Internal combustion engine

Patent metadata

Field	Value
Publication number	US-9850807-B2
Application number	US-201614990104-A
Country	US
Kind code	B2
Filing date	Jan 7, 2016
Priority date	Jan 23, 2015
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

An internal combustion engine including a pre-chamber connected to a pre-chamber feed conduit for supplying the pre-chamber with a fuel (F), and a main combustion chamber. Fuel (F) in the main combustion chamber can be ignited by an ignition flare which passes from the at least one pre-chamber into the at least one main combustion chamber and which is produced by ignition of fuel (F) in the pre-chamber. At least one valve can be open-loop or closed-loop controlled by an open-loop or closed-loop control device depending on a parameter characteristic of a change in a power produced by the internal combustion engine, and/or by which a pre-chamber fuel flow directed through the pre-chamber feed conduit to the at least one pre-chamber can be at least partially diverted into a volume separate from the at least one pre-chamber.

First claim

The invention claimed is:

1. An internal combustion engine comprising:
at least one pre-chamber;
a pre-chamber feed conduit connected to the at least one pre-chamber for supplying an ignition fuel as a pre-chamber ignition fuel feed to the at least one pre-chamber;
at least one main combustion chamber connected to the at least one pre-chamber wherein a fuel in the at least one main combustion chamber is ignited by ignition of the ignition fuel in the pre-chamber;
at least one valve arranged in the pre-chamber feed conduit operative for reducing a pressure difference between the pre-chamber ignition fuel feed and the at least one main combustion chamber;
a non-return valve arranged in the pre-chamber feed conduit operative as needed to at least partially divert the pre-chamber ignition fuel feed into an intake manifold for pressure equalization; and
a control device operative based on a parameter characteristic of a change in a power produced by the internal combustion engine with a control valve affected by the control device to at least partially block the pre-chamber ignition fuel feed upon occurrence of the parameter characteristic of the change in the power produced by the internal combustion engine.

2. The internal combustion engine as set forth in claim 1 , wherein the at least partially diverted pre-chamber ignition fuel feed flows through a main chamber feed conduit and into the intake manifold of the internal combustion engine.

3. The internal combustion engine as set forth in claim 1 , wherein the non-return valve is spring-loaded.

4. An internal combustion engine as set forth in claim 1 , wherein the pre-chamber ignition fuel feed is completely blocked by the control valve.

5. The internal combustion engine as set forth in claim 1 , wherein the control device comprises an interface.

6. The internal combustion engine as set forth in claim 1 , wherein the control valve is arranged in the pre-chamber feed conduit downstream of the at least one valve.

7. The internal combustion engine as set forth in claim 6 , wherein the at least one valve is connected by way of a breather conduit to the intake manifold of the internal combustion engine.

8. The internal combustion engine as set forth in claim 1 , wherein the at least one pre-chamber is connected to the pre-chamber feed conduit by way of at least one respective pre-chamber valve.

9. The internal combustion engine as set forth in claim 8 , wherein the at least one pre-chamber valve is a passive non-return valve.

10. A method of operating an internal combustion engine comprising:
supplying an ignition fuel as a pre-chamber fuel feed to at least one pre-chamber via a pre-chamber conduit;
igniting a fuel in a main combustion chamber by ignition of the ignition fuel in the at least one pre-chamber;
reducing a pressure difference between the pre-chamber ignition fuel feed and the main combustion chamber via at least one valve arrange arranged in the pre-chamber feed conduit;
at least partially diverting the pre-chamber ignition fuel feed into an intake manifold as needed for pressure equalization by using a non-return valve arranged in the pre-chamber feed conduit; and
affecting a control valve via a control device operative based on a parameter characteristic of a change in a power produced by the internal combustion engine for the affected control valve to at least partially block the pre-chamber ignition fuel feed upon occurrence of the parameter characteristic of the change in the power produced by the internal combustion engine.

Assignees

• Ge Jenbacher Gmbh & Co Og

Inventors

• Graus Mario
• Lopez Francisco
• Schaumberger Herbert
• Spyra Nikolaus

Classifications

• F02B19/12

  with positive ignition (engines with non-timed positive ignition, and with incandescent chambers F02B9/08) · CPC title

• F02D41/3005

  Details not otherwise provided for · CPC title

• F02B19/10

  with fuel introduced partly into pre-combustion chamber, and partly into cylinder · CPC title

• F02M21/0275

  for in-cylinder direct injection, e.g. injector combined with spark plug · CPC title

• F02M21/0236

  Multi-way valves; Multiple valves forming a multi-way valve system · CPC title