Air-compressing injection internal combustion engine with auxiliary chamber

#The present invention relates to an air-compressing injection internal combustion engine with a main combustion space arranged in the piston and with an auxiliary chamber in continuous communication with the main combustion space by way of a channel-shaped constriction or narrow place, which includes an injection nozzle and a glow plug.

#The two-stage combustion systems known as pre-chamber or vortex chamber processes entail specific disadvantages. With the vortex chamber process the soot emission in the partial load range can be kept very low by the massive air swirl in the chamber and the intensive air-feed to the fuel conditioned thereby; however, at full load the air in the combustion space will be utilized only poorly--conditioned by the strongly eccentric arrangement of the vortex chamber, necessary by reason of the valves, and its firing channel, by the insufficient seizing of the main combustion space air resulting therefrom and finally by the long combustion paths--which means that the average pressure yield is limited by prematurely reaching the smoke limit.

#With the prechamber process, the conditions are the reverse, namely, a poor smoke-producing combustion in the partial load range, but a good seizing of the main combustion space air by the concentric arrangement of the prechamber and the multi-aperture construction. As a result thereof, the average pressure becomes higher at which one can drive at the smoke limit.

#These and other objects, features and advantages of the present invention will become more apparent from the following description when taken in connection with the accompanying drawing which shows, for purposes of illustration only, several embodiments in accordance with the present invention and wherein:

#FIG. 1 is a partial cross-sectional view through an injection type air-compressing internal combustion engine with an auxiliary chamber disposed substantially coaxially to the cylinder axis in accordance with the present invention;

#FIG. 2 is a partial cross-sectional view, similar to FIG. 1, through an injection-type air-compressing internal combustion engine in which the impact pin is disposed underneath the glow plug in accordance with the present invention; and

#Referring now to the drawing wherein like reference numerals are used throughout the various views to designate like parts, an auxilairy chamber generally designated by reference numeral 2 is arranged in the cylinder head 1 of an air-compressing injection internal combustion engine according to FIGS. 1 to 3, which is in communication by way of a channel-shaped constriction or narrow place 3, i.e., by way of a so-called burner throat, with the main combustion space 5 disposed in the piston top 4.

#The auxiliary chamber 2 is provided with a pressure chamber 6 in which terminate an injection nozzle 7 and a glow plug 8.

#The injection nozzle 7 and the constricted place 3 are coaxially disposed opposite one another, whereby the pressure chamber 6 is arranged eccentrically to both the axis 9 of the injection nozzle 7 and to the axis 10 of the burner throat 3.