Method for operating an internal combustion engine having an injection system, injection system designed to carry out a method of this type, and internal combustion engine having an injection system of this type

A technology of internal combustion engine and operation type, which is applied in the direction of charging system, mechanical equipment, machine/engine, etc., and can solve problems such as deterioration of emission characteristics

Active Publication Date: 2020-04-21
ROLLS ROYCE SOLUTIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this rapid and somewhat sudden reduction of the target volume flow leads (in particular again due to the inertia of the high-pressure control) to a sudden increase in the high pressure in the high-pressure accumulator, whereby the internal combustion engine can be subjected to an impermissibly high load. , and wherein the emission characteristics of the internal combustion engine can also be significantly deteriorated due to a currently large deviation of the actual high pressure from the theoretical high pressure

Method used

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  • Method for operating an internal combustion engine having an injection system, injection system designed to carry out a method of this type, and internal combustion engine having an injection system of this type
  • Method for operating an internal combustion engine having an injection system, injection system designed to carry out a method of this type, and internal combustion engine having an injection system of this type
  • Method for operating an internal combustion engine having an injection system, injection system designed to carry out a method of this type, and internal combustion engine having an injection system of this type

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Embodiment Construction

[0036] figure 1 A schematic representation of an exemplary embodiment of an internal combustion engine 1 with an injection system 3 is shown. The injection system is preferably designed as a common rail injection system. The injection system has a low-pressure pump 5 for delivering fuel from a fuel store 7 , an adjustable, low-pressure-side suction throttle 9 for influencing the fuel volume flow through the suction throttle 9 , with A high-pressure pump 11 for delivering fuel under increased pressure into a high-pressure accumulator 13 , a high-pressure accumulator 13 for storing fuel, and a plurality of injectors 15 for injecting fuel into a combustion space 16 of the internal combustion engine 1 . Alternatively, it is possible to implement the injection system 3 with a single accumulator, wherein then, for example, the individual accumulator 17 is integrated into the injector 15 as an additional buffer volume. A first, in particular electrically actuatable, high-pressure-s...

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Abstract

The invention relates to a method for operating an internal combustion engine (1) having an injection system (3) which has a high-pressure accumulator (13), high pressure in the high-pressure accumulator (13) being controlled via a suction throttle (9) on the low-pressure side, acting as a first pressure control element in a first high-pressure control loop (25). During normal operation, a high-pressure disturbance variable is produced by means of a pressure regulating valve (19, 20) on the high-pressure side, acting as an additional pressure control element, via which fuel is re-directed fromthe high-pressure accumulator (13) into a fuel reservoir (7), the at least one pressure regulating valve (19, 20) being controlled, during normal operation, on the basis of a set volumetric flow rate(Vs) for the fuel to be re-directed. According to the invention, a temporal development of the set volumetric rate (Vs) is sensed and the set volumetric flow rate (Vs) is filtered, a time constant (Tv) for the filtering of the set volumetric flow rate (Vs) being selected as a function of the sensed temporal development.

Description

technical field [0001] The invention relates to a method for operating an internal combustion engine, an injection system for an internal combustion engine, which is designed to carry out such a method, and an internal combustion engine with such an injection system. Background technique [0002] A method for operating an internal combustion engine with an injection system is known from German patent document DE 10 2014 213 648 B3, wherein the injection system has a high-pressure accumulator, and wherein the high pressure in the high-pressure accumulator is passed through as a first pressure regulator The suction throttle on the low-pressure side of the calibration unit is regulated in the first high-pressure regulating circuit. In normal operation, the high-pressure disturbance variable is generated via a pressure control valve on the high-pressure side, which serves as a second pressure control unit, wherein the fuel is regulated from the high-pressure accumulator via the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/38F02M63/02F02D41/14
CPCF02D41/3845F02D41/3863F02M63/025F02D2041/1422F02D2041/1432F02D41/1401F02D41/3854F02D2041/1431
Inventor A.德尔克
Owner ROLLS ROYCE SOLUTIONS GMBH
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