3results about How to "Improve combustion" patented technology

The present invention relates to the technical field of internal combustion engines. Disclosed are a method for controlling a combustion system, a combustion system, and an internal combustion engine. The combustion system comprises a piston, a fuel injector, and a cylinder. At a main fuel injection stage, the fuel injector injects a main fuel into the cylinder in sequence to drive the piston to work. The method for controlling the combustion system comprises: controlling the fuel injector to execute a first-stage main fuel injection in a compression stroke, wherein the first-stage main fuel injection comprises at least one injection, and continues till a power stroke such that the cylinder pressure in the cylinder reaches a target pressure peak value; and before the cylinder pressure in the cylinder reaches a descending critical point, executing a second-stage main fuel injection, wherein the second-stage main fuel injection comprises at least one injection, and the fuel injected in the second-stage main fuel injection and the fuel injected in the first-stage main fuel injection are superimposed such that the cylinder pressure in the cylinder is maintained at the target pressure peak value for a preset time. Therefore, the superposition of entrainment effects is promoted, a mixing area of the fuel and air is increased, and the air utilization rate is improved.

The utility model discloses a clean coke oven vertical flue that can uniformly diffuse combustion, and the carbonization chamber is located between two adjacent carbonization chamber main walls, the vertical flue is arranged in the carbonization chamber main wall along the height direction, the inner wall surface of vertical flue is provided with flue spiral wing, the cavity of vertical flue is provided with air supply tower, the outer tower surface of air supply tower is provided with air tower spiral wing, and the air supply hole is arranged between the adjacent two air tower spiral wings, the air supply channel is further arranged in the air supply, and the air supply channel is connected with the cavity of vertical flue through the air supply hole. The air tower spiral wing of air supply tower spirally surrounds the tower body, and the flue spiral wing spirally surrounds the inner wall surface of vertical flue. The air tower spiral wind channel formed by the air tower spiral wing on the air supply tower corresponds to the flue spiral wind channel formed by the flue spiral wing in the vertical flue. The spiral lift of air tower spiral wind channel is equal to the spiral lift of flue spiral wind channel. The clean coke oven vertical flue can effectively inhibit the generation of nitrogen oxide and reduce the floor area of coke oven.

In a gas generator, a plurality of gas discharge ports include a first gas discharge port and a second gas discharge port having an opening pressure higher than the first gas discharge port, a surrounding wall portion is divided, in a circumferential direction of the surrounding wall portion, into a combustion product discharge region in which one communication hole is disposed or a plurality of communication holes are collectively disposed and a combustion product non-discharge region that is a region of the surrounding wall portion other than the combustion product discharge region, a peripheral wall portion is divided, in a circumferential direction of the peripheral wall portion, into a communication hole-associated region associated with the combustion product discharge region and a communication hole non-associated region associated with the combustion product non-discharge region, the first gas discharge port is formed only in the communication hole-associated region, and the second gas discharge port is formed only in the communication hole non-associated region.