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Method and apparatus for operating internal combustion engine with dual fuel injection

An internal combustion engine and fuel technology, which is applied in the direction of fuel injection control, internal combustion piston engine, combustion engine, etc., can solve problems such as the limitation of compression ratio knock tendency

Active Publication Date: 2017-08-22
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the maximum possible compression ratio is limited by the fuel's propensity to knock

Method used

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  • Method and apparatus for operating internal combustion engine with dual fuel injection
  • Method and apparatus for operating internal combustion engine with dual fuel injection
  • Method and apparatus for operating internal combustion engine with dual fuel injection

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Embodiment Construction

[0034] exist figure 1 The internal combustion engine shown in has four cylinder blocks 11 which are covered by cylinder heads 12 . The cylinder head 12 delimits a combustion chamber 13 in each cylinder block 11 together with a reciprocating piston guided in the cylinder block 11 , not shown here, which has an inlet 15 controlled by an inlet valve 14 . The inlet 15 forms a junction of a feed channel 16 through the cylinder head 12 .

[0035] The fuel injection system shown comprises an air flow path 18 for supplying combustion air to the combustion chamber 13 of the cylinder block 11 , which has flow channels separated from one another at the end sides to the individual feed channels 16 17. In addition, a first group of fuel injection valves 19 that inject fuel directly into each of the combustion chambers 13 of the cylinder block 11 and a second group of fuel injection valves 20 that inject fuel into the flow passage 17 are provided.

[0036] The fuel injection valves of t...

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Abstract

The invention relates to a method and an apparatus for operating an internal combustion engine, the internal combustion engine having dual fuel supply based on an intake pipe and direct fuel supply, wherein the fuel quantity required in the fuel supply based on the intake pipe and in the direct fuel supply are calculated by quantity distribution. The internal combustion engine also has a variable compression of the fuel / air mixture in at least one combustion chamber of the internal combustion engine, wherein it is particularly specified to detect the current operating conditions of the (405, 410) internal combustion engine, including the current compression (405), and determine (420) the value assigned to the quantity associated with the detected operating condition.

Description

technical field [0001] The invention relates to a method and a device for operating an internal combustion engine with a double fuel distribution and variable compression of a fuel / air mixture in a combustion chamber. The subject of the invention is also a computer program, a machine-readable data carrier for storing the computer program, and an electronic controller by means of which the method according to the invention can be carried out. Background technique [0002] In the dual fuel distribution mentioned here, intake manifold injection and direct injection are coupled or run in parallel in the fuel distribution of the internal combustion engine. It is known from practice that such internal combustion engines can be configured as a dual system, in which mixed operation the fuel can be distributed in parallel by means of intake manifold injection (SRE) and by means of fuel or fuel direct injection (BDE) Delivery to the cylinder block of the internal combustion engine. ...

Claims

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Application Information

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IPC IPC(8): F02D41/30
CPCF02D41/3094F02D41/345F02D35/027F02D2700/03Y02T10/40
Inventor C.旺德林R.埃克尔T.库恩T.霍尔曼U.舒尔茨
Owner ROBERT BOSCH GMBH
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