Method and device for determining a vibration-optimised adjustment of an injection device
A technology of injection device and injection quantity, which is applied in the direction of fuel injection device, special fuel injection device, fuel injection control, etc., and can solve problems such as time-consuming adjustment
Inactive Publication Date: 2014-02-26
CONTINENTAL AUTOMOTIVE GMBH
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- Application Information
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Problems solved by technology
However, this requires a complex adjustment of each individual engine, which in each case depends on the subjective judgment of the person who adjusts the injection system
Method used
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Embodiment Construction
[0045] figure 1 The differential injection quantity dQ / dt for the cylinders of the internal combustion engine during the working cycle is shown as a function of time t plotted on the abscissa. An internal combustion engine is here and hereinafter each referred to as a V8 diesel engine with an injection system embodied as a common rail system. The invention described with the aid of this example can of course also be implemented for other engines, in particular gasoline engines.
[0046] exist figure 1 It can be seen in the SOI with injection time 1 Main Injection 1 and SOI with Injection Timing 2 The pilot injection 2 is realized earlier than the main injection by the time interval ΔSOI. Here, the injection time SOI 1 A time (SOI—start of injection) is defined in each case as the start of the respective individual injection, ie here main injection or pilot injection. Of course, instead the end of an individual injection can also be used to define the corresponding inje...
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In a method for determining a vibration-optimised adjustment of an injection device of an internal combustion engine, for each cycle of the internal combustion engine, a plurality of individual injections per cylinder is carried out by the injection device, each of which is defined by a relative injection moment and an individual injection quantity. A temporal course of a resulting pressure influenced by pressure waves is determined in a fuel guiding part, and the above-mentioned adjustment is determined by variation of the injection moment of at least one individual injection and / or the individual quantity, such that the adjustment is characterized by a temporal variation of the resulting pressure, which is reduced by an at least partially destructive interference between the cited pressure waves. A corresponding device can determine a vibration-optimised adjustment of an injection device, and an internal combustion engine may have such a device.
Description
technical field [0001] The invention relates to a method for determining an oscillation-optimized adjustment of an injection system of an internal combustion engine and a corresponding device for determining an oscillation-optimized adjustment of an injection system according to the preambles of the independent claims. The invention also relates to an internal combustion engine equipped with such a device. Background technique [0002] In this context, the invention relates to the adjustment of injection systems for internal combustion engines in which a plurality of individual injections of at least two individual injections per cylinder are provided for each cycle in a defined engine adjustment, wherein each individual injection is at least Defined by the injection timing and the individual injection quantities. In this case, the injection timing can be defined, for example, by a certain crankshaft position or a time offset relative to a defined point in the internal comb...
Claims
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IPC IPC(8): F02D41/38F02D41/40F02M63/00
CPCF02D2250/31F02D2041/1433Y02T10/44F02D2200/0604F02D41/402F02M2200/315F02D41/3809F02D2250/04F02D2200/0602Y02T10/40
Inventor O·洛贝D·斯特格曼F·博克塞纽斯J·弗里特希T·卡拉米吉斯C·韦诺尔德
Owner CONTINENTAL AUTOMOTIVE GMBH