GB2536136A - Cylinder cover of four-valve diesel engine - Google Patents

Cylinder cover of four-valve diesel engine Download PDF

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Publication number
GB2536136A
GB2536136A GB1603850.7A GB201603850A GB2536136A GB 2536136 A GB2536136 A GB 2536136A GB 201603850 A GB201603850 A GB 201603850A GB 2536136 A GB2536136 A GB 2536136A
Authority
GB
United Kingdom
Prior art keywords
valve
guide rod
cylinder head
valve bridge
bridge guide
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.)
Granted
Application number
GB1603850.7A
Other versions
GB201603850D0 (en
GB2536136B (en
Inventor
Shen Jie
Li Wei
Huang Yongzhong
Wang Lile
Cai Xiaoxia
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangxi Yuchai Machinery Co Ltd
Original Assignee
Guangxi Yuchai Machinery Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guangxi Yuchai Machinery Co Ltd filed Critical Guangxi Yuchai Machinery Co Ltd
Publication of GB201603850D0 publication Critical patent/GB201603850D0/en
Publication of GB2536136A publication Critical patent/GB2536136A/en
Application granted granted Critical
Publication of GB2536136B publication Critical patent/GB2536136B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
    • 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
    • F01L1/181—Centre pivot rocking arms
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
    • F02F1/4214—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more 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
    • F01L1/20—Adjusting or compensating clearance
    • 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
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • 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
    • F01L2810/00—Arrangements solving specific problems in relation with valve gears
    • F01L2810/01—Cooling
    • 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
    • F01L2810/00—Arrangements solving specific problems in relation with valve gears
    • F01L2810/02—Lubrication

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

A cylinder cover of a four-valve diesel engine comprises a cylinder cover body (1), a rocker arm shaft mounting hole (11), and a valve bridge guide rod mounting hole (12). The cylinder cover body (1) is of a four-valve cylinder cover structure. The rocker arm shaft mounting hole (11) is used for mounting a rocker arm shaft. The rocker arm shaft is used for mounting an air exhaust valve rocker arm (141) and an air inlet valve rocker arm (142). The valve bridge guide rod mounting hole (12) is used for mounting a valve bridge guide rod (121). A valve bridge (122) is inserted into the upper end of the valve bridge guide rod (121). In the cylinder cover of a four-valve diesel engine, the rocker arm shaft mounting hole (11) and the valve bridge guide rod mounting hole (12) are integrated in the cylinder cover body (1), so that it can ensured that the rocker arm shaft is conveniently and quickly mounted, and an air inlet valve rocker arm assembly and an exhaust valve rocker arm assembly are reliable in operation; the number of auxiliary parts are reduced, and the disassembly and assembly are easy.

Description

Fourwalve Cylinder Head Of Diesel Engines
Technical field
The present invention relates to the field of engines, in particular to a four-valve cylinder head of a diesel engine Desuu lion of the R ted Art As is well known, the cylinder head is an important part of the diesel engine, and the installation and use of many parts in the valve mechanism must depend on the cylinder head. In the prior art, the rocker shaft seat is independently processed. During manufacture processing, some rocker shafts are manufactured on the rocker shaft seats, sonic rocker shaft seats are reserved with rocker shaft mounting holes, and some are bolted at the cylinder beads. The inlet valve rocker arm assembly and the exhaust valve rocker arm assembly in the valve mechanism am assembled onto the rocker shaft seat of the cylinder head via the rocker shaft. The rocker shaft seat supplies lubrication and cooling function to the rotary parts of the inlet valve rocker arm assembly and the exhaust valve rocker arm assembly through corresponding lubricating oil channels.
At present, the cylinder heads of the diesel engines usually have no rocker shaft seat, and the rocker shaft seats need processing independently and are assembled onto the cylinder head through bolts. The disadvantages of this structure are that many parts for auxiliary installation and positioning are needed, and has loose structure and low positioning accuracy, which results in poor maintenance and limited freedom of installation space.
of e Present Inve The object of the present invention is to overcome the defects in the prior art by providing a four-valve cylinder head of a diesel engine which integrates the rocker I. shaft seat, has a simple and compact structure, high loc.ation accuracy, which is convenient to dissemble and assemble and facilitates maintenance.
To this end., the present invention provides a four-valve cylinder bead of a diesel engine which comprises: a cylinder head main body which is a four-valve cylinder head structure: a rocker shaft mounting hole for installing a rocker shaft, and. the rocker shaft being used to install an. outlet-valve rocker:arm and an inlet valve rocker arm thereon; and a mounting hole of a valve bridge guide rod for installing a valve bridge guid.e rod, in which a valve bridge is inserted on the upper:end. of the valve bridge guide rod.
According to a 'preferred enthodiment of the present invention, I op er cylinder head Hmain body is a: polygonal reinforcement flame structure having a reinforcing dh oath.
According to a preferred embodiment of the present "Wen there are two mounting holes of the valve bridge guide rod, and Iwo valve bridge guide rods are mounted on respective mourning hole of the valve bridge guide rod.
According to a preferred embodiment of the present invention, the valve bridge guide rod and the mounting hole of the valve bridge guide rod are assembled in an interference fit manner, According to a preferred embodiment of the present invention, the valve bridge and the valve bridge guide rod are assembled in a clearance fit manner.
Compared with the conventional cylinder bead, the four-valve cylinder head according to the present invention has the following beneficial effects: the rocker i mounting holes for installing the rocker shafts and the mounting holes of the valve bridge guide rod for installing the valve bridge guide rods are integrated on the cylinder head main body of a four-valve cylinder head of the diesel engine. On one hand, the integral structural design ensures convenient and quick installation of the rocker shafts, which leads to compact structure, accurate positioning and more reliable operation of the inlet valve rocker arm assembly and exhaust valve rocker positioning and parts f assembly. The parts for auxiliary installation and ling are greatly reduced, thus lowering the cost. On the other hand, since the cylinder head main body is integrated with mounting holes of the valve bridge guide rod and the cylinder head is provided with the valve bridge guide rods, the valve bridges move up and down more accurately during operation and are not easy to rotate and fly off, and the valves are more smoothly and accurately opened and closed.
The present invention will be further described g,h the following embodiments and the accompanying drawings. Des a
The invention will now be described in a no fluting way with referenceto the drawing in which like parts have like reference symbols, ana n which: Figure 1 is a plan view of a four-alve cylinder head of the diesel engine of the present invent ion" Figure 2 is a sectional view of Figure tin the A-A direction Figure 3 is a sectional view of Figure 1 in the B-B direction.
Figure 4 is a sectional view of Figure 1 in C-C direction,
Description of the numbers in the
1-cylinder head main body 11-rocker shaft mounting hole 12-mounting hole of valve bridge guide rod 121-valve bridge guide rod, 122-valve bridge, 123-inlet valve bearing face 124-exhaust valve hearing face 13-reinforcing rib plate 14-rocker shaft 141-outlet valve rocker arm 142-inlet valve rocker arm 143-valve bridge pressing block.
pesscipti, 1-Present Invention The preferred embodiment of the present invention is described in reference to the attached drawings. However, it should be understood that the protective scope of the present invention is not limited by the embodiment.
in the present invention, the rocker arm mounting holes for installing the ock shafts and the mounting holes of the valve bridge guide rod for installing the valve bridge guide rods are integrated on the cylinder head main body of a four-valve cylinder head of the diesel engine. On one hand, the integral structural design ensures convenient and quick installation of the rocker shafts, which leads to compact structure, accurate positioning and more reliable operation of the:inlet valve rocker arm assembly and exhaust valve rocker arm assembly. The parts for auxiliary installation and positioning and parts for sealing are greatly reduced, thus lowering the cost. On the other hand, since the cylinder head main body is integrated with mounting holes of the valve bridge guide rod and the cylinder head is provided with the valve bridge guide rods, the valve bridges move up and down it accurately during operation and are not easy to rotate and fly off, and the valves are more smoothly and accurately opened and closed.
As shown in Figures 1-4, the Fotz-valve diesel engine according to a preferred embodiment of the present invention comprises a cylinder head main body I, rocker shaft mounting holes 11 and mounting holes of a valve bridge guide rod 12 formed on the cylinder head main body 1. The rocker shaft mounting hole 11 is used to install a rocker shaft, An inlet valve rocker arm and an exhaust valve rocker re installed on the rocker shaft, so the rocker shaft is quick and convenient to all, thus has compact structure and accurate positioning. Meanwhile, the inlet valve rocker arm assembly and the exhaust valve rocker arm assembly work more reliably. The parts for auxiliary installation and positioning and parts for sealing are greatly reduced, thus lowering the cost. The mounting holes 12 of a valve bridge guide rod are used to install the valve bridge guide rods. Therefore, during operation, the valve bridges move up and down more accurately during operation and are not easy to rotate and fly off, and the valves are more smoothly and accurately opened and closed.
Preferably. the cylinder head main body 1 is a four-valve cylinder head structure, namely including two inlet valves and two exhaust valves, The top part of the cylinder head main body I is a polygonal reinforcement frame structure that has a reinforcing rib plate 13. The polygonal reinforcement frame is used to improve the overall rigidity of the cylinder head. Moreover, after the cylinder head*bolts are fastened, the mounting face between the cylinder head and the cylinder block is uniformly pressed and more reliably sealed.
As shown in Figures 1 and 3, each rocker shaft mounting hole 11 is equipped with a rocker shaft 14: each rocker shaft 14 is also equipped with rocker arm 141 and an inlet valve rocker arm 142. Both the exhaust valve rocker arms 141 and the inlet valve rocker arms 142 are provided with the valve bridge pressing blocks 143 therein. During installation, an inlet valve rocker bearing is transversely inserted into an inlet valve bearing hole first, and an inlet valve rocker shaft is inserted into an exhaust valve bearing hole; then, sealing grooves at the rocker shaft end and the outer rocker shalt end of the rocker shaft 14 arc respectively equipped with 0-shaped sealing rings; the inner rocker shaft end penetrates through the rocker shaft 11 penetrating through the rocker shaft mounting hole 11, following by a washer, the inlet valve rocker bearing on the inlet valve rocker arm, a washer, the exhaust valve rocker shaft bearing on the exhaust e rocker arm and a washer in turn; and finally, the outer rocker shaft end is ated into the rocker shaft mounting hole 3. The 0-shaped waling rings on the inner rocker shaft end and the outer rocker shaft end conduct sealing functions: the washers can prevent g between the contact surfaces and effectively of assembling.
As shown in Figure 1 and Figure 4, there are two mounting holes 12 of bridge guide rod and a valve bridge guide rod 121 is mounted on the espective mounting hole 12 in an interference fit. A valve bridge 122 is inserted on the upper part of each valve bridge guide rod 121 in a clearance fit. During operation of the engine, the valve bridge 122 can move vertically along the axis direction of the valve bridge guide rod 121. In addition, the valve bridge 122 includes an inlet valve bearing face 123 for pushing the inlet valve and an exhaust valve bearing 124 for pushing the exhaust valve. The inlet valve bearing face 123 is used to pull the inlet valve to open when the engine is working, and the exhaust valve bearing face 124 is used to pull the exhaust valve to open when the engine is working. The valve bridge having processed holes is installed with the valve bridge guide rods. The valve bridges can move along the axis direction of the v bridge guide rods when driven by the inlet valve rocker ann and the exhaust valve rocker arm, thus improving the structural stability of the valve bridges, and avoiding that when the engine urns at a high speed, the valve rocker arms fly off from the valve bridges and do not move synchronously due to the inertia effect.
rwise, after the valve rocker arms acting force on the valve bridges deviate, the valve bridges will turn over or bounce to fall oil or get stuck, thus affecting t normal working of the engine.
conclusion, in the four-vatvc cylinder head according to the present invention, the rocker arm mounting holes for installing the rocker shafts and the mounting holes of the valve bridge guide rod for installing the valve bridge guide rods are integrated on the cylinder head main body of a four-valve cylinder head of the diesel engine. On one hand, the integral stnictural design ensures convenient and quick installation of the rocker shafts, which leads to compact structure, accurate positioning and more reliable operation of the inlet valve rocker arm assembly and exhaust valve rocker arm assembly. The parts for auxiliary installation and positioning and parts for sealing are greatly reduced, thus lowering the cost. On the other hand, since the cylinder head main body is integrated with ting holes of the valve bridge guide rod and the cylinder head is provided with alve bridge guide rods, the valve bridges move up and down more accurately during operation and are not easy to rotate and fly off, and the valves are more smoothly and accurately opened and closed.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description, They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teachings. The exemplary embodiments were chosen and described in order to explain certain principles of the invention. It is intended that the scope of the invention be defined by the Claims appended hereto and their equivalents.

Claims (5)

  1. WHAT IS CLAIMED I& 1. A four-valve cylinder head of a diesel engine, which comprises: a cylinder head main body which is a four-valve cylinder head structure; a rocker shall mounting hole for installing a rocker shaft, the rocker shaft being used to install an outlet-valve rocker arm and an inlet valve rocker aim thereon; and a mounting hole of a valve bridge guide rod for installing a valve bridge guide rod, wherein a valve bridge is inserted on the upper end of the valve bridge guide rod.
  2. 2. The four-valve cylinder head as claimed in claim I, wherein the top of the cylinder head main body is a polygonal reinforcement frame structure having a reinforcing rib plate.
  3. 3. The four-s,ralve cylinder head as claimed in claim 1, wherein two mourning holes of the valve bridge guide rod are provided, and two valve bridge guide rods are mounted on respective mounting hole of the valve bridge guide rod.
  4. 4. The four-valve cylinder head as claimed in anyone of claims 1-3, wherein the valve bridge guide rod and the mounting hole of the valve bridge guide rod are assembled in an interference fit marmer.
  5. 5. The four-valve cylinder head as claimed in claim 4, wherein the valve bridge and the valve bridge guide rod are assembled in a clearance fit manner.
GB1603850.7A 2013-11-25 2014-08-01 Cylinder cover of four-valve diesel engine Active GB2536136B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201310606161.0A CN103603741B (en) 2013-11-25 2013-11-25 Cylinder cover of four-valve diesel engine
PCT/CN2014/083536 WO2015074442A1 (en) 2013-11-25 2014-08-01 Cylinder cover of four-valve diesel engine

Publications (3)

Publication Number Publication Date
GB201603850D0 GB201603850D0 (en) 2016-04-20
GB2536136A true GB2536136A (en) 2016-09-07
GB2536136B GB2536136B (en) 2020-04-29

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ID=50121992

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GB1603850.7A Active GB2536136B (en) 2013-11-25 2014-08-01 Cylinder cover of four-valve diesel engine

Country Status (5)

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CN (1) CN103603741B (en)
AU (1) AU2014101535A4 (en)
DE (1) DE112014005363T5 (en)
GB (1) GB2536136B (en)
WO (1) WO2015074442A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103603741B (en) * 2013-11-25 2015-07-15 广西玉柴机器股份有限公司 Cylinder cover of four-valve diesel engine
CN105257423B (en) * 2015-11-13 2017-08-25 广西玉柴机器股份有限公司 Cylinder head
CN108868938A (en) * 2018-09-06 2018-11-23 广西玉柴机器股份有限公司 It is oriented to the increased air valve bridge of length of fit
CN109322721A (en) * 2018-12-10 2019-02-12 广西玉柴机器股份有限公司 High speed engine continuous variable air valve lift range mechanism peculiar to vessel
CN110332029A (en) * 2019-07-02 2019-10-15 广西玉柴机器股份有限公司 A kind of air valve bridge guide rod with exhaust duct
CN110359975A (en) * 2019-07-02 2019-10-22 广西玉柴机器股份有限公司 A kind of air valve bridge guide rod of hollow type

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5570664A (en) * 1994-09-02 1996-11-05 Nissan Motor Co., Ltd. Engine valve drive device
JPH09291804A (en) * 1996-04-26 1997-11-11 Kubota Corp Multi-valve engine
CN2592879Y (en) * 2002-08-10 2003-12-17 浙江瑞明汽车部件有限公司 Automobile engine cylinder head
CN102080584A (en) * 2010-12-29 2011-06-01 潍柴动力扬州柴油机有限责任公司 Engine and air valve driving mechanism thereof
CN102797583A (en) * 2011-05-25 2012-11-28 广西玉柴机器股份有限公司 Cylinder cover for diesel engine
CN103603741A (en) * 2013-11-25 2014-02-26 广西玉柴机器股份有限公司 Cylinder cover of four-valve diesel engine
CN203532082U (en) * 2013-11-25 2014-04-09 广西玉柴机器股份有限公司 Cylinder head of four-valve diesel engine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5570664A (en) * 1994-09-02 1996-11-05 Nissan Motor Co., Ltd. Engine valve drive device
JPH09291804A (en) * 1996-04-26 1997-11-11 Kubota Corp Multi-valve engine
CN2592879Y (en) * 2002-08-10 2003-12-17 浙江瑞明汽车部件有限公司 Automobile engine cylinder head
CN102080584A (en) * 2010-12-29 2011-06-01 潍柴动力扬州柴油机有限责任公司 Engine and air valve driving mechanism thereof
CN102797583A (en) * 2011-05-25 2012-11-28 广西玉柴机器股份有限公司 Cylinder cover for diesel engine
CN103603741A (en) * 2013-11-25 2014-02-26 广西玉柴机器股份有限公司 Cylinder cover of four-valve diesel engine
CN203532082U (en) * 2013-11-25 2014-04-09 广西玉柴机器股份有限公司 Cylinder head of four-valve diesel engine

Also Published As

Publication number Publication date
CN103603741B (en) 2015-07-15
DE112014005363T5 (en) 2016-08-04
GB201603850D0 (en) 2016-04-20
AU2014101535A4 (en) 2015-02-12
GB2536136B (en) 2020-04-29
WO2015074442A1 (en) 2015-05-28
CN103603741A (en) 2014-02-26

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