Oil jet

• US 10,233,816 B2
• Filed: 06/09/2014
• Issued: 03/19/2019
• Est. Priority Date: 08/09/2013
• Status: Active Grant

• Current Assignee: Taiho Kogyo Company Limited, Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Taiho Kogyo Company Limited, Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Honda, Akihiro, Murakami, Motoichi, Kawahara, Masahiro, Imai, Norio
• Primary Examiner(s): Solis, Erick
• Application Number:
  US14/910,857
• Publication Number:
  US 20160186642A1
• Time in Patent Office: 1,744 Days
• CPC Class Codes: F01M 1/08 Lubricating systems characterised by the provision therein of lubricant jetting means
• CPC Class Codes: F01M 2001/083 for lubricating cylinders
• CPC Class Codes: F01P 3/08 Cooling of piston exterior only, e.g. by jets

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.

Claims

1. An oil jet, comprising:

a body having;

an oil supply port which opens into an oil passage in a cylinder block of an internal combustion engine,

a cylinder having a first end which is communicated with the oil supply port, a second end which is closed, and a side surface extending between the first end and second end, and

an oil injection port which opens on the side surface of the cylinder;

a piston valve that is accommodated in the cylinder and contacts a portion of the side surface of the cylinder between the oil supply port and the second end of the cylinder to form a compartment in the cylinder, and includes an orifice which makes the compartment being communicated with 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 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 is for fixing a direction of injection of oil.

2. The oil jet according to claim 1,

wherein the second 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.