EXHAUST VALVE DRIVE DEVICE AND INTERNAL COMBUSTION ENGINE EQUIPPED WITH SAME

Title:

EXHAUST VALVE DRIVE DEVICE AND INTERNAL COMBUSTION ENGINE EQUIPPED WITH SAME

Document Type and Number:

WIPO Patent Application WO/2015/098219

Kind Code:

A1

Abstract:

The objective of the present invention is to enable the timing for closing an exhaust valve to be changed by means of a simple configuration suitable for an internal combustion engine for a ship, and to adapt the characteristic of the internal combustion engine to the operating state. This exhaust valve drive device (1) is equipped with: a piston (7) provided on an exhaust valve (5) of an internal combustion engine; a cylinder (9) in which the piston (7) is housed; an oil pressure supply device (13) that is driven by a cam (35) and intermittently supplies oil pressure to the cylinder (9) with a prescribed valve-opening timing, thereby pressing the piston (7) and opening the exhaust valve (5); an air spring device (15) that biases the exhaust valve (5) in the direction of closing; a convex part (7a), which is formed on the top surface of the piston (7), and the top surface area of which is smaller than the cross-sectional surface area of the piston (7); a concave part (9a), which is formed in the ceiling surface of the cylinder (9), and into which the convex part (7a) is inserted with a gap therebetween when the piston (7) rises; an actuator (17) that changes the depth of the concave part (9a); and a control device (19) that controls the actuator (17).

More Like This:

WO/2017/071703	VALVE TIMING ACTUATOR COMPRISING A IRON CHIP COLLECTING MAGNET IN AN OIL PIPE
WO/2006/042785	METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE
JP7082144	Hydraulic piston with gasket valve for cooling and lubrication

Inventors:

ISHIDA HIROYUKI (JP)
MURATA SATORU (JP)
OKUMURA NAOKI (JP)
MIYANAGI AKIHIRO (JP)
MIZOGUCHI JUNJI (JP)
YANAGI JUN (JP)
EDO KOJI (JP)

Application Number:

PCT/JP2014/075754

Publication Date:

July 02, 2015

Filing Date:

September 26, 2014

Export Citation:

Click for automatic bibliography generation Help

Assignee:

MITSUBISHI HEAVY IND LTD (JP)

International Classes:

F01L9/14

Foreign References:

JPH0726922A	1995-01-27
JPH0158740U	1989-04-12

Attorney, Agent or Firm:

FUJITA, Takaharu et al. (JP)
Takaharu Fujita (JP)

Download PDF:

View/Download PDF PDF Help

Previous Patent: ENDOSCOPIC DEVICE, METHOD FOR CONTROLLING ENDOSCOPIC DEVICE, AND PROGRAM

Next Patent: INKJET PRINTING APPARATUS AND CONTROL METHOD THEREFOR