| 摘要 |
<p>A balance weight system of a crankshaft includes a first balance weight in which a mass center thereof ranges from approximately +78 to approximately +82 degrees based on the horizontal line, a ninth balance weight in which a mass center thereof ranges from approximately−82 to approximately−78 degrees, a second balance weight in which a mass center thereof ranges from approximately +86.5 to approximately +89 degrees, a eighth balance weight in which a mass center thereof ranges from approximately−89 to approximately−86.5 degrees, and at least one balance weight group of which size of rotational inertia moment thereof ranges from approximately 13 to approximately 17% compared with the first or ninth balance weight, wherein rotational inertia moment size of the second and eighth balance weights ranges from approximately 15 to approximately 25% compared with the first and ninth balance weights.</p> |
