CN103670579A - Mechanism for continuously adjusting engine valve lift - Google Patents
Mechanism for continuously adjusting engine valve lift Download PDFInfo
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- CN103670579A CN103670579A CN201310620031.2A CN201310620031A CN103670579A CN 103670579 A CN103670579 A CN 103670579A CN 201310620031 A CN201310620031 A CN 201310620031A CN 103670579 A CN103670579 A CN 103670579A
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- arm
- eccentric shaft
- roller
- swing arm
- valve lift
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Abstract
A mechanism for continuously adjusting engine valve lift is used for solving the problem of matching between the engine valve lift and engine running conditions. The mechanism comprises an adjusting arm assembly, a swinging arm, a connecting arm, a rocking arm, an eccentric shaft and a motor, the adjusting arm assembly is hinged to the connecting arm through an adjusting pin, the connecting arm is fixedly assembled with the swinging arm which is assembled with the rocking arm, two ends of the rocking arm are assembled with a valve and a hydraulic tappet respectively, the eccentric shaft is connected with a motor output shaft, and a set of eccentric wheel is arranged on the eccentric shaft. The mechanism is characterized in that a set of eccentric shaft adjusting plate is further arranged, the eccentric shaft adjusting plate is assembled with the eccentric shaft through a reciprocating motion support, a first working face matched with the eccentric wheel and a second working face matched with the adjusting arm assembly are arranged on the eccentric shaft adjusting plate, and the second working face is a circular-arc working face. By the mechanism, requirements on air inflow of an engine under different working conditions are met, the number of parts is reduced, and manufacturing cost of the parts is lowered.
Description
Technical field
The present invention relates to a kind of motor car engine, especially a kind of valve lift continuous setup mechanism of motor car engine gas distribution system, belongs to technical field of internal combustion engines.
Background technique
The valve lift of conventional engines gas distribution system is changeless, and it is foundation that the required air inflow of high engine speeds high load working condition is generally take in the design of valve lift, the outer profile curve form fit of it and valve cam.Because motor demand to air inflow under different operating conditionss there are differences, valve lift corresponding under high speed high load working condition is large, the valve lift that low speed small load condition is corresponding is little, therefore, there is excessive unlatching phenomenon in conventional engines valve under slow-speed of revolution small load condition, although petrol engine can be realized the adjustment to air inflow by reducing the aperture of closure, but the throttling action of closure can produce pumping loss, the mechanical loss work that excessive valve lift causes simultaneously increases, and has reduced the working efficiency of motor.
For addressing the above problem, internal-combustion engine engineering teachers are devoted to the research of lift range variable technology, discussion carrys out the method for air inflow under the different operating conditionss of control engine by the variation of valve opening, and early stage lift range variable technology is discontinuous to the adjustment of valve lift, the sudden change of valve lift causes the continuity of system poor, is difficult to fully meet the requirement of air inflow under different operating modes.Along with the appearance of continuously variable valve lift technology, air input of engine by air and its operating conditions matching problem are resolved, and have improved the working efficiency of motor.For example, application number is that 200480037308.8 Chinese patent discloses a kind of variable valve actuator for air, this variable valve actuator for air is the lift amount of air door body and the variable valve actuator for air of working angle that can change internal-combustion engine, and it has: the first cam rotating along with the rotation of crank; Transferring elements, has the second cam, and the rotary synchronous of this second cam and the first cam swings, and the force transmission of the first cam is arrived to air door body; Be adjusted to the Control Shaft of the rotational position of regulation; According to the rotational position of Control Shaft, change the hunting range of transferring elements, and change the changeable mechanism of lift amount and the working angle of air door body; The sky spring of moving, makes transferring elements to the first cam application of force, thereby maintains the connection between transferring elements and the first cam; And secondary spring, the active force of the empty spring of moving of resistance and to the transferring elements application of force.The technological scheme of this patent can realize the continuous setup of valve lift, has reached the object that reduces valve lift regulating mechanism load simultaneously, but because its first cam and transferring elements are the line way of contact, has a large problem of wearing and tearing between part; This variable valve actuator for air amount of parts is many simultaneously, and complex structure has not only increased manufacturing process difficulty and the cost of component, and mechanism's reliability of operation is difficult for guaranteeing.
Summary of the invention
The object of the invention is to the drawback for prior art, provide a kind of and can meet the requirement of Under Different Work Condition of Engine air inflow, can reduce again amount of parts, reduce component manufacture cost, reliable engine air valve lift continuous setup mechanism.
Problem of the present invention realizes with following technical proposals:
A kind of engine air valve lift continuous setup mechanism, it comprises regulating arm assembly, swing arm, link arm, rocking arm, eccentric shaft and motor, described regulating arm assembly is hinged by adjusting pin and link arm, the fixing assembling of described link arm and swing arm, described swing arm and rocking arm are equipped, assemble with valve and hydraulic tappet respectively at described rocking arm two ends, described eccentric shaft is connected with motor output shaft, one group of eccentric wheel is set on eccentric shaft, its specialization is: it is also provided with one group of eccentric shaft regulator plate, described eccentric shaft regulator plate is equipped by to-and-fro motion support and eccentric shaft, the first working surface coordinating with eccentric wheel and the second working surface coordinating with regulating arm assembly are set on eccentric shaft regulator plate, described the second working surface is circular arc working surface.
Above-mentioned engine air valve lift continuous setup mechanism, described eccentric wheel and eccentric shaft regulator plate quantity are mated with engine cylinder number.
Above-mentioned engine air valve lift continuous setup mechanism, described regulating arm assembly comprises that regulating arm body, first regulates roller and second to regulate roller, described regulating arm body top arranges the regulating arm hinging hole equipped with adjusting pin, described first regulates roller to be arranged on the middle part of regulating arm body, it mates with the second working surface of eccentric shaft regulator plate, described second regulates roller to be arranged on the bottom of regulating arm body, and regulating arm assembly passes to swing arm by the second adjusting roller by the thrust of eccentric shaft regulator plate.
Above-mentioned engine air valve lift continuous setup mechanism, described swing arm is arranged symmetrically in the both sides of link arm, the swing arm sleeve pipe equipped with link arm is set in swing arm upper end, swing arm and link arm are fixed on the same axis, they can rotate around the center of this stationary axle, and limit its swing position by swing arm Returnning spring, in swing arm bottom, the arc-shaped curved surface equipped with rocking arm is set, between described sleeve pipe and arc-shaped curved surface, by supporting rib, connect, the outer side surface of described supporting rib regulates roller to mate with second of regulating arm assembly, one end of described arc-shaped curved surface arranges recessed poor structure, described swing arm Returnning spring is fixed on the bearing support of engine cam, its free end is installed in swing arm groove.
Above-mentioned engine air valve lift continuous setup mechanism, described link arm is comprised of link arm sleeve pipe and link arm fin, described link arm fin comprises left and right two-part, they are all fixedly assemblied on link arm sleeve pipe, in link arm fin upper end, link arm hinging hole is set, described link arm hinging hole and adjusting pin are equipped.
Above-mentioned engine air valve lift continuous setup mechanism, described rocking arm middle part is provided with rocker-arm roller, and described rocker-arm roller is equipped with the arc-shaped curved surface of swing arm bottom.
Above-mentioned engine air valve lift continuous setup mechanism, it is also provided with mediate roller, and described mediate roller is contained in adjusting pin outside by bearing housing, and it is positioned in the middle of two of the left and right link arm fin of link arm, and mediate roller is mated with engine cam.
Above-mentioned engine air valve lift continuous setup mechanism, described motor is arranged on engine cylinder-body.
Eccentric shaft of the present invention is driven and is rotated by motor, make the eccentric wheel on eccentric shaft promote the periodically to-and-fro motion of eccentric shaft regulator plate, when eccentric wheel promotion eccentric shaft regulator plate moves to camshaft direction, the second working surface of eccentric shaft regulator plate (being circular arc working surface) regulates roller by transmission of power to first of regulating arm assembly, regulating arm assembly is clockwise rotated around adjusting pin, by second of regulating arm assembly, regulating roller to promote swing arm clockwise rotates around swing arm stationary axle, the arc-shaped curved surface of swing arm bottom drives rocker-arm roller to clockwise rotate, thereby the valve that promotes rocking arm one end moves downward, make valve when opening state and the distance of valve seat increases, strengthened the aperture of valve, guaranteed the air inflow of motor under high speed high load working condition, when eccentric wheel turns over after several angle, the second working surface of eccentric shaft regulator plate is to regulating first of arm assembly to regulate the thrust of roller to disappear, now swing arm Returnning spring promotion swing arm rotates counterclockwise around swing arm stationary axle, regulating arm assembly is rotated counterclockwise around adjusting pin, keep regulating arm assembly first to regulate the contact condition of roller and eccentric shaft regulator plate the second working surface, the arc-shaped curved surface of the bottom of swing arm simultaneously drives rocker-arm roller to rotate counterclockwise, valve resets under the elastic force effect of valve spring, make valve when opening state and the distance of valve seat reduces, reduced the aperture of valve, air input of engine by air and low speed small load condition are matched.The present invention is in above-mentioned working procedure, first of regulating arm assembly regulates roller and eccentric shaft regulator plate to remain contact condition, because eccentric shaft regulator plate has adopted circular arc working surface, with the first cam and transferring elements in prior art be the technological scheme comparison of the line way of contact, the first wearing and tearing that regulate between roller and eccentric shaft regulator plate have been alleviated, the working life of having improved component; The present invention is optimized for split left and right formula structure by swing arm, adjusts the transferring power that coordinates of roller by swing arm outside-supporting muscle and regulating arm second, not only makes swing arm structure simplify, and has reduced the technology difficulty that swing arm is manufactured, and is convenient to the assembling of component; The present invention adopts the driving mode of the moving eccentric shaft of motor straight tape splicing, has reduced the mechanical loss of transmission of power, has improved the reliability of transmission of power.In a word, the present invention had both met the requirement of Under Different Work Condition of Engine air inflow, had reduced again amount of parts, had reduced the manufacture cost of component.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is structural representation of the present invention;
Fig. 2 is the present invention's structural representation that explodes;
Fig. 3 is eccentric shaft regulator plate structural representation;
Fig. 4 is rocker structure schematic diagram;
Fig. 5 is regulating arm structural representation;
Fig. 6 is swing arm structure schematic diagram;
Fig. 7 is link arm structural representation;
Fig. 8 is regulating arm, swing arm, link arm, rocking arm, mediate roller and adjusting pin assembly relation schematic diagram;
Fig. 9, Figure 10 are working procedure schematic diagram of the present invention.
In figure, each list of reference numerals is: 1, engine cam, 2, adjusting pin, 3, mediate roller, 4, eccentric shaft, 5, eccentric shaft regulator plate, 5-1, to-and-fro motion support, 5-2, the first working surface, 5-3, the second working surface, 6, rocking arm, 6-1, rocker-arm roller, 7, valve, 8, hydraulic tappet, 9, regulating arm assembly, 9-1, regulating arm body, 9-2, first regulates roller, 9-3, second regulates roller, 9-4, regulating arm hinging hole, 10, swing arm, 10-1, swing arm sleeve pipe, 10-2, arc-shaped curved surface, 10-3, groove, 10-4, supporting rib, 11, link arm, 11-1, link arm sleeve pipe, 11-2, link arm fin, 11-3, link arm hinging hole, 12, swing arm Returnning spring, 13, motor.
Embodiment
Referring to Fig. 1, Fig. 2, Fig. 3, the present invention includes regulating arm assembly 9, swing arm 10, link arm 11, rocking arm 6, eccentric shaft 4 and motor 13, described regulating arm assembly 9 is hinged by adjusting pin 2 and link arm 11, described link arm 11 and the fixing assembling of swing arm 10, described swing arm 10 is equipped with rocking arm 6, assemble with valve 7 and hydraulic tappet 8 respectively at described rocking arm 6 two ends, described eccentric shaft 4 is connected with the output shaft of motor 13, described motor 11 is arranged on engine cylinder-body, one group of eccentric wheel is set on eccentric shaft 4, its specialization is: it is also provided with one group of eccentric shaft regulator plate 5, described eccentric shaft regulator plate 5 is equipped by to-and-fro motion support 5-1 and eccentric shaft 4, the the first working surface 5-2 coordinating with eccentric wheel and the second working surface 5-3 coordinating with regulating arm assembly 9 are set on eccentric shaft regulator plate 5, described the second working surface 5-3 is circular arc working surface, the quantity of described eccentric wheel and eccentric shaft regulator plate 5 is mated with engine cylinder number.
Referring to Fig. 1, Fig. 5, Fig. 8, regulating arm assembly 9 of the present invention comprises that regulating arm body 9-1, first regulates roller 9-2 and second to regulate roller 9-3, described regulating arm body 9-1 top arranges the regulating arm hinging hole 9-4 equipped with adjusting pin 2, described first regulates roller 9-2 to be arranged on the middle part of regulating arm body 9-1, it mates with the second working surface 5-3 of eccentric shaft regulator plate 5, described second regulates roller 9-3 to be arranged on the bottom of regulating arm body 9-1, and regulating arm assembly 9 passes to swing arm 10 by the second adjusting roller 9-3 by the thrust of eccentric shaft regulator plate 5.
Referring to Fig. 1, Fig. 6, Fig. 8, swing arm 10 of the present invention is arranged symmetrically in the both sides of link arm 11, in swing arm 10 upper ends, the swing arm sleeve pipe 10-1 equipped with link arm 11 is set, swing arm 10 is fixed on the same axis with link arm 11, they can rotate around the center of this stationary axle, and limit its swing position by swing arm Returnning spring 12, in swing arm 10 bottoms, the arc-shaped curved surface 10-2 equipped with rocking arm 6 is set, between described swing arm sleeve pipe 10-1 and arc-shaped curved surface 10-2, by supporting rib 10-4, connect, the outer side surface of described supporting rib 10-4 regulates roller 9-3 to mate with second of regulating arm assembly 9, one end of described arc-shaped curved surface 10-2 arranges recessed poor 10-3 structure, described swing arm Returnning spring 12 is fixed on the bearing support of engine cam 1, its free end is installed in swing arm groove 10-3.
Referring to Fig. 1, Fig. 7, Fig. 8, link arm 11 of the present invention is comprised of link arm sleeve pipe 11-1 and link arm fin 11-2, described link arm fin 11-2 comprises left and right two-part, they are all fixedly assemblied on link arm sleeve pipe 11-1, in link arm fin 11-1 upper end, link arm hinging hole 11-3 is set, described link arm hinging hole 11-3 and adjusting pin 2 are equipped.
Referring to Fig. 1, Fig. 4, Fig. 8, rocking arm of the present invention 6 middle parts are provided with rocker-arm roller 6-1, and described rocker-arm roller 6-1 and swing arm bottom arc-shaped curved surface 10-2 are equipped.
Referring to Fig. 1, Fig. 2, Fig. 8, the present invention is also provided with mediate roller 3, and described mediate roller 3 is contained in adjusting pin 2 outsides by bearing housing, and it is positioned in the middle of two of the left and right link arm fin 11-2 of link arm 11, and mediate roller 3 is mated with engine cam 1.
Referring to Fig. 9, Figure 10, eccentric shaft 4 of the present invention is driven and is rotated by motor 13, make the eccentric wheel on eccentric shaft 3 promote the 5 periodically to-and-fro motion of eccentric shaft regulator plate, when eccentric wheel promotes eccentric shaft regulator plate 5 to engine cam 1 direction motion, the second working surface 5-3(of eccentric shaft regulator plate 5 is circular arc working surface) transmission of power is regulated to roller 9-2 to first of regulating arm assembly 9, regulating arm assembly 9 is clockwise rotated around adjusting pin 2, by second of regulating arm assembly 9, regulating roller 9-3 to promote swing arm 10 clockwise rotates around swing arm stationary axle, the arc-shaped curved surface 10-2 of swing arm 10 bottoms drives rocker-arm roller 6-1 to clockwise rotate, thereby the valve 7 that promotes rocking arm 6 one end moves downward, make valve 7 when opening state and the distance of valve seat increases (H2 > H1), strengthened the aperture of valve 7, guaranteed the air inflow of motor under high speed high load working condition, when eccentric wheel turns over after several angle, the second working surface 5-3(circular arc working surface of eccentric shaft regulator plate 5) to regulating first of arm assembly 9 to regulate the thrust of roller 9-2 to disappear, now swing arm Returnning spring 12 promotion swing arms 10 rotate counterclockwise around swing arm stationary axle, regulating arm assembly 9 is rotated counterclockwise around adjusting pin 2, maintenance regulating arm assembly 9 first adjusting roller 9-2 and eccentric shaft regulator plate 5 second working surface 5-3(circular arc working surfaces) contact condition, the arc-shaped curved surface 10-2 of swing arm 10 bottoms drives rocker-arm roller 6-1 to rotate counterclockwise simultaneously, valve 7 resets under the elastic force effect of valve spring, make valve when opening state and the distance of valve seat reduces (H1 < H2), reduced the aperture of valve, air input of engine by air and low speed small load condition are matched.
Claims (8)
1. an engine air valve lift continuous setup mechanism, it comprises regulating arm assembly (9), swing arm (10), link arm (11), rocking arm (6), eccentric shaft (4) and motor (13), described regulating arm assembly (9) is hinged by adjusting pin (2) and link arm (11), described link arm (11) and the fixing assembling of swing arm (10), described swing arm (10) is equipped with rocking arm (6), assemble with valve (7) and hydraulic tappet (8) respectively at described rocking arm (6) two ends, described eccentric shaft (4) is connected with the output shaft of motor (13), one group of eccentric wheel is set on eccentric shaft (4), it is characterized in that, it is also provided with one group of eccentric shaft regulator plate (5), described eccentric shaft regulator plate (5) is equipped by to-and-fro motion support (5-1) and eccentric shaft (4), at upper the first working surface (5-2) coordinating with eccentric wheel and the second working surface (5-3) coordinating with regulating arm assembly (9) of arranging of eccentric shaft regulator plate (5), described the second working surface (5-3) is circular arc working surface.
2. a kind of engine air valve lift continuous setup according to claim 1 mechanism, is characterized in that, the quantity of described eccentric wheel and eccentric shaft regulator plate (5) is mated with engine cylinder number.
3. a kind of engine air valve lift continuous setup according to claim 2 mechanism, it is characterized in that, described regulating arm assembly (9) comprises regulating arm body (9-1), first regulates roller (9-2) and second to regulate roller (9-3), described regulating arm body (9-1) top arranges the regulating arm hinging hole (9-4) equipped with adjusting pin (2), described first regulates roller (9-2) to be arranged on the middle part of regulating arm body (9-1), it mates with second working surface (5-3) of eccentric shaft regulator plate (5), described second regulates roller (9-3) to be arranged on the bottom of regulating arm body (9-1), regulating arm assembly (9) regulates roller (9-3) that the thrust of eccentric shaft regulator plate (5) is passed to swing arm (10) by second.
4. according to a kind of engine air valve lift continuous setup mechanism described in claim 1 or 2 or 3, it is characterized in that, described swing arm (10) is arranged symmetrically in the both sides of link arm (11), the swing arm sleeve pipe (10-1) equipped with link arm (11) is set in swing arm (10) upper end, swing arm (10) is fixed on the same axis with link arm (11), they can rotate around the center of this stationary axle, and limit its swing position by swing arm Returnning spring (12), in swing arm (10) bottom, the arc-shaped curved surface (10-2) equipped with rocking arm (6) is set, between described swing arm sleeve pipe (10-1) and arc-shaped curved surface (10-2), by supporting rib (10-4), connect, the outer side surface of described supporting rib (10-4) regulates roller (9-3) to mate with second of regulating arm assembly (9), one end of described arc-shaped curved surface (10-2) arranges recessed grain (10-3) structure, described swing arm Returnning spring (12) is fixed on the bearing support of engine cam (1), its free end is installed in swing arm groove (10-3).
5. a kind of engine air valve lift continuous setup according to claim 4 mechanism, it is characterized in that, described link arm (11) is comprised of link arm sleeve pipe (11-1) and link arm fin (11-2), described link arm fin (11-2) comprises left and right two-part, they are all fixedly assemblied on link arm sleeve pipe (11-1), in link arm fin (11-1) upper end, link arm hinging hole (11-3) is set, described link arm hinging hole (11-3) is equipped with adjusting pin (2).
6. a kind of engine air valve lift continuous setup according to claim 5 mechanism, is characterized in that, described rocking arm (6) middle part is provided with rocker-arm roller (6-1), and described rocker-arm roller (6-1) is equipped with swing arm bottom arc-shaped curved surface (10-2).
7. according to a kind of engine air valve lift continuous setup mechanism described in claim 1 or 6, it is characterized in that, it is also provided with mediate roller (3), described mediate roller (3) is contained in adjusting pin (2) outside by bearing housing, it is positioned in the middle of two the link arm fins in left and right (11-2) of link arm (11), and mediate roller (3) is mated with engine cam (1).
8. a kind of engine air valve lift continuous setup according to claim 7 mechanism, is characterized in that, described motor (13) is arranged on engine cylinder-body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310620031.2A CN103670579B (en) | 2013-11-29 | 2013-11-29 | A kind of engine air valve lift continuous setup mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310620031.2A CN103670579B (en) | 2013-11-29 | 2013-11-29 | A kind of engine air valve lift continuous setup mechanism |
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| CN103670579A true CN103670579A (en) | 2014-03-26 |
| CN103670579B CN103670579B (en) | 2016-01-20 |
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| CN201310620031.2A Active CN103670579B (en) | 2013-11-29 | 2013-11-29 | A kind of engine air valve lift continuous setup mechanism |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832236A (en) * | 2014-12-18 | 2015-08-12 | 北汽福田汽车股份有限公司 | Engine valve pre-operation apparatus |
| CN105065598A (en) * | 2015-07-07 | 2015-11-18 | 深圳市白狐工业设计有限公司 | Reciprocating intermittent motion mechanism |
| WO2017101578A1 (en) * | 2015-12-17 | 2017-06-22 | 广州汽车集团股份有限公司 | Continuously variable valve lift system and automobile |
| CN109779715A (en) * | 2019-02-26 | 2019-05-21 | 浙江大学 | A kind of variable valve timing-lift device and its control method |
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| JP2010169005A (en) * | 2009-01-23 | 2010-08-05 | Hitachi Automotive Systems Ltd | Variable valve gear for internal combustion engine |
| CN102155273A (en) * | 2011-04-08 | 2011-08-17 | 奇瑞汽车股份有限公司 | Variable gas distribution mechanism of engine |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832236A (en) * | 2014-12-18 | 2015-08-12 | 北汽福田汽车股份有限公司 | Engine valve pre-operation apparatus |
| CN105065598A (en) * | 2015-07-07 | 2015-11-18 | 深圳市白狐工业设计有限公司 | Reciprocating intermittent motion mechanism |
| WO2017101578A1 (en) * | 2015-12-17 | 2017-06-22 | 广州汽车集团股份有限公司 | Continuously variable valve lift system and automobile |
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| US10415440B2 (en) | 2015-12-17 | 2019-09-17 | Guangzhou Automobile Group Co., Ltd. | Continuously variable valve lift system and automobile |
| CN109779715A (en) * | 2019-02-26 | 2019-05-21 | 浙江大学 | A kind of variable valve timing-lift device and its control method |
| CN109779715B (en) * | 2019-02-26 | 2020-01-17 | 浙江大学 | Variable gas distribution timing-lift device and control method thereof |
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| CN103670579B (en) | 2016-01-20 |
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