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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.:

US 10634018 B1

PDFFull Text
Date of Patent:
Apr. 28, 2020

Filed:

Apr. 01, 2016

Internal combustion engine

Applicant:

Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;

Inventor:

Hiroki Hara, Nagoya, JP;

Assignee:

TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Jacob M Amick

Assistant Examiner:

Omar Morales

Int. Cl.
CPC ...
F01L 9/02 (2006.01); F01L 1/047 (2006.01); F01L 1/24 (2006.01); F01L 1/18 (2006.01); F02M 59/44 (2006.01); F01L 1/46 (2006.01); F01L 1/053 (2006.01); F02B 67/04 (2006.01); B60T 17/02 (2006.01); F02B 63/06 (2006.01); F01M 9/10 (2006.01);
U.S. Cl.
CPC ...
F01L 9/026 (2013.01); B60T 17/02 (2013.01); F01L 1/047 (2013.01); F01L 1/053 (2013.01); F01L 1/18 (2013.01); F01L 1/24 (2013.01); F01L 1/2405 (2013.01); F01L 1/46 (2013.01); F01M 9/10 (2013.01); F02B 63/06 (2013.01); F02B 67/04 (2013.01); F02M 59/44 (2013.01); F01L 1/185 (2013.01); F01L 2001/0537 (2013.01); F01L 2001/2444 (2013.01); F01L 2105/00 (2013.01); F01L 2250/04 (2013.01); F01L 2810/02 (2013.01);
Abstract

An internal combustion engine includes an intake camshaft, a vacuum pump, an oil pump, and an oil feeding passage serving as an oil supplying path. The vacuum pump includes a rotor and a housing. The vacuum pump is formed with a negative pressure chamber that generates a negative pressure, and an oil path connected to the negative pressure chamber. An atmosphere communication hole for supplying air to the negative pressure chamber through the oil feeding passage and the oil path when the vacuum pump is stopped is arranged in the oil feeding passage. The atmosphere communication hole communicates the negative pressure chamber and the atmosphere before an amount of oil in the housing exceeds an allowable oil amount when the vacuum pump is stopped.

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