SU861668A1 - Electrohydraulic apparatus for controlling gas distributing elements of i.c. engine - Google Patents

Description

(54) ELECTRO-HYDRAULIC DEVICE

FOR CONTROLLING THE GAS DISTRIBUTION OF AN INTERNAL ENGINE ORGANISM .1 The invention relates to the field of mechanical engineering and can be used in internal combustion engines having a gas distribution mechanism with electrohydraulic drive. Electrohydraulic devices are known for controlling the valve timing of an internal engine engine, comprising a housing with a supply, control and drain fittings and a spring-loaded electrolysis valve of an acicular type that is installed in the cavity of the housing. Regulation of the stroke of the closure member in known devices can be carried out using gaskets (1J However, in the known device, the control of the stroke of the stop sphgan in the bench conditions is related to the design disassembling pattern for changing the thickness of the gaskets, which is difficult and greatly increases the electrical configuration devices. The aim of the invention is to simplify the adjustment in bench conditions and increase the reliability of the SJjeKTpo-hydraulic device. in operation. COMBUSTION OF THIS in the case of The seals are fitted with spacers, movable 1: shear axially and provided with channels, communicating with the housing cavity with the inlet to the drain nipples. The armature of the closure body is made in the form of a disk with holes. Ugfall shf nozzle communicates with the housing cavity on the cortex side. This performance of the device allows to simplify the process of adjustment in the bench conditions. In addition, the placement of spacers in the seals increases the reliability of operation, since in this case it is practically excluded with leakage of fluid from the cavity of the valve. Taking into account the feasibility of developing electro-hydraulic valve timing actuators for internal combustion transport engines, the development of control means is necessary. Figure 1 shows a cross-sectional view of an electro-hydraulic control unit for the gas distributor and engine parts.

burnout FIG. 2 is a schematic diagram of a stand for setting up an electro-hydraulic device; in FIG. 3, the movement diagrams of the valve timing during movement of one spacer in FIG. 4 is the same with the movement of another spacer.

The electro-hydraulic device for controlling the valve timing of the internal combustion engine comprises a housing 1, a ram 2, an inlet 3, a control 4, and a drain 5 nozzles. An electromagnet consisting of a winding 6, a core 7 and a sleeve 8 is placed in the housing. The electromagnet controls the operation of the locking member placed in the cavity 9 of the housing 1 and made in the form of a needle 10 with a disk bore 11 having openings 12 for the passage of fluid. Measuring force is applied to measles 13. Spacers 14 and 15 with channels 16 and 17 of the passage of fluid from cavity 9 to fittings 3 and 5 are placed in the housing and the cover. Spacers are placed in seals 18 and 19 by means of movable gaek 20 and 21. For conclusions Electromagnet connector 22 is provided.

The electro-hydraulic device is installed on the stand (Fig. 2), which has a high pressure pump 23, which injects fluid into the hydraulic accumulator 24 and further to the inlet fitting 3. The pulse shaping unit 25 uses a sensor 26 to receive: a signal from the crankshaft simulator 27 and sends a signal to the connector 22 of the electromagnet. The control nipple 4 is connected to the power cylinder 28, the plunger of which acts through the yoke 29 on the valve of the gas distributor 30 of the same name. The drain nipple 5 is connected to the tank 31. The pressure in the accumulator is regulated by the safety valve 32.

In the process of regulation, when the position of the spacer 15 is changed, the law of movement of the valve timing changes. So, when the spacer 15 is moved downwards, the valve stroke changes along line 33 (FIG. 3), and when the spacer moves up along the .34 line.

When moving the spacer 14 upwards, the valve stroke changes along line 35 (FIG. 4), and when moving downward, along line 36.

Thus, at the stand you can choose the required law of movement of the valves.

The device works as follows.

When current is supplied from the pulse shaping unit 25 to the winding 6 of the electromagnet, the bore 11 attracts, from the core 7, the needle 10 opens the channel 17 and closes the channel 16.

Fluid from the accumulator 24 through the inlet fitting 3 is fed into the strips 9 and then through the operating fitting 4 to the hydraulic hydraulic cylinder 28. As a result, the valve distribution is raised. When the electromagnet is de-energized, the needle under the action of the spring 13 closes the channel 17 and opens the channel 16. The fluid from the hydraulic cylinder through the control nipple 4 and the cavity 9 is fed to the drain nipple 5 and further into the tank 31. Under the action of the springs spring on the saddle.

Regulation of the law of motion occurs directly during the work of the stand (Fig. 2). When the spacer 15 is moved downward, the stroke of the locking member (needle) 10 and the needle 10 and the measles 11 decrease simultaneously, while the gap between the disk and the core is reduced. The electromagnetic forces increase, and the valve opens earlier, but along a flatter path (line 33). When moving the spacer 15 upward, the needle and the disk are raised, opening channels 16 and 17 and increasing the clearance. The valve opens later, but moves along a steeper trajectory (line 34). The start of valve seating does not change with this adjustment. The limits for adjusting the valve opening phase D% depend on the size of the gap between the core and core, and the closing phase С1 ° values the throttling of the channel 16. Similarly, when the spacer 14 moves upwards, the valve body increases. The gas distributor valve opens and closes along a flatter path (line 35). A delay in opening and an early start in closing the valve occurs — due to compression of the spring. When moving the spacer 14 in the opposite direction, the camshaft valves move along a steeper path (line 36). Early opening and late start of closing in this case occurs due to a decrease in spring tightening. The limits for adjusting the opening phase of the valve h depend on the spring tightening, and the closing phase d. - from tightening the spring and the value of the throttling of the channel 16.

Conducted tests in bench conditions confirmed the effectiveness of the developed design.

Claims (4)

1. Electro-hydraulic device for controlling the gas-distributing bodies of the internal combustion engine, comprising a housing with inlet, control and drainage fittings and an electromagnet installed in the housing cavity and spring loaded a locking body, made in the form of a needle with a bark, distinguished by the fact that, in order to simplify the adjustment, seals with spacers that are axially movable and equipped with channels that connect the body cavity with inlet and drain fittings are installed in the housing. 2. A device according to claim 1, characterized in that the measles of the locking member is made in the form of a disk with holes. 3. Device popp. 1 and 2, except that the control nipple is in communication with the housing cavity from the side of the core. 4. Device on PP. 1-3, that is, so that the seals made of PTFE. Sources of information taken into account in the examination 1. USSR author's certificate F 01 L 11/00, according to application no. 2528516, cl; 1971 w Y // Tw / 7 /  j I.