Supercharger for engine

Patent metadata

Field	Value
Publication number	US-2016208683-A1
Application number	US-201615085846-A
Country	US
Kind code	A1
Filing date	Mar 30, 2016
Priority date	Nov 18, 2013
Publication date	Jul 21, 2016
Grant date	—

Abstract

A supercharger is driven by a rotational force of a crankshaft of a combustion engine via a chain. The supercharger includes: a supercharger rotation shaft to which an impeller is fixed; a supercharger holder that rotatably supports the supercharger rotation shaft; and a hydraulic tensioner that is mounted on the supercharger holder and suppresses slack of the chain. In the supercharger holder, a supercharger lubricating oil passage that introduces a lubricating oil to the supercharger is formed. A part of the lubricating oil introduced to the supercharger lubricating oil passage is supplied to a hydraulic cylinder of the hydraulic tensioner through a branch path.

First claim

What is claimed is:

1 . A supercharger for a combustion engine, the supercharger being driven by a rotational force of a crankshaft of the combustion engine via an endless band-shaped power transmission member, the supercharger comprising:
a supercharger lubricating oil passage configured to introduce a lubricating oil to the supercharger; a hydraulic biasing force generating device configured to suppress slack of the power transmission member, and a branch path branched off the supercharger lubricating oil passage, wherein a part of the lubricating oil introduced to the supercharger lubricating oil passage is supplied as a hydraulic source to the biasing force generating device through the branch path.

2 . The supercharger for the combustion engine as claimed in claim 1 , further comprising a biasing force generating device mounting portion on which the biasing force generating device is mounted, wherein
the branch path is formed in the biasing force generating device mounting portion.

3 . The supercharger for the combustion engine as claimed in claim 1 , further comprising a supercharger holder configured to support a supercharger rotation shaft and detachably mounted on a combustion engine case, wherein
the biasing force generating device is detachably mounted on the supercharger holder.

4 . The supercharger for the combustion engine as claimed in claim 3 , wherein:
the combustion engine includes a lubricating oil pump accommodated in the combustion engine case; the supercharger lubricating oil passage is formed in the supercharger holder and supplied with the lubricating oil from the lubricating oil pump; and the supercharger lubricating oil passage opens in abutting surfaces of the supercharger holder and the combustion engine case.

5 . The supercharger for the combustion engine as claimed in claim 4 , wherein the lubricating oil pump introduces the lubricating oil to a portion-to-be-lubricated or a portion-to-be-cooled of the combustion engine.

6 . The supercharger for the combustion engine as claimed in claim 4 , wherein driving power is transmitted to the lubricating oil pump directly or indirectly from the crankshaft.

7 . The supercharger for the combustion engine as claimed in claim 3 , wherein:
the biasing force generating device includes a pressing member configured to pivot around a pivot shaft to apply a pressing force to the power transmission member; and the pivot shaft is supported by the combustion engine case.

8 . The supercharger for the combustion engine as claimed in claim 1 , wherein a part of the lubricating oil to be supplied to a bearing portion of the supercharger is branched to be supplied to the biasing force generating device.

9 . The supercharger for the combustion engine as claimed in claim 1 , wherein:
the biasing force generating device includes a pressing member configured to pivot around a pivot shaft to apply a pressing force to the power transmission member; and the pivot shaft is supported by the combustion engine case.

10 . The supercharger for the combustion engine as claimed in claim 1 , further comprising a supercharger holder configured to support a supercharger rotation shaft and detachably mounted on a combustion engine case, wherein:
the biasing force generating device is provided in the supercharger holder; and the power transmission member is driven such that the biasing force generating device is provided on a driven side of the power transmission member.

Assignees

• Kawasaki Heavy Ind Ltd

Inventors

• Naruoka Shohei
• Matsuda Yoshiharu

Classifications

• F16H57/0475

  Engine and gearing, i.e. joint lubrication or cooling or heating thereof · CPC title

• F16H57/0421

  on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like · CPC title

• F16H7/08

  Means for varying tension of belts, ropes or chains  (pulleys of adjustable construction F16H55/52) · CPC title

• F02B61/02

  for driving cycles · CPC title

• F01M2011/021

  for lubricating auxiliaries, e.g. pumps or turbo chargers · CPC title