RU2000464C1 - High-speed diesel engine spray tip - Google Patents

Abstract

Usage: in particular, in the fuel equipment of a diesel engine. The inventive nozzle contains a housing with a locking cone, a channel for supplying fuel, a needle forming a needle volume with the housing, and a sawing hole made in the form of a branched channel with holes having two input edges and one output edge, with one input edge located on the locking cone of the body, and the other in the game room. 1 s.p. f-ly, 3 ill.

Description

The invention relates to the field of mechanical engineering and can be used in engine building.

Known atomizer nozzles for diesel engines comprising a housing, a locking needle, a needle room coaxial with a locking needle, and at least one spray opening, the inlet edge of which is located in the needle room.

However, such nebulizers do not optimize mixture formation in a wide range of diesel operating modes, which reduces the efficiency of the injection process.

Also known is a spray gun selected as a prototype, comprising a housing made with a locking cone, a well and at least two spraying channels, a needle interacting with the locking cone, while the input of the first channel is located on the locking

case, and the output of the second channel is communicated with the first channel.

A nozzle with such a sprayer has the best characteristics. However, two locking needles are provided in the atomizer, controlling separately the fuel supply through two channels, which significantly complicates the design. In addition, the outlet edges are located on the locking surface of the cone, which makes the injection less effective in controlling the direction of the fuel jets.

The purpose of the invention is to increase the injection efficiency due to the possibility of changing the direction of the fuel jets during the injection process.

The goal is achieved. that in a high-speed diesel atomizer containing a housing with a locking cone, a well and at least two cutting channels, a needle, size / and

with

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4 about 4

ABOUT

which can be interacted with the locking cone, the input of the first channel being located on the locking cone, and the output of the second channel in communication with the first channel, according to the invention, the input of the second channel in communication with the well.

Figure 1 shows a longitudinal section of the proposed spray; figure 2 - node I in figure 1; Fig. 3 is a diagram of a fuel injection process and a diesel combustion chamber.

The high-speed diesel atomizer comprises a housing 1 with a locking cone 2, a well 3 and at least two sawing channels 4 and 5, a needle b placed in the housing 1 with the possibility of interaction with the locking cone 2, while the input of the first channel 4 is located on the locking cone 2 and the output of the second channel 5 is in communication with the first channel 4, and the input 7 of the second channel is in communication with the well 3. In the housing 1, a channel 8 for supplying fuel and a cavity 9 of the atomizer are made. At the outlet of the spraying channels 4 and 5, the formation of fuel jets of different positions 10. 11 and 12 is possible.

Spray high-speed diesel operates as follows. In operating conditions, fuel is pumped (not shown) through a channel 8 into the internal cavity 9 of the atomizer. The pressure rises and the needle 6 rises, allowing fuel to access the spray channels 4 and 5.

In start-up and idle modes, when the needle 6 makes a partial rise, the flow coefficient of channel 4 is much smaller than channel 5. As a result, the bulk of the fuel enters through

channel 5 and fuel injection occurs in the central part of the combustion chamber (stream 10 in FIG. 3) with a higher temperature, providing good ignition and starting qualities of the diesel engine. With an increase in load, needle 6 makes a greater rise than in start and idle modes. The flow coefficients of the spraying channels 4 and 5 and the stream are aligned.

the fuel resulting from the interaction of the two streams moves to the axis of the nozzle (jets 11 and 12 in FIG. 3), ensuring full use of the volume of the combustion chamber and high quality

mixture formation and diesel duty cycle. The geometric ratios of channels 4 and 5 and their angular location are specified in the process of fine-tuning a particular diesel model.

Thus, the input of the second sawing channel in communication with the nozzle well allows changing the direction of the fuel jets and, as a result, increasing the efficiency of the injection process.

Claims (1)

Formula and inventions A high-speed diesel atomizer comprising a housing with a locking cone and a well and at least two spraying channels, a needle placed in the housing to interact with the locking cone, the input of the first channel being located on the locking cone, and the output of the second channel communicating with the first channel, characterized in that, in order to increase injection efficiency, the input of the second channel is in communication with the well. 7 2 / 7 Figure 1 6 L Editor N. Tsalikhina Compiled by V. Malchuk Tehred M. Morgenthal tfk / zJ Proofreader S. Patrusheva