Engine lubrication structure and motorcycle

Patent metadata

Field	Value
Publication number	US-10190452-B2
Application number	US-201615335143-A
Country	US
Kind code	B2
Filing date	Oct 26, 2016
Priority date	Oct 27, 2015
Publication date	Jan 29, 2019
Grant date	Jan 29, 2019

Abstract

An engine lubrication structure supplies oil from an oil pump to individual components of an engine in which a balancer shaft is disposed parallel with a crank shaft in a crank case, the engine includes a turbocharger which compresses intake air using exhaust gas of the engine; a main gallery which supplies oil to a bearing of the crank shaft and a bearing of the balancer shaft and a sub-gallery which supplies, to individual components of the engine, oil that has been supplied to the bearing of the balancer shaft are provided in the crank case; and an oil passage which supplies oil to the turbocharger is connected to the sub-gallery.

First claim

What is claimed is:

1. An engine lubrication structure which supplies oil from an oil pump to individual components of an engine in which a balancer shaft is disposed parallel with a crank shaft in a crank case, wherein:
the engine comprises a turbocharger which compresses intake air using exhaust gas of the engine;
a main gallery which supplies oil to a bearing of the crank shaft via a first oil passage and supplies oil to a bearing of the balancer shaft via a second oil passage, and a sub-gallery which supplies the oil flowing past the bearing of the balancer shaft and supplied to the sub-gallery via a third oil passage connecting the bearing of the balancer shaft and the sub-gallery to individual components of the engine via a fourth oil passage shaft are provided in the crank case; and
a fifth oil passage which supplies oil to the turbocharger is connected to the sub-gallery.

2. The engine lubrication structure according to claim 1 , wherein the sub-gallery is provided with a piston jet which jets oil toward a piston.

3. The engine lubrication structure according to claim 1 , wherein:
the balancer shaft is disposed below the sub-gallery; and
the main gallery is disposed below the balancer shaft.

4. The engine lubrication structure according to claim 1 , wherein:
an oil return passage which returns oil that has been supplied to the turbocharger to the crank case is connected to the crank case;
the balancer shaft is disposed in front of the crank shaft; and
the oil return passage is connected to a wall of a balancer room which houses the balancer shaft.

5. A motorcycle comprising the engine lubrication structure according to claim 1 .

Assignees

• Suzuki Motor Corp

Inventors

• Tsukamoto Kohei
• Yagi Shintaro

Classifications

• F01M2001/083

  for lubricating cylinders · CPC title

• F01M1/08

  Lubricating systems characterised by the provision therein of lubricant jetting means · CPC title

• F01M2001/062

  Crankshaft with passageways · CPC title

• F16F15/264

  Rotating balancer shafts (F16F15/262 takes precedence) · CPC title

• F01M2011/021

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