Engine

Patent metadata

Field	Value
Publication number	US-9982608-B2
Application number	US-201515507911-A
Country	US
Kind code	B2
Filing date	Aug 31, 2015
Priority date	Sep 5, 2014
Publication date	May 29, 2018
Grant date	May 29, 2018

Abstract

The purpose of the present invention is to provide an engine with reforming cylinders which are fuel reforming devices capable of supplying a reformed fuel according to the outputs of outputting cylinders. The engine is provided with the outputting cylinders for burning the fuel and the reforming cylinders which are the fuel reforming devices for reforming the fuel through the reciprocating motions of pistons. The amount of reformed fuel supplied to all the outputting cylinders is changed according to the outputs of the outputting cylinders while maintaining the amount of supplied fuel and the amount of suctioned gas, which are supplied into one reforming cylinder.

First claim

The invention claimed is:

1. An engine comprising:
an outputting cylinder configured to combust fuel; and
a reforming cylinder configured to reform the fuel through back and forth movement of a piston,
wherein an amount of reformed fuel supplied to the outputting cylinder is changed in accordance with an output from the outputting cylinder, while maintaining an amount of supplied fuel and an amount of suctioned gas to one reforming cylinder.

2. The engine according to claim 1 , wherein at least one of a compression rate and an expansion rate of the reforming cylinder is changed based on temperature of reformed fuel discharged from the reforming cylinder.

3. The engine according to claim 1 ,
wherein the reforming cylinder includes
an expansion chamber changing a volume thereof in accordance with the back and forth movement of the piston; and
a reaction chamber with a constant volume,

wherein the expansion chamber and the reaction chamber are in communication with each other.

4. The engine according to claim 1 ,
wherein the reforming cylinder is coupled with an intake air pipe through which intake air from outside is supplied and an EGR pipe through which exhaust air from the outputting cylinder is supplied, and
wherein the reforming cylinder is provided with a fuel injection device that supplies fuel to a mixture of the intake air and the exhaust air supplied to the reforming cylinder and an additive injection device that supplies an additive based on an amount of supplied fuel and an amount of the mixture.

Assignees

• Yanmar Co Ltd

Inventors

• Asai Go

Classifications

• F02M33/00

  Other apparatus for treating combustion-air, fuel or fuel-air mixture (combustion-air cleaners F02M35/00; arrangements for purifying liquid fuel F02M37/22) · CPC title

• F02D25/00

  Controlling two or more co-operating engines · CPC title

• F02B73/00

  Combinations of two or more engines, not otherwise provided for · CPC title

• F02M35/112

  for engines with cylinders all in one line · CPC title

• F02B51/00

  Other methods of operating engines involving pretreating of, or adding substances to, combustion air, fuel, or fuel-air mixture of the engines · CPC title