DE2119675A1 - Arrangement for starting and stopping a diesel engine - Google Patents

Description

Patent attorneys Dipi-ing. R. π :: etzmb. Dipi-in- ?. κ. i-AV.r '. ^ wMT 62-16.950P April 22, 1971

8München22, Sieinsdorfetr. 10

Automobiles Peugeot, Paris (France)

and
Directed by Nationale des Usines Renault, Paris (France)

Arrangement for starting and stopping a

Diesel engine

The invention relates to an arrangement for starting (starting) and stopping a diesel engine, in particular to control the shut-off device of the fuel line.

In the automotive engineering one is well known since Long tried to create arrangements for controlling diesel engines that start and stop the Diesel engines by the same operations as for Allow petrol engines despite the lack of an electric ignition.

The applicant (cf. German patent application P 19 54 630.6-13) already has such an arrangement or device proposed in which the glow circuit, the starting circuit and the device for operating the

62- (57/71) Hd-r (7)

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Shut-off element of the fuel line from a switch are controlled, which is essentially the same as those used for gasoline engines and operated in the same way both for starting and for Off. According to this proposal, the shut-off element of the fuel line is in a known one electromagnetic device with two stable positions and automatic limitation of power consumption during the movement of the armature. Although the solution according to this proposal is technically flawless works, it is relatively expensive because of the many necessary organs, especially the Unischaltkontakte and the relay, particularly with regard to mass-produced vehicles.

It is therefore the object of the invention to further develop such an arrangement so that it becomes a simpler one Structure and thus also has a significantly lower price, without suffering technical disadvantages.

Such an arrangement should therefore be applicable to a currently common main switch (switch box) which assumes the following five positions in succession: "Halt", "Additional devices ¹¹ ;", "Garage", "Drive ¹¹ " and "Start", what corresponds to the following electrical functions of the main switch in the individual cases!

"Halt": all circuits are switched off;

"Additional devices": certain additional devices, such as

Car radio, can be powered;

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"Garage": all circuits are switched off;

"Driving": normal driving position, d. H. all circuits, except for the glow circuit and the starter circuit, are supplied with electricity;

"Starting": in this (only taken briefly) Position, the glow and starter circuits are supplied with power, while the Circuits for the additional equipment

are switched.

The object of the invention is achieved in that the shut-off element can be actuated by an electromagnetic device known per se, which has two stable positions and an actuation winding for each actuation direction voltage is available when the switch arm rests on the contact for "tempering", and that the coil for closing the Absperrorganszwischen the contact for "options" and ground and in series with a con- g clock for opening a relay is, the winding between the contact for "ride" and earth is arranged.

oils invention is explained in more detail with reference to the drawing, 1 and 2 of which two different exemplary embodiments of the arrangement according to the invention are shown.

According to Fig. 1, a known main switch 1 with its movable switching arm 1a can take five different positions, which are indicated by arrows 2 ("stop"), 3 ("additional devices"), k ("garage"), 5 ("drive") ) and

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6 "Starting") are symbolized, the latter position being unstable. The main switch 1 also has fixed contacts 7-9 »which work together with the switching arm 1a and perform the following functions: The contact 7 is assigned to the circuit for the additional devices such as the car radio that are to be operated when the engine is switched off. The contact 8 is provided for a power supply during normal operation of the vehicle. The contact is assigned to the power supply of view B of the glow and starter circuit. Such a block is described, for example, _o in the earlier application.

If the switching arm 1 is in position 2 or, the contacts 7 »8 and 9 are switched off. if When switching arm 1 is in position 3, voltage is only applied to contact 7 · The contacts are in position 5

7 and 8 applied with voltage. After all, in the position 6 at the contacts 8 and 9 voltage.

A shut-off element arranged in a fuel line 11 10, which generally belongs to a pump, is actuated by a magnet armature 12, which is in the opening direction by a winding 13 and in the closing direction is driven by a winding 14. The winding is connected between contact 9 and earth, the winding 14 between contact 7 and earth. In series with the winding 14 is a normally closed contact 15 'for opening is operated by a relay whose "winding 16 between the contact 8 and the earth. Since the windings 13 and 14 are connected independently of one another, can have their characteristic values depending on the forces which are necessary for each direction of displacement can be selected.

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The Ausfülirungsbeispiel of Fig. 1 works as follows?

To start the engine, the Sehaltarm 1a is in the Position 6 brought. The switching arm passes through la first the position 3, so that the winding 14 is excited because the contact 15 is closed. But that doesn't have any Influence on the shut-off element 10, since this remains closed anyway. When the switch arm 1 reaches position 5, If the winding 16 is excited, the contact 15 opens itself, and the winding 14 is de-excited. When the switching arm 1 reaches position 6, the winding 13 energized so that the shut-off element 10 is opened. At the same time, the glow and then the tempering of the engine.

The main switch 1 now returns to position 5, in which the windings 13 and 14 are de-excited, because the contact 15 is kept open.

In order to turn off the engine, the switching arm 1a is moved back further. If the chaltarm 1a namely the Leaves position 5, the winding 16 is no longer energized, the contact 15 closes and the winding 14 is energized when the switching arm 1a reaches position 3, so that the shut-off device 10 is closed.

It is therefore easily possible to perform the invention by designing the arrangement in this way to solve.

In the simple embodiment of FIG. 1, however, the winding "\ k remains under tension when the

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Main switch 1 is stopped in position 3, which could lead to a relatively large power consumption.

The exemplary embodiment overcomes this shortcoming of Fig. 2. In this embodiment, a Input of winding 16 to a first diode 17 on contact 7 and the other input to a second diode 18 on contact 8 connected.

Overall, this embodiment operates like that of FIG. 1. In the embodiment of Fig. 2, however, the coil 16 is also energized when the main switch 1 is in position 3, _f so that the contact is offengshalten 15th However, the power consumption in this position is much lower than in the first exemplary embodiment, since the winding 16 has a significantly lower power consumption than the winding i4. During the operation to switch off the engine, the contact 15 closes again when the main switch 1 reaches position K , so that a pulse can be sent into the winding 14 when the main switch 1 reaches position 3 before contact 15 again is opened by energizing the winding 16.

The diode 17 prevents the current from flowing back through the contacts 7 and 15 when the main switch 1 is off is in the position 6, while the diode 18 prevents the current from flowing back through the contact 8, if the main switch 1 is in position 3.

As shown in Fig. 2, the connections of the winding 13 instead of directly to the contact 9 with ir-

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be connected to one point of the starting circuit, the voltage is only applied when the main switch 1 is in position 6. It goes without saying that a Such a connection can also be provided in the embodiment of FIG.

It should also be noted that the invention is also applicable to other circuits for annealing and tempering can be used as shown in the drawing

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Claims (2)

Claims 1.y arrangement for starting and stopping a diesel engine, with a shut-off device provided in the fuel line and with a main switch _s that has a movable switching arm, a contact for "additional equipment", a contact for "driving" and a contact for "starting", the contact for "additional devices" is simultaneously energized for the positions "additional devices" and "travel" of the switching arm and is temporarily disconnected while switching from one to the other of these positions, characterized in that the shut-off device (1O) by an electromagnetic device known per se can be actuated which has two stable positions and an actuating winding (13 »1 * 0 for each actuating direction, so that the winding (13) for opening the shut-off element is between earth and a part of the arrangement that is live , when the switching arm (la) rests on the contact (9) for "starting", and that the winding (i4) to the Sch let the shut-off device between the contact (?) for "additional devices" and earth and in series with a contact (15) for opening a relay, the winding (16) of which is arranged between the contact (8) for "travel" and earth (Fig. 1). 2. Arrangement according to claim 1, characterized in that the connections of the winding (16) of the relay via a first diode (17) on contact (7) for "additional equipment" or via a second diode (18) on contact (8) for "driving" are connected (Fig. 2). 109851/0977