US20110180033A1 - Chain case structure of engine - Google Patents

Chain case structure of engine Download PDF

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Publication number
US20110180033A1
US20110180033A1 US13/009,444 US201113009444A US2011180033A1 US 20110180033 A1 US20110180033 A1 US 20110180033A1 US 201113009444 A US201113009444 A US 201113009444A US 2011180033 A1 US2011180033 A1 US 2011180033A1
Authority
US
United States
Prior art keywords
chain
oil
engine
guide portion
chain 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.)
Abandoned
Application number
US13/009,444
Other languages
English (en)
Inventor
Katsuni HOSHITO
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.)
Suzuki Motor Corp
Original Assignee
Suzuki Motor Corp
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 Suzuki Motor Corp filed Critical Suzuki Motor Corp
Assigned to SUZUKI MOTOR CORPORATION reassignment SUZUKI MOTOR CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HOSHITO, KATSUNI
Publication of US20110180033A1 publication Critical patent/US20110180033A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/02—Pressure lubrication using lubricating pumps
    • 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
    • F01L1/02—Valve drive
    • F01L1/022—Chain drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/02—Pressure lubrication using lubricating pumps
    • F01M2001/0284—Pressure lubrication using lubricating pumps mounting of the pump

Definitions

  • the present invention relates to a chain case structure of an engine particularly capable of preventing a timing chain of the engine from falling off or being disengaged during assembling of the timing chain.
  • one of conventional techniques is a method of providing a fall-off (disengagement) preventing rib for holding a timing chain in a lower portion of a crank sprocket.
  • a fall-off preventing rib having a certain length or more is disposed on a back surface of a wrapping portion of a crank sprocket so as to cover a timing chain in a width direction only for the purpose of achieving a fall-off prevention function, which causes an increase in weight.
  • the rib takes an arcuate shape having a large area with less rigidity, and because of this reason, the rib generates radiation sound, that is, acoustic radiation efficiency becomes adversely high, constituting engine noise generation source.
  • Patent Document 1 Japanese Utility Model Laid-Open Publication No. 56-175529
  • a front cover which is made of a material with large damping
  • a reinforcing member is provided in an area counteracting an external force to thereby reduce noise.
  • a lubricating device for an engine is provided with a projecting portion (as a chain guide) at a portion on a lower side of a crank sprocket for preventing a timing chain from falling off or being disengaged.
  • the projecting portion as a chain guide is formed in an oil pump case.
  • the projecting portion is provided in a cantilevered manner projecting from a wall surface of the oil pump case in the chain chamber, which may provide insufficient rigidity of the protrusion portion, increase acoustic radiation efficiency, and adversely affect engine noise or vehicle vibration.
  • an oil suction passage and this projecting portion are provided in different positions, and the location of these portions provides a complicated structure and configuration of the oil pump case, and hence, an oil pump, thus being also disadvantageous.
  • the present invention was conceived in consideration of the circumstances of the conventional art mentioned above, and an object of the present invention is to provide a chain case structure of an engine having a simplified structure of an oil pump case with considerable rigidity being maintained.
  • a chain case structure of an engine having a cylinder block, a crankshaft supported by the cylinder block, a crank sprocket mounted to one end of the crankshaft, a crank gear mounted to another end thereof, and a timing chain- wound around the crank sprocket and the crank gear, the chain case structure being mounted to an axial one end of the engine crankshaft,
  • the chain case structure comprising:
  • the oil suction passage portion may be configured to have a width substantially equal to a width of the chain guide portion when the oil pump case is seen from the crankshaft direction of the engine.
  • the oil pump case may further include a pressure regulating valve, a housing accommodating the pressure regulating valve and a fastening portion fastened to the chain case and disposed between the pressure regulating valve housing and the chain guide portion so that the chain guide portion is connected to the pressure regulating valve housing through the fastening portion.
  • the oil strainer mounting portion and the pressure regulating valve housing are connected by a reinforcing rib that is connected to the chain guide portion through the fastening portion.
  • the chain case structure of an engine according to the preferred aspect of the present invention mentioned above can simplify a structure of the oil pump case arranged in the chain case and also enhance the rigidity of the chain guide portion protruding from an inner wall of the oil pump case toward the engine.
  • FIG. 1 is a front view of an engine provided with an chain case according to one embodiment
  • FIG. 2 is a view of a chain case side seen from an interior of the engine taken along an arrowed line II-II in FIG. 1 ;
  • FIG. 3 is an enlarged view of a lower portion of the chain case in FIG. 2 ;
  • FIG. 4 is a perspective view of the lower portion of the chain case in FIG. 2 ;
  • FIG. 5 is a front view of an oil pump case provided for the engine shown in FIG. 4 , for example;
  • FIG. 6 is a back view of the oil pump case shown in FIG. 5 ;
  • FIG. 7 is a view showing an oil lubricating path of the engine according to the embodiment.
  • the present invention provides an embodiment of an engine chain case having an improved structure for achieving improvement of a rigidity of a chain guide and preventing fall-off (disengagement) of a timing chain.
  • FIGS. 1 to 7 show a preferred embodiment of the present invention. It is further to be noted that terms “upper”, “lower”, “right”, “left” and like terms indicating direction or like are used herein by wordings written on the drawings or in an illustrated attitude.
  • reference numeral 1 denotes a horizontal engine mounted in a vehicle.
  • the engine 1 includes a cylinder block 2 and a cylinder head 3 which is covered by a cylinder head cover 4 , is disposed at a lower portion of the engine 1 .
  • the engine 1 is provided with a turbocharger 6 at a right side portion thereof as shown in FIG. 1 , an auxiliary equipment, such as air conditioning compressor, 7 and an exhaust manifold cover 8 both in a front side portion thereof, and an oil filter 9 at a lower front portion thereof.
  • a turbocharger 6 at a right side portion thereof as shown in FIG. 1
  • an auxiliary equipment such as air conditioning compressor, 7 and an exhaust manifold cover 8 both in a front side portion thereof
  • an oil filter 9 at a lower front portion thereof.
  • crankshaft 10 is journaled on the cylinder block 2 .
  • a crank sprocket 11 and a crank gear 12 are mounted to the crankshaft 10 at a front end and a rear end, respectively.
  • a front camshaft 13 and a rear camshaft 14 are journaled in parallel on the cylinder head 3 .
  • a front cam sprocket 15 is mounted to the front camshaft 13 .
  • a rear cam sprocket 16 is mounted to the rear camshaft 14 .
  • a timing chain 17 is wound around the crank sprocket 11 , the front cam sprocket 15 and the rear cam sprocket 16 .
  • a tension side timing chain holder 18 and a loose side timing chain holder 19 are mounted to the cylinder block 2 on a front side and a rear side, respectively.
  • a chain case mounting surface 20 is formed to the front portion formed as one end portion in the axial direction of a crankshaft.
  • a chain case 21 is further disposed to the chain case mounting surface 20 so as to cover the timing chain 17 .
  • the chain case 21 is mounted to the axial one end portion of the crankshaft of the engine 1 .
  • an oil pump 22 driven by the crankshaft 10 of the engine 1 is mounted in the chain case 21 , and the oil pump 22 includes an oil pump case 26 , which houses an inner rotor 23 secured to the crankshaft 10 and an outer rotor 25 that rotates around the inner rotor 23 and expands/contracts a pump chamber 24 .
  • an oil suction passage portion 29 forming an oil suction passage, which provides communication between the pump chamber 24 and an inner space of an oil strainer mounting portion 28 for mounting an oil strainer 27 disposed in the oil pan 5 ; a chain guide portion 30 protruding toward the front portion forming one end of the engine 1 and extending along an outer periphery of the timing chain 17 wound around the crank sprocket 11 ; and a shaft hole 26 c.
  • the oil strainer mounting portion 28 is placed below the chain guide portion 30 .
  • the oil suction passage portion 29 is expanded from a wall surface of the oil pump case 26 toward the engine 1 so as to extend toward the chain guide portion 30 .
  • the oil strainer mounting portion 28 and the chain guide portion 30 are connected by means of the oil suction passage portion 29 .
  • the chain guide portion 30 is integrally connected to the oil suction passage portion 29 , thus constituting a wall of the oil suction passage portion 29 .
  • the chain guide portion 30 and the oil suction passage portion 29 can be communalized in the oil pump case 26 , thereby simplifying a structure of the oil pump case 26 .
  • the chain guide portion 30 and the oil strainer mounting portion 28 are connected via the oil suction passage portion 29 expanded toward the engine 1 , thereby improving the rigidity of the chain guide portion 30 and preventing engine noise or vibration from causing.
  • the rigidity of the chain guide portion 30 is enhanced, thereby eliminating the provision or location of a reinforcing rib in the chain guide portion 30 and reducing sizes of the chain guide portion 30 and the oil pump case 26 themselves.
  • the oil suction passage portion 29 overhanging in the width direction of the timing chain 17 is disposed in a position at a certain clearance from an outer edge of a running path of the timing chain 17 , thereby preventing tooth skipping under the loosed state of the timing chain 17 .
  • this oil suction passage portion 29 can be moved to a position close to the crank sprocket 11 , this oil suction passage portion can be used as a holding member of the timing chain 17 , thus minimizing the increasing in weight while allowing addition of a chain holding function.
  • the oil-suction passage portion 29 has a certain or more sectional area than that in conventional structure, the passage portion can be naturally made larger section modulus than the conventional fall-off prevention rib, thus providing a relatively high rigidity and being effective in radiation noise suppression.
  • the construction is made such that, in an arrangement, when the oil pump case 26 is seen from the crankshaft direction of the engine 1 , the oil suction passage portion 29 has a width W, which is made equal to a width W of the chain guide portion 30 .
  • the entire lower portion of the chain guide portion 30 having an arcuate rib shape and the oil suction passage portion 29 can be connected, thereby enhancing rigidity of the chain guide portion 30 .
  • the oil strainer mounting portion 28 is formed to be wider than the oil suction passage portion 29 and the chain guide portion 30 , the location of the oil strainer mounting portion 28 can prevent or suppress the oil suction passage portion 29 and the chain guide portion 30 from being deformed.
  • the oil pump case 26 is provided with a pressure regulating valve housing portion 32 vertically arranged so as to house a pressure regulating valve 31 , and a plurality of fastening portions 33 to be fastened to the chain case 21 .
  • One of the fastening portions 33 is disposed between the pressure regulating valve housing portion 32 and the chain guide portion 30 , and accordingly, the chain guide portion 30 is connected to the pressure regulating valve housing portion 32 through the fastening portion 33 .
  • the rigidity of the chain guide portion can be enhanced.
  • the oil strainer mounting portion 28 and the pressure regulating valve housing portion 32 are connected by a slanting reinforcing rib 34 , which is connected to the chain guide portion 30 through a fastening portion 33 .
  • the rigidity of the oil strainer mounting portion 28 can provide further improved rigidity, thus being advantageous.
  • the reinforcing rib 34 is connected to the fastening portion 33 , and the reinforcing rib 34 and the chain guide portion 30 are connected via the fastening portion 33 , it is possible to connect the chain guide portion 30 to the pressure regulating valve housing portion 32 and to the oil strainer mounting portion 28 through the reinforcing rib 34 and the fastening portion 33 , thereby further enhancing the rigidity of the chain guide portion 30 .
  • the oil discharged from the pump chamber 24 in the oil pump 22 passes from the pressure regulating valve 31 through the oil filter 9 and is then supplied from an oil supply passage portion 35 to the respective portions in the engine 1 to which it is required to supply the oil.
  • the chain guide portion is provided integrally with the oil pump case, and the oil suction passage portion expanded toward the engine is connected to the lower portion of the chain guide portion to thereby connect, to each other, the chain guide portion, the oil suction passage portion, and the oil strainer mounting portion, thereby enhancing the rigidity of the chain guide portion.
  • the chain case structure of the engine according to the present invention may be applied to various vehicles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
US13/009,444 2010-01-22 2011-01-19 Chain case structure of engine Abandoned US20110180033A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010011675A JP5574270B2 (ja) 2010-01-22 2010-01-22 エンジンのチェーンケース構造
JP011675/2010 2010-01-22

Publications (1)

Publication Number Publication Date
US20110180033A1 true US20110180033A1 (en) 2011-07-28

Family

ID=44294927

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/009,444 Abandoned US20110180033A1 (en) 2010-01-22 2011-01-19 Chain case structure of engine

Country Status (4)

Country Link
US (1) US20110180033A1 (de)
JP (1) JP5574270B2 (de)
CN (1) CN102135022B (de)
DE (2) DE102011003003B4 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170254409A1 (en) * 2016-03-07 2017-09-07 Toyota Jidosha Kabushiki Kaisha Case for endless transmission member
US20180010492A1 (en) * 2016-07-08 2018-01-11 Toyota Jidosha Kabushiki Kaisha Lubricant supply apparatus for chain in internal combustion engine

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102434308A (zh) * 2011-11-17 2012-05-02 东风朝阳柴油机有限责任公司 高度集成链轮室系统
JP6451767B2 (ja) * 2017-03-29 2019-01-16 マツダ株式会社 エンジンのシリンダブロック構造
CN112303469B (zh) * 2020-11-20 2022-03-11 湖南机油泵股份有限公司 一种可调节出油口位置的机油泵
CN114458410A (zh) * 2022-01-04 2022-05-10 江苏常发农业装备股份有限公司 一种发动机

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6260533B1 (en) * 1998-04-30 2001-07-17 Suzuki Motor Corporation Oil passageway structure for internal combustion engine
US6308679B1 (en) * 1999-02-22 2001-10-30 Honda Giken Kogyo Kabushiki Kaisha Separator structure of chain case

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JPS56175529U (de) * 1980-05-28 1981-12-24
JPS6269036U (de) * 1985-10-21 1987-04-30
JP2594047B2 (ja) * 1987-01-14 1997-03-26 三洋電機株式会社 コードリール付き移動作業車
JPH0533688Y2 (de) * 1987-02-13 1993-08-26
JPH087048Y2 (ja) * 1988-02-22 1996-02-28 日産自動車株式会社 内燃機関の潤滑機構
JPH0771268A (ja) * 1993-09-01 1995-03-14 Nissan Motor Co Ltd エンジンのチェーンカバー構造
JPH07197801A (ja) * 1993-12-28 1995-08-01 Suzuki Motor Corp エンジンの潤滑油ガイド
DE19647299C1 (de) * 1996-11-15 1998-04-09 Daimler Benz Ag Steuergehäuse für eine Brennkraftmaschine
JP3856070B2 (ja) * 1998-12-29 2006-12-13 スズキ株式会社 内燃機関のオイル通路構造
DE10159087C2 (de) * 2001-12-01 2003-11-13 Porsche Ag Brennkraftmaschine
JP4262546B2 (ja) * 2003-07-10 2009-05-13 本田技研工業株式会社 エンジンにおけるチェーンの潤滑構造
JP2005042606A (ja) * 2003-07-28 2005-02-17 Mitsubishi Motors Corp エンジンのオイル供給装置
DE102004062526B4 (de) * 2003-12-26 2015-12-31 Mitsubishi Jidosha Kogyo K.K. Kettenkastenkonstruktion mit integrierter Wasserpumpe
JP4137857B2 (ja) * 2004-08-27 2008-08-20 愛知機械工業株式会社 内燃機関のオイル通路構造
CN201087731Y (zh) * 2007-07-21 2008-07-16 奇瑞汽车有限公司 汽车发动机转子式机油泵

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6260533B1 (en) * 1998-04-30 2001-07-17 Suzuki Motor Corporation Oil passageway structure for internal combustion engine
US6308679B1 (en) * 1999-02-22 2001-10-30 Honda Giken Kogyo Kabushiki Kaisha Separator structure of chain case

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170254409A1 (en) * 2016-03-07 2017-09-07 Toyota Jidosha Kabushiki Kaisha Case for endless transmission member
CN107165738A (zh) * 2016-03-07 2017-09-15 丰田自动车株式会社 环形传动部件用的箱
US10487937B2 (en) * 2016-03-07 2019-11-26 Toyota Jidosha Kabushiki Kaisha Case for endless transmission member
US20180010492A1 (en) * 2016-07-08 2018-01-11 Toyota Jidosha Kabushiki Kaisha Lubricant supply apparatus for chain in internal combustion engine
US11408311B2 (en) * 2016-07-08 2022-08-09 Toyota Jidosha Kabushiki Kaisha Lubricant supply apparatus for chain in internal combustion engine

Also Published As

Publication number Publication date
DE102011003003A1 (de) 2011-07-28
JP2011149343A (ja) 2011-08-04
DE102011123088B3 (de) 2020-03-12
CN102135022B (zh) 2013-01-09
DE102011003003B4 (de) 2018-08-23
CN102135022A (zh) 2011-07-27
JP5574270B2 (ja) 2014-08-20

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SUZUKI MOTOR CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HOSHITO, KATSUNI;REEL/FRAME:025766/0991

Effective date: 20110107

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION