CN113236394A - Valve mechanism of engine four-valve cylinder - Google Patents
Valve mechanism of engine four-valve cylinder Download PDFInfo
- Publication number
- CN113236394A CN113236394A CN202110521940.5A CN202110521940A CN113236394A CN 113236394 A CN113236394 A CN 113236394A CN 202110521940 A CN202110521940 A CN 202110521940A CN 113236394 A CN113236394 A CN 113236394A
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- valve
- arm
- push rod
- rocker arm
- engine
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- 230000007246 mechanism Effects 0.000 title claims abstract description 21
- 230000000712 assembly Effects 0.000 claims description 9
- 238000000429 assembly Methods 0.000 claims description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 239000003345 natural gas Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 14
- 238000009434 installation Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical group Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
- F01L1/265—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder peculiar to machines or engines with three or more intake valves per cylinder
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The invention discloses a valve actuating mechanism of a four-valve cylinder of an engine. The valve lifter comprises a first valve (3), a second valve (7), a camshaft (15), a rocker base (9), a first rocker (2), a second rocker (6), a first push rod (11), a second push rod (12), a first tappet (13) and a second tappet (14), wherein the camshaft is installed below a cylinder head (1), a first rotating shaft (201) and a second rotating shaft (601) are installed in the rocker base, the first valve arm (202) and the second valve arm (602) are respectively connected with the first valve and the second valve in an installing mode, the upper end of the first push rod is hinged to a first push rod arm (203), the upper end of the second push rod is hinged to a second push rod arm (603), and the lower ends of the first push rod and the second push rod are respectively abutted to the camshaft through the first tappet and the second tappet. The valve actuating mechanism of the invention reduces the weight and the volume of the engine, improves the transmission reliability and avoids the transmission noise.
Description
Technical Field
The invention relates to an engine valve actuating mechanism, in particular to a valve actuating mechanism of a four-valve cylinder of an engine.
Background
With the development of internal combustion engine technology, more and more engines adopt four-valve cylinders, wherein the four-valve cylinder is that four valves are arranged on the cylinder, two valves are intake valves, and the other two valves are exhaust valves. The four-valve cylinder has better intake and exhaust efficiency than the traditional two-valve cylinder, so the four-valve cylinder is adopted by more and more engines.
The four valves on the current four-valve cylinder usually adopt two arrangement forms, one is a diamond arrangement form, and the other is a rectangular symmetrical arrangement form. Because the rectangular symmetrical arrangement form is relative to the rhombic arrangement form, the rectangular symmetrical arrangement form is more favorable for increasing the section of an air inlet and outlet channel, shortening the distance of the air inlet and outlet channel and reducing the wall loss of the air channel, thereby achieving the effect of reducing the oil consumption of an engine, and the rectangular symmetrical arrangement form of the four valves gradually replaces the rhombic arrangement form.
However, the current four-valve rectangular symmetrical arrangement mode needs to adopt two overhead camshafts, wherein one camshaft is arranged on the side of an intake valve and used for driving the opening and closing of the intake valve, and the other camshaft is arranged on the side of an exhaust valve and used for driving the opening and closing of the exhaust valve. Because two camshafts are required to be arranged, the cylinder head and the cylinder head cover of the engine are required to be widened, so that the overall weight and the size of the engine are increased, and the weight reduction of a vehicle where the engine is located and the economical utilization of the installation space of the engine are not facilitated. In addition, because two camshafts are overhead, and the crankshaft in the engine is located at the bottom of the engine, the distance between the two camshafts is long, a complex transmission mechanism needs to be arranged between the crankshaft and the camshafts, the transmission reliability is reduced due to the complex transmission mechanism, large transmission noise can be caused, and meanwhile, the installation and maintenance of the engine are not facilitated.
Disclosure of Invention
The invention aims to provide a valve actuating mechanism of a four-valve cylinder of an engine, which is characterized in that a camshaft positioned below a cylinder cover of the cylinder is arranged in the valve actuating mechanism, so that the four valves in a rectangular symmetrical arrangement mode can be controlled to be opened and closed, the overall weight and the volume of the engine are reduced, the transmission reliability is improved, and the transmission noise is avoided.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a valve actuating mechanism of an engine four-valve cylinder comprises two first valves and two second valves which are arranged on a cylinder cover of the engine cylinder, wherein the two first valves and the two second valves are arranged on the cylinder cover in a pairwise symmetrical rectangular manner; the valve timing mechanism further comprises a camshaft, a rocker arm seat, a first rocker arm, a second rocker arm, a first push rod, a second push rod, a first tappet and a second tappet; the camshaft is arranged on the engine and is positioned below a cylinder cover of the cylinder; the rocker arm seat is fixedly arranged on the cylinder cover of the cylinder, and a first shaft hole and a second shaft hole are formed in the rocker arm seat; the first rocker arm comprises a first rotating shaft, a first valve arm and a first push rod arm, and the first valve arm and the first push rod arm are fixedly arranged on two sides of the first rotating shaft respectively; the first rotating shaft is arranged in a first shaft hole of the rocker arm seat; the second rocker arm comprises a second rotating shaft, a second valve arm and a second push rod arm, and the second valve arm and the second push rod arm are fixedly arranged on two sides of the second rotating shaft respectively; the second rotating shaft is arranged in a second shaft hole of the rocker arm seat; the first rotating shaft of the first rocker arm and the second rotating shaft of the second rocker arm are positioned at one side of the two second valves, the first valve arm of the first rocker arm bypasses the second valves and is connected with the first valves in an installing manner, and the second valve arm of the second rocker arm is connected with the second valves in an installing manner; the upper end of the first push rod is hinged with a first push rod arm of the first rocker arm, and the lower end of the first push rod abuts against a cam of the camshaft through the first tappet; the upper end of the second push rod is hinged with a second push rod arm of the second rocker arm, and the lower end of the second push rod abuts against a cam of the camshaft through the second tappet.
Further, the first valve is an intake valve and the second valve is an exhaust valve.
Further, the first valve is an exhaust valve and the second valve is an intake valve.
Furthermore, the valve train further comprises four valve installation assemblies, the first valve arm of the first rocker arm is connected with the two first valves through the two valve installation assemblies, and the second valve arm of the second rocker arm is connected with the two second valves through the other two valve installation assemblies.
Further, the valve mounting assembly is a valve lash adjustment assembly.
Furthermore, the upper end of the first push rod is hinged with a first push rod arm of the first rocker arm through a spherical hinge; the upper end of the second push rod is hinged with a second push rod arm of the second rocker arm through a spherical hinge.
Further, the camshaft is installed at a middle position in the height direction of the engine.
Further, the engine is a diesel engine, a gasoline engine, or a natural gas engine.
In the valve gear of the invention, the driving points of the two first valves and the two second valves are moved to one side of a cylinder cover of a cylinder of an engine in the form of two rocker arms, and then the opening and closing actions of the two first valves and the two second valves are controlled by a camshaft below one side of the cylinder cover. The driving points of the four valves are moved to one side of the cylinder cover of the engine cylinder, so that the four valves can be conveniently controlled by one cam shaft, and the cam shaft is arranged at the position below the cylinder cover, so that the distance between the cam shaft and the crankshaft can be shortened.
Compared with the prior art, the valve actuating mechanism has the advantages that:
1) the four valves in the rectangular symmetrical arrangement can be controlled by only arranging one camshaft in the valve actuating mechanism of the engine, so that the overall weight and the volume of the engine are reduced, and the weight of a vehicle where the engine is located is reduced, and the installation space of the engine is saved.
2) The camshaft is arranged below the cylinder cover of the engine cylinder, the camshaft is closer to the crankshaft, and a complex transmission mechanism is not needed to be arranged between the camshaft and the crankshaft, so that the transmission reliability between the camshaft and the crankshaft is improved, the occurrence of large transmission noise is avoided, and the installation and maintenance of the engine are facilitated.
Drawings
FIG. 1 is a schematic structural diagram of a valve train of a four-valve cylinder of an engine according to the present invention;
FIG. 2 is a top view of the valve train of the present invention;
FIG. 3 is a schematic diagram of a first rocker arm of the valve train of the present invention;
fig. 4 is a schematic structural diagram of a second rocker arm in the valve train of the present invention.
In the figure: 1-cylinder head, 2-first rocker arm, 201-first rotating shaft, 202-first valve arm, 203-first push rod arm, 3-first valve, 6-second rocker arm, 601-second rotating shaft, 602-second valve arm, 603-second push rod arm, 7-second valve, 8-valve mounting component, 9-rocker arm seat, 902-first shaft hole, 906-second shaft hole, 11-first push rod, 12-second push rod, 13-first tappet, 14-second tappet and 15-camshaft.
Detailed Description
The invention will be further described with reference to the following figures and specific examples:
referring to fig. 1 and 2, the present embodiment is a valve actuating mechanism of a four-valve cylinder of an engine, and the valve actuating mechanism includes two first valves 3 and two second valves 7 provided on a cylinder head 1 of the engine, and the two first valves 3 and the two second valves 7 are arranged in a rectangular shape symmetrical in pairs on the cylinder head 1, as indicated by arrows a in fig. 2. In the present embodiment, the first valve 3 is an intake valve, and the second valve 7 is an exhaust valve. However, in other embodiments according to the invention, the second valve 7 may be provided as an intake valve and the first valve 3 may be provided as an exhaust valve.
Referring to fig. 1 to 4, the valve train of the present embodiment further includes a camshaft 15, two rocker seats 9, a first rocker arm 2, a second rocker arm 6, a first pushrod 11, a second pushrod 12, a first lifter 13, and a second lifter 14.
Referring to fig. 1, the camshaft 15 is mounted on the engine below the cylinder head 1, specifically, at a position in the middle of the engine in the height direction.
Referring to fig. 1 and 2, the two rocker arm holders 9 are fixedly mounted on the cylinder head 1 and symmetrically arranged, and each rocker arm holder 9 is provided with a first shaft hole 902 and a second shaft hole 906. The specific construction of the rocker arm seat may be as the case may be, in this embodiment a combination of two rocker arm seats 9 is used, while in other embodiments a single rocker arm seat of unitary construction may be used.
Referring to fig. 1, 2 and 3, the first rocker arm 2 includes a first rotating shaft 201, two first valve arms 202 and a first push rod arm 203, the first valve arms 202 and the first push rod arm 203 are respectively and fixedly disposed on two sides of the first rotating shaft 201, and two ends of the first rotating shaft 201 are respectively mounted in first shaft holes 902 of two rocker arm holders 9.
Referring to fig. 1, 2 and 4, the second rocker arm 6 includes a second rotating shaft 601, two second valve arms 602 and second push rod arms 603, the second valve arms 602 and the second push rod arms 603 are respectively and fixedly disposed on two sides of the second rotating shaft 601, and two ends of the second rotating shaft 601 are respectively mounted in second shaft holes 906 of two rocker arm holders 9.
Referring to fig. 1 and 2, the first rotating shaft 201 of the first rocker arm 2 and the second rotating shaft 601 of the second rocker arm 6 are located on one side of the two second valves 7, that is, on one side of the two second valves 7 away from the two first valves 3, the first valve arm 202 of the first rocker arm 2 and the second valve arm 602 of the second rocker arm 6 both face one side of the valves, the two first valve arms 202 of the first rocker arm 2 are bent to wrap around the two second valves 7 and then are respectively mounted and connected with the two first valves 3, so as to avoid interference between the first valve arms 202 and the second valves 7, and the two second valve arms 602 of the second rocker arm 6 are respectively mounted and connected with the two second valves 7. More specifically, the valve train of the present embodiment further includes four valve mounting assemblies 8, the two first valve arms 202 of the first rocker arm 2 are mounted and connected with the two first valves 3 through the two valve mounting assemblies 8, and the two second valve arms 602 of the second rocker arm 6 are mounted and connected with the two second valves 7 through the other two valve mounting assemblies 8. The number and the structure of the first valve arm 202 of the first rocker arm 2 and the second valve arm 602 of the second rocker arm 6 may be determined according to the specific situation, and in other embodiments according to the present invention, one valve arm may be used on each rocker arm, and two valves may be simultaneously mounted and connected to one valve arm.
Referring to fig. 1, the upper end of the first push rod 11 is hinged to the first push rod arm 203 of the first rocker arm 2 through a spherical hinge, the lower end of the first push rod 11 abuts against the cam of the cam shaft 15 through the first tappet 13, the upper end of the second push rod 12 is hinged to the second push rod arm 603 of the second rocker arm 6 through a spherical hinge, and the lower end of the second push rod 12 abuts against the cam of the cam shaft 15 through the second tappet 14.
Preferably, the valve mounting assembly 8 is a valve clearance adjusting assembly, and the valve clearance adjusting assembly can adjust a clearance between a valve and a rocker arm so as to prevent the valve from being in a state of being opened all the time when the valve mechanism is heated and expanded.
In the valve gear of the present embodiment, the driving points of the two first valves 3 and the two second valves 7 are shifted to the side of the cylinder head 1 of the engine in the form of two rocker arms, and then the opening and closing operations of the two first valves 3 and the two second valves 7 are controlled by the camshaft 15 below the side of the cylinder head. The valve train of this embodiment has two advantages. On one hand, the two first valves 3 and the two second valves 7 which are in a rectangular symmetrical arrangement mode can be controlled to be opened and closed only by arranging one camshaft in the engine, so that the overall weight and the size of the engine are reduced, and the weight reduction of a vehicle where the engine is located and the saving and the utilization of the installation space of the engine are facilitated. On the other hand, the camshaft 15 is arranged below the cylinder cover 1 of the engine cylinder, the camshaft 15 is close to the crankshaft, and a complex transmission mechanism is not needed to be arranged between the camshaft 15 and the crankshaft, so that the transmission reliability between the camshaft and the crankshaft is improved, the generation of large transmission noise is avoided, and the installation and maintenance of the engine are facilitated.
In the present embodiment, the engine is a diesel engine, but in other embodiments, the engine is not limited to a diesel engine, and may be an internal combustion engine such as a gasoline engine or a natural gas engine.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A valve actuating mechanism of a four-valve cylinder of an engine comprises two first valves (3) and two second valves (7) which are arranged on a cylinder cover (1) of the engine cylinder, wherein the two first valves (3) and the two second valves (7) are arranged on the cylinder cover (1) in a pairwise symmetrical rectangular manner;
the method is characterized in that: the valve timing mechanism further comprises a camshaft (15), a rocker seat (9), a first rocker arm (2), a second rocker arm (6), a first push rod (11), a second push rod (12), a first tappet (13) and a second tappet (14);
the camshaft (15) is arranged on the engine and is positioned below the cylinder cover (1);
the rocker arm seat (9) is fixedly arranged on the cylinder cover (1), and the rocker arm seat (9) is provided with a first shaft hole (902) and a second shaft hole (906);
the first rocker arm (2) comprises a first rotating shaft (201), a first valve arm (202) and a first push rod arm (203), and the first valve arm (202) and the first push rod arm (203) are fixedly arranged on two sides of the first rotating shaft (201) respectively; the first rotating shaft (201) is arranged in a first shaft hole (902) of the rocker arm seat (9);
the second rocker arm (6) comprises a second rotating shaft (601), a second valve arm (602) and a second push rod arm (603), and the second valve arm (602) and the second push rod arm (603) are fixedly arranged on two sides of the second rotating shaft (601) respectively; the second rotating shaft (601) is arranged in a second shaft hole (906) of the rocker arm seat (9);
a first rotating shaft (201) of the first rocker arm (2) and a second rotating shaft (601) of the second rocker arm (6) are positioned on one side of the two second valves (7), a first valve arm (202) of the first rocker arm (2) bypasses the second valves (7) and is connected with the first valves (3) in an installing mode, and a second valve arm (602) of the second rocker arm (6) is connected with the second valves (7) in an installing mode;
the upper end of the first push rod (11) is hinged with a first push rod arm (203) of the first rocker arm (2), and the lower end of the first push rod (11) abuts against a cam of a cam shaft (15) through the first tappet (13); the upper end of the second push rod (12) is hinged with a second push rod arm (603) of the second rocker arm (6), and the lower end of the second push rod (12) abuts against a cam of a cam shaft (15) through the second tappet (14).
2. The valve train of the four-valve cylinder of the engine according to claim 1, characterized in that: the first valve (3) is an intake valve, and the second valve (7) is an exhaust valve.
3. The valve train of the four-valve cylinder of the engine according to claim 1, characterized in that: the first valve (3) is an exhaust valve, and the second valve (7) is an intake valve.
4. A valve gear of a four-valve cylinder of an engine according to any one of claims 1 to 3, characterized in that: the valve train further comprises four valve mounting assemblies (8), a first valve arm (202) of the first rocker arm (2) is connected with the two first valves (3) in an installing mode through the two valve mounting assemblies (8), and a second valve arm (602) of the second rocker arm (6) is connected with the two second valves (7) in an installing mode through the other two valve mounting assemblies (8).
5. The valve train of the four-valve cylinder of the engine according to claim 4, characterized in that: the valve mounting assembly (8) is a valve clearance adjusting assembly.
6. A valve gear of a four-valve cylinder of an engine according to any one of claims 1 to 3, characterized in that: the upper end of the first push rod (11) is hinged with a first push rod arm (203) of the first rocker arm (2) through a spherical hinge; the upper end of the second push rod (12) is hinged with a second push rod arm (603) of the second rocker arm (6) through a spherical hinge.
7. A valve gear of a four-valve cylinder of an engine according to any one of claims 1 to 3, characterized in that: the camshaft (15) is installed at the middle position in the height direction of the engine.
8. A valve gear of a four-valve cylinder of an engine according to any one of claims 1 to 3, characterized in that: the engine is a diesel engine, a gasoline engine or a natural gas engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110521940.5A CN113236394A (en) | 2021-05-13 | 2021-05-13 | Valve mechanism of engine four-valve cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110521940.5A CN113236394A (en) | 2021-05-13 | 2021-05-13 | Valve mechanism of engine four-valve cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113236394A true CN113236394A (en) | 2021-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110521940.5A Pending CN113236394A (en) | 2021-05-13 | 2021-05-13 | Valve mechanism of engine four-valve cylinder |
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| Country | Link |
|---|---|
| CN (1) | CN113236394A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2646877A1 (en) * | 1989-05-10 | 1990-11-16 | Noel Armand | Cylinder head with movable end for 4-stroke engines |
| US5007387A (en) * | 1990-01-29 | 1991-04-16 | Masachika Arao | Four valve per cylinder engine head |
| US6505589B1 (en) * | 2002-02-01 | 2003-01-14 | General Motors Corporation | Single cam three-valve engine overhead valve train |
| US20050061274A1 (en) * | 2003-09-22 | 2005-03-24 | Yasuyuki Nakahira | Valve drive system for four-stroke engine |
| CN2856429Y (en) * | 2005-10-19 | 2007-01-10 | 陈恳 | General multiple air gates admission gear of small I.C.engine |
-
2021
- 2021-05-13 CN CN202110521940.5A patent/CN113236394A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2646877A1 (en) * | 1989-05-10 | 1990-11-16 | Noel Armand | Cylinder head with movable end for 4-stroke engines |
| US5007387A (en) * | 1990-01-29 | 1991-04-16 | Masachika Arao | Four valve per cylinder engine head |
| US6505589B1 (en) * | 2002-02-01 | 2003-01-14 | General Motors Corporation | Single cam three-valve engine overhead valve train |
| US20050061274A1 (en) * | 2003-09-22 | 2005-03-24 | Yasuyuki Nakahira | Valve drive system for four-stroke engine |
| CN2856429Y (en) * | 2005-10-19 | 2007-01-10 | 陈恳 | General multiple air gates admission gear of small I.C.engine |
Non-Patent Citations (2)
| Title |
|---|
| 李波,等: "《汽车发动机构造与检修》", 31 January 2019, 广州：华南理工大学出版社 * |
| 赫扎特，等, 北京：兵器工业出版社 * |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 2636 Jungong Road, Yangpu District, Shanghai 200438 Applicant after: Shanghai New Power Automotive Technology Co.,Ltd. Address before: 2636 Jungong Road, Yangpu District, Shanghai 200438 Applicant before: SHANGHAI DIESEL ENGINE Co.,Ltd. |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210810 |
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| RJ01 | Rejection of invention patent application after publication |