Engine

Patent metadata

Field	Value
Publication number	US-10174720-B2
Application number	US-201414760929-A
Country	US
Kind code	B2
Filing date	Jan 14, 2014
Priority date	Jan 15, 2013
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

Abstract

Provided is an engine that suppresses the occurrence of knocking or an accidental fire, which makes it possible to perform the operations of premixed compression self-ignition. Regarding the present invention, an engine includes a reforming cylinder, which is a fuel reforming device, and the reforming cylinder is connected to an intake pipe and an EGR pipe via a supply pipe and connected to the intake pipe via an exhaust pipe, and a primary fuel injection device is provided that injects fuel to the mixture of intake air and exhaust gas supplied to the reforming cylinder through the supply pipe.

First claim

The invention claimed is:

1. An engine comprising:
a fuel reforming device constituted with a reforming cylinder, the fuel reforming device configured to connect to:
an intake pipe at a first location of the intake pipe via a supply pipe,
an EGR pipe via the supply pipe; and
the intake pipe at a second location of the intake pipe via an exhaust pipe coupled to an outlet of the reforming cylinder, the second location of the intake pipe positioned downstream of the first location of the intake pipe;
a primary fuel injection device configured to inject fuel to a mixture of intake air and exhaust gas supplied to the fuel reforming device via the supply pipe, the exhaust gas supplied to the fuel reforming device from an outlet of an output cylinder via the EGR pipe; and
a reforming fuel intercooler included in the exhaust pipe and connected to the intake pipe a via the exhaust pipe, the reforming fuel intercooler configured to receive reforming fuel from the reforming cylinder, cool the reforming fuel, and supply the cooled reforming fuel to the output cylinder via the intake pipe,
wherein the reforming cylinder is configured to adiabatically compress the mixture, to which the fuel is injected, by means of a reciprocating movement of a reforming piston, and reform the fuel to a lower hydrocarbon fuel by the reforming cylinder; and
wherein the primary fuel injection device is arranged in the reforming cylinder and is configured to control injection of the fuel at a suction stroke or a first half of a compression stroke of the intake air.

2. The engine according to claim 1 , further comprising:
an auxiliary fuel injection device provided in the output cylinder,
the auxiliary fuel injection device configured to control injection of the fuel at an adiabatic compression stroke or a first half of an expansion stroke of the output cylinder.

3. The engine according to claim 1 , further comprising:
a supercharger coupled to the intake pipe and to an exhaust pipe of the output cylinder.

4. The engine according to claim 3 , wherein the supercharger comprises:
a compressor comprising an outlet coupled to the intake pipe; and
a turbine comprising an inlet coupled to the exhaust pipe and configured to receive at least a portion of the exhaust gas that is output by the output cylinder.

5. The engine according to claim 1 , wherein an output crank shaft corresponding to the output cylinder is independent of the reforming cylinder.

6. The engine according to claim 1 , further comprising:
a mixer positioned at the second location and comprising an outlet coupled to an inlet of the output cylinder, the mixer configured to receive the cooled reforming fuel.

7. The engine according to claim 1 , wherein the reforming cylinder is in fluid communication with a single output cylinder, the single output cylinder comprises the output cylinder.

8. The engine according to claim 1 , wherein the reforming cylinder is in fluid communication with multiple output cylinders, the multiple output cylinders comprise the output cylinder.

9. An engine comprising:
a fuel reforming device constituted with a reforming cylinder, the fuel reforming device configured to connect to:
an intake pipe at a first location of the intake pipe via a supply pipe;
an EGR pipe via the supply pipe; and
the intake pipe at a second location of the intake pipe via an exhaust pipe coupled to an outlet of the reforming cylinder, the second location of the intake pipe positioned downstream of the first location of the intake pipe;

a primary fuel injection device configured to inject fuel to a mixture of intake air and exhaust gas supplied to the fuel reforming device via the supply pipe, the exhaust gas supplied to the fuel reforming device from an outlet of an output cylinder via the EGR pipe; and
a reforming fuel intercooler included in the exhaust pipe and connected to the intake pipe via the exhaust pipe, the reforming fuel intercooler configured to receive reforming fuel from the reforming cylinder, cool the reforming fuel, and supply the cooled reforming fuel to the output cylinder via the intake pipe,
wherein the reforming cylinder is configured to adiabatically compress the mixture, to which the fuel is injected, by means of a reciprocating movement of a reforming piston, and reform the fuel to a lower hydrocarbon fuel by the reforming cylinder; and
wherein the primary fuel injection device is arranged in the supply pipe and is configured to control injection of the fuel when the mixture is supplied to the reforming cylinder.

10. The engine according to claim 9 , further comprising:
an auxiliary fuel injection device provided in the output cylinder,
the auxiliary fuel injection device configured to control injection of the fuel at an adiabatic compression stroke or a first half of an expansion stroke of the output cylinder.

11. The engine according to claim 9 , further comprising:
a supercharger coupled to the intake pipe and to an exhaust pipe of the output cylinder.

12. The engine according to claim 11 , wherein the supercharger comprises:
a compressor comprising an outlet coupled to the intake pipe; and
a turbine comprising an inlet coupled to the exhaust pipe and configured to receive at least a portion of the exhaust gas that is output by the output cylinder.

13. The engine according to claim 9 , wherein an output crank shaft corresponding to the output cylinder is independent of the reforming cylinder.

14. The engine according to claim 9 , further comprising:
a mixer positioned at the second location and comprising an outlet coupled to an inlet of the output cylinder, the mixer configured to receive the cooled reforming fuel.

15. The engine according to claim 9 , wherein the reforming cylinder is in fluid communication with a single output cylinder, the single output cylinder comprises the output cylinder.

16. The engine according to claim 9 , wherein the reforming cylinder is in fluid communication with multiple output cylinders, the multiple output cylinders comprise the output cylinder.

17. An engine comprising:
a fuel reforming device configured to connect to:
an intake pipe at a first location of the intake pipe via a supply line;
an EGR pipe via the supply pipe; and
the intake pipe at a second location of the intake pipe via an exhaust pipe, the second location of the intake pipe positioned downstream of the first location of the intake pipe;

a primary fuel injection device configured to inject fuel to a mixture of intake air and exhaust gas supplied to the fuel reforming device via the supply pipe, the exhaust gas supplied to the fuel reforming device from an outlet of an output cylinder via the EGR pipe, wherein the fuel reforming device configured to reform the fuel to a lower hydrocarbon fuel;
a reforming fuel intercooler included in the exhaust pipe and connected to the intake pipe a via the exhaust pipe, the reforming fuel intercooler configured to receive reforming fuel from the fuel reforming device, cool the reforming fuel, and supply the cooled reforming fuel to the output cylinder via the intake pipe; and
the output cylinder including an auxiliary fuel injection device configured to control injection of the fuel at an adiabatic compression stroke or a first half of an expansion stroke of the output cylinder.

18. The engine according to claim 17 , further comprising:
a supercharger coupled to the intake pipe and to an exhaust pipe of the output cylinder, the supercharger comprising:
a compressor comprising an outlet coupled to the intake pipe;

Assignees

• Yanmar Co Ltd

Inventors

• Asai Gou

Classifications

• 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

• F02M31/20

  for cooling ({F02M31/005 takes precedence; use of cold F02M17/52;} cooling of charging-air or of scavenging-air F02B29/04) · CPC title

• F02M31/08

  the gases being exhaust gases {(adding exhaust gases to the air intake passage F02M26/00)} · CPC title

• F02M26/36

  with means for adding fluids other than exhaust gas to the recirculation passage; with reformers · CPC title