SU941655A1 - Device for regulating multi-cylinder diesel - Google Patents

Description

(54) DEVICE FOR REGULATING MULTICYLINDER DIESEL

one

This invention relates to the automatic regulation of internal combustion engines.

Devices for controlling multi-cylinder diesel engines are known, comprising at least two cylinder groups with inlet receivers and exhaust manifolds, a high-pressure fuel pump with a metering unit, nozzles, connected high-pressure pipelines with pumps, a fuel supply shut-off mechanism and an air charge into one of cylinder groups and piping with relief valves for connecting the inlet receivers and exhaust manifolds of both groups of cylinders to each other.

The known devices ensure stable operation of the diesel at idle and low load modes 1.

The disadvantage of using them is the unevenness of wear of groups of cylinders due to the fact that the same group of cylinders is turned off at idle and low loads.

The aim of the invention is to increase engine life by ensuring uniform wear of the cylinder groups.

The goal is achieved by the fact that the shutdown mechanism is equipped with sensors for the position of the metering body of the fuel pump and crankshaft rush frequency, two normalized, with converters, dividing unit, two comparators, time relay control key and spool valves with electromagnetic control installed in high pressure between

, Q nozzles and a high pressure pump, and the sensors are connected to the spool valves through both normalized, their transducers, the dividing unit, both comparators and the time relay control key.

15 The shut-off mechanism is fitted with valves located in the intake receivers of both cylinder groups.

FIG. 1 shows a diagram of the device when both groups of cylinders operate; on

2Q of FIG. 2 is a diagram of the device with one disabled cylinder group.

The device shutdown mechanism includes a crankshaft speed sensor 1 and a sensor 2 position of the metering body 3 of the high fuel pump 4

pressure, connected with the help of normalizing converters 5 and 6 (П) and П2) with block 7 division (DB). Block 7 division through comparators 8 (Kt and Ka) with settings {9) and lower 10 limits of the signal is connected to key 1 (C) associated with time relay 12 (PB), which controls the operation of spool valves 13 with electromagnetic control and spring returns (not shown) and electromagnets 14 for actuating valves 5 and 16 and relief valves 17 and 8. Hydraulic distributors 13 are included in high pressure pipelines 19 between high pressure fuel pump 4 and cylinder group nozzles 20 and 21 and are connected to drain pipe 22 Valves 15 and 16 installed in the intake receivers 23 and 24 of the first and second groups of cylinders, respectively. The bypass valves 17 and 18 are installed in the pipes 25 and 26 connecting the inlet receiver 24 of the first cylinder assembly with the exhaust manifold 27 of the second group of cylinders and the inlet receiver 23 of the second group of cylinders with the exhaust manifold 28 of the second group of cylinders.

The arrows (Fig. 1 and 2) show the movement of the air charge in the intake receivers 23 and 24 and the exhaust gases in the exhaust manifolds 27 and 28.

The device operates as follows .30 .V.

When a diesel engine is operating, signals from the sensor 2 of the position of the organ 3 of the fuel metering of the high pressure fuel pump 4 and the sensor 1 of the crankshaft rotation speed through normalizing the transducers 5 and 6 enter the division block 7. The dividing unit 7 generates a voltage corresponding to the actual ratio of the position of the dispensing organ and the frequency of rotation k.:: Of the camshaft. This voltage is applied to the comparator 8, KOTOpi.ie compares the actual ratio of the specified values - voltage with the upper and lower limits defined by the specified settings 9 and 0. When the signals from sensors 2 and 1 corresponding to the set range are correlated, i.e. The idle mode or small diesel loads produce a signal that controls the terminal 11, through which time relay 12 is effected. When power is supplied to time relay 12, it is at certain specified equal intervals of time by means of the hydraulic distributors 13, it turns off the fuel supply to the injectors of one 20 or another 21 cylinder group, connecting high-pressure pipelines 19 to the drain pipe 22,

and stops the flow of fresh air charge to the deactivated group of cylinders by means of valves 15 and 16 with electromagnetic control while simultaneously connecting the inlet receiver 23 or 24

broken cylinder group with exhaust manifolds 27 and 28 of the working group.

This ensures the same time of operation of each group of cylinders and the uniformity of their contributions.

The device provides recycling

exhaust gases, which prevents overcooling of shut-off cylinders, reduces mechanical losses and thermal stresses in these parts.

cylinders when you turn them into work.

Claims (2)

1. A device for controlling a multi-cylinder diesel engine containing at least two cylinder groups with inlet receivers and exhaust manifolds, a high-pressure fuel pump with a metering unit, injectors connected to high-pressure pipelines with pumps, a fuel supply shut-off mechanism one of the groups of cylinders and piping with relief valves for connecting the inlet receivers and exhaust manifolds of both groups of cylinders to each other, characterized in that, in order to increase and engine life by ensuring uniform wear of the cylinder groups, the shutdown mechanism is equipped with sensors. The position of the dosing body of the fuel pump and the crankshaft rotation frequency, two m normalizing converters, a dividing unit, two comparators, a key for controlling the time relay and slide valves electromagnetic control, installed in the high-pressure pipelines between the nozzles and the high-pressure pump, and the sensors are connected to the slide valve E through both normalizing transducer block dividing both the comparator and the time switch control key. 2. A device according to claim 1, characterized in that the shut-off mechanism is provided with valves located in the intake ports of both groups of cylinders. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 628326, cl. F 02 D 37/00, 1978. Fig.T