CN108979984B - Cylinder stopping energy recovery mechanism based on VCM system of vehicle engine - Google Patents
Cylinder stopping energy recovery mechanism based on VCM system of vehicle engine Download PDFInfo
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- CN108979984B CN108979984B CN201810872923.4A CN201810872923A CN108979984B CN 108979984 B CN108979984 B CN 108979984B CN 201810872923 A CN201810872923 A CN 201810872923A CN 108979984 B CN108979984 B CN 108979984B
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- friction plate
- spline shaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G3/00—Other motors, e.g. gravity or inertia motors
- F03G3/08—Other motors, e.g. gravity or inertia motors using flywheels
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- Combustion & Propulsion (AREA)
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- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
A cylinder stopping energy recovery mechanism based on a VCM system of a vehicle engine belongs to the field of power engineering and comprises a gear transmission system, a hydraulic device, a spline shaft and a friction plate; the gear transmission system comprises a bull gear driven by the crankshaft of the cylinder body and two pinion gears meshed with the bull gear; a spline shaft matched with the central hole is arranged in the central hole of each pinion, one end of each spline shaft is connected with a friction plate, the other end of each spline shaft is connected with the end part of a hydraulic rod of a hydraulic device, and the spline shaft can rotate relative to the hydraulic rod; one of the friction plates is provided with a motor side friction plate which can be separated from and contacted with the friction plate for friction; the other friction plate is provided with a speed change side friction plate which can separate from and contact with the friction plate for friction. The invention can recover the energy of flywheel idling from cylinder deactivation to next oil supply, thereby improving the energy efficiency of the engine and saving the energy.
Description
Technical Field
The invention belongs to the field of power engineering, relates to the improvement of a vehicle engine, and particularly relates to a cylinder stopping energy recovery mechanism based on a VCM system of the vehicle engine.
Background
In recent years, with the rapid development of economy in China, the number of automobiles to be kept increases year by year, the fuel consumption and the emission of wastes are also increasing day by year, the world faces severe examinations such as energy shortage and environmental destruction, and on the premise of taking environmental protection as the background at present, how to efficiently utilize energy becomes the main direction of the research and development of engine technology.
VCM (Variable Cylinder Management Variable Cylinder technology) is one of new technologies that have been increasingly applied to modern cars in recent years. The energy wasted by the idling of the flywheel when the engine is in cylinder deactivation can be recovered if the internal structure is changed, and the energy is considerable, and the VCM system can be automatically switched among 3-cylinder, 4-cylinder and all 6-cylinder working modes: when the vehicle needs large power output, such as starting, accelerating or climbing, all 6 cylinders are put into operation; at medium cruise and low load, the system operates only one cylinder bank, i.e. 3 cylinders; at moderate acceleration, high cruise and gentle hill driving, the engine will run with 4 cylinders. Because the driver does not tread the accelerator pedal all the time, when the driver releases the accelerator pedal, part of the cylinders enter a cylinder deactivation state, the energy stored in the high-speed rotating flywheel in the cylinder deactivation state does not do useful work, and the energy is wasted.
Disclosure of Invention
The invention provides a cylinder stopping energy recovery mechanism based on a VCM system of a vehicle engine, which is used for recovering energy of flywheel idling from cylinder deactivation to next oil supply process to overcome the defects of the prior art.
The technical scheme of the invention is as follows:
the cylinder stopping energy recovery mechanism based on the VCM system of the vehicle engine comprises a gear transmission system, a hydraulic device, a spline shaft and a friction plate;
the gear transmission system comprises a bull gear driven by the crankshaft of the cylinder body and two pinion gears meshed with the bull gear; the axes of the three gears are arranged in parallel, a spline shaft matched with the central hole is arranged in the central hole of each pinion, one end of each spline shaft is connected with a friction plate, the other end of each spline shaft is connected with the end part of a hydraulic rod of a hydraulic device, and the spline shaft can rotate relative to the hydraulic rod;
one of the friction plates is provided with a motor side friction plate which can be separated from and contacted with the friction plate for friction;
the other friction plate is provided with a speed change side friction plate which can separate from and contact with the friction plate for friction.
Furthermore, one end of each spline shaft is fixedly connected with a diaphragm spring, and the friction plate is fixedly connected to the diaphragm spring.
Furthermore, a connecting hole with a T-shaped section is machined at the other end of the spline shaft, and a connector rotationally matched with the connecting hole is machined at the end part of the hydraulic rod.
Compared with the prior art, the invention has the beneficial effects that
The engine is further improved based on a VCM (variable Cylinder management) system. And the improved design is incorporated into an ECU system to control the time for recovering energy, so that the engine works under the optimal working condition state. And a double-crankshaft design is adopted on the basis of the VCM system. When the system is in a 3-cylinder deactivation state, the device is added between an engine crankshaft and a variable speed output shaft to realize crankshaft control of a cylinder deactivation row. The crankshaft of the cylinder deactivation row is connected with the motor through belt transmission to control the output state of the cylinder deactivation row, the ECU is used for controlling, when the intermediate speed cruise and the engine are in low load, the crankshaft leaves the output shaft and is connected into the generator, and after oil supply is recovered until the torque which can be output by the cylinders of the two crankshafts is the same as the rotating speed, the crankshaft of the row which is connected into the generator is connected into the output shaft again. Therefore, the energy of the idle flywheel of the cylinder deactivation engine is recovered, and the aims of improving the performance of the whole engine, saving energy and reducing exhaust emission are fulfilled.
The energy recovery of the existing VCM technology is improved, so that the energy efficiency is improved, and the waste caused by energy loss at present is reduced. Compared with the existing VCM technology, the design has more obvious adjustable effect than before. The energy-saving control system can be controlled according to the running state, so that the energy is used more fully and more efficiently, the energy waste is reduced, and the purposes of energy conservation and emission reduction are achieved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view showing the connection relationship between the hydraulic rod, the spline shaft, the diaphragm spring and the friction plate;
FIG. 3 is a view taken along line A-A of FIG. 2;
FIG. 4 is a schematic view showing the connection relationship between the spline shaft, the diaphragm spring and the friction plate;
FIG. 5 is a schematic view of a modified gear structure;
FIG. 6 is a schematic view of the working principle of the hydraulic device driving the hydraulic rod;
fig. 7 is a schematic view of the following relationship of the present invention in the 3-cylinder operation mode.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Referring to fig. 1-6, a cylinder rest energy recovery mechanism based on a VCM system of a vehicle engine comprises a gear train, a hydraulic device 2, a spline shaft 3, and a friction plate 4;
the gear transmission system comprises a bull gear 1-1 driven by a cylinder crankshaft and two pinion gears 1-2 meshed with the bull gear; the axes of the three gears are arranged in parallel, a spline shaft 3 matched with the central hole 1-2-1 is arranged in the central hole 1-2-1 of each pinion 1-2, and the central hole of the pinion 1-2 is designed by spline teeth meshed with the spline shaft 3; one end of each spline shaft 3 is connected with a friction plate 4, the other end of each spline shaft is connected with the end part of a hydraulic rod 2-1 of the hydraulic device 2, and the spline shaft 3 can rotate relative to the hydraulic rod 2-1;
a motor side friction plate 5 which can be separated from and contacted with one friction plate 4 for friction is arranged at the position opposite to the other friction plate 4;
the other friction plate 4 is provided with a shift-side friction plate 6 which can be separated from and brought into contact with the friction plate 4, at a position opposite to the friction plate 4.
The embodiment focuses on researching the energy recovery of the VCM system, and the VCM system is high in attention degree and mature in technology in the market. The VCM engine is characterized in that when a vehicle needs large power output during starting, accelerating or climbing, all 6 cylinders are put into operation; at medium-speed cruising and low engine load, a cylinder on one side of the system enters a cylinder halting state, namely 3 cylinders; at moderate acceleration, high cruise and gentle hill driving, the engine will run with 4 cylinders. Through the working mode of the air cylinder, the oil consumption of the engine is 7% lower than that of the equivalent vehicle type of the prior generation, but the fact that the time that a driver does not step on an accelerator accounts for a certain proportion in the driving process is found, according to the VCM system, the time is usually in a 3-cylinder stopping state, the flywheel is long in idling time, and energy which can be recovered is large in number, namely the VCM energy recovery system has a remarkable effect in the aspect of energy conservation theoretically. In the former case, there is a large waste of fuel, so that in order to further expand the adjustment range, it is necessary to modify the design in other structures.
In the embodiment, according to the existing cylinder deactivation technology at the present stage, the energy of the flywheel idling from the cylinder deactivation to the next oil supply is recovered, the energy can output a large amount of torque, and if the energy can be recovered and utilized, the energy can be one direction of energy saving. The energy from cylinder deactivation to next oil supply is recovered by changing the internal structure of the engine and connecting the engine in series, and when the rotating speed of the three cylinders for cylinder deactivation is different from that of the three cylinders for operation, the energy which can be output by the three cylinders for cylinder deactivation is stored in the storage battery and is used by the energy generated when the automobile operates, so that the effects of energy conservation and emission reduction are better achieved, and the utilization rate of the energy is improved. Compared with the engine with the same market concept, the engine with the same structure has lower design and manufacturing cost on the basis of achieving the similar oil-saving effect. From the technical and economic perspective, different driving states of the vehicle need different power supports, the insufficient oil supply of the cylinder can cause the power shortage, and the excessive oil supply can cause the energy waste.
Referring to fig. 2-4, one end of each spline shaft 3 is fixedly connected with a diaphragm spring 7, and the friction plate 4 is fixedly connected with the diaphragm spring 7. The control of the crankshaft 14 in one row of cylinder deactivation is realized through the diaphragm spring in the application, when a V6 engine is in a normal or four-cylinder working state, the crankshaft 14 is connected with a speed change side friction plate of an output shaft through an output side friction plate of the application, the friction plate is connected with a motor side and is disconnected, when a VCM system enters a three-cylinder deactivation state, oil is supplied to a hydraulic cavity of a motor side hydraulic cylinder of the application by an ECU control hydraulic system, the friction plate on one side of the crankshaft 14 is connected with the motor side friction plate, the hydraulic transmission system can provide long-time sufficient and stable pressure at the moment, the diaphragm spring provides buffering for mutual contact of the friction plates, and the nonlinear characteristic of the diaphragm spring can rapidly provide sufficient torque after buffering. Meanwhile, the ECU controls the hydraulic transmission system to separate a speed change side friction plate of the output shaft, so that the cylinder entering a cylinder deactivation state stops power output, and idling energy is input into a vehicle-mounted storage battery to be stored.
The modified small gear 1-2 mainly functions to transmit the torque output by the crankshaft 14 connected with the large gear 1-1 to the spline shaft. The pinion 1-2 is designed to have a tooth socket hole engaged with the spline shaft as a center hole at the center, and can ensure stable transmission torque when the spline moves axially.
Referring to fig. 2 and 3, the other end of the spline shaft 3 is provided with a connecting hole 3-1 with a T-shaped section, and the end of the hydraulic rod 2-1 is provided with a connector 2-2 which is rotatably matched with the connecting hole 3-1. So set up, when guaranteeing that the integral key shaft can be realized axial displacement by the pneumatic cylinder drive of pneumatic cylinder, the integral key shaft and the pinion and the friction disc of last connection can rotate independently all the time. When hydraulic means promoted spline axial displacement, the friction disc just began can be with less pressure mutual contact, then increases pressure gradually through diaphragm spring, can increase axial transmission pressure fast when necessary through ECU to the accurate control of distance and diaphragm spring's nonlinear characteristics, in output torque in the short time, diaphragm spring can reduce the friction disc wearing and tearing simultaneously, makes the transmission process more steady.
Referring to fig. 1 and 5, the large gear 1-1 and the small gear 1-2 are both spur gears. So set up, simple structure is convenient, convenient to use. The driving medium of the hydraulic device 2 is oil. The mechanical design part of the present application utilizes hydraulic transmission. The oil is used as a medium in the application for the following two reasons; firstly, the viscosity of pure water is usually 1/40 to 1/50 of oil, and even lower, therefore, on one hand, the pure water is easy to cause the internal and external leakage of the hydraulic components and the system, and the volumetric efficiency of the system is reduced; on the other hand, the lubricating property of pure water is poor, so that it is difficult to form a hydraulic film in a coupling friction pair of a pure water hydraulic component, resulting in dry friction. Secondly, compared with hydraulic oil, the density of water is 10% higher, the compressibility is 25% lower, the sound velocity is 10% higher, so when the flowing state of water changes due to the sudden opening and closing of a valve in a pure water hydraulic transmission system, hydraulic impact, vibration and noise which are larger than those of hydraulic transmission are easily caused, and harmful effects are caused on the working performance, the service life and the personal health of the system. In the design, larger hydraulic impact can cause sudden change of power output, thereby causing two problems; firstly, the friction plate is worn relatively, and secondly, the driving is uncomfortable. Oil is therefore used in this design rather than water.
Referring to fig. 6 and 7, fig. 7 is a schematic diagram of the working mode of the 3-cylinder servo mechanism according to the present invention, the hydraulic device adopts a hydraulic transmission principle, 11 is an oil inlet pipe, 12 is an oil outlet pipe, 9 is an oil tank, 8 is a hydraulic oil pump assembly, 10 is a check valve, 13 is a valve, 2-3 is a hydraulic cavity, and 8 provides power for the hydraulic oil pump assembly, and the check valve 10 can ensure that sufficient and stable pressure is provided for the engagement of friction plates. When the cylinder is stopped, the ECU controls the motor side to charge oil into the hydraulic cavity 2-3 in the hydraulic cylinder, and simultaneously controls the hydraulic cavity 2-3 on the power output speed change side to recover hydraulic oil, so that the purpose of stopping the power output speed change side to enter an energy recovery state is achieved. When the engine recovers oil supply until the rotating speeds of the power shafts on the two sides are the same, the hydraulic cavity of the output shaft on the speed changing side is supplied with oil and the hydraulic oil on the motor side is recovered at the same time, so that the cylinder recovering the oil supply can output power again.
The present invention is not limited to the above embodiments, and any person skilled in the art can make many modifications and equivalent variations by using the above-described structures and technical contents without departing from the scope of the present invention.
Claims (5)
1. Jar energy recuperation mechanism that stops up based on vehicle engine VCM system which characterized in that: the gear transmission mechanism comprises a gear transmission system, a hydraulic device (2), a spline shaft (3) and a friction plate (4);
the gear transmission system comprises a large gear (1-1) driven by a cylinder crankshaft and two small gears (1-2) meshed with the large gear; the axes of the three gears are arranged in parallel, a spline shaft (3) matched with the central hole (1-2-1) is arranged in the central hole (1-2-1) of each pinion (1-2), and the central hole of each pinion (1-2) adopts spline teeth meshed with the spline shaft (3);
one end of each spline shaft (3) is connected with a friction plate (4), the other end of each spline shaft is connected with the end part of a hydraulic rod (2-1) of the hydraulic device (2), and the spline shafts (3) can rotate relative to the hydraulic rods (2-1);
a motor side friction plate (5) which can be separated from and in contact with the friction plate (4) for friction is arranged at the position opposite to one friction plate (4); a speed-changing side friction plate (6) which can be separated from and contacted with the friction plate (4) for friction is arranged at the opposite position of the other friction plate (4).
2. The intermittent energy recovery mechanism based on the VCM system of the vehicle engine as claimed in claim 1, wherein: one end of each spline shaft (3) is fixedly connected with a diaphragm spring (7), and the friction plate (4) is fixedly connected on the diaphragm spring (7).
3. The intermittent energy recovery mechanism based on the VCM system of the vehicle engine as claimed in claim 2, wherein: the other end of the spline shaft (3) is provided with a connecting hole (3-1) with a T-shaped section, and the end part of the hydraulic rod (2-1) is provided with a connector (2-2) which is in running fit with the connecting hole (3-1).
4. The intermittent energy recovery mechanism based on the VCM system of the vehicle engine as claimed in claim 3, wherein: the big gear (1-1) and the small gear (1-2) are straight gears.
5. The intermittent energy recovery mechanism based on the VCM system of the vehicle engine as claimed in claim 4, wherein: the driving medium of the hydraulic device (2) is oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810872923.4A CN108979984B (en) | 2018-08-02 | 2018-08-02 | Cylinder stopping energy recovery mechanism based on VCM system of vehicle engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810872923.4A CN108979984B (en) | 2018-08-02 | 2018-08-02 | Cylinder stopping energy recovery mechanism based on VCM system of vehicle engine |
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| CN108979984A CN108979984A (en) | 2018-12-11 |
| CN108979984B true CN108979984B (en) | 2020-04-24 |
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| CN201810872923.4A Expired - Fee Related CN108979984B (en) | 2018-08-02 | 2018-08-02 | Cylinder stopping energy recovery mechanism based on VCM system of vehicle engine |
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| CN113135479B (en) * | 2021-04-13 | 2022-09-13 | 日立楼宇技术（广州）有限公司 | Elevator braking component testing system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100439144C (en) * | 2006-05-31 | 2008-12-03 | 清华大学 | Auxiliary power unit having electric controlled clutch applied for series type mixed power |
| CN201062637Y (en) * | 2007-05-24 | 2008-05-21 | 东风电动车辆股份有限公司 | Automobile engine and motor/generator connecting device |
| GB201209767D0 (en) * | 2012-06-01 | 2012-07-18 | Ricardo Uk Ltd | Improvements in vehicles |
| JP2014237374A (en) * | 2013-06-07 | 2014-12-18 | マツダ株式会社 | Hybrid vehicle |
| CN204729168U (en) * | 2015-07-10 | 2015-10-28 | 刘永辰 | A kind of engine power generation transmission system |
| DE102016217743A1 (en) * | 2016-09-16 | 2018-03-22 | Robert Bosch Gmbh | Hybrid system for an internal combustion engine |
| CN108001208B (en) * | 2016-10-31 | 2019-11-08 | 比亚迪股份有限公司 | Power drive system and vehicle with it |
| CN106801723A (en) * | 2017-04-07 | 2017-06-06 | 王俭礼 | A kind of uni-drive gear box, oil electric mixed dynamic system and automobile |
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Granted publication date: 20200424 Termination date: 20210802 |