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Method for smoothly connecting a load during an activated cylinder deactivation process of an internal combustion engine

A technology for internal combustion engines and transitions, applied in the characteristic fields of the preamble, which can solve the problems of poor running stability and speed fluctuations of internal combustion engines, achieve good running smoothness, avoid torque shocks, and prevent torque shocks

Active Publication Date: 2018-01-26
ROLLS ROYCE SOLUTIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the running smoothness of the internal combustion engine deteriorates and there is a possibility of speed fluctuations

Method used

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  • Method for smoothly connecting a load during an activated cylinder deactivation process of an internal combustion engine
  • Method for smoothly connecting a load during an activated cylinder deactivation process of an internal combustion engine
  • Method for smoothly connecting a load during an activated cylinder deactivation process of an internal combustion engine

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Embodiment Construction

[0027] figure 1 The internal combustion engine according to the invention is shown in a simplified plan view, having two cylinder bases 1 , 2 parallel to one another. Six cylinders denoted by A1 to A6 and B1 to B6 are provided in each of the cylinder bases 1 , 2 . exist figure 1 It can be seen in the illustration on the left of , that only three cylinders, namely cylinders B1 , B2 and B3 , are activated. During switching mode, six cylinders, ie cylinders A1 to A6 of cylinder base 1 , are subsequently activated. like in figure 1 All the cylinders A1 to A6 of the cylinder base 1 are deactivated in the left half of the figure, the cylinders of the cylinder base 2 are deactivated.

[0028] figure 2 A graph is shown in which time is plotted on the abscissa, while the ordinate describes the throttle valve position in percentage or the boost pressure in bar. The switching hysteresis when the cylinder is activated or deactivated with the lower limit UG on the left and the upper...

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Abstract

The invention relates to a method for operating an internal combustion engine, in particular a gas engine, comprising two cylinder banks (1, 2), each of which comprises multiple cylinders (A1 to A6, B1 to B6), wherein each cylinder bank (1, 2) is independently supplied with charging pressure, and comprising a device for actively deactivating at least one cylinder of each cylinder bank (1, 2). Theinvention is characterized in that when the operating state is switched from a state with at least one deactivated cylinder to an operating state with at least one other activated cylinder, the charging pressure is reduced prior to the activation of the other cylinder.

Description

technical field [0001] The invention relates to a method for shock-free load switching-on when an activated cylinder of an internal combustion engine is switched off. [0002] The invention relates in particular to a method according to the features of the preamble of claim 1 . Background technique [0003] When operating an internal combustion engine, in particular a gas motor, with a plurality of cylinders arranged in two cylinder blocks, it is known that in the lower characteristic map region, especially during idling, a cylinder cut-off is provided for fuel saving and for performance optimization . The cylinder cut-off also serves in particular to reduce harmful substances. Such cylinder cut-off is usually performed in petrol motors. [0004] By switching off individual cylinders, the remaining cylinders must generate the required power of the internal combustion engine. This results in a higher specific cylinder power of the active cylinder. In order to be able to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/00
CPCF02D17/02F02D41/0002F02D41/0082F02D41/0087F02D2250/21Y02T10/40
Inventor T.康拉德W.菲姆尔A.伯恩哈德
Owner ROLLS ROYCE SOLUTIONS GMBH