Method for operating a spark ignition internal combustion engine
A spark ignition type, internal combustion engine technology, applied in the direction of internal combustion piston engine, combustion engine, fuel heat treatment device, etc., to achieve the effect of high efficiency and low emission
Inactive Publication Date: 2019-07-19
GE JENBACHER
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
This of course has the disadvantage that it requires the use of a second fuel
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0037] As already established, the present invention allows the duration of combustion to be influenced by selecting the temperature of the cylinder charge.
[0038] By selecting a higher cylinder charge temperature, it is possible to reduce the combustion duration and thus produce less unburned hydrocarbons and CO, as well as achieve a higher efficiency of the internal combustion engine. Thus, the present invention combines low emissions with high efficiency.
[0039] In the following, the terms "duration of combustion" and "position of center of gravity" (of combustion) are used. The duration of combustion, ie the combustion duration, is a measure of the progress of combustion in the combustion cycle, expressed in terms of the mass fraction burned within a certain crankshaft angle. Therefore, Δθ for 15° crankshaft angle 0-10％ A combustion duration of , means, for example, that 10% of the charge mass is burned within 15° of crankshaft revolutions.
[0040] The position of ...
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A method for operating a spark ignited engine, including forming a combustible mixture by mixing generally homogeneously a first fuel and air and introducing this mixture into the at least one cylinder in an intake stroke, and compressing the combustible mixture with a piston in a compression stroke thereby introducing a part of the combustible mixture into a pre-chamber. During the intake and / or the compression stroke, a second fuel is introduced into the pre-chamber at an introduction-time before start of combustion, and the second fuel is of the same or different chemical composition and / or concentration with respect to the first fuel, and a spark ignites in the prechamber. An amount of second fuel and / or the chemical composition of second fuel introduced to the pre-chamber and / or spark timing of the pre-chamber and / or an in-cylinder charge temperature is chosen such that a desired duration of combustion can be achieved.
Description
technical field [0001] The invention relates to a method for operating a spark ignition internal combustion engine according to the invention and to a spark ignition internal combustion engine according to the invention. Background technique [0002] In the design of spark-ignition internal combustion engines, there is a conflict of objectives in reducing different types of emissions such as nitrogen oxides (NOx), unburned hydrocarbons (HC) and carbon monoxide (CO). [0003] A promising approach for combustion with high efficiency and low emissions is the so-called HCCI concept (English: Homogeneous Charge Compression Ignition, Homogeneous Charge Compression Ignition). Ignition of a highly dilute (ie lightly mixed and / or with high exhaust gas recirculation rate) and homogeneous fuel-air mixture takes place in the vicinity of top dead center during the compression stroke by a temperature increase. The strongly diluted fuel-air-mixture allows combustion with extremely low nit...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F02D41/30F02P5/15F02D21/08F02D41/00F02D19/02F02D19/06F02B29/04F02M31/20F02M31/083F02D37/02F02D13/02
CPCF02B19/12F02D19/08F02B29/0493F02D13/0223F02D19/02F02D19/0644F02D19/0647F02D21/08F02D37/02F02D41/0027F02D41/005F02D41/006F02D41/402F02D2200/02F02D2250/36F02D2250/38F02M31/083F02M31/205F02P5/15F02B1/02F02D19/0642F02D19/081F02D35/023F02D35/028F02D41/0025Y02T10/30Y02T10/40F02B19/1085F02D41/0077
Inventor F·格鲁贝尔N·施皮拉C·特拉普G·廷施曼E·穆苏P·克里斯蒂娜
Owner GE JENBACHER