JPS57183527A - Four-cycle engine - Google Patents

Four-cycle engine

Info

Publication number
JPS57183527A
JPS57183527A JP6909981A JP6909981A JPS57183527A JP S57183527 A JPS57183527 A JP S57183527A JP 6909981 A JP6909981 A JP 6909981A JP 6909981 A JP6909981 A JP 6909981A JP S57183527 A JPS57183527 A JP S57183527A
Authority
JP
Japan
Prior art keywords
intake
center line
valves
bore
cylinder
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.)
Pending
Application number
JP6909981A
Other languages
Japanese (ja)
Inventor
Koji Hosoi
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.)
Yamaha Motor Co Ltd
Original Assignee
Yamaha Motor 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 Yamaha Motor Co Ltd filed Critical Yamaha Motor Co Ltd
Priority to JP6909981A priority Critical patent/JPS57183527A/en
Publication of JPS57183527A publication Critical patent/JPS57183527A/en
Priority to US06/704,155 priority patent/US4658780A/en
Pending legal-status Critical Current

Links

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
    • F01L1/14—Tappets; Push rods
    • F01L1/143—Tappets; Push rods for use with overhead camshafts
    • 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
    • F02F1/242—Arrangement of spark plugs or injectors
    • 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
    • F02F1/4221—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder particularly for three or more inlet valves
    • 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
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
    • 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
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
    • F02B2023/085—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition using several spark plugs per cylinder
    • 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
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
    • 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
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/18—DOHC [Double overhead camshaft]
    • 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
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis

Landscapes

  • 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)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Abstract

PURPOSE:To prevent a masking effect and facilitate the attachment of spark plugs, by providing an intake valve near the center line of a cylinder bore and other intake valves and exhaust valves at both the sides of an axis extending on the center line of the bore, so that the intake smoothly flows into a combustion chamber. CONSTITUTION:An intake valve 14 is provided on the center line 12 of the bore of a cylinder 10. Other intake valves 22, 24 are provided at one side of an axis 16 extending on the center line 12 of the cylinder bore and exhaust valves 26, 28 are provided at the other side. Spark plugs 18, 20 are provided on the axis 16 at both the sides of the intake valve 14. The tops of the intake valves 14, 22, 24 are inclined leftward and those of the exhaust valves 26, 28 are inclined rightward so that a V-shaped space is defined between them. As a result, the intake smoothly flows from the valve 14 into a combustion chamber because the intake is not obstructed by the inside surface of the cylinder 10. For that reason, a masking effect is not produced. In addition, an enough mounting space is assured for the spark plugs 18, 20.
JP6909981A 1981-05-08 1981-05-08 Four-cycle engine Pending JPS57183527A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP6909981A JPS57183527A (en) 1981-05-08 1981-05-08 Four-cycle engine
US06/704,155 US4658780A (en) 1981-05-08 1985-02-22 Four cycle internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6909981A JPS57183527A (en) 1981-05-08 1981-05-08 Four-cycle engine

Publications (1)

Publication Number Publication Date
JPS57183527A true JPS57183527A (en) 1982-11-11

Family

ID=13392832

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6909981A Pending JPS57183527A (en) 1981-05-08 1981-05-08 Four-cycle engine

Country Status (1)

Country Link
JP (1) JPS57183527A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4615309A (en) * 1984-04-11 1986-10-07 Yamaha Hatsudoki Kabushiki Kaisha Valve actuating mechanism for internal combustion engine
US4651696A (en) * 1984-08-16 1987-03-24 Yamaha Hatsudoki Kabushiki Kaisha Four-stroke internal combustion engine
EP0271950A2 (en) * 1986-12-17 1988-06-22 ALFA LANCIA S.p.A. Head for an internal combustion reciprocating engine
JPH02196122A (en) * 1989-01-24 1990-08-02 Nissan Motor Co Ltd Combustion chamber in internal combustion engine
JPH02215921A (en) * 1989-02-14 1990-08-28 Nissan Motor Co Ltd Combustion chamber of internal combustion engine
JPH02241922A (en) * 1989-03-15 1990-09-26 Nissan Motor Co Ltd Combustion chamber in internal combustion engine
JPH02301619A (en) * 1989-05-17 1990-12-13 Nissan Motor Co Ltd Combustion chamber structure of internal combustion engine
JPH02301620A (en) * 1989-05-17 1990-12-13 Nissan Motor Co Ltd Combustion chamber of internal combustion engine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4615309A (en) * 1984-04-11 1986-10-07 Yamaha Hatsudoki Kabushiki Kaisha Valve actuating mechanism for internal combustion engine
US4651696A (en) * 1984-08-16 1987-03-24 Yamaha Hatsudoki Kabushiki Kaisha Four-stroke internal combustion engine
EP0271950A2 (en) * 1986-12-17 1988-06-22 ALFA LANCIA S.p.A. Head for an internal combustion reciprocating engine
JPH02196122A (en) * 1989-01-24 1990-08-02 Nissan Motor Co Ltd Combustion chamber in internal combustion engine
JPH02215921A (en) * 1989-02-14 1990-08-28 Nissan Motor Co Ltd Combustion chamber of internal combustion engine
JPH02241922A (en) * 1989-03-15 1990-09-26 Nissan Motor Co Ltd Combustion chamber in internal combustion engine
JPH02301619A (en) * 1989-05-17 1990-12-13 Nissan Motor Co Ltd Combustion chamber structure of internal combustion engine
JPH02301620A (en) * 1989-05-17 1990-12-13 Nissan Motor Co Ltd Combustion chamber of internal combustion engine

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