Oil Jet

Patent metadata

Field	Value
Publication number	US-2016186642-A1
Application number	US-201414910857-A
Country	US
Kind code	A1
Filing date	Jun 9, 2014
Priority date	Aug 9, 2013
Publication date	Jun 30, 2016
Grant date	—

Abstract

A body of an oil jet is provided with: an oil supply port; a cylinder; and an oil injection port. A piston valve is accommodated in the cylinder. The piston valve forms in the cylinder a differential pressure room which is a closed compartment. In the piston valve, an orifice which makes the differential pressure room being communicated with a side of the oil supply port is formed. The piston valve is biased toward a position at which the oil injection port is closed by a spring. A first oil injection nozzle is connected to the oil injection port. A leak hole which allows oil to be leaked outside of the cylinder from the differential pressure room is open at the side surface of the cylinder. Further, a second oil injection nozzle is connected to the leak hole.

First claim

1 . An oil jet, comprising:
a body that has an oil supply port which opens into an oil passage in a cylinder block of an internal combustion engine, a cylinder one end of which is communicated with the oil supply port and another end of which is closed, and an oil injection port which opens on a side surface of the cylinder; a piston valve that is accommodated in the cylinder to form a closed compartment in the cylinder, and includes an orifice which makes the closed compartment being communicated with a side of the oil supply port; a spring that biases the piston valve toward a position at which the oil injection port is closed; and a first oil injection nozzle that is connected to the oil injection port and is fixing a direction of injection of oil, wherein a leak hole which allows oil to be leaked outside the cylinder from the closed compartment is open at the side surface of the cylinder, the leak hole being configured as a hole in which a flow rate is determined based on Hagen-Poiseuille law, and wherein the oil jet further comprises: a stopper for limiting a moving range of the piston valve so that the leak hole is not covered by the piston valve; and a second injection nozzle that is connected to the leak hole and that for fixing a direction of injection of oil.

2 . The oil jet according to claim 1 ,
wherein the other end of the cylinder that is closed is positioned at a lower side in a direction of gravitational force in the cylinder relative to a position of opening of the leak hole with respect to the cylinder.

3 . The oil jet according to claim 1 ,
wherein a distal end of the first oil injection nozzle is directed to a back side of a piston that reciprocates in a cylinder of the internal combustion engine, and wherein a distal end of the second oil injection nozzle is directed to a cylinder bore of the internal combustion engine.

Assignees

• Toyota Motor Co Ltd
• Taiho Kogyo Co Ltd

Inventors

• Honda Akihiro
• Murakami Motoichi
• Kawahara Masahiro
• Imai Norio

Classifications

• F01P3/08 Primary

  Cooling of piston exterior only, e.g. by jets · CPC title

• F01M2001/083

  for lubricating cylinders · CPC title

• F01M1/08

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