Method for operating an internal combustion engine

Patent metadata

Field	Value
Publication number	US-2016369707-A1
Application number	US-201415122196-A
Country	US
Kind code	A1
Filing date	Dec 11, 2014
Priority date	Mar 27, 2014
Publication date	Dec 22, 2016
Grant date	—

Abstract

The invention relates to a method for operating an internal combustion engine with varying speed comprising at least one cylinder. Said internal combustion engine comprises different adjusting devices for influencing the filing of the cylinder, that is, at least one peripheral adjusting device and at least one adjusting device which is close to the cylinder. According to the invention, the various adjusting devices are adjusted unevenly when changing the engine speed.

First claim

1 - 10 . (canceled)

11 . A method for operating an internal combustion engine comprising at least one cylinder with a changing speed, with the internal combustion engine comprising different adjustment devices for influencing the filling of the at least one cylinder, namely at least one peripheral adjustment device and at least one near-cylinder adjustment device, and where, in case of a change of speed, the various adjustment devices being adjusted in differently acting fashions.

12 . A method as recited in claim 11 , wherein a throttle flap is provided as the peripheral adjustment device and a camshaft adjuster as the near-cylinder adjustment device.

13 . A method as recited in claim 12 , wherein the speed of the internal combustion engine is reduced, with the peripheral adjustment device being adjusted in reference to the near-cylinder adjustment device to a higher cylinder filling.

14 . A method as recited in claim 12 , wherein by the near-cylinder adjustment device an inlet valve of the internal combustion engine is adjusted, which is equivalent to an angular value of the crankshaft of the internal combustion engine, which deviates by at least 20° from the lower dead center of the charge change of the internal combustion engine.

15 . A method as recited in claim 14 , wherein the speed is reduced to a value below the idling speed of the internal combustion engine with, before a speed limit is reached up to which an automatic re-acceleration of the internal combustion engine is still possible, the near-cylinder adjustment device being adjusted in the direction of a higher cylinder filling.

16 . A method as recited in claim 15 , wherein at a speed below the idling speed a restart signals triggers an adjustment of the near-cylinder device in the direction towards increased cylinder filling.

17 . A method as recited in claim 16 , wherein during the re-acceleration of the internal combustion engine, before the idling speed is reached, the near-cylinder adjustment device is adjusted from a first setting to a second setting, with the adjustment range of the near-cylinder adjustment device available being used by at least one fourth.

18 . A method as recited in claim 17 , wherein each of the first and second settings differ more strongly from the other adjustment position than from an extreme position of the adjustment device most closely resembling the respective setting.

19 . A method as recited in claim 15 , wherein after the idling speed has fallen short the near-cylinder adjustment device is adjusted to a low cylinder filling.

20 . A control unit for an internal combustion engine, embodied to execute the method as recited in claim 11 .

Assignees

• Schaeffler Technologies Ag

Inventors

• Schaefer Jens
• Thoelke Andreas

Classifications

• F01L1/34

  characterised by the provision of means for changing the timing of the valves without changing the duration of opening {and without affecting the magnitude of the valve lift} · CPC title

• F02D41/08

  for idling (F02D41/06, F02D41/16 take precedence) · CPC title

• F02D13/0223 Primary

  Variable control of the intake valves only · CPC title

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F02B29/08

  Modifying distribution valve timing for charging purposes (F02B29/06 takes precedence) · CPC title