JPS5847111A - Device for forwarding and distributing pressure air for control - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a distributing device that delivers control pressure air to a starting air valve of an internal combustion engine and opens the pre-distribution valves in a predetermined order.
The device includes a casing, a shaft rotatably journal-bearing within the casing, and a plurality of holes attached to the shaft and located within a chamber formed in the casing and arranged along a circle concentric with the axis of rotation of the shaft. said six holes are connected to a starting air valve, said distribution disk having a contact surface oriented to said end face of the chamber and having an arcuate supply groove and an arcuate supply groove. relief grooves, both of which are radially aligned with the holes in the chamber end faces, each passing through a conduit in the disc to the mating holes in the opposite outer surface and the contact surface of the disc. The last-mentioned holes communicate with the surroundings at all times and include an inlet hole for introducing control pressure air into the outer chamber of the outer face of the distribution disk. .

This empty bag distributing device for controlling rice is covered by Swiss Patent No. 348.5.
It is disclosed in No. 75. The number of holes in the end face of the chamber is equal to the number of engine cylinders, and these holes are angularly spaced according to the firing order of the cylinders. When the engine is started, control air flows into the chamber. is supplied from the inlet hole of
From here it flows through a supply groove in the distribution disk and one or more holes in the chamber end wall aligned with this groove to the starting air valves connected to said holes, whereby these valves are opened. Start-up air is allowed to flow into the cylinder during the time that the remaining start-up air valves remain closed. The engine is now started, thereby causing the distribution disc to rotate synchronously with the engine, making one revolution during each complete working cycle, which in a four-stroke engine is equivalent to two revolutions of the crankshaft. In keeping with this timing, each starting air valve is opened and closed when each of the supply and relief grooves in the distribution disk assumes a position in alignment with the associated holes in the chamber end wall.

The disadvantage of this known distribution device is that when the control air supply of the distribution device is cut off, the control pressure in these starting air valves is reduced by the pressure that these valves are connected to the supply grooves of the distribution disk. This results in an immediate drop, opening at this moment from
These water locks are closed. Therefore, the torque exerted on the crankshaft by the starting air is reduced and the engine speed is reduced. The disadvantage of this is that the engine, in which the fuel supply does not begin until the air supply to the distributor is cut off, has a tendency to maintain its initial direction of rotation, especially when the thrust of the water acts on the force of the engine and thus the desired direction of rotation. This is particularly noticeable in reversible rotary engines such as marine engines, which resist changes in speed.

According to the invention, a closing disc is provided at the distal end of the shaft projecting into the chamber, the disc distributing the disc force at least through the outer surface of the disc and the hole provided in that surface. axially movable between an operative position in which the hole is closed in sealing contact and an inoperative position in which there is one gap force ball between the closing disc and the distribution disc; characterized in that an actuating device is provided for pushing the circle into the actuating position and maintaining the circle in that position, and an entrance hole to the chamber is provided in the side wall of the chamber opposite the gap between the two plates. .

During the main part of the start-up operation, the distribution device functions as described above, ie the incoming control air pushes the closing disc away from the distribution disc, ie into its inoperative position. At the moment when the supply of control air is cut off, the actuating device acting on the closing disc moves the closing disc into its operating position with a force 1 and brings it into contact with the distribution disc (1). The flow passage is opened between the starting air valve and the chamber, which is opened at that point by the rotation of the distribution disc, so that the passage is vented through the relief groove. Since a pressure above atmospheric pressure is maintained in the passage and the connected starting air valve is therefore kept open, the torque imparted to the crankshaft by the starting 9 atmospheres is therefore maintained over a long period of time.

In this way, it is avoided that the engine speed per minute decreases before the supply of fuel into the cylinders and ignition ensures continuous rotation of the crankshaft. The closing disc also prevents flow of control air during continuous rotation of the distribution disc, so that starting air and fuel are not simultaneously supplied to the same engine for any starting air valve other than the starting air valve that is already open. There is no danger of it being fed into the cylinder.

In a preferred embodiment, the device for actuating the closure disc includes a secondary air inlet hole for supplying pressurized air to a cavity located on the outside of the closure disc remote from the distribution disc. Both inlet holes are supplied together by the same square air source and they are controlled in a simple manner by one common valve or by two equal valves, thereby pushing the closing disc into its working position. The moving air is introduced at the same time, or just before the air inlet closes, if desired.

This embodiment further includes forming the closure disc with an empty side wall such that the closure disc has a nine circumferential throttle gap between its two sides, and from the outer chamber of the closure disc into a narrow vent. Improved by providing holes. During this start-up phase, i.e. while the secondary inlet is closed, a positive pressure of a magnitude of The relatively low pressure ensures that the distribution disc remains in contact with the opposite end face of the casing by the force acting on the outer surface of the closure disc while holding the closure disc in its operating position with a low pressure of 1. do.

The edges of the opposing surfaces of the distribution and closure discs are formed with sloping chamfers which cooperate to form a tapered shaped passage leading into the gap between the inner discs. When the main air inlet is opened,
The incoming air exerts a dynamic force on the two discs, which causes the closing disc to immediately move into its inactive position even when the discs are in intimate contact.

The present invention will be described in detail below with reference to the drawings.

The control air distribution device shown in the figures includes a casing 1 into which a bearing sleeve 2 supporting a shaft 3 is fitted. The shaft carries at its end protruding from the casing a gear 4 driven from a crankshaft or shaft of an internal combustion engine (not shown);
This causes the shaft 6 to complete one revolution during each complete working cycle within one engine cylinder.

The opposite end of the casing 1 is closed with a cover 5 and forms a chamber, generally designated 6, in which a distribution disk 7 is attached to the shaft 3 and is axially connected by means of a spacing sleeve 8 and a nut 9. is positioned. The distribution disk 7 has a flat contact surface 10 which faces the flat end surface 11 of the casing 1 and is maintained in sealing contact with the surface 11 during the starting operation.

The end face 11 has two rows of holes 1 arranged at equal angular intervals.
2 and 16, respectively, are arranged along two respective pitch circles concentric with the axis of the shaft 3. It is shown in Figure 2.
There are six holes in each row, which means that the engine (
Assume that the engine (not shown) is a plastic rotary six cylinder marine engine with a starting air valve in each cylinder. The name tag 12 forms the mouth of the inner bore 14 of the casing, and from the bottom of each bore,
A radial bore 15 extends through which connects a pipe 44 (see FIG. 6) leading to one port of the switching valve 45.

A similar bore 16 connects the name tag 13 with a hole 17 that connects a pipe 46 leading to another port of the switching valve 45.

As shown in FIG. 6, the switching valve 45 is a 6-way, 2-position valve.
Through this, either pipe 44 or pipe 46 communicates with a chamber 48 in the starting air valve '49 of one engine cylinder via a pipe 47 connected to the sixth valve hoard. As already mentioned, each cylinder is each equipped with one starting air valve and therefore one switching valve 45 with an associated nosepipe 44° 46.47 is provided for each cylinder.

Since the diverter valves are built together as one unit, all valves can be switched between their end positions depending on whether the engine is started in the "forward" or "reverse" direction, e.g. They are switched together by one common command signal.

As implied in FIG. 6, each starting air valve 49 is maintained in a normally closed position by a spring 50 acting between a valve C housing 51, a valve member 56, and a piston 52 integrally formed. room 4
8 is formed between the housing 51 and the piston 52,
And when control pressure air is supplied to the chamber 48 from the control air distribution system via the associated switching valve 45, overcoming the spring force, the valve member 56 opens to direct pressure starting air to the appropriate source 54. VC flows into the engine cylinder (not shown) from the engine cylinder (not shown).

The contact surface 10 of the distribution disk 7 is provided with two feed grooves 18 and a relief groove 19, all of which are formed as circular arcs with an intermediate radius equal to the radius of the pitch circle of the holes 12, so that the distribution disk During rotation, these sequentially assume positions opposite or aligned with the six holes 12.

Further feed grooves 20 and relief grooves 21, which are likewise formed as circular arcs, cooperate in a corresponding manner with the holes 13.

Each feed groove 18 and 20 communicates with a hole 26 in the opposite outer surface 24 of the distribution disk by a bore 22 passing through the distribution disk 7 parallel to the axis of the disk. Inner hole 2 extending parallel to the axis
5, each relief groove 19 and 21 communicates with a common radial bore 26 of the distribution disk. The bore 26 is closed at its outer end and opens concentrically into a bore 27 extending parallel to the axis and terminating in a bore 28 in the contact surface 10. As seen in FIG.
It is located opposite the inner chamber 55, which is constantly ventilated through the inner hole 29.

The spacing sleeve 8 carries an axially movable closing disk 60 with a flat continuous end surface 31 turned around the outer surface 24 of the distribution disk 7 . Between the closing disc and the cover 5 there is a chamber 6.
A cavity 32 is provided therein, into which control pressure air is supplied through an inlet hole 63 in the cover. A further inlet hole 34 for control pressurized air is provided in the side wall of the chamber 6 opposite a gap 65, said gap being connected to the distribution disk 7 when the closing disk assumes its inoperative position shown in FIG. and the closing disc 60.

As shown in FIGS. 1 and 5, surfaces 24 and 31
Since the outer edge of is inclined, a relatively wide conical surface 36 is formed.
and 67 are respectively formed, and these conical surfaces cooperate to form a wedge-shaped tapered air flow path from the hole 64 to the gap 35. The outer diameter of the closing disk 30 is selected such that a relatively narrow throttle gap 68 is formed between this disk and the periphery of the chamber 6. A narrow vent lumen 69 communicates the cavity 32 with the atmosphere.

Inlet holes 36 and 64 respectively) (Eves 56 and 5
7 to two ports of a two-position, four-way valve 58 (see FIG. 6). The sixth port of the valve 5B is a stop valve 60
The fourth port of valve 58 is vented to the atmosphere, while the fourth port of valve 58 is vented to the atmosphere.

This distribution device functions as described for the Queen, in which case the internal combustion engine is started in the "forward" direction as shown in FIG. are connected to the combined holes 12 of the end face 11, and the connection to the boxwood holes 13 is closed.

When the valve 58 is in the position shown in FIG.
0 is open, the control pressure air flows into the inlet 34, and in this case the inlet 33 is closed.

When pressurized air enters the dispensing device through the inlet 64, if this disc is already in its position (or not) it is pushed into the inoperative position shown in Figure 1. 68, flows into the cavity 32, is narrowed by the plow barrier, and from the cavity 62&i narrow (force vented to the atmosphere through the inner hole), the size of the cavity 32 becomes An intermediate pressure is created which exerts an axial force on the disc via the disc 30 and the spacing sleeve B, which creates a sealing contact between the face 10 of the disc and the end face 11 of the casing 1. Guarantee.

The control air is supplied through the gap 65 and the combined inner hole 2.
2 to the two supply grooves 18, from which the air is respectively aligned with the force-groove 18.
The air flows through the two holes 12 to the starting air valve connected thereto. ~・If the main stop valve 61 in the 6-pipe connecting the starting air source 54 to the starting air valve 49 of the number of pieces is open, the starting air valve is opened as described above, and the engine starts. It begins to rotate. Via the gear 4, the engine drives a distribution disc, by means of which each of the six starting air valves is connected to the supply groove 1.
Semi-control air is supplied sequentially from 8 to A, and then to A relief groove 1.
9 and grooves 19, the air is vented through the inner holes 25-29. As mentioned above, the pressure created in the cavity 32 keeps the contact surface 10 of the distribution disk in sealing contact with the end face 11 of the housing.

When the engine reaches a certain rotational speed, the valve 58 is switched to its opposite position, so that the supply of pressurized air through the bore 64 is cut off, the tube 57 is vented to the atmosphere, and at the same time the pressurized air is passed through the tube 56. and is introduced into the cavity 62 through the hole 33.The closing disk 30 receives a differential pressure acting at this point towards the left in FIG. is brought into sealing contact with the surface 24. As a result,
A pressure above the existing atmospheric pressure is maintained in the two supply grooves 18 and in the pipe connections 44.47 from the grooves to the two starting air valves which are open at this moment. The supply of starting air is thus continued through these valves into each of the two engine cylinders until rotation of the distribution disc causes the associated holes to mate with the relief grooves 19.

In order to guarantee the supply of starting air to the cylinder, the main valve 61 is operated for a predetermined period of time after the supply of air to the hole 64.
Normally, it is not closed until 6 seconds to 8 seconds elapse. It is advisable to keep valve 60 open during this time, thereby maintaining the air supply to bore 66.

As shown in FIG. 1, the shaft 3 is supported in the bearing sleeve 2 by two journals 40 and 41 of different diameters. This unequal diameter means that the pressurized lubricating oil supplied to the cavity 42 in the casing 1 and from there to the bore 46 of the bearing sleeve 2 and also to the journal can be supplied to the shaft when no pressurized air is supplied to the distribution device. 3 during regular operation of the engine.

Move it slightly to the right. This symptom is caused by contact surface 1
1, it is ensured that the distribution disk does not slip against the contact surface 11, which would cause unnecessary wear.

[Brief explanation of the drawing]

1 is an axial cross-sectional view of an embodiment of the distributor according to the invention; FIG. 2 is a plan view on an enlarged scale showing the end face of the distributor casing facing the distribution disk; and FIG. 3 is a plan view of the end face of the casing. FIG. 4 is a plan view, shown to scale, of the face of the distribution disk oriented to the direction shown in FIG. 4, and FIG. 4 is a sectional view taken along the line V--VK of FIG. 4, and FIG. 6 is a diagram illustrating the functioning of the distribution device and starting air system. 1...Casing, 2゛...Bearing sleeve, 6...Shaft, 4...
Gear, 5...Cummy, 6...Chamber,
7... Distribution disk, 8... Spacing sleeve, 9... Nut, 10... Contact surface,
11... End face, 12. 13... Hole, 14.
... Inner hole, 15... Radial hole, 16... Inner hole, 17... Hole, 18.20... Supply groove, 19.91... Supply groove, 22... Inner hole ,2
3... Hole, 24... Outer surface, 25.
26.27...inner hole, 28.29...hole, 60.
...Closing disk, 31...End face, 32...Vacancy, 33.34...Inlet hole, 65...Gap, 36.37...Conical surface, Filter 8...Aperture gap , 39... Ventilation inner hole, 40.41... Journal, 42... Cavity, 46... Hole,
44,46.47...pipe, 45...switching valve,
48...Room. 49... Starting air valve, 50... Spring, 51...
・Valve) 1 Uging, 52... Piston, 53...
- Valve member, 54... Pressure air source, 55...
: Small chamber, 56.57...pipe, 58...valve, 59...pipe, 60...stop valve,
61...Indicates the main valve. F/G6

Claims (1)

[Claims] 1. Control pressure air is sent to the starting air valves (c) of the reciprocating internal combustion engine, and the valves are opened in a predetermined order (in the distribution device, the casing 11.1, It comprises a rotatably journal-bearing shaft (3) and a distribution disk mounted on the shaft and arranged in a chamber with one end face fiυ formed in the casing, in which a plurality of holes (12, 13) is arranged along a circle concentric with the axis of rotation of the shaft and configured such that the 6 holes are connected to the starting air valve 4, said distribution disk (7) being oriented towards said end face 0D of the chamber. A supply groove (18, 20) having a contact surface and having an arc shape and a circle;
an outer surface (19, 21) having arcuate relief grooves (19, 21), both grooves being aligned in the radial direction with the holes in the chamber end surface aυ, and 6 holes facing each other via channels formed in the disk; wealth)
and the combined holes (
23, 28), the last-mentioned hole (c) communicates with the surrounding environment, and an inlet hole (6) K through which control pressure air is introduced into the outer chamber (6) K of the outer surface Q4 of the distribution disk. 2) and projecting into the chamber (6), a closing disc (to) is attached, which closes to the outer surface c! of the distribution disc (7). A gap (G) is formed between the closing disc and the distribution disc, the actuating position that is in sealing contact with the opening (C) of the surface at least so as to close the hole, and the closing disc and the distribution disc. axially movable to and from an inoperative position, an actuating device being arranged for pushing the closing disc (7) into its working position and maintaining it there; Pressure air delivery distribution device for controlling a starting air valve of a reciprocating internal combustion engine, characterized in that the air inlet hole l34) into the chamber is arranged on the side wall of the chamber opposite the gap between the discs (7, 30). . 2. The device (to) that operates the closing disc (7) is connected to the distribution disc (
7) Distributing device according to claim 1, characterized in that it comprises a secondary air inlet hole for supplying pressurized air to the cavity located on the outside of the closing disc (7) remote from 7). *,. 3. The annular drawing gap between the two parts a of the closing disc (to)
) is formed by said disc (321) cooperating with the side wall of the chamber (6), and a narrow ventilation bore OI is provided from the outer cavity (321) of the closing disc Dispensing device according to claim 2. '4. The edges of the facing surfaces (24, 31) of the li+disc (7) and the closing disc (to) form an inclined chamfer, and these A dispensing device according to any one of the preceding claims, characterized in that the chamfers cooperate to form a tapered annular inlet passage leading into the gap (c) between the discs.