JPS57210127A - Autobicycle engine - Google Patents

Autobicycle engine

Info

Publication number
JPS57210127A
JPS57210127A JP9238281A JP9238281A JPS57210127A JP S57210127 A JPS57210127 A JP S57210127A JP 9238281 A JP9238281 A JP 9238281A JP 9238281 A JP9238281 A JP 9238281A JP S57210127 A JPS57210127 A JP S57210127A
Authority
JP
Japan
Prior art keywords
parts
lower case
exhaust pipe
case
subshaft
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
JP9238281A
Other languages
Japanese (ja)
Other versions
JPH0125885B2 (en
Inventor
Yoshiharu Isaka
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 JP9238281A priority Critical patent/JPS57210127A/en
Publication of JPS57210127A publication Critical patent/JPS57210127A/en
Publication of JPH0125885B2 publication Critical patent/JPH0125885B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
    • 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
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/02—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving cycles
    • 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
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1816—Number of cylinders 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

Abstract

PURPOSE:To increase a space around a rear side exhaust pipe, in an engine arranged with front and rear cylinders to V-shape, by vertically dividing a crank case, mounting a crankshaft to the mated surface of both upper and lower case parts and equipping a main shaft and subshaft to the lower case part. CONSTITUTION:A cylinder body 9 is formed so as to longitudinally arrange cylinders 9b, 9b' to a V-type, and a crank case is constituted from upper and lower two parts 13, 14, then the upper case part 13 is of construction combined with a lower part of the cylinder body 9. Then a crankshaft 16 is mounted in a state held between the both parts 13, 14 to the front part of a mated surface 15 in which the upper and lower case parts 13, 14 are placed at a face-to-face position. While a main shaft 19 and subshaft 20 in a transmission device are equipped to a rear part in the lower case part 14. In this way, a space for an exhaust pipe 10', extended from a cylinder head 9'a of the rear cylinder 9'b toward the rear, can be fully ensured to prevent an increase of exhaust resistance due to an unreasonable curve of the exhaust pipe 10'.
JP9238281A 1981-06-17 1981-06-17 Autobicycle engine Granted JPS57210127A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9238281A JPS57210127A (en) 1981-06-17 1981-06-17 Autobicycle engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9238281A JPS57210127A (en) 1981-06-17 1981-06-17 Autobicycle engine

Related Child Applications (2)

Application Number Title Priority Date Filing Date
JP29335088A Division JPH01290953A (en) 1988-11-19 1988-11-19 Motorcycle engine
JP10306290A Division JPH02291427A (en) 1990-04-20 1990-04-20 Engine for motorcycle

Publications (2)

Publication Number Publication Date
JPS57210127A true JPS57210127A (en) 1982-12-23
JPH0125885B2 JPH0125885B2 (en) 1989-05-19

Family

ID=14052867

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9238281A Granted JPS57210127A (en) 1981-06-17 1981-06-17 Autobicycle engine

Country Status (1)

Country Link
JP (1) JPS57210127A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03149450A (en) * 1990-09-26 1991-06-26 Yamaha Motor Co Ltd Two-cycle v-type engine
JPH0395037U (en) * 1990-01-17 1991-09-27

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5450719A (en) * 1977-09-29 1979-04-20 Yamaha Motor Co Ltd Multi-cylinder v-type engine for motorcycle
JPS5452239A (en) * 1977-09-30 1979-04-24 Yamaha Motor Co Ltd Engine cooling system for cooling engine of motor bicycle
JPS5572630A (en) * 1978-11-24 1980-05-31 Yamaha Motor Co Ltd Vehicle engine
JPS55161919A (en) * 1979-06-02 1980-12-16 Bayerische Motoren Werke Ag Single train multiicylinder internal combustion engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5450719A (en) * 1977-09-29 1979-04-20 Yamaha Motor Co Ltd Multi-cylinder v-type engine for motorcycle
JPS5452239A (en) * 1977-09-30 1979-04-24 Yamaha Motor Co Ltd Engine cooling system for cooling engine of motor bicycle
JPS5572630A (en) * 1978-11-24 1980-05-31 Yamaha Motor Co Ltd Vehicle engine
JPS55161919A (en) * 1979-06-02 1980-12-16 Bayerische Motoren Werke Ag Single train multiicylinder internal combustion engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0395037U (en) * 1990-01-17 1991-09-27
JPH03149450A (en) * 1990-09-26 1991-06-26 Yamaha Motor Co Ltd Two-cycle v-type engine
JPH0571823B2 (en) * 1990-09-26 1993-10-08 Yamaha Motor Co Ltd

Also Published As

Publication number Publication date
JPH0125885B2 (en) 1989-05-19

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