SU1236140A1 - Electromagnetic nozzle - Google Patents

Description

FIELD OF THE INVENTION The invention relates to a motor construction for use in fuel equipment with an electromagnetic drive.

The purpose of the invention is to improve the process of adjusting the volumetric flow rate of the fuel depending on the mode of operation of the engine.

The drawing shows a schematic diagram of an electromagnetic nozzle.

The nozzle includes a housing 1 with a spray gun 2 fixed on it with two groups of spray holes 3 and 4, at least two locking bodies made in the form of a hollow outer 5 and the inner 6 needles located in it, two return springs 7 and 8 of the latter and an electromagnetic actuator . Electromagnetic drive of a hollow needle 5 includes an electromagnet 9 and measles 10, and an internal needle 6, respectively, an electromagnet 11 and measles 12.

The nozzle works as follows.

Fuel under constant pressure is supplied to the inner cavity of the nozzle. In the absence of electric current in the coils of electromagnets 9 and 11, the springs 7 and 8 hold the locking needles 5 and 6 in the closed position, fuel injection is not performed.

When the engine is operating at low loads, the control current pulses are applied to the electromagnet 11, the bark 12 of which is held together with the inner needle 6, moves, the needle opens the way for the fuel through a group of spray openings 4, fuel is injected. Continue. The injection rate is set by the duration of the current pulse Hvi for fenleni. By eye | :; | H 1 and impulse needle 6 iio., Action 8 lowered, compartment feed.

At medium loads, control current pulses are applied to an electromagnet 9, the bark of which is 10 mixed, opening an external hollow needle 5, opening the path for the fuel to the group of spray holes 3, the total flow area of which is chosen more than the cross section of the group of holes 4. The fuel flows at a higher volumetric rate. At the end of the pulse, the needle 5 is also lowered by the action of the spring 7, stopping the injection.

In the engine operation mode with loads that are much higher than average and at maximum, the control current pulses are applied to both electromagnets 9 and 11, the needles and 6 are raised, the injection takes place (h

 both groups of spraying orifices: j i: 4. A change in the phase of occurrence and decay of the control pulses is carried out. 1 -. control of the differential feed form

Thus, the independent control of the needles with the help of individual electromagnetic actuators allows realizing three levels of control of the fuel injection flow rate by selection; groups of spraying orifices, and controlling the phase of the current pulses on both electromagnets makes it possible to additionally control the shape of the transfer characteristic of the loads and large loads. The control of volumetric fuel injection volume reduction achieved by FP |)

- 1 to 6 strodeystviyu elektromagmforsu1: 1K in the implementation of small. expands the duration of the crankshaft by rotation angle of the crankshaft 1n modes, which reduces the gesture-. worker.

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Claims (1)

ELECTROMAGNETIC INJECTOR for a diesel engine, comprising a housing fixed to it. a sprayer with two groups of sawing holes, at least two locking bodies made in the form of a hollow outer needle and an inner needle located in it, two return springs of the latter and an electromagnetic drive, characterized in that, in order to improve the process of controlling the volumetric rate of fuel supply, depending from the operating mode of the engine, the electromagnetic drive is made up of individual electromagnetic drives for each needle. to; ss O) o ί