CN110594015A - Air suction volume and compression ratio combined conversion system of engine - Google Patents
Air suction volume and compression ratio combined conversion system of engine Download PDFInfo
- Publication number
- CN110594015A CN110594015A CN201910806201.3A CN201910806201A CN110594015A CN 110594015 A CN110594015 A CN 110594015A CN 201910806201 A CN201910806201 A CN 201910806201A CN 110594015 A CN110594015 A CN 110594015A
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- China
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- torque
- eccentric wheel
- connecting rod
- compression ratio
- screw rod
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
- F02B75/048—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of a variable crank stroke length
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D15/00—Varying compression ratio
- F02D15/02—Varying compression ratio by alteration or displacement of piston stroke
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention relates to the field of fuel engines, a combined transformation system of air suction volume and compression ratio of the engine is composed of a set of eccentric wheel and a linkage mechanism which are added between a big end of a crankshaft and a connecting rod sleeve, the eccentric wheel is arranged between the crankshaft and the connecting rod sleeve, an eccentric wheel connecting rod is arranged on the eccentric wheel, a torque-changing screw rod is arranged on one side of the crankshaft, two ends of the torque-changing screw rod are arranged on a machine body through bearing seats, a torque-changing nut sleeve is arranged on the torque-changing screw rod and can move up and down when the torque-changing screw rod rotates, the outer side of the torque-changing nut sleeve is connected with the eccentric wheel connecting rod through an adjusting pull rod, when the torque-changing screw rod is sleeved with the torque-changing screw rod, the outer side position of the eccentric wheel is changed by the adjusting pull rod, when a piston reaches a, thereby realizing the combined transformation function of the air suction volume and the compression ratio.
Description
Technical Field
The invention relates to the field of fuel engines, in particular to a variable compression ratio system of an engine.
Background
The engine is popularized in vehicles, because the maximum output power of the engine at the later stage cannot be changed, a turbocharging system can be used when the power of the original engine is improved, the working principle of the turbocharging system is that the air inlet pressure of the engine is increased through a turbine, so that the volume of air entering a cylinder is increased to realize the enhancement of the power, but the volume of the cylinder of the engine is not changed, the compression ratio is changed when a piston reaches a top dead center after the volume of the air entering the cylinder is increased, and therefore the compression ratio is required to be adjusted by matching with a variable control system of the compression ratio.
The existing scheme is that an eccentric ring is added into the big end of a crankshaft connecting rod, the position of a piston is changed by controlling the rotation of the eccentric ring through a gear at the lower end of the eccentric ring, so that the compression ratio is changed, but the linkage control mechanism is complex, a plurality of sets of gear linkage systems are additionally arranged on a crankshaft, the requirement on the processing of the big end of the crankshaft is extremely high, the integral strength of the crankshaft is reduced by arranging a plurality of sets of gears in a limited space, and the crankshaft and the gear linkage mechanism are easily damaged due to insufficient mechanical strength when the crankshaft rotates at high speed.
The second existing scheme is that a set of multi-link mechanism and a control shaft are additionally arranged on an original crank-link mechanism, the position of a top dead center of a piston is changed by changing the positions of a plurality of linkage mechanisms, but the mechanism needs a plurality of sets of linkage structures to work together, the structure is large, the size and the weight of an engine are increased, unbalanced vibration can occur when a crankshaft conversion mechanism rotates at a high speed, and the fuel economy and the comfort of a vehicle are not facilitated.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a combined transformation system of air suction volume and compression ratio of an engine, which is formed by adding a set of eccentric wheel and a linkage mechanism between the big end of a crankshaft and a connecting rod sleeve, wherein the eccentric wheel is arranged between the crankshaft and the connecting rod sleeve, the eccentric wheel is provided with an eccentric wheel connecting rod, one side of the crankshaft is provided with a torque-changing screw rod, two ends of the torque-changing screw rod are arranged on a machine body by a bearing seat and can rotate left and right, the torque-changing screw rod is provided with a torque-changing nut sleeve, the torque-changing nut sleeve can move up and down when rotating, the outer side of the torque-changing nut sleeve is connected with the eccentric wheel connecting rod by an adjusting pull rod, the equipment is controlled by a controller to drive the torque-changing screw rod to rotate forward and backward, the torque, when the piston reaches the top dead center, the top dead center position of the piston can be lowered by adjusting the rising position of the torque-converting nut sleeve, so that the compression ratio of the cylinder is adjusted, the position of the torque-converting nut on the torque-converting screw rod is at the upper end, the top dead center position of the piston can be lowered, and the bottom dead center position after the piston is lowered can be lowered synchronously by the non-concentric property of the eccentric wheel, so that the combined transformation effect of the air suction volume and the compression ratio is realized.
Drawings
The invention is explained in further detail below with reference to the drawings.
Figure 1 is a schematic diagram of the overall structure of the system,
figure 2 is a schematic mechanical diagram of the system,
figure 3 is a schematic view of the torque converting nut up run of the system,
figure 4 is a schematic diagram of the piston down and torque nut down operation of the system,
figure 5 is a schematic diagram of the piston down and torque nut up operation of the system,
figure 6 is a schematic structural view of the eccentric wheel,
fig. 7 is a schematic circuit diagram of the system.
Detailed Description
As can be seen from figure 1, the system consists of an eccentric wheel and a control device which are additionally arranged between a crankshaft and a connecting rod sleeve, the eccentric wheel (3) is arranged between the crankshaft (1) and the connecting rod sleeve (2), the three synchronously rotate when the crankshaft rotates, the connecting rod sleeve (2) is connected with a piston (6) in an air cylinder (5) by a connecting rod (4) and is used for driving the piston to perform the working stroke of air suction, compression, power application and exhaust, the connecting rod sleeve and the connecting rod are of an integral structure, an eccentric wheel connecting rod (7) is arranged on the outer side of the eccentric wheel (3), one end of the eccentric wheel connecting rod is welded with the eccentric wheel into a whole, the other end of the eccentric wheel connecting rod is connected with a torque-changing nut sleeve (9) by an adjusting pull rod (8), two ends of the adjusting pull rod are provided with connectors and are used for connecting the torque-changing nut sleeve and the eccentric wheel, when the torque-changing screw rod (10) rotates left and right, the torque-changing nut sleeve (9) can be driven to move up and down, the upper end of the torque-changing screw rod (10) is fixed on the machine body through the bearing seat (11), the lower end of the torque-changing screw rod is fixed through the oil seal bearing seat (12) and the output shaft extends out of the engine, the driving motor (13) is installed at the bottom end of the outer side of the machine body, the output shaft of the driving motor is connected with the output shaft of the torque-changing screw rod through a coupling, the torque-changing screw rod (10) inside the engine is driven to rotate positively and negatively when the equipment rotates by the driving motor, so that the torque-changing nut sleeve (9) pushes or pulls the eccentric wheel (3) to rotate through the adjusting pull rod (8) and the eccentric wheel connecting rod (7), and because the positions of the crankshaft hole position of the eccentric wheel (3) and the central, the positions of the upper dead point and the lower dead point of the piston (6) can be changed through the pull rod (4), the upper end of the torque conversion screw rod (10) is provided with a synchronous chain wheel (14), the equipment can independently run when the equipment is applied to a single-cylinder engine, each set of piston and crankshaft is controlled by one set of independent device when the equipment is applied to a multi-cylinder engine, the synchronous chain wheels on the sets of devices are connected by a synchronous chain, the sets of devices can synchronously run by one driving motor, the controller (15) is a control center of the system and is arranged outside a machine body, a gas pressure detector (16), a driving motor (13) and a storage battery of a vehicle are connected by leads, the gas pressure detector (16) is arranged inside an air inlet (17) of the engine and is used for detecting the gas pressure of the air inlet when the engine runs and inputting the detected value into the controller (, the controller processes the signals and converts the signals into a positive and negative rotation driving power supply of the driving motor (13), a signal processing unit, a signal amplification unit and a driving unit are arranged in the controller (15), the signal processing unit is used for processing the gas pressure numerical value of the engine gas inlet channel detected by the gas pressure detector (16), the processed driving program signals are amplified by the signal amplification unit and then input into the driving unit, the driving unit amplifies the signals again and then converts the signals into the positive and negative rotation driving power supply of the driving motor, and the signals are input into the driving motor (13) through a lead; the gas pressure detector (16) detects the air inlet pressure of the air inlet channel in real time, the detected pressure value is analyzed and processed, and then corresponding motor driving signals are output to the signal amplification unit, when the detected gas pressure value is increased, the positive rotation power supply signal of the motor is output, the gas pressure value is larger, the number of rotating turns of the output control motor is larger, otherwise, the reverse rotation power supply signal of the motor is output when the detected value is reduced, the number of rotating turns of the motor returns to the initial position, the driving motor (13) is a stepping motor, and the positive and negative rotation turns of the motor can be accurately controlled through the driving unit.
As can be seen from figure 2, an eccentric wheel (3) is arranged on a crankshaft (1), a connecting rod sleeve (2) is arranged on the outer side of the eccentric wheel, the eccentric wheel and the connecting rod sleeve synchronously move when the crankshaft rotates, a connecting rod (4) is connected with a piston (6) on the outer side of the connecting rod sleeve, so that the piston is driven to vertically move in a cylinder, an eccentric wheel connecting rod (7) is arranged on the outer side of the eccentric wheel (3), the upper and lower positions of the connecting rod sleeve (2) on the outer side of the eccentric wheel can be changed by pulling or pushing the eccentric wheel connecting rod, the eccentric wheel (3) and the connecting rod sleeve (2) are of a split structure, the two parts are combined by using bolts so as to facilitate installation and later-stage replacement operation, the upper end of a torque-changing screw rod (10) is fixed on a machine body by using a bearing seat (11), the lower end of the torque-changing screw rod is installed at the bottom end of the, when the torque-changing nut is sleeved on the torque-changing screw rod to ascend or descend, the eccentric wheel connecting rod can be pulled or pushed by the adjusting pull rod to enable the eccentric wheel to rotate, a synchronous chain wheel (14) is arranged on the torque-changing screw rod, a driving motor (13) is installed at the bottom end of the outer side of the machine body, and an output shaft of the motor is connected with an output shaft of the torque-changing screw rod through a coupling.
As can be seen from FIG. 3, when the intake volume of the cylinder is increased after the turbocharging system is intervened during the operation of the engine, and the driving motor (13) drives the torque conversion screw (10) to rotate forwards, the torque-changing nut sleeve (9) moves towards the upper end, the eccentric wheel (3) can rotate under the linkage action of the adjusting pull rod (8) and the eccentric wheel connecting rod (7), the position of the outer connecting rod sleeve (2) can move towards the lower end after the position of the eccentric wheel is changed, when the piston (6) reaches the rising position of the piston after the top dead center of the cylinder, the piston can descend, and the torque-changing nut sleeve rises to the highest position, the compression ratio of the cylinder is 8: 1 when the engine runs, the cylinder does not generate the detonation phenomenon and high power output by reducing the compression ratio, and the top dead center stroke of the piston can be adjusted by adjusting the ascending and descending height of the torque conversion nut sleeve (9).
As can be seen from the graph of FIG. 4, when the position of the torque conversion nut sleeve (9) on the torque conversion screw rod (10) is at the lowest position, the piston (6) is lowered to the lowest position after the crankshaft (1) is lowered, and the piston is pushed to the highest stroke point after the crankshaft is raised, at the moment, the engine is in a normal-pressure working state with the compression ratio of 14: 1, and the engine can achieve high power output with fuel economy.
As can be seen from the figure 5, when the torque-converting nut sleeve (9) rises, the crankshaft (1) descends to pull the piston (6) to descend, and due to the pulling action of the torque-converting nut sleeve (9) rising, the adjusting pull rod (8) pulls the eccentric wheel connecting rod (7) and the eccentric wheel (3) to the highest position, at the moment, the position of the connecting rod sleeve (2) is lowered, the descending stroke of the piston (6) is also lowered, then more air can be sucked into the cylinder to perform combustion work, and therefore the position of the lower dead center of the piston is lowered after the position of the upper dead center of the piston is lowered, and the working purpose of jointly transforming the air suction volume and the compression ratio is achieved.
As can be seen from the figure 6, the eccentric wheel (3) is of a split structure, the two parts can be detached and installed on the crankshaft through the bolts (22), and the inner hole diameter and the outer diameter of the two parts are kept smooth and circular after the two parts are installed and combined through the bolts.
As can be seen from FIG. 7, the controller (15) is a circuit control center of the system, and is internally provided with a signal processing unit (18), a signal amplifying unit (19) and a driving unit (20), wherein the signal processing unit is used for processing the value detected by the gas pressure detector (16) and then converting the processed value into a driving signal of the driving motor, the signal amplifying unit is used for amplifying the signal input by the signal processing unit and then inputting the amplified signal into the driving unit, the driving unit is used for continuously amplifying the signal and then converting the amplified signal into a positive and negative rotation working power supply of the driving motor, a wire inlet end (21) is connected with the signal processing unit and the driving unit by a wire and used for supplying power to the controller, the outer part of the wire inlet end is connected with a storage battery of the vehicle by a wire, the gas pressure detector (16) is connected with the signal processing unit (18, the driving motor (13) is connected with the driving unit (20) by a lead, and the positive and negative rotation and the rotation number of turns of the driving motor are controlled by a power supply signal output by the driving unit.
When the system works, a gas pressure detector (16) detects the air inlet pressure of an engine air inlet, when the pressure is at normal pressure (natural air suction), a controller does not work, when the air inlet pressure rises (turbocharging intervenes), the gas pressure detector inputs the detected pressure value into a signal processing unit in the controller, the signal processing unit processes the signal and outputs a driving signal, the signal is amplified by an amplifying unit and a driving unit and then input into a driving motor to enable the motor to rotate clockwise in the positive direction, the driving motor drives a torque-changing screw rod (10) to rotate in the positive direction, a torque nut sleeve (9) moves towards the upper end, the position of an eccentric wheel (3) on a crankshaft can be changed under the linkage action of an adjusting pull rod (8) and an eccentric wheel connecting rod (7), the horizontal position of the connecting rod sleeve outside the eccentric wheel is reduced, and the position of the upper dead center of a piston which is, the compression ratio in the cylinder is reduced, so that the detonation phenomenon when the compression ratio of the cylinder is increased due to the increase of the air inlet pressure of the cylinder is prevented, at the moment, the engine can output larger power, the volume of the cylinder is increased when the position of the lower dead point of the piston is synchronously reduced, the effective power output of the engine can be enhanced after the volume of the gas sucked into the cylinder is increased, when the rotating speed of the engine is reduced (the turbocharging system is stopped), the gas pressure in the air inlet channel is reduced or recovered to the normal pressure value, a signal processing unit in the controller outputs a reverse rotation signal of the driving motor, an amplifying unit and a driving unit amplify the signal and then output a reverse anticlockwise rotating power supply to the driving motor, a nut torque-changing sleeve (9) descends after a torque-changing screw rod (10) rotates in the reverse direction, and an eccentric wheel (3) is reset to the initial, at the moment, the top dead center position and the bottom dead center position of the piston are raised, the compression ratio of the cylinder is increased, the engine can reach a working state with high compression ratio and low oil consumption, and the synchronous regulation of the compression ratio and the air suction volume can be realized by regulating the position of the eccentric wheel.
The system automatically controls the system through a gas pressure detector and a controller when working, so that the engine keeps a running mode with high compression ratio when in a natural air suction state to pursue economical power output, the position of a piston is reduced by adjusting an eccentric wheel after the intervention of a turbocharging system, the compression ratio is still enabled to reach an optimal state when more gas is sucked, so that the engine outputs higher power and avoids the occurrence of detonation, the piston is adjusted by the system through changing the eccentric wheel, the mechanical structure of the system is simpler than that of the traditional mechanism, the moving part can keep high-strength mechanical performance, the device only adds the eccentric wheel and a corresponding linkage mechanism in the original moving part, the volume of the traditional engine can meet the additional configuration of the system, and the appearance volume of the engine applying the system is smaller than that of the traditional mechanism for changing the compression ratio, the installation and application in the limited space on the vehicle are more facilitated.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A combined transformation system of air suction volume and compression ratio of an engine is formed by adding an eccentric wheel and a linkage device between a crankshaft and a connecting rod sleeve, and is characterized in that the eccentric wheel and the linkage device are arranged on the crankshaft; an eccentric wheel (3) is arranged between a crankshaft (1) and a connecting rod sleeve (2), the connecting rod sleeve (2) is connected with a piston (6) inside a cylinder (5) through a connecting rod (4), an eccentric wheel connecting rod (7) is arranged on the outer side of the eccentric wheel (3), one end of the eccentric wheel connecting rod is connected with the eccentric wheel into a whole, the other end of the eccentric wheel connecting rod is connected with a torque-changing nut sleeve (9) through an adjusting pull rod (8), connectors are arranged at two ends of the adjusting pull rod, the torque-changing nut sleeve (9) is installed on a torque-changing screw rod (10), threads on the torque-changing screw rod are matched with threads of the torque-changing nut sleeve, the upper end of the torque-changing screw rod (10) is fixed on a machine body through a bearing seat (11), the lower end of the torque-changing screw rod is fixed through an oil, an output shaft of the driving motor is connected with an output shaft of the torque conversion screw rod through a coupling, a torque conversion nut sleeve (9) slides up and down on the torque conversion screw rod when the driving motor (13) drives the torque conversion screw rod (10) to rotate in a forward and reverse mode, a controller (15) is installed on the outer portion of the machine body, a gas pressure detector (16) is installed inside an air inlet channel (17) of the engine, and the controller is connected with the gas pressure detector (16), the driving motor (13) and a storage battery of the vehicle through a lead.
2. The system of claim 1, wherein the engine comprises a combination of an intake volume and a compression ratio; the controller (15) is internally provided with a signal processing unit, a signal amplification unit and a driving unit, wherein the signal processing unit is used for processing a gas pressure numerical value of an engine air inlet channel detected by a gas pressure detector (16) and outputting a driving signal program to the amplification unit, the driving signal program is amplified by the signal amplification unit and then input into the driving unit, the driving unit amplifies the signal again and then converts the signal into a forward and reverse rotation driving power supply of the driving motor, the driving unit inputs the signal into the driving motor (13) through a lead, the driving unit controls the rotation number and the direction of the driving motor, and the driving motor (13) is a stepping motor.
3. The system of claim 1, wherein the engine comprises a combination of an intake volume and a compression ratio; the driving program of the signal processing unit is as follows; the gas pressure detector (16) detects the air inlet pressure of the air inlet channel in real time, analyzes and processes the detected pressure value and outputs a corresponding motor driving signal, when the detected gas pressure value is increased, a forward power supply signal of the motor is output, and when the detected gas pressure value is decreased, a reverse power supply signal of the motor is output.
4. The system of claim 1, wherein the engine comprises a combination of an intake volume and a compression ratio; when the device is applied to a single-cylinder engine, the device operates independently, when the device is applied to a multi-cylinder engine, each set of piston and crankshaft is controlled by one set of independent device, synchronous chain wheels on a plurality of sets of devices are connected by utilizing synchronous chains, and one driving motor is utilized to drive the plurality of sets of devices to operate synchronously.
5. The system of claim 1, wherein the engine comprises a combination of an intake volume and a compression ratio; when the position of the torque conversion nut sleeve (9) on the torque conversion screw rod (10) is at the lowest position, the compression ratio of the cylinder after the piston reaches the top dead center is 14: 1, and when the position of the torque conversion nut sleeve (9) on the torque conversion screw rod (10) is at the highest position, the compression ratio of the cylinder after the piston reaches the top dead center is 8: 1.
6. The system of claim 1, wherein the engine comprises a combination of an intake volume and a compression ratio; the eccentric wheel and the eccentric wheel connecting rod are of an integral structure.
7. The system of claim 1, wherein the engine comprises a combination of an intake volume and a compression ratio; the eccentric wheel (3) is arranged between the crankshaft (1) and the connecting rod sleeve (2).
8. The system of claim 1, wherein the engine comprises a combination of an intake volume and a compression ratio; the connecting rod sleeve (2) and the connecting rod (4) are of an integral structure.
9. The system of claim 1, wherein the engine comprises a combination of an intake volume and a compression ratio; the eccentric wheel (3) is of a split structure, and the inner aperture and the outer diameter of the two parts are kept smooth and circular after the two parts are combined by bolts.
10. The system of claim 1, wherein the engine comprises a combination of an intake volume and a compression ratio; the connecting rod sleeve (2) is of a split structure, and the inner bore diameter of the two parts is kept smooth and circular after the two parts are combined by bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910806201.3A CN110594015A (en) | 2019-08-22 | 2019-08-22 | Air suction volume and compression ratio combined conversion system of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910806201.3A CN110594015A (en) | 2019-08-22 | 2019-08-22 | Air suction volume and compression ratio combined conversion system of engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110594015A true CN110594015A (en) | 2019-12-20 |
Family
ID=68856131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910806201.3A Pending CN110594015A (en) | 2019-08-22 | 2019-08-22 | Air suction volume and compression ratio combined conversion system of engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110594015A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111622836A (en) * | 2020-06-05 | 2020-09-04 | 张家陶 | Engine crankshaft with adjustable radius |
-
2019
- 2019-08-22 CN CN201910806201.3A patent/CN110594015A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111622836A (en) * | 2020-06-05 | 2020-09-04 | 张家陶 | Engine crankshaft with adjustable radius |
| CN111622836B (en) * | 2020-06-05 | 2021-11-19 | 张家陶 | Engine crankshaft with adjustable radius |
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Legal Events
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20191220 |
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| WD01 | Invention patent application deemed withdrawn after publication |