METHOD AND DEVICE FOR DETERMINING A VIBRATION-OPTIMISED ADJUSTMENT OF AN INJECTION DEVICE
First Claim
1. A method of determining a vibration-optimized adjustment of an injection device of an internal combustion engine, the method comprising the step of:
- providing for a specific engine adjustment by the injection device for each cycle of the internal combustion engine a plurality of at least two individual injections per cylinder, each of which is defined at least by a relative injection instant and an individual injection quantity,wherein a time characteristic of a resulting pressure that is influenced by pressure waves caused by the individual injections is determined in a fuel-carrying part of the injection device, wherein said adjustment is determined by varying the injection instant of at least one of;
at least one individual injection and an individual injection quantity of at least one individual injection in such a way that this adjustment is characterized by a reduced temporal fluctuation of the resulting pressure as a result of at least partially destructive interferences between said pressure waves.
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Accused Products
Abstract
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 characterised 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.
35 Citations
20 Claims
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1. A method of determining a vibration-optimized adjustment of an injection device of an internal combustion engine, the method comprising the step of:
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providing for a specific engine adjustment by the injection device for each cycle of the internal combustion engine a plurality of at least two individual injections per cylinder, each of which is defined at least by a relative injection instant and an individual injection quantity, wherein a time characteristic of a resulting pressure that is influenced by pressure waves caused by the individual injections is determined in a fuel-carrying part of the injection device, wherein said adjustment is determined by varying the injection instant of at least one of;
at least one individual injection and an individual injection quantity of at least one individual injection in such a way that this adjustment is characterized by a reduced temporal fluctuation of the resulting pressure as a result of at least partially destructive interferences between said pressure waves.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification