Method for operating an internal combustion engine

An internal combustion engine, pressure technology, applied in combustion engines, mechanical equipment, fuel injection pumps, etc., can solve problems such as pressure overrun and pressure deviation, and achieve the effect of reducing component load, avoiding pressure deviation, and low computing power

Active Publication Date: 2016-11-16
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It is also known that pressure overruns or negative excesses can occur in the above-mentioned regulation, which are considered as undesired pressure deviations
It is also known that hydraulically induced delayed closing times of high pressure pumps can lead to undesired pressure deviations

Method used

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  • Method for operating an internal combustion engine
  • Method for operating an internal combustion engine
  • Method for operating an internal combustion engine

Examples

Experimental program
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Embodiment Construction

[0021] figure 1 A fuel injection system 1 of an internal combustion engine is shown in a very simplified view. The fuel tank 9 is connected to a (not specified) high-pressure pump 3 via a feed line 4 , a prefeed pump 5 and a low-pressure line 7 . A high-pressure accumulator 13 (“common rail”) is connected to the high-pressure pump 3 via a high-pressure line 11 . A metering unit 14 with an actuating device 15 —referred to below as ZME—is arranged hydraulically in the line of the low-pressure line 7 between the prefeed pump 5 and the high-pressure pump 3 . Other elements, such as the valves of the high-pressure pump 3 figure 1 not shown in It is obvious that the ZME14 can be designed as a structural unit with a high-pressure pump 3 . For example, the inlet valve of the high-pressure pump 3 can be forcibly opened via the ZME 14 .

[0022] During operation of the fuel injection system 1 , the prefeed pump 5 feeds fuel from the fuel tank 9 into the low-pressure line 7 , while ...

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Abstract

The invention relates to a method for operating an internal combustion engine, in particular for avoiding undesired pressure deviations. A pressure rating (108) is obtained according to the driver's will. The pressure actual value (110) is compared with the pressure nominal value (108). The resulting conditioning signal (106) is input to the controlled system (44). The actual pressure value ( 110 ) is obtained from the controlled system ( 44 ). Changes in driver intentions are identified. A pressure correction value ( 104 ) is obtained as a result of the change in driver preference. The adjustment signal (106) is varied according to a pressure correction value (104).

Description

technical field [0001] The invention relates to a method for operating an internal combustion engine according to the preamble of claim 1 . Background technique [0002] It is known that the pressure must be adjusted for operation of internal combustion engines. Examples of this include regulating the fuel pressure in the high-pressure accumulator of the internal combustion engine or the intake air pressure or boost pressure in the intake tract downstream of the compressor and before entering the internal combustion engine. [0003] It is also known that pressure overruns or negative excesses can occur in the above-mentioned regulation, which are considered to be undesired pressure deviations. It is also known that a hydraulically induced delay in the closing time of the high-pressure pump can lead to undesired pressure deviations. Contents of the invention [0004] The technical problem underlying the invention is solved by a method according to claim 1 . Advantageous ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): F02D41/38
CPCF02B37/16F02D41/3872F02D2041/141F02D2200/0602F02D2200/602F02D2250/04F02M59/366
InventorC.A.明尼希T.沃科克T.希伦布兰德
OwnerROBERT BOSCH GMBH