The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 24, 1987
Filed:
Jul. 17, 1985
Katsutoshi Kitagawa, Toyota, JP;
Abstract
This four stroke V-configuration engine has two cylinder banks which have equal numbers of cylinders, angled with respect to one another at a bank angle .alpha. different from 90.degree.. For each bank of cylinders, the angular positions of the crank shaft crank pins therefor are evenly spaced apart around the central axis of the crank shaft, and between the banks of cylinders the angular positions of a pair of corresponding cylinders are separated by a crank angle of 90.degree.-.alpha.. A first set of balance weights is provided so as to rotate about an axis parallel to the rotational axis of the crank shaft in the same direction and at the same speed as the crank shaft, and a second set of balance weights is provided so as to rotate about an axis parallel to the rotational axis of the crank shaft in the opposite direction and at the same speed as the crank shaft. The positions and the weights of the first and second sets of balance weights are such as to cancel out the first order imbalance moments of reciprocating and of rotational motion.