METHOD OF REGULATING AN INTERNAL COMBUSTION ENGINE

• US 20150354471A1
• Filed: 06/02/2015
• Published: 12/10/2015
• Est. Priority Date: 06/04/2014
• Status: Active Grant

• Current Assignee: INNIO Jenbacher GmbH & Co.,OG.
• Original Assignee: GE Jenbacher GmbH & Company OHG (General Electric Company)
• Inventors: KOPECEK, Herbert, SPYRA, Nikolaus, WALDHART, Michael
• Granted Patent: US 10,385,787 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F02B 2075/1848 twelve
• CPC Class Codes: F02B 2075/1868 twenty
• CPC Class Codes: F02D 17/02 Cutting-out cutting-out engines in multiple engine arrangements F02D25/04
• CPC Class Codes: F02D 2250/18 Control of the engine output torque
• CPC Class Codes: F02D 41/008 Controlling each cylinder individually
• CPC Class Codes: F02D 41/0087 Selective cylinder activation, i.e. partial cylinder operation deceleration cut-off F02D41/123

Abstract

A method of regulating an internal combustion engine (1) having more than one cylinder (2), wherein individual cylinders (2) can be deactivated in accordance with a predeterminable pattern in dependence on the required power output, wherein the pattern comprises a time sequence of commands for ignition and commands for skipping ignition, wherein the pattern is derived with a calculation specification in such a way that the spacing between cylinders (2) intended for skipping in relation to the firing order is an odd number and preferably in coprime relationship with the number of cylinders.

Claims

1. A method of regulating an internal combustion engine having more than one cylinder, wherein individual cylinders can be deactivated in accordance with a predeterminable pattern in dependence on the required power output, wherein the pattern comprises a time sequence of commands for ignition and commands for skipping ignition, wherein the pattern is derived with a calculation specification in such a way that the spacing between cylinders intended for skipping in relation to the firing order is an odd number and preferably in coprime relationship with the number of cylinders.

2. A method as set forth in claim 1, wherein the pattern is described by way of an algorithm in dependence on the number of cylinders.

3. A method as set forth in claim 1, wherein the pattern is derived by way of an algorithm from the firing order in such a way that the commands for ignition are distributed uniformly to the cylinder banks.

4. A method as set forth in claim 1 wherein the pattern can be written as a list of commands for ignition followed by commands for non-ignition, wherein the pattern can be altered in respect of time such that after a predeterminable time interval there is added to a predeterminable list position with a command for ignition a number of at least one further list position with a signal for ignition and the list portion with commands for non-ignition is supplemented by the same number of list positions with signals for non-ignition.

5. A method as set forth in claim 1, wherein the pattern is altered after a predeterminable time interval, wherein the time interval is between 1 and 20 seconds, particularly preferably being 5-10 seconds.

6. A method as set forth in claim 1, wherein the variation in respect of time of the pattern takes place such that as few cylinders as possible, particularly preferably only one cylinder, change over from an unfired to a fired state and as few cylinders as possible change over from a fired to an unfired state.

7. A method as set forth in claim 1, wherein at least one cylinder remains excluded from cylinder deactivation.

8. A method as set forth in claim 1, wherein the pattern can be altered in respect of time such that upon an increased power demand the list block with commands for ignition is prolonged by at least one further command for ignition.

9. A method as set forth in claim 1, wherein the pattern can be altered in respect of time such that upon an reduced power demand the list block with commands for ignition skipping is prolonged by at least one further command for ignition skipping.