Internal combustion engine with sub-combustion chamber

Abstract

To provide an internal combustion engine with an auxiliary combustion chamber capable of more reliably introducing fuel into an auxiliary combustion chamber.SOLUTION: An internal combustion engine comprises a main combustion chamber 41 provided in a cylinder 30, an auxiliary combustion chamber 43 partitioned by a partition wall 42 in the main combustion chamber 41 and having a plurality of communicating passages 60 formed therein, and a first injector 71 (first fuel injection device) and a second injector 72 (second fuel injection device) that are provided in the main combustion chamber 41 and inject fuel toward the auxiliary combustion chamber 43, where the first injector 71 and the second injector 72 are arranged opposite each other along a straight line L2 passing through a center 43o of the auxiliary combustion chamber 43 when viewed from an axial direction of the cylinder 30.SELECTED DRAWING: Figure 6

Claims

1. The main combustion chamber located in the cylinder, A sub-combustion chamber is partitioned within the main combustion chamber by a partition wall and is provided with a plurality of connecting passages that communicate with the main combustion chamber, A first fuel injector and a second fuel injector are provided in the main combustion chamber and inject fuel toward the sub-combustion chamber. Equipped with, The first fuel injection device and the second fuel injection device are arranged opposite to each other along a straight line that passes through the center of the sub-combustion chamber when viewed from the axial direction of the cylinder. The injection range of the second fuel injector, as viewed from the axial direction, is wider than that of the first fuel injector, as viewed from the axial direction. An internal combustion engine with a secondary combustion chamber.

2. The internal combustion engine with a sub-combustion chamber according to claim 1, wherein the second fuel injection device includes first injection nozzles arranged on both sides of the straight line when viewed from the axial direction.

3. The plurality of connecting passages include connecting passages formed on the side of the partition wall facing the second fuel injector, The second fuel injection device includes a second injection nozzle positioned between the first injection nozzles when viewed from the axial direction. An internal combustion engine with a sub-combustion chamber as described in claim 2.

4. The partition wall is formed in a dome shape, including a top and side portions extending from the top. The plurality of connecting passages include the connecting passage formed at the top, The injection range of the second fuel injector includes the top side of the partition wall. An internal combustion engine with a sub-combustion chamber according to any one of claims 1 to 3.

5. The plurality of connecting passages include a first connecting passage formed on the side portion and a second connecting passage formed on the top portion. The internal combustion engine with a sub-combustion chamber according to claim 4, wherein the injection range toward the top of the second fuel injector is set such that its centerline is located between the first and second communication passages.

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