CN107355277B - Variable-displacement variable-lift valve mechanism of engine - Google Patents
Variable-displacement variable-lift valve mechanism of engine Download PDFInfo
- Publication number
- CN107355277B CN107355277B CN201710769963.1A CN201710769963A CN107355277B CN 107355277 B CN107355277 B CN 107355277B CN 201710769963 A CN201710769963 A CN 201710769963A CN 107355277 B CN107355277 B CN 107355277B
- Authority
- CN
- China
- Prior art keywords
- pin
- positioning
- hole
- valve
- section
- 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.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention belongs to the technical field of engines, and relates to a variable-displacement and variable-lift valve mechanism of an engine. The invention is composed of a rocker arm, a driving shaft, a positioning pin a, a valve driving pin, a positioning pin b and the like; an oil way is arranged in the driving shaft and can supply low-pressure and high-pressure hydraulic oil; different valve lift positioning holes are arranged on the valve driving pin to adjust the valve lift; when low-pressure hydraulic oil is filled in the oil path and the positioning pin a and the positioning pin b are positioned in the fixed lift positioning hole, the engine displacement and the valve lift are fixed; when the lift of the valve is adjusted, high-pressure oil is supplied in the oil path, when the valve driving pin head moves to a corresponding lift position, low-pressure oil is switched in the oil path, and the engine works in a corresponding lift; when the displacement is adjusted, high-pressure oil is supplied to the oil path. The invention can realize the variable displacement and variable valve lift of the engine, optimize the working process of the engine and has flexible control; effectively reduces the pumping loss and the mechanical loss of the gasoline engine, improves the inflation efficiency and achieves the purposes of energy conservation and emission reduction.
Description
Technical Field
The invention belongs to the technical field of engines, and particularly relates to a variable-displacement and variable-lift valve mechanism of an engine.
Background
Due to the severe situation of energy and environmental problems, the engine faces the road of pursuing more high efficiency, energy conservation and environmental protection; therefore, a plurality of energy-saving and emission-reducing technologies are produced at the same time. The air distribution mechanism in the engine is the basis for realizing the air exchange process of the engine and ensuring that the work cycle of the heat-work conversion of the internal combustion engine can be carried out repeatedly and continuously. For an internal combustion engine, the internal combustion engine is usually operated under a partial load working condition, and the coefficient of residual exhaust gas is high, so that how to improve the combustion working stability of the engine, reduce pumping loss during partial load, organize a quick combustion process, and improve the combustion efficiency is very important. Therefore, variable valve lift technology and variable displacement technology have been developed. When the engine is in partial load, a smaller valve lift is adopted, the air flow speed passing through the valve is increased, the turbulence intensity is increased, the flame propagation speed and the combustion speed are improved, and the rapid combustion process is organized; and when the engine is in high speed and high load, a larger valve lift is adopted to reduce the flow resistance to the maximum extent, improve the charging coefficient and improve the dynamic property of the engine at high speed. In addition, the variable displacement technology can stop part of cylinders when the engine is under a small load, so that pumping loss, heat transfer loss and mechanical loss are reduced, and the comprehensive performance of the engine can be obviously improved.
The variable displacement technology of the engine mainly adopts two modes of stagnation valves and non-stagnation valves and only cuts off oil, but the mode of only cutting off oil can cause the problems that the three-way catalytic converter cannot be normally used and the like; the variable valve lift technology is mainly realized in the forms of variable cam profile, variable cam follower, electro-hydraulic drive and the like; the existing problems are that the structure is too complicated, so that the manufacturing cost is greatly increased; a large number of complicated mechanical components are additionally arranged, so that the reliability is reduced; valve seating shock problems are severe, etc.
Disclosure of Invention
The invention aims to solve the problems of low small load efficiency, fixed valve lift motion rule and the like in the existing gasoline engine and provides the variable-displacement variable-lift valve mechanism of the engine, which has a simple and reliable structure, can flexibly control the valve lift and realize the cylinder deactivation technology.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to a variable-displacement variable-lift valve mechanism of an engine, which consists of a spring a1, a support rod a2, a rocker arm 3, a connecting pin a4, a driving shaft 5, an oil plug a6, a baffle seat a7, a guide pin a8, a spring b9, a guide pin b10, an oil plug b11, a positioning pin a12, a spring c13, a baffle seat b14, a valve driving pin 15, a positioning pin b16, a spring d17, a baffle seat c18, a connecting pin b19, a support rod b20, a spring e21, a cylinder cover 22, a valve spring 23 and a valve 24; the upper parts of the support rods a2 and b20 are respectively connected with the connecting pins a4 and b19 in a sliding manner, the lower parts of the support rods respectively extend into mounting holes formed in the cylinder cover 22, and the lower ends of the support rods are respectively provided with a spring a1 and a spring e21; the rocker arm 3 is arranged between the driving shaft 5 and the valve 24, the upper end surface of the rocker arm 3 is in sliding connection with the driving shaft 5, and the lower end surface of the rocker arm 3 is in sliding connection with the valve 24; the left end and the right end of the rocker arm 3 are respectively connected on the connecting pin a4 and the connecting pin b19 in a sliding way; the oil block a6 and the oil block b11 are respectively connected to the outer sides of an oil passage b502 and an oil passage c506 which are formed in the driving shaft 5 through threads; the stopper seat a7, the stopper seat b14 and the stopper seat c18 are respectively connected to the outer sides of the drive pin mounting stepped hole 504, the circular hole a508 and the circular hole d511 of the drive shaft 5 by screw threads; one end of each guide pin a8 and one end of each guide pin b10 are fixedly connected in a guide pin mounting hole 1502 formed in the valve driving pin 15, and the other end of each guide pin a8 and the other end of each guide pin b10 respectively extend into the guide groove a503 and the guide groove b505 and are connected with the guide grooves in a sliding mode; the spring b9 is arranged between the stop seat a7 and the valve driving pin 15; the spring c13 is arranged between the positioning pin a12 and the stop seat b 14; the spring d17 is arranged between the positioning pin b16 and the stop seat c 18; the positioning pin a12 and the positioning pin b16 are oppositely arranged on two sides of the valve driving pin 15; the valve drive pin 15 is disposed in a drive pin mounting stepped hole 504 formed in the drive shaft 5 and slidably connected to the hole wall, and its head portion is allowed to protrude from the drive shaft 5 to drive the rocker arm 3.
The rocker arm is characterized in that the upper surface of the rocker arm 3 is provided with a leading-out section 301, a base circle section a302, a molded line section 303, a base circle section b304 and a leading-in section 305.
The positioning pin a12 and the positioning pin b16 are both of a three-section structure, and the hydraulic action section a1202 is positioned between the positioning section a (1201) and the limiting section a 1203; the hydrodynamic action section b1602 is positioned between the positioning section b (1601) and the limiting section b 1603; the positioning section a (1201), the hydraulic action section a1202 and the limiting section a1203 are coaxial; the positioning section b (1601), the hydraulic action section b1602 and the limiting section b1603 are coaxial.
The driving shaft 5 is provided with an oil passage a501, an oil passage b502, a guide groove a503, a driving pin mounting stepped hole 504, a guide groove b505, an oil passage c506, an oil passage d507, a round hole a508, a round hole b509, a round hole c510 and a round hole d511; the oil passage a501, the oil passage b502 and the round hole d511 are communicated in sequence; the guide groove a503 and the guide groove b505 are opposed to each other on both sides of the drive pin mounting stepped hole 504; the oil passage c506, the oil passage d507 and the round hole a508 are communicated in sequence; the round holes a508 and b509, the round holes c510 and d511 are arranged on two sides of the driving pin mounting stepped hole 504 in an opposite mode, and the four axial lines of the round holes a508, b509, c510 and d511 are superposed and are perpendicular to the axial line of the driving pin mounting stepped hole 504; the circular hole a508 is communicated with a circular hole b509, the hydrodynamic action section a1202 is in sliding connection with the hole wall of the circular hole a508, and the positioning section a (1201) is in sliding connection with the circular hole b 509; the round hole c510 is communicated with the round hole d511, the hydraulic action section a1202 is in sliding connection with the hole wall of the round hole d511, and the positioning section b (1601) is in sliding connection with the round hole c 510.
The valve driving pin 15 is provided with a round hole e1501, a guide pin mounting hole 1502, a lift positioning hole a1503, a lift positioning hole b1504 and a lift positioning hole c1505; wherein, the round hole e1501 is arranged at the central position of the tail part of the valve driving pin 15, and the axial lead of the round hole e1501 is superposed with the axial lead of the valve driving pin 15; the axis of the guide pin mounting hole 1502 is perpendicular to the axis of the valve driving pin 15; the lift positioning hole a1503, the lift positioning hole b1504 and the lift positioning hole c1505 have the same aperture, are parallel to the axis, and are perpendicular to the axis of the valve driving pin 15.
When the oil passage a501 and the oil passage d507 are not supplied with high-pressure hydraulic oil, the spring force generated by the spring c13 and the spring d17 can respectively push the positioning section a (1201) of the positioning pin a12 and the positioning section b (1601) of the positioning pin b16 to extend into a lift positioning hole a1503, a lift positioning hole b1504 or a lift positioning hole c1505 arranged on the valve driving pin 15; when the oil passages a501 and d507 are supplied with high-pressure hydraulic oil, the hydraulic pressures acting on the hydraulically acting section a1202 and the hydraulically acting section b1602 can overcome the resistance of the spring c13 and the spring d17, so that the positioning section a (1201) of the positioning pin a12 and the positioning section b (1601) of the positioning pin b16 are completely retracted into the circular hole b509 and the circular hole c510, respectively; when the positioning section a (1201) of the positioning pin a12 and the positioning section b (1601) of the positioning pin b16 do not extend into the lift positioning hole formed in the valve driving pin 15, the spring force generated by the spring b9 can push the head of the valve driving pin 15 to fully extend when the head of the valve driving pin 15 is not in contact with the upper surface profile 303 of the rocker arm 3 on one hand, and can not overcome the pre-tightening force of the valve spring f24 to push the valve 24 to open when the head of the valve driving pin 15 is in contact with the upper surface profile 303 of the rocker arm 3 on the other hand.
The working process of the device of the invention is as follows:
when the valve is not stopped and the valve lift is fixed: hydraulic oil in the oil passage a501 and the oil passage d507 is in a low-pressure state, and a positioning section a (1201) of the positioning pin a12 and a positioning section b (1601) of the positioning pin b16 are always in a lift positioning hole a1503, a lift positioning hole b1504 or a lift positioning hole c1505 of the valve driving pin 15; the head of the valve driving pin 15 drives the upper surface profile 303 of the rocker arm 3 to drive the valve 24 to move.
When the valve is not stopped and the valve lift needs to be adjusted: the control oil passage a501 and the oil passage d507 are supplied with high-pressure hydraulic oil, the spring c13 and the spring d17 are compressed under the action of hydraulic power, the positioning section a (1201) of the positioning pin a12 and the positioning section b (1601) of the positioning pin b16 withdraw from the lift positioning hole of the corresponding valve driving pin 15, after the valve driving pin 15 moves to the upper surface profile section 303 of the rocker arm 3, the extension length of the head of the valve driving pin 15 is continuously changed under the action of the profile section 303, when the extension length of the head of the valve driving pin 15 reaches a specified lift, the control oil passage a501 and the oil passage d507 are supplied with low-pressure hydraulic oil, under the action of spring force of the spring c13 and the spring d17, the positioning section a (1201) of the positioning pin a12 and the positioning section b (1601) of the positioning pin b16 are respectively pushed to extend into the specified lift positioning hole of the valve driving pin 15, and the engine works correspondingly.
When the valve is stopped: according to the engine operating state, the control oil passage a501 and the oil passage d507 are supplied with high-pressure hydraulic oil, so that the head of the valve driving pin 15 cannot drive the valve 24 to open.
Compared with the prior art, the invention has the beneficial effects that:
1. the variable-displacement variable-lift valve mechanism of the engine can realize variable valve lift, variable engine displacement and flexible control;
2. the variable-displacement variable-lift valve mechanism of the engine, provided by the invention, can give consideration to the performance of the engine under different working conditions, optimize the working process of the engine and effectively improve the dynamic property and the economical efficiency of the engine;
3. the variable-displacement and variable-lift valve mechanism of the engine, provided by the invention, can reduce the pumping loss and mechanical loss of the engine and improve the inflation efficiency. The effects of energy conservation and emission reduction are achieved.
4. The variable-displacement variable-lift valve mechanism of the engine provided by the invention is simple in structure, convenient to manufacture and easy to popularize.
Drawings
FIG. 1 is a schematic structural diagram of a variable displacement and variable lift valve mechanism of an engine
FIG. 2 is a schematic view of the structure of the rocker arm 3 in FIG. 1
FIG. 3 is a schematic top view of the rocker arm 3
FIG. 4 is a schematic view of the structure of the driving shaft 5 in FIG. 1
FIG. 5 is a schematic structural view of the positioning pin a12 in FIG. 1
FIG. 6 is a schematic structural view of the positioning pin b16 in FIG. 1
FIG. 7 is a schematic view of the valve drive pin 15 of FIG. 1
Wherein the content of the first and second substances, 1, spring a2, support rod a3, rocker arm 4, connecting pin a5, drive shaft 6, oil plug a7, baffle seat a8, guide pin a 9, spring b10, guide pin b11, oil plug b 12, positioning pin a 13, spring c 14, baffle seat b15, valve drive pin 16, positioning pin b 17, spring d 18, baffle seat c 19, connecting pin b20, support rod b 21, spring e22, cylinder cover 23, valve spring 24, valve 301, lead-out section 302, base circle section a 303, base circle section 304, base circle section b305, lead-in section 1201, positioning section a1202, hydraulic action section a1203, limiting section a 1601, positioning section b1602, hydraulic action section b1603, limiting section b 501, oil duct a 502, oil duct b 503, guide groove a, guide drive pin stepped hole 505, guide groove b 506, oil duct c, oil duct d 508, circular hole a 509, circular hole 511 b, lifting pin c, lifting pin mounting hole 1502, lifting hole 1505, lifting hole 510, locating hole b 506, oil duct c, locating hole 508, locating hole 510, locating hole b, lifting hole 510, lifting hole 1505 c, and 1504 round hole
Detailed Description
The invention is described in detail below with reference to figures 1-6:
referring to the attached FIG. 1,3,6:
the invention consists of a spring a1, a support rod a2, a rocker arm 3, a connecting pin a4, a drive shaft 5, an oil plug a6, a retaining seat a7, a guide pin a8, a spring b9, a guide pin b10, an oil plug b11, a positioning pin a12, a spring c13, a retaining seat b14, a valve driving pin 15, a positioning pin b16, a spring d17, a retaining seat c18, a connecting pin b19, a support rod b20, a spring e21, a cylinder cover 22, a valve spring 23 and a valve 24.
Wherein, the spring a1 and the spring e21 are arranged at the lower parts of the support rod a2 and the support rod b20 to provide force action for the movement of the support rod a2 and the support rod b 20;
the upper parts of the support rod a2 and the support rod b20 are respectively connected with the connecting pin a4 and the connecting pin b19 in a sliding way, and the lower parts of the support rods respectively extend into mounting holes formed in the cylinder cover 22; the supporting rod a2 and the supporting rod b20 play a supporting role for the rocker arm 3;
the rocker arm 3 is arranged between the driving shaft 5 and the valve 24, the upper end surface of the rocker arm 3 is in sliding connection with the driving shaft 5, and the lower end surface of the rocker arm 3 is in sliding connection with the valve 24; the left end and the right end of the rocker arm 3 are respectively connected on the connecting pin a4 and the connecting pin b19 in a sliding way;
the connecting pin a4 and the connecting pin b19 are connected with the supporting rod a2, the supporting rod b20 and the rocker arm 3;
the oil plug a6 and the oil plug b11 are respectively connected with the outer sides of an oil passage b502 and an oil passage c506 which are formed on the driving shaft 5 through threads to seal the oil plug a6 and the oil plug b 506;
the blocking seat a7, the blocking seat b14 and the blocking seat c18 are respectively connected to the outer sides of the driving pin mounting stepped hole 504, the round hole a508 and the round hole d511 of the driving shaft 5 through threads, and respectively limit the spring b9, the spring c13 and the spring d 17;
one end of each of the guide pins a8 and b10 is fixedly connected to a guide pin mounting hole 1502 formed in the valve driving pin 15, and the other end of each of the guide pins a8 and b10 extends into the guide groove a503 and the guide groove b505 respectively and is in sliding connection with the guide grooves, so that a guide effect is provided for the movement of the valve driving pin 15;
the spring b9 is arranged between the stop seat a7 and the valve driving pin 15; the spring c13 is arranged between the positioning pin a12 and the stop seat b 14; the spring d17 is arranged between the positioning pin b16 and the stop seat c 18;
the spring b9, the spring c13 and the spring d17 have certain pretightening force when being installed;
the positioning pin a12 and the positioning pin b16 are oppositely arranged on two sides of the valve driving pin 15, and can adjust the valve lift;
the valve drive pin 15 is disposed in a drive pin mounting stepped hole 504 formed in the drive shaft 5 and slidably connected to the hole wall, and its head portion is allowed to protrude out of the drive shaft 5 to drive the rocker arm 3.
Referring to the attached FIG. 1,2:
the upper surface of the rocker arm 3 is provided with a leading-out section 301, a base circle section a302, a molded line section 303, a base circle section b304 and a leading-in section 305.
Wherein the introduction section 305 smoothly introduces the head of the valve driving pin 15 into the rocker arm 3;
the base circle section b304 connects the lead-in section 305 and the molded line section 303, and plays a transition role;
the profile line 303 controls the motion law of the valve 24;
the base circle segment a302 is connected with the leading-out segment 301 and the molded line segment 303 to play a transition role;
the leading-out section 301 leads the head of the valve driving pin 15 out of the rocker arm 3 smoothly.
Referring to the attached FIG. 3,4:
the positioning pin a12 is of a three-section structure and comprises a positioning section a (1201), a hydraulic action section a1202 and a limiting section a1203.
The hydrodynamic action section a1202 is positioned between the positioning section a (1201) and the limiting section a1203, and the positioning section a (1201), the hydrodynamic action section a1202 and the limiting section a1203 are coaxial.
The locating pin b16 is of a three-section structure and comprises a locating section b (1601), a hydraulic action section b1602 and a limiting section b1603.
The hydraulic action section b1602 is located between the positioning section b (1601) and the limiting section b 1603; the positioning section b (1601), the hydraulic action section b1602 and the limiting section b1603 are coaxial.
The positions of the positioning section a (1201) and the positioning section b (1601) can control the lift of the valve 24;
the hydraulic action section a1202 and the hydraulic action section b1602 can bear the pressure action of hydraulic oil in the oil passage c506 and the oil passage b502 respectively;
the limiting section a1203 and the limiting section b1603 limit the spring c13 and the spring d17 respectively.
Referring to the attached drawings, 1,5:
the driving shaft 5 is provided with an oil passage a501, an oil passage b502, a guide groove a503, a driving pin mounting stepped hole 504, a guide groove b505, an oil passage c506, an oil passage d507, a round hole a508, a round hole b509, a round hole c510 and a round hole d511.
The oil duct a501, the oil duct b502 and the round hole d511 are sequentially communicated to form an oil path system for driving the hydraulic action section b 1602;
the guide groove a503 and the guide groove b505 are oppositely arranged at two sides of the drive pin installation stepped hole 504, and respectively provide a movement guide function for the guide pin a8 and the guide pin b 10;
the oil passage c506, the oil passage d507 and the round hole a508 are communicated in sequence to form an oil way system for driving the hydraulic action section a 1202;
the round holes a508 and b509, the round holes c510 and d511 are arranged on two sides of the driving pin mounting stepped hole 504 in an opposite mode, and the four axial lines of the round holes a508, b509, c510 and d511 are superposed and are perpendicular to the axial line of the driving pin mounting stepped hole 504;
the round hole a508 is communicated with the round hole b509, the hydrodynamic action section a1202 is in sliding connection with the hole wall of the round hole a508, and the positioning section a (1201) is in sliding connection with the round hole b 509;
the round hole c510 is communicated with the round hole d511, the hydraulic action section a1202 is in sliding connection with the hole wall of the round hole d511, and the positioning section b (1601) is in sliding connection with the round hole c 510.
Referring to the attached drawings, 1,6:
the valve driving pin 15 is provided with a round hole e1501, a guide pin mounting hole 1502, a lift positioning hole a1503, a lift positioning hole b1504 and a lift positioning hole c1505.
Wherein, the round hole e1501 is arranged at the center of the tail of the valve driving pin 15, and the axis thereof is superposed with the axis of the valve driving pin 15; the bottom of the round hole e1501 limits the spring b 9;
the axial lead of the guide pin mounting hole 1502 is vertical to the axial lead of the valve driving pin 15, and mounting positions are provided for the guide pin a8 and the guide pin b 10;
the three apertures of the lift positioning hole a1503, the lift positioning hole b1504 and the lift positioning hole c1505 are the same, the axes of the three apertures are parallel and perpendicular to the axis of the valve driving pin 15, and the different lift positioning holes control the lift of the valve 24.
By combining the components of the device and the installation position relationship thereof, the specific control principle and the working process of the technical scheme of the variable-displacement variable-lift valve mechanism of the engine are as follows:
when the oil passage a501 and the oil passage d507 are not supplied with high-pressure hydraulic oil, the spring force generated by the spring c13 and the spring d17 can respectively push the positioning section a (1201) of the positioning pin a12 and the positioning section b (1601) of the positioning pin b16 to extend into a lift positioning hole a1503, a lift positioning hole b1504 or a lift positioning hole c1505 arranged on the valve driving pin 15; when the oil passages a501 and d507 are supplied with high-pressure hydraulic oil, the hydraulic pressures acting on the hydraulically acting section a1202 and the hydraulically acting section b1602 can overcome the resistance of the spring c13 and the spring d17, so that the positioning section a (1201) of the positioning pin a12 and the positioning section b (1601) of the positioning pin b16 are completely retracted into the circular hole b509 and the circular hole c510, respectively; when the positioning section a (1201) of the positioning pin a12 and the positioning section b (1601) of the positioning pin b16 do not extend into the lift positioning hole formed in the valve driving pin 15, the spring force generated by the spring b9 can push the head of the valve driving pin 15 to fully extend when the head of the valve driving pin 15 is not in contact with the upper surface profile 303 of the rocker arm 3 on one hand, and can not overcome the pre-tightening force of the valve spring f24 to push the valve 24 to open when the head of the valve driving pin 15 is in contact with the upper surface profile 303 of the rocker arm 3 on the other hand.
When the engine does not stop the valve and the valve lift is fixed:
hydraulic oil in the oil passage a501 and the oil passage d507 is in a low-pressure state, and a positioning section a (1201) of the positioning pin a12 and a positioning section b (1601) of the positioning pin b16 are always in a lift positioning hole a1503, a lift positioning hole b1504 or a lift positioning hole c1505 of the valve driving pin 15; the head of the valve driving pin 15 drives the upper surface profile segment 303 of the rocker arm 3 to drive the valve 24 to move.
When the engine does not stop the valve and the valve lift needs to be adjusted:
the control oil passage a501 and the oil passage d507 are supplied with high-pressure hydraulic oil, the spring c13 and the spring d17 are compressed under the action of hydraulic power, the positioning section a (1201) of the positioning pin a12 and the positioning section b (1601) of the positioning pin b16 withdraw from the lift positioning hole of the corresponding valve driving pin 15, after the valve driving pin 15 moves to the upper surface profile section 303 of the rocker arm 3, the extension length of the head of the valve driving pin 15 is continuously changed under the action of the profile section 303, when the extension length of the head of the valve driving pin 15 reaches a specified lift, the control oil passage a501 and the oil passage d507 are supplied with low-pressure hydraulic oil, the positioning section a (1201) of the positioning pin a12 and the positioning section b (1601) of the positioning pin b16 are respectively extended into the specified lift positioning hole of the valve driving pin 15 under the action of spring c13 and the spring d17, and the engine works correspondingly.
When the engine needs to stop the valve:
the control oil passage a501 and the oil passage d507 are supplied with high-pressure hydraulic oil so that the head of the valve driving pin 15 cannot drive the valve 24 to open, depending on the engine operating state.
Claims (6)
1. A variable-displacement variable-lift valve mechanism of an engine is composed of a spring a (1), a support rod a (2), a rocker arm (3), a connecting pin a (4), a driving shaft (5), an oil plug a (6), a blocking seat a (7), a guide pin a (8), a spring b (9), a guide pin b (10), an oil plug b (11), a positioning pin a (12), a spring c (13), a blocking seat b (14), a valve driving pin (15), a positioning pin b (16), a spring d (17), a blocking seat c (18), a connecting pin b (19), a support rod b (20), a spring e (21), a cylinder cover (22), a valve spring (23) and a valve (24); wherein, the upper parts of the support rod a (2) and the support rod b (20) are respectively connected with the connecting pin a (4) and the connecting pin b (19) in a sliding way, the lower parts of the support rod a (2) and the support rod b (20) respectively extend into a mounting hole arranged on the cylinder cover (22), and the lower ends of the support rod a (2) and the support rod b are respectively provided with a spring a (1) and a spring e (21); the rocker arm (3) is arranged between the driving shaft (5) and the valve (24), the upper end surface of the rocker arm (3) is in sliding connection with the driving shaft (5), and the lower end surface of the rocker arm is in sliding connection with the valve (24); the left end and the right end of the rocker arm (3) are respectively connected on the connecting pin a (4) and the connecting pin b (19) in a sliding way; the oil block a (6) and the oil block b (11) are respectively connected to the outer sides of an oil passage b (502) and an oil passage c (506) which are formed in the driving shaft (5) through threads; the blocking seat a (7), the blocking seat b (14) and the blocking seat c (18) are respectively connected to the outer sides of a driving pin mounting stepped hole (504), a round hole a (508) and a round hole d (511) of the driving shaft (5) through threads; one ends of the guide pins a (8) and b (10) are fixedly connected in guide pin mounting holes (1502) formed in the valve driving pin (15), and the other ends of the guide pins a (8) and b (10) respectively extend into the guide grooves a (503) and b (505) and are in sliding connection with the guide grooves a (503) and b (505); the spring b (9) is arranged between the stop seat a (7) and the valve driving pin (15); the spring c (13) is arranged between the positioning pin a (12) and the stop seat b (14); the spring d (17) is arranged between the positioning pin b (16) and the stop seat c (18); the positioning pin a (12) and the positioning pin b (16) are oppositely arranged on two sides of the valve driving pin (15); the valve driving pin (15) is arranged in a driving pin mounting stepped hole (504) formed in the driving shaft (5) and is in sliding connection with the hole wall, and the head of the valve driving pin can extend out of the driving shaft (5) to drive the rocker arm (3).
2. The variable displacement variable lift valve mechanism of the engine according to claim 1, characterized in that the rocker arm (3) is provided with a leading-out section (301), a base circle section a (302), a profile line section (303), a base circle section b (304) and a leading-in section (305) on the upper surface.
3. The variable displacement variable lift valve mechanism of the engine according to claim 1, characterized in that the positioning pin a (12) and the positioning pin b (16) are of a three-segment structure, and the hydrodynamic action segment a (1202) is positioned between the positioning segment a (1201) and the limiting segment a (1203); the hydraulic action section b (1602) is positioned between the positioning section b (1601) and the limiting section b (1603); the positioning section a (1201), the hydraulic action section a (1202) and the limiting section a (1203) are coaxial; the positioning section b (1601), the hydraulic action section b (1602) and the limiting section b (1603) are coaxial.
4. The variable displacement variable lift valve mechanism of the engine according to claim 1, characterized in that the driving shaft (5) is provided with an oil passage a (501), an oil passage b (502), a guide groove a (503), a driving pin mounting stepped hole (504), a guide groove b (505), an oil passage c (506), an oil passage d (507), a circular hole a (508), a circular hole b (509), a circular hole c (510) and a circular hole d (511); the oil channel a (501), the oil channel b (502) and the round hole d (511) are communicated in sequence; the guide groove a (503) and the guide groove b (505) are oppositely arranged at two sides of the drive pin installation stepped hole (504); the oil passage c (506), the oil passage d (507) and the round hole a (508) are communicated in sequence; the round hole a (508), the round hole b (509), the round hole c (510) and the round hole d (511) are opposite to two sides of the driving pin installation stepped hole (504), and the axial lines of the round hole a (508), the round hole b (509), the round hole c (510) and the round hole d (511) are superposed and are perpendicular to the axial line of the driving pin installation stepped hole (504); the circular hole a (508) is communicated with the circular hole b (509), the hydraulic action section a (1202) is in sliding connection with the hole wall of the circular hole a (508), and the positioning section a (1201) is in sliding connection with the circular hole b (509); the round hole c (510) is communicated with the round hole d (511), the hydraulic action section a (1202) is in sliding connection with the hole wall of the round hole d (511), and the positioning section b (1601) is in sliding connection with the round hole c (510).
5. The variable displacement and variable lift valve mechanism of the engine according to claim 1, characterized in that the valve driving pin (15) is provided with a round hole e (1501), a guide pin mounting hole (1502), a lift positioning hole a (1503), a lift positioning hole b (1504) and a lift positioning hole c (1505); wherein, the round hole e (1501) is arranged at the central position of the tail part of the valve driving pin (15), and the axial lead of the round hole e (1501) is superposed with the axial lead of the valve driving pin (15); the axial lead of the guide pin mounting hole (1502) is vertical to the axial lead of the valve driving pin (15); the lift positioning hole a (1503), the lift positioning hole b (1504) and the lift positioning hole c (1505) are identical in hole diameter, parallel to the axis, and perpendicular to the axis of the valve driving pin (15).
6. The variable displacement variable lift valve mechanism of the engine according to claim 1, characterized in that the spring b (9), the spring c (13) and the spring d (17) have certain pretightening force during installation, when the oil passage a (501) and the oil passage d (507) are not supplied with high-pressure hydraulic oil, the spring force generated by the spring c (13) and the spring d (17) can respectively push the positioning section a (1201) of the positioning pin a (12) and the positioning section b (1601) of the positioning pin b (16) to extend into the lift positioning hole a (1503), the lift positioning hole b (1504) or the lift positioning hole c (1505) arranged on the valve driving pin (15); when the oil passage a (501) and the oil passage d (507) are supplied with high-pressure hydraulic oil, hydraulic pressure acting on the hydraulic action section a (1202) and the hydraulic action section b (1602) can overcome the resistance of the spring c (13) and the spring d (17), so that the positioning section a (1201) of the locating pin a (12) and the positioning section b (1601) of the locating pin b (16) are completely retracted into the circular hole b (509) and the circular hole c (510), respectively; when the positioning section a (1201) of the positioning pin a (12) and the positioning section b (1601) of the positioning pin b (16) do not extend into a lift positioning hole formed in the valve driving pin (15), the spring force generated by the spring b (9) can push the head of the valve driving pin (15) to completely extend when the head of the valve driving pin (15) is not in contact with the upper surface profile (303) of the rocker arm (3), and on the other hand, the head of the valve driving pin (15) cannot overcome the pre-tightening force of the valve spring f when the head of the valve driving pin (15) is in contact with the upper surface profile (303) of the rocker arm (3) to push the valve (24) to open.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710769963.1A CN107355277B (en) | 2017-08-31 | 2017-08-31 | Variable-displacement variable-lift valve mechanism of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710769963.1A CN107355277B (en) | 2017-08-31 | 2017-08-31 | Variable-displacement variable-lift valve mechanism of engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107355277A CN107355277A (en) | 2017-11-17 |
| CN107355277B true CN107355277B (en) | 2023-04-07 |
Family
ID=60288661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710769963.1A Active CN107355277B (en) | 2017-08-31 | 2017-08-31 | Variable-displacement variable-lift valve mechanism of engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107355277B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110836143B (en) * | 2018-08-16 | 2021-07-27 | 上海汽车集团股份有限公司 | Method and system for judging variable valve lift switching |
| CN113236395B (en) * | 2021-05-19 | 2023-03-24 | 重庆长安汽车股份有限公司 | Actuator mounting structure of variable valve lift system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101215979A (en) * | 2008-01-15 | 2008-07-09 | 冯子光 | Engine air valve distribution device |
| DE102007010148A1 (en) * | 2007-03-02 | 2008-09-04 | Audi Ag | Valve gear for internal combustion engine, includes bearing which can be slid along cam shaft with cam carriers, relative to engine casing |
| CN201507332U (en) * | 2009-09-16 | 2010-06-16 | 杨奇明 | Continuously variable engine valve lift regulating mechanism |
| JP2012002095A (en) * | 2010-06-15 | 2012-01-05 | Honda Motor Co Ltd | Variable valve system of internal combustion engine |
| CN205382988U (en) * | 2016-02-04 | 2016-07-13 | 吉林大学 | Two membrane box -shaped gasoline engine exhaust turbine bypass valve control structures |
| CN107100689A (en) * | 2017-06-28 | 2017-08-29 | 吉林大学 | A kind of solenoid-operated hydraulic drive-type fully variable valve actuator for air |
| CN207177987U (en) * | 2017-08-31 | 2018-04-03 | 吉林大学 | A kind of engine variable discharge capacity variable lift valve operating mechanism |
-
2017
- 2017-08-31 CN CN201710769963.1A patent/CN107355277B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007010148A1 (en) * | 2007-03-02 | 2008-09-04 | Audi Ag | Valve gear for internal combustion engine, includes bearing which can be slid along cam shaft with cam carriers, relative to engine casing |
| CN101215979A (en) * | 2008-01-15 | 2008-07-09 | 冯子光 | Engine air valve distribution device |
| CN201507332U (en) * | 2009-09-16 | 2010-06-16 | 杨奇明 | Continuously variable engine valve lift regulating mechanism |
| JP2012002095A (en) * | 2010-06-15 | 2012-01-05 | Honda Motor Co Ltd | Variable valve system of internal combustion engine |
| CN205382988U (en) * | 2016-02-04 | 2016-07-13 | 吉林大学 | Two membrane box -shaped gasoline engine exhaust turbine bypass valve control structures |
| CN107100689A (en) * | 2017-06-28 | 2017-08-29 | 吉林大学 | A kind of solenoid-operated hydraulic drive-type fully variable valve actuator for air |
| CN207177987U (en) * | 2017-08-31 | 2018-04-03 | 吉林大学 | A kind of engine variable discharge capacity variable lift valve operating mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107355277A (en) | 2017-11-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107355277B (en) | Variable-displacement variable-lift valve mechanism of engine | |
| CN102926833B (en) | Mechanical type lever proportion regulating mechanism | |
| CN104704210B (en) | The hybrid camless variable valve actuation system of cam | |
| CN101078375A (en) | Gasoline engine valve lift and phase variable system | |
| CN108240244B (en) | Variable system of diesel engine inlet valve and diesel engine | |
| CN202140127U (en) | Driving mechanism of engine braking device | |
| CN106442191B (en) | Valve wear test device | |
| CN104018905A (en) | Variable stroke engine hydraulic type air distribution switching mechanism | |
| CN207377616U (en) | A kind of hydraulic-driven variable valve actuator for air of low voltage control high pressure | |
| CN210660239U (en) | Engine valve driving mechanism | |
| CN202926418U (en) | Frame type air valve executing device with auxiliary rocker arm and driven by auxiliary cam | |
| CN109653829B (en) | Electro-hydraulic control method and device for valve lag angle | |
| CN109339896B (en) | Full-variable liquid valve device | |
| CN219638911U (en) | Auxiliary valve driving mechanism | |
| CN102278162A (en) | Variable valve lift mechanism | |
| CN203796643U (en) | Adjustable throttling hydraulic lock of coal mining machine | |
| CN206458760U (en) | A kind of buffer plunger structure | |
| CN207177987U (en) | A kind of engine variable discharge capacity variable lift valve operating mechanism | |
| CN211474201U (en) | Fully variable valve system of engine | |
| CN203412838U (en) | Hydraulic control one-way valve for hydraulic system of excavator | |
| CN212338196U (en) | Bidirectional throttle valve and pantograph air supply control system formed by same | |
| CN1948721A (en) | Three air valve motorcycle motor variable air inlet valve air distribution device | |
| CN211820167U (en) | Hydraulic oil cylinder with combined throttling buffer device | |
| CN208778846U (en) | A kind of valve core structure that control efficiency can be improved | |
| CN203050902U (en) | Flow control valve used for diesel engine |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |