of the nation, if the energy crisis and the environmental crisis are possibly generated due to improper handling, in order to deal with the increasing shortage of the energy problems and the gradual deterioration of the environmental problems, the automobile oil consumption regulation and the tail gas emission regulation are gradually tightened, the average oil consumption requirement of an enterprise in the sixth stage reaches 3.2 liters per hundred kilometers in 2030, and is reduced by 20 percent compared with the oil consumption index in the fifth stage, so that in order to achieve the aim, on one hand, a new integrated technology needs to be continuously developed and utilized, and the heat efficiency level of an engine is improved; on the other hand, a hybrid power technology is needed to be adopted, so that the engine mainly runs near a high-efficiency area; however, the existing engine has long development period and high cost, and faces many uncertain failure risks, and the development difficulty and complexity of the high-efficiency engine with a more rigorous target are improved by one order of magnitude.
Based on the technical problems existing in the development process of the automobile engine, no relevant solution is provided; there is therefore a pressing need to find effective solutions to the above problems.
Disclosure of Invention
The invention aims to provide an automobile engine development testing system aiming at the defects in the technology, and aims to solve one of the problems of long period and high cost in the existing automobile engine development process.
The invention provides an automobile engine development test system, which comprises a dynamometer, a vacuumizing device, a high-pressure oil supply device, a combustion analyzer, an air inlet pressure control device and a control device, wherein the dynamometer is connected with the high-pressure oil supply device; the dynamometer can be in transmission connection with the single-cylinder engine through the transmission shaft; the vacuum-pumping device can be connected with an engine crankcase of the single-cylinder engine so as to provide a negative pressure source; the high-pressure oil supply device can be communicated with an air inlet of the single-cylinder engine so as to provide required oil supply pressure for the single-cylinder engine; the combustion analyzer can be communicated with a combustion chamber of the single-cylinder engine so as to acquire combustion data of the combustion chamber; the air inlet pressure control device can be communicated with an air inlet of the single-cylinder engine so as to adjust the air inlet pressure of the single-cylinder engine; the control device is respectively and electrically connected with the dynamometer, the high-pressure oil supply device, the combustion analyzer and the intake pressure control device, so that the operation of the dynamometer, the high-pressure oil supply device, the combustion analyzer and the intake pressure control device can be controlled.
Further, the test system comprises a computer, and the control device comprises a rack control device and an engine control device; the stand control device is electrically connected with the dynamometer so as to control the operation of the dynamometer; the engine control device is electrically connected with the single-cylinder engine so as to control the oil injection and ignition parameters of the single-cylinder engine; the computer is respectively and electrically connected with the engine control device, the combustion analyzer and the air inlet pressure control device so as to control the operation of the engine control device, the combustion analyzer and the air inlet pressure control device; the computer is also electrically connected to the combustion analyzer to obtain combustion data.
Furthermore, the test system comprises a tumble regulating mechanism, the tumble regulating mechanism is connected to a pipeline between the air inlet pressure control device and an air inlet of the single-cylinder engine, and the tumble regulating mechanism is used for regulating the air inlet tumble ratio.
Furthermore, the test system comprises an exhaust gas recirculation subsystem and a post-treatment subsystem, the post-treatment subsystem is communicated with an exhaust port of the single-cylinder engine through a pipeline, one end of the exhaust gas recirculation subsystem is connected to the pipeline between the air inlet pressure control device and the tumble flow adjusting mechanism through a pipeline, and the other end of the exhaust gas recirculation subsystem is connected to the post-treatment subsystem through a pipeline; the test system introduces and adjusts the proportion of waste gas recirculation through the waste gas recirculation subsystem, and the gas after burning is discharged to the atmosphere after being purified by the post-treatment subsystem.
Further, the single cylinder engine includes a cylinder tube; the cylinder barrel is a glass cylinder barrel, and the single test running time of the glass cylinder barrel does not exceed minutes; alternatively, the cylinder is a cast iron cylinder, and the single test run time of the cast iron cylinder is from minutes to minutes.
Further, the single cylinder engine comprises a piston, the piston is positioned right below the combustion chamber, and the piston can be used for guiding and maintaining air flow in the single cylinder engine and can adjust the compression ratio; the single-cylinder engine adjusts the volume of the piston head, and then adjusts the compression ratio of the single-cylinder engine.
Furthermore, the single-cylinder engine comprises a cylinder cover assembly, the combustion chamber is arranged in the cylinder cover assembly, an air inlet channel and an air outlet channel are further arranged in the cylinder cover assembly, a cam air distribution mechanism is arranged between the air inlet channel and the air outlet channel in the cylinder cover assembly, an oil sprayer is arranged below the air inlet channel, a partition plate is arranged in the air inlet channel and divides the air inlet channel into an upper part and a lower part, and the partition plate is matched with the rolling flow adjusting mechanism for use.
Furthermore, a dial, a pointer and an adjusting part are arranged on the tumble adjusting mechanism, and the adjusting part is adjusted to different positions corresponding to the dial by rotating the pointer, so that the proportion of the upper air flow and the lower air flow entering the partition plate in the air inlet passage is adjusted, and the intake tumble ratio is changed.
Further, the cam valve actuating mechanism comprises an air inlet camshaft, an air outlet camshaft, an air inlet valve and an air outlet valve; the air inlet cam shaft extrudes the air inlet valve through an eccentric wheel of the air inlet cam shaft in the rotating process so as to control the opening and closing of the air inlet valve; the exhaust camshaft extrudes the exhaust valve through an eccentric wheel of the exhaust camshaft in the rotating process so as to control the opening and closing of the exhaust valve; the air inlet valve is rotatably connected with an air inlet rocker arm, and the air inlet rocker arm is connected with an air inlet hydraulic tappet; the air inlet hydraulic tappet drives the air inlet valve to move up and down through the air inlet rocker arm, so that a gap between the air inlet valve and the air inlet cam shaft is adjusted; and/or the air inlet valve is rotatably connected with an exhaust rocker arm, and the exhaust rocker arm is connected with an exhaust hydraulic tappet; the exhaust hydraulic tappet drives the intake valve to move up and down through an exhaust rocker arm, so that a gap between the intake valve and an exhaust cam shaft is adjusted; and a spark plug is arranged between the intake valve and the exhaust valve.
Furthermore, the intake camshaft can realize the change of the opening wrap angle and the lift of the intake valve through the change of the camshaft molded lines, so that the comparison verification of the Otto cycle, the Miller cycle and the Atkinson cycle is realized on one engine; the exhaust camshaft can realize the change of the opening wrap angle and the lift of the exhaust valve through the change of the camshaft molded lines, thereby realizing the comparison verification of the Otto cycle, the Miller cycle and the Atkinson cycle on one engine.
The automobile engine development testing system provided by the invention integrates the technologies of variable compression ratio, variable intake tumble ratio, variable distribution phase lift, external exhaust gas recirculation and the like, can obtain a high-efficiency engine design scheme with the most cost performance through technical combination comparison testing, and has the advantages of short development period and low development cost.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The invention will be further explained with reference to the drawings, in which:
FIG. 1 is a schematic diagram of an automotive engine development testing system according to the present invention;
FIG. 2 is a schematic view of a glass cylinder according to the present invention;
FIG. 3 is a schematic view of a cast iron cylinder of the present invention;
FIG. 4 is a diagram of the shape of the piston head of the compression ratio 12 of the present invention;
FIG. 5 is a diagram of the shape of the piston head of the compression ratio 15 of the present invention;
FIG. 6 is a cross-sectional view of the structure of the combustion chamber of the single cylinder head of the present invention;
FIG. 7 is a top view of the structure of the combustion chamber of the single cylinder head of the present invention;
FIG. 8 is a schematic view of a cam valve actuating mechanism of the single cylinder head of the present invention;
FIG. 9 is a cam valve actuating mechanism diagram of the single cylinder head of the present invention.
In the figure: 1. a single cylinder engine; 2. a dynamometer; 3. a vacuum pumping device; 4. a stage control device; 5. a computer; 6. an engine control device; 7. a high-pressure oil supply device; 8. a combustion analyzer; 9. an intake pressure control device; 10. a tumble flow regulating mechanism; 11. an exhaust gas recirculation subsystem; 12. a post-processing subsystem; 1.1, a cylinder cover assembly; 1.2, an air inlet channel; 1.3, a partition board; 1.4, an air inlet valve; 1.5, a combustion chamber; 1.6, an exhaust valve; 1.7, an exhaust passage; 1.8, an oil sprayer; 1.9, spark plug; 1.10, an air inlet camshaft; 1.11, an exhaust camshaft; 1.12, an exhaust rocker arm; 1.13, exhausting the hydraulic tappet; 1.14, an air inlet rocker arm; 1.15, an air inlet hydraulic tappet; 10.1, dial; 10.2, a pointer.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. 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 will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1 to 9, the invention provides an automobile engine development test system, and particularly relates to a high-efficiency engine development test platform, which optimizes and combines various advanced technologies such as a variable compression ratio technology, a variable air intake timing technology, a variable valve lift technology, a variable tumble ratio technology, an exhaust gas recirculation technology and the like by establishing a single-cylinder engine development test system so as to realize forward pre-research development of a high-thermal-efficiency engine; specifically, the test system comprises a dynamometer 2, a vacuumizing device 3, a high-pressure oil supply device 7, a combustion analyzer 8, an air inlet pressure control device 9 and a control device; the dynamometer 2 can be in transmission connection with the single-cylinder engine 1 through a transmission shaft, so that the torque output of the engine is tested and controlled; the vacuum-pumping device 3 can be connected to the engine crankcase of the single-cylinder engine 1, thus providing a source of negative pressure; the high-pressure oil supply device 7 can be communicated with an air inlet of the single-cylinder engine 1 so as to provide required oil supply pressure for the single-cylinder engine 1; the combustion analyzer 8 can be communicated with the combustion chamber 1.5 of the single-cylinder engine 1 so as to collect combustion data of the combustion chamber 1.5; the intake pressure control device 9 can communicate with the intake port of the single cylinder engine 1 to adjust the intake pressure of the single cylinder engine 1; the control device is respectively and electrically connected with the dynamometer 2, the high-pressure oil supply device 7, the combustion analyzer 8 and the intake pressure control device 9, so that the operation of the dynamometer 2, the high-pressure oil supply device 7, the combustion analyzer 8 and the intake pressure control device 9 can be controlled; by adopting the scheme, various technical schemes such as compression ratio, combustion cycle (Miller cycle/Atkinson cycle/Otto cycle), tumble ratio, exhaust gas recirculation and the like can be optimized, matched, combined and researched, so that rapid and forward pre-research and development of a high-heat-efficiency engine can be realized; the automobile engine development testing system provided by the invention integrates the technologies of variable compression ratio, variable intake tumble ratio, variable distribution phase lift, external exhaust gas recirculation and the like, can obtain a high-efficiency engine design scheme with the most cost performance through technical combination comparison testing, and has the advantages of short development period and low development cost.
Preferably, in combination with the above solutions, as shown in fig. 1 to 9, the automobile engine development testing system provided by the present invention further includes a computer 5 for displaying, recording and outputting the testing data, adjusting the design solution and drawing and reading the data; further, the control means includes a stand control means 4 and an engine control means 6; the stand control device 4 is electrically connected with the dynamometer 2 so as to control the operation of the dynamometer 2; further, the engine control device 6 is electrically connected with the single-cylinder engine 1 so as to control the oil injection and ignition parameters of the single-cylinder engine 1; specifically, the engine control device 6 is electrically connected to the spark plug of the single cylinder engine 1 through a first wire, thereby achieving an ignition connection; the engine control device 6 is electrically connected with an oil nozzle of the single-cylinder engine 1 through a second lead, so that oil injection control is realized; the computer 5 is electrically connected to the engine control device 6, the combustion analyzer 8, and the intake pressure control device 9, respectively, to control the operations of the engine control device 6, the combustion analyzer 8, and the intake pressure control device 9; further, the computer 5 is also electrically connected with the combustion analyzer 8, thereby acquiring combustion data; further, the rack control device 4 is electrically connected with the combustion analyzer 8, so that synchronous interaction of data of water temperature, fuel injection quantity, exhaust pressure and intake pressure of the engine is realized, and data and control can be observed and controlled conveniently in real time; further, the engine control device 6 is also connected to a high-pressure oil supply device 7, thereby controlling the pump oil pressure; further, the engine control device 6 is also connected with the combustion analyzer 8, so that synchronous interaction of combustion data signals is realized, and observation and control are facilitated; further, the computer 5 is also connected with an intake pressure control device 9, so that the control and adjustment of the intake pressure are realized.
Preferably, in combination with the above solutions, as shown in fig. 1 to 9, the automobile engine development testing system provided by the present invention further includes a tumble flow adjusting mechanism 10, the tumble flow adjusting mechanism 10 is connected to a pipeline between the intake pressure control device 9 and the intake port of the single-cylinder engine 1, and the tumble flow adjusting mechanism 10 is used for adjusting the intake tumble ratio, so as to perform testing adjustment; specifically, the tumble ratio is a ratio of the in-cylinder airflow operation speed to the engine speed, the larger the tumble ratio, the faster the combustion and the higher the homogeneity of the mixture, but an excessively high tumble ratio may cause a decrease in the intake air amount, and therefore the tumble ratio needs to be defined as required, and not the larger the tumble ratio, the better.
Preferably, in combination with the above solutions, as shown in fig. 1 to 9, the automobile engine development testing system provided by the present invention further includes an exhaust gas recirculation subsystem 11 and an aftertreatment subsystem 12; the system comprises an aftertreatment subsystem 12, an exhaust gas recirculation subsystem 11, an air inlet pressure control device 9, a tumble flow adjusting mechanism 10, an exhaust gas recirculation subsystem 11, an exhaust gas recirculation subsystem 12, a pipeline and a pipeline, wherein the aftertreatment subsystem 12 is communicated with an exhaust port of the single-cylinder engine 1 through a pipeline, one end of the exhaust gas recirculation subsystem 11 is connected to the pipeline between the air inlet pressure control device 9 and the tumble flow adjusting mechanism 10 through a pipeline, the other end of the exhaust gas recirculation subsystem 11 is connected to the aftertreatment subsystem 12 through a pipeline, and specifically, the other end of the exhaust gas recirculation subsystem 11 is connected to an air inlet end of an exhaust pipeline of the aftertreatment subsystem 12 through a pipeline; the test system introduces and adjusts the proportion of exhaust gas recirculation through the exhaust gas recirculation subsystem 11, and the combusted gas is purified by the post-treatment subsystem 12 and then discharged to the atmosphere.
Preferably, in combination with the above solution, as shown in fig. 1 to 9, the single-cylinder engine 1 comprises a cylinder; the cylinder barrel is a glass cylinder barrel, the single test running time of the glass cylinder barrel is not more than 2 minutes, the air inlet, spraying and combustion processes in the engine can be shot through the cylinder barrel by a high-speed camera, but the glass cannot be exposed in a high-temperature environment for a long time, so that the engine cannot run for a long time when the glass cylinder barrel is adopted, and the single running time is not more than 2 minutes generally; or the cylinder barrel is a cast iron cylinder barrel, the single test running time of the cast iron cylinder barrel is 30-40 minutes, when the cylinder barrel is made of cast iron, the cylinder barrel is internally provided with a water jacket for cooling like a common multi-cylinder engine, the single running time can reach more than 30 minutes, and model selection of development schemes such as a camshaft, an oil injector, a compression ratio and an ignition system can be carried out.
Preferably, in combination with the above solution, as shown in fig. 1 to 9, the single-cylinder engine 1 comprises a piston located directly below the combustion chamber 1.5, which can be used to guide and maintain the air flow inside the single-cylinder engine 1 and to adjust the compression ratio; specifically, the design of the shape of the piston head mainly follows two principles, namely guiding and maintaining airflow and adjusting the compression ratio, aiming at different compression ratio requirements of the combustion chamber, and on the premise of not influencing normal airflow movement in the cylinder, the flexible change of the compression ratio can be realized by adjusting the volume of the piston head; specifically, the single-cylinder engine 1 adjusts the compression ratio of the single-cylinder engine 1 by adjusting the volume of the piston head; specifically, a cylinder cover and a piston are arranged on the single-cylinder engine, and the compression ratio can be changed by 12-15 by replacing the pistons with different head volumes; in the case of matching with the same cylinder head combustion chamber, the piston of FIG. 5 is adopted, and the head convex part occupies a part of the volume, so that compared with the piston of FIG. 4, the volume of the combustion chamber in the cylinder is reduced, and the compression ratio is increased.
Preferably, with the above scheme, as shown in fig. 1 to 9, the single-cylinder engine 1 includes a cylinder head assembly 1.1, a combustion chamber 1.5 is disposed in the cylinder head assembly 1.1, an intake passage 1.2 and an exhaust passage 1.7 are further disposed in the cylinder head assembly 1.1, two sets of cam valve actuating mechanisms are disposed in the cylinder head assembly 1.1 and between the intake passage 1.2 and the exhaust passage 1.7, the two sets of cam valve actuating mechanisms respectively adopt drive control on an intake valve and an exhaust valve, and can realize changes of an opening wrap angle and a lift of the valve by replacing a camshaft, so as to realize switching of an otto cycle, a miller cycle and an atkinson cycle; further, a fuel injector 1.8 is arranged below the inlet 1.2, a partition plate 1.3 is arranged in the inlet 1.2, the inlet 1.2 is divided into an upper part and a lower part by the partition plate 1.3, and the partition plate 1.3 can be matched with the tumble regulating mechanism 10 for use.
Preferably, in combination with the above schemes, as shown in fig. 1 to 9, the tumble regulating mechanism 10 is provided with a dial 10.1, a pointer 10.2 and a regulating part, and the regulating part is adjusted to different positions corresponding to the dial 10.1 by rotating the pointer 10.2, so as to regulate the ratio of the upper airflow and the lower airflow entering the partition plate 1.3 in the air inlet channel 1.2, further change the intake tumble ratio, and under the premise of not changing the design of the engine air inlet channel, realize the test verification of different tumble ratio schemes, and save the verification period and cost; specifically, the following are: by adjusting the pointer 10.2 in the tumble adjusting mechanism 10, the air flow throughput of the partition board 1.3 at the upper part and the lower part of the air inlet channel 1.2 can be adjusted, so that the proportion of the air flow is adjusted, and the intake tumble ratio is further changed; preferably, in the present embodiment, the adjusting member is a hexagon socket head cap screw.
Preferably, in combination with the above scheme, as shown in fig. 1 to 9, the cam valve gear comprises an intake camshaft 1.10, an exhaust camshaft 1.11, an intake valve 1.4 and an exhaust valve 1.6; wherein, the air inlet camshaft 1.10 extrudes the air inlet valve 1.4 through an eccentric wheel thereof in the rotating process, thereby controlling the opening and closing of the air inlet valve 1.4; specifically, the top end of the intake valve 1.4 abuts against an eccentric wheel of the intake camshaft 1.10, so that the eccentric wheel of the intake camshaft 1.10 can extrude the intake valve 1.4 to realize lifting motion in the rotating process; correspondingly, the exhaust camshaft 1.11 presses the exhaust valve 1.6 through its eccentric during rotation, thereby controlling the opening and closing of the exhaust valve 1.6; specifically, the top end of the exhaust valve 1.6 abuts against an eccentric wheel of the exhaust camshaft 1.11, so that the eccentric wheel of the exhaust camshaft 1.11 can extrude the exhaust valve 1.6 to realize lifting movement in the rotating process; further, an air inlet rocker arm 1.14 is rotatably connected to the air inlet valve 1.4, and the air inlet rocker arm 1.14 is connected with an air inlet hydraulic tappet 1.15; specifically, the intake hydraulic tappet 1.15 drives the intake valve 1.4 to move up and down through the intake rocker arm 1.14, so that a gap between the intake valve 1.4 and the intake camshaft 1.10 is adjusted, and extrusion and lifting are facilitated; further, an exhaust rocker arm 1.12 is rotatably connected to the intake valve 1.6, and the exhaust rocker arm 1.12 is connected with an exhaust hydraulic tappet 1.13; the exhaust hydraulic tappet 1.13 drives the inlet valve 1.6 to move up and down through the exhaust rocker arm 1.12, so that the gap between the inlet valve 1.6 and the exhaust camshaft 1.11 is adjusted, and extrusion and lifting are facilitated; further, a spark plug 1.9 is arranged between the intake valve 1.4 and the exhaust valve 1.6; further, referring to fig. 6 and 8, the intake valve 1.4 and the exhaust valve 1.6 respectively include two, and the two intake valves 1.4 and the two exhaust valves 1.6 are symmetrically arranged in the cylinder head assembly 1.1, so as to realize intake and exhaust.
Preferably, in combination with the above solutions, as shown in fig. 1 to 9, the intake camshaft 1.10 can realize the change of the opening wrap angle and the lift of the intake valve 1.4 through the change of the camshaft profile, so as to realize the comparative verification of the otto cycle, the miller cycle and the atkinson cycle on one engine; accordingly, the exhaust camshaft 1.11 can realize the change of the opening wrap angle and the lift of the exhaust valve 1.6 through the change of the camshaft profile, so that the comparative verification of the Otto cycle, the Miller cycle and the Atkinson cycle can be realized on one engine.
Preferably, in combination with the above solutions, as shown in fig. 1 to 9, the automobile engine development test system provided by the present invention is equipped with an exhaust gas recirculation system, and can introduce the combusted exhaust gas into the combustion chamber again to participate in combustion, so as to improve the anti-knock property of the engine and improve the combustion efficiency of the engine.
The invention provides a development test system for an automobile engine, which can research a combustion discharge mechanism and repair internal work by adopting an optical test method on one hand; on the other hand, the optimization, matching, combination and research of various technical schemes such as compression ratio, combustion cycle (Miller cycle/Atkinson cycle/Otto cycle), tumble ratio, exhaust gas recirculation and the like can be carried out to realize forward pre-research and development of the engine with high thermal efficiency, and the method has the advantages of short development period and low development cost.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Those skilled in the art can make numerous possible variations and modifications to the described embodiments, or modify equivalent embodiments, without departing from the scope of the invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technology of the present invention are within the protection scope of the present invention, unless the content of the technical solution of the present invention is departed from.
Claims (10)
1. The automobile engine development testing system is characterized by comprising a dynamometer (2), a vacuumizing device (3), a high-pressure oil supply device (7), a combustion analyzer (8), an air inlet pressure control device (9) and a control device; the dynamometer (2) can be in transmission connection with the single-cylinder engine (1) through a transmission shaft; the vacuum-pumping device (3) can be connected with an engine crankcase of the single-cylinder engine (1) so as to provide a negative pressure source; the high-pressure oil supply device (7) can be communicated with an air inlet of the single-cylinder engine (1) so as to provide required oil supply pressure for the single-cylinder engine (1); the combustion analyzer (8) is capable of communicating with a combustion chamber (1.5) of the single cylinder engine (1) so as to acquire combustion data of the combustion chamber (1.5); the intake pressure control device (9) is capable of communicating with the air inlet of the single cylinder engine (1) so as to adjust the intake pressure of the single cylinder engine (1); the control device is electrically connected with the dynamometer (2), the high-pressure oil supply device (7), the combustion analyzer (8) and the intake pressure control device (9) respectively, so that the operation of the dynamometer (2), the high-pressure oil supply device (7), the combustion analyzer (8) and the intake pressure control device (9) can be controlled.
2. The automotive engine development test system of claim 1, characterized in that the test system comprises a computer (5), the control means comprising a bench control (4) and an engine control (6); the stand control device (4) is electrically connected with the dynamometer (2) so as to control the operation of the dynamometer (2); the engine control device (6) is electrically connected with the single-cylinder engine (1) so as to control the oil injection and ignition parameters of the single-cylinder engine (1); the computer (5) is electrically connected with the engine control device (6), the combustion analyzer (8) and the intake pressure control device (9) respectively so as to control the operation of the engine control device (6), the combustion analyzer (8) and the intake pressure control device (9); the computer (5) is also electrically connected to the combustion analyzer (8) to obtain combustion data.
3. The automotive engine development test system according to claim 1, characterized in that the test system comprises a tumble flow regulating mechanism (10), the tumble flow regulating mechanism (10) being connected to a pipeline between the intake pressure control device (9) and an intake port of the single cylinder engine (1), the tumble flow regulating mechanism (10) being used to adjust an intake tumble ratio.
4. The automotive engine development test system according to claim 4, characterized in that the test system comprises an exhaust gas recirculation subsystem (11) and an aftertreatment subsystem (12), the aftertreatment subsystem (12) is communicated with the exhaust port of the single cylinder engine (1) through a pipeline, one end of the exhaust gas recirculation subsystem (11) is connected to the pipeline between the intake pressure control device (9) and the tumble flow regulating mechanism (10) through a pipeline, and the other end of the exhaust gas recirculation subsystem (11) is connected to the aftertreatment subsystem (12) through a pipeline; the test system introduces and adjusts the proportion of exhaust gas recirculation through the exhaust gas recirculation subsystem (11), and the combusted gas is purified by the post-treatment subsystem (12) and then discharged to the atmosphere.
5. The automotive engine development test system of claim 1, characterized in that the single cylinder engine (1) comprises a cylinder; the cylinder barrel is a glass cylinder barrel, and the single test running time of the glass cylinder barrel is not more than 2 minutes; or the cylinder barrel is a cast iron cylinder barrel, and the single test running time of the cast iron cylinder barrel is 30-40 minutes.
6. The automotive engine development test system according to claim 1, characterized in that the single-cylinder engine (1) comprises a piston, located directly below the combustion chamber (1.5), which can be used to direct and maintain the air flow inside the single-cylinder engine (1) and to adjust the compression ratio; the single-cylinder engine (1) adjusts the compression ratio of the single-cylinder engine (1) by adjusting the volume of the piston head.
7. The automobile engine development test system according to claim 3, characterized in that the single cylinder engine (1) comprises a cylinder cover assembly (1.1), the combustion chamber (1.5) is arranged in the cylinder cover assembly (1.1), an air inlet channel (1.2) and an air outlet channel (1.7) are further arranged in the cylinder cover assembly (1.1), a cam valve mechanism is arranged between the air inlet channel (1.2) and the air outlet channel (1.7) in the cylinder cover assembly (1.1), a fuel injector (1.8) is arranged below the air inlet channel (1.2), a partition plate (1.3) is arranged in the air inlet channel (1.2), the partition plate (1.3) separates the air inlet channel (1.2) into an upper part and a lower part, and the partition plate (1.3) is matched with the tumble flow adjusting mechanism (10) for use.
8. The automobile engine development test system according to claim 7, characterized in that a dial (10.1), a pointer (10.2) and an adjusting component are arranged on the tumble regulating mechanism (10), and the adjusting component is adjusted to different positions corresponding to the dial (10.1) by rotating the pointer (10.2), so that the ratio of the air flow entering the air inlet channel (1.2) up and down the partition plate (1.3) is adjusted, and the intake tumble ratio is changed.
9. The automotive engine development testing system of claim 7, characterized in that the cam valve train comprises an intake camshaft (1.10), an exhaust camshaft (1.11), an intake valve (1.4), and an exhaust valve (1.6); the air inlet camshaft (1.10) presses the air inlet valve (1.4) through an eccentric wheel thereof in the rotating process, so that the opening and the closing of the air inlet valve (1.4) are controlled; the exhaust camshaft (1.11) presses the exhaust valve (1.6) through an eccentric wheel thereof during rotation, so as to control the opening and closing of the exhaust valve (1.6); the intake valve (1.4) is rotatably connected with an intake rocker arm (1.14), and the intake rocker arm (1.14) is connected with an intake hydraulic tappet (1.15); the air inlet hydraulic tappet (1.15) drives the air inlet valve (1.4) to move up and down through the air inlet rocker arm (1.14), so that a gap between the air inlet valve (1.4) and the air inlet cam shaft (1.10) is adjusted; and/or an exhaust rocker arm (1.12) is rotatably connected to the intake valve (1.6), and the exhaust rocker arm (1.12) is connected with an exhaust hydraulic tappet (1.13); the exhaust hydraulic tappet (1.13) drives the intake valve (1.6) to move up and down through the exhaust rocker arm (1.12), so that a gap between the intake valve (1.6) and the exhaust camshaft (1.11) is adjusted; and a spark plug (1.9) is arranged between the intake valve (1.4) and the exhaust valve (1.6).
10. The automobile engine development test system according to claim 9, characterized in that the intake camshaft (1.10) is capable of achieving changes in the opening wrap angle and lift of the intake valve (1.4) through changes in camshaft profiles, thereby achieving comparative verification of otto cycle, miller cycle, atkinson cycle on one engine; the exhaust camshaft (1.11) can realize the change of the opening wrap angle and the lift of the exhaust valve (1.6) through the change of the camshaft profile, thereby realizing the comparative verification of an Otto cycle, a Miller cycle and an Atkinson cycle on one engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111548562.6A CN114216686A (en) | 2021-12-17 | 2021-12-17 | Automobile engine development test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111548562.6A CN114216686A (en) | 2021-12-17 | 2021-12-17 | Automobile engine development test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114216686A true CN114216686A (en) | 2022-03-22 |
Family
ID=80703376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111548562.6A Pending CN114216686A (en) | 2021-12-17 | 2021-12-17 | Automobile engine development test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114216686A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020069852A1 (en) * | 2000-10-26 | 2002-06-13 | Ganoung David P. | Barrel stratified combustion |
| CN106168540A (en) * | 2016-08-09 | 2016-11-30 | 天津大学 | Can flexible flowing pressure ripple burning interact visualization combustor |
| CN106197841A (en) * | 2016-06-27 | 2016-12-07 | 奇瑞汽车股份有限公司 | A kind of electromotor in-cylinder combustion measures system and measuring method thereof |
| CN109854324A (en) * | 2019-02-14 | 2019-06-07 | 中国第一汽车股份有限公司 | A kind of Variable tumble gasoline engine combustion system |
| CN110207993A (en) * | 2019-04-30 | 2019-09-06 | 天津大学 | A kind of pilot system of double fuel single-cylinder engine machine frame |
| CN209783916U (en) * | 2019-03-29 | 2019-12-13 | 天津大学 | Single-cylinder diesel engine bench test system based on integral cylinder cover multi-cylinder diesel engine |
| CN112710472A (en) * | 2020-12-24 | 2021-04-27 | 奇瑞汽车股份有限公司 | Engine cold start test method and device |
| CN113266443A (en) * | 2021-06-24 | 2021-08-17 | 中国第一汽车股份有限公司 | Valve structure, engine thermodynamic cycle control system and method |
-
2021
- 2021-12-17 CN CN202111548562.6A patent/CN114216686A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020069852A1 (en) * | 2000-10-26 | 2002-06-13 | Ganoung David P. | Barrel stratified combustion |
| CN106197841A (en) * | 2016-06-27 | 2016-12-07 | 奇瑞汽车股份有限公司 | A kind of electromotor in-cylinder combustion measures system and measuring method thereof |
| CN106168540A (en) * | 2016-08-09 | 2016-11-30 | 天津大学 | Can flexible flowing pressure ripple burning interact visualization combustor |
| CN109854324A (en) * | 2019-02-14 | 2019-06-07 | 中国第一汽车股份有限公司 | A kind of Variable tumble gasoline engine combustion system |
| CN209783916U (en) * | 2019-03-29 | 2019-12-13 | 天津大学 | Single-cylinder diesel engine bench test system based on integral cylinder cover multi-cylinder diesel engine |
| CN110207993A (en) * | 2019-04-30 | 2019-09-06 | 天津大学 | A kind of pilot system of double fuel single-cylinder engine machine frame |
| CN112710472A (en) * | 2020-12-24 | 2021-04-27 | 奇瑞汽车股份有限公司 | Engine cold start test method and device |
| CN113266443A (en) * | 2021-06-24 | 2021-08-17 | 中国第一汽车股份有限公司 | Valve structure, engine thermodynamic cycle control system and method |
Non-Patent Citations (6)
| Title |
|---|
| 付中伟: ""阿特金森/米勒循环发动机的技术与应用"", 《小型内燃机与车辆技术》 * |
| 吴兴敏: "《汽车改装》", 30 December 2015, 北京理工大学出版社 * |
| 周建平: "《助理汽车检修师》", 30 December 2007, 北京理工大学出版社 * |
| 张庆林: "《铁路机车车辆科技手册》", 30 December 2000 * |
| 洪伟: ""基于PLIF光学测量的排气回流EGR分层效果"", 《内燃机学报》 * |
| 贾志超: ""滚流比对增压汽油机循环变动影响的试验研究"", 《小型内燃机与车辆技术》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11384700B2 (en) | Spark ignition engine control with exhaust manifold pressure sensor | |
| CN101779029B (en) | Multi-mode 2-stroke/4-stroke internal combustion engine | |
| CN102135040B (en) | Controlling method with supercharged engine and control gear | |
| CN102135038B (en) | The controlling method of motor and control gear | |
| US20070180824A1 (en) | Control of supercharged engine with variable geometry turbocharger and electric supercharger | |
| US20070079805A1 (en) | Air and fuel supply system for combustion engine operating at optimum engine speed | |
| CN102588131B (en) | Diesel engine for vehicle and controlling method thereof | |
| US6814060B1 (en) | Engine emission control system and method | |
| CN104937253A (en) | Internally cooled exhaust gas recirculation system for internal combustion engine and method thereof | |
| Willand et al. | Limits on downsizing in spark ignition engines due to pre-ignition | |
| CN103867322B (en) | A kind of control method of automobile and internal combustion engine | |
| JP2012012949A (en) | Diesel engine for vehicle | |
| Mitchell et al. | Performance evaluation of dedicated EGR on a 12 L natural gas engine | |
| JP2009299474A (en) | Intake air control device for internal combustion engine, and automatic adapting device for internal combustion engine | |
| US9284892B2 (en) | Six-stroke cycle engine having scavenging stroke | |
| CN114216686A (en) | Automobile engine development test system | |
| CN107762641B (en) | Continuous variable compression ratio engine device and compression ratio conversion method | |
| Tsuchiya et al. | Emission control of two-stroke motorcycle engines by the butterfly exhaust valve | |
| JP2013130121A (en) | Exhaust gas recirculation system for spark-ignition-type internal combustion engine | |
| US11378026B2 (en) | Self-learning torque over boost combustion control | |
| CN211116267U (en) | Two-four stroke engine | |
| CN207879473U (en) | A kind of internal-combustion engine variable compression ratio system and internal combustion engine | |
| WO2021159153A1 (en) | Internal combustion engine | |
| CN103603729A (en) | Variable-displacement engine | |
| Golloch et al. | Internal combustion engine downsizing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220322 |
|
| RJ01 | Rejection of invention patent application after publication |