Patent ID: 8047175
Filing Date: 2011-11-01
Classification: F16F,Y10T

Abstract:
1. An in-line four-cylinder engine for a vehicle including a crankshaft having first crank pins of two cylinders, wherein the first crank pins are provided on a common first virtual plane and are arranged with a 180° phase difference, and having second crank pins of another two cylinders, wherein the second crank pins are provided on a second virtual plane different by a 90° phase from the first virtual plane and are arranged with a 180° phase difference, the in-line four-cylinder engine comprising: a crankshaft satisfying a formula of (k wherein, when a crank web for each of at least two cylinders is divided between a pair of half crank webs facing a crank pin, wherein k D a primary balancer for generating a couple vector offsetting a vector of the first inertia couple.