Abstract: An oil return passage for returning oil from a cylinder head to an oil pan is arranged along the downward first side surface of an engine that is mounted in a vehicle such that a center axis of a cylinder thereof is slanted with respect to a vertical direction of the vehicle. An oil return extension pipe is coupled to an outlet end of the oil return passage, and extends toward a second side surface of the engine that is opposite from the first side surface on which the oil return passage is provided. Thus, engine oil can be reliably returned to the oil pan from the cylinder head of the engine even when the vehicle is experiencing high acceleration in a direction that tends to cause backflow of the oil through the engine oil return system.
Type:
Grant
Filed:
March 24, 2006
Date of Patent:
November 27, 2007
Assignees:
Nissan Motor Co., Ltd., Mahle Powertrain Ltd.
Inventors:
Noaki Nakada, Manabu Kato, Tomohiro Okamoto, Thomas Hale
Abstract: An oil return passage for returning oil from a cylinder head to an oil pan is arranged along the downward first side surface of an engine that is mounted in a vehicle such that a center axis of a cylinder thereof is slanted with respect to a vertical direction of the vehicle. An oil return extension pipe is coupled to an outlet end of the oil return passage, and extends toward a second side surface of the engine that is opposite from the first side surface on which the oil return passage is provided. Thus, engine oil can be reliably returned to the oil pan from the cylinder head of the engine even when the vehicle is experiencing high acceleration in a direction that tends to cause backflow of the oil through the engine oil return system.
Type:
Application
Filed:
March 24, 2006
Publication date:
October 5, 2006
Applicants:
Nissan Motor Co., Ltd., Mahle Powertrain Ltd.
Inventors:
Naoki Nakada, Manabu Kato, Tomohiro Okamoto, Thomas Hale