CRANKSHAFT OF FOUR-CYLINDERED ENGINE

PURPOSE:To prevent the partial wear of a journal bearing from occurring by keeping off a vibration in an engine due to the material unbalance between two crank parts for the third and fourth cylinders. CONSTITUTION:A counter weight 14 is formed in only one crank arm 12a of four crank parts 21 to 24...

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Bibliographic Details
Main Authors MORIMOTO YOSUKE, HATAURA KIYOSHI, MIYAZAKI MANABU, MIKUMO HIROSHI
Format Patent
LanguageEnglish
Published 15.07.1994
Edition5
Subjects
BEARINGS
BLASTING
ELEMENTS OR CRANKSHAFT MECHANISMS
ENGINEERING ELEMENTS AND UNITS
FLEXIBLE SHAFTS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MEANS FOR DAMPING VIBRATION
MECHANICAL ENGINEERING
ROTARY BODIES OTHER THAN GEARING ELEMENTS
SHAFTS
SHOCK-ABSORBERS
SPRINGS
THERMAL INSULATION IN GENERAL
WEAPONS
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Summary:PURPOSE:To prevent the partial wear of a journal bearing from occurring by keeping off a vibration in an engine due to the material unbalance between two crank parts for the third and fourth cylinders. CONSTITUTION:A counter weight 14 is formed in only one crank arm 12a of four crank parts 21 to 24 for those of first, second, third and fourth cylinders of a crankshaft 10, and a ringlike balancer driving gear 15 is tightly installed in a crank arm 12b with no counter weight 14 of the crank part 24 for the fourth cylinder. An offsetting balance part M is solidly formed in the other side crank part 12b with no counter weight 14 of at least the crank part 23 for the third cylinder. This offsetting balance part M offsets the material unbalance between the third cylinder crank part 23 and the fourth cylinder crank part 24 due to a fact that the balancer driving gear 15 is installed tight.
Bibliography:Application Number: JP19920359103