Internal combustion engine and method of operating the internal combustion engine

An internal combustion engine, operating state technology, applied in the direction of internal combustion piston engine, combustion engine, machine/engine, etc., to achieve the effect of high efficiency conversion and low emission

Active Publication Date: 2021-03-30
VOLKSWAGEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the known method has the disadvantage that simply adjusting the compression ratio does not bring the internal combustion engine into optimum operating conditions

Method used

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  • Internal combustion engine and method of operating the internal combustion engine
  • Internal combustion engine and method of operating the internal combustion engine
  • Internal combustion engine and method of operating the internal combustion engine

Examples

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Embodiment Construction

[0027] figure 1An internal combustion engine 10 according to the invention is shown schematically. The internal combustion engine 10 has an engine block 12 and a cylinder head 14 connected to the engine block 12 , wherein a piston 18 is arranged in a cylinder bore of the engine block 12 and is connected to a crankshaft 58 via a connecting rod 34 . The cylinder bore represents a cylinder wall 38 on which the piston 18 is guided in a known manner by means of piston rings. Piston 18 and cylinder head 14 delimit combustion chamber 16 of internal combustion engine 10 . In addition, intake and exhaust ducts are formed in the cylinder head 14 for the gas exchange of the combustion chamber 16 , wherein the respective ducts can be closed by means of an intake valve 40 or an exhaust valve 42 to flow into or out of the combustion chamber 16 temporarily interrupted. To open the intake valve 40 , an intake camshaft 54 ​​is provided, the cams of which press the intake valve 40 in the dir...

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Abstract

The invention relates to an internal combustion engine for driving a motor vehicle. The internal combustion engine has an engine block and a cylinder head connected to the engine block. In the internal combustion engine, at least one combustion chamber is formed in which a piston connected to a crankshaft via a connecting rod is displaceable and compresses a combustion air mixture. At least one fuel injector with a fuel injection nozzle, via which fuel can be injected into the combustion chamber of the internal combustion engine, is arranged on the cylinder head. In this case, the fuel injection nozzle has a plurality of injection openings which are arranged on a first bolt circle and a second bolt circle of the fuel injection nozzle. The invention further relates to a method for operatingsuch an internal combustion engine, wherein the internal combustion engine in a first operating state at low load with a high compression ratio is operated and exclusively through the injection openings on the first bolt circle of Fuel injector fuel is injected into the combustion chamber, and wherein the internal combustion engine in a second operating state at high load with a low compression ratio is operated, wherein through the injection openings of both bolt circles fuel is injected into the combustion chamber.

Description

technical field [0001] The invention relates to an internal combustion engine and a method of operating an internal combustion engine. Background technique [0002] The compression ratio of modern internal combustion engines, especially diesel engines with direct fuel injection, has a decisive influence on the efficiency and emissions of the internal combustion engine. Furthermore, the cold start behavior and the heating of exhaust gas aftertreatment components depend on the compression ratio of the internal combustion engine. The compression ratio in internal combustion engines with a constant compression ratio known from the prior art is therefore always a compromise between different requirements. [0003] Furthermore, internal combustion engines are known which have a variable compression ratio, in which the compression ratio can be adapted to the operating state of the internal combustion engine. From the patent document WO 2016 / 016 194 A1 an internal combustion engin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D15/04F02B75/04F02M61/18F02M45/08F02B3/12
CPCF02B3/12F02B75/045F02D15/04F02M45/08F02M61/1806F02M61/182F02M61/1826F02M61/1846F02B23/0669F02B75/04F02D15/02F02D41/0255F02D41/064F02D41/38F02D2041/389F02D2200/021F02M61/1813Y02T10/12
Inventor S.凯尔纳A.赫鲁嫩代克E.波特
Owner VOLKSWAGEN AG
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