DE1908797A1 - Automatic starting device for internal combustion engines - Google Patents

Description

Lawyer8akbe 18 073

G-ürtner S ₉ A ,, Paria / France

Automatic starting device for combustion engines

The invention relates to an automatic starting device for internal combustion engines ».

For the correct ignition of a Verbrejinungsmotor it is necessary to enrich the mixture in inverse proportion to its temperature. This task comes the Starting device closed * To avoid incorrect handling and subjective control by the user as well

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to relieve it, it is advisable that the vd-i-e starting device automatically, i.e. from human influences works independently.

The invention relates to a simple, easy to manufacture, robust device that is connected to an automatic Starting device meets the requirements. For a better understanding of the invention, the following points to point out

1. An engine that has been out of service for a long period of time is considered to be cold »'

2ö An engine that has been in operation for a certain period of time is considered to be warm.

Because of these two characteristics, it is possible to instead the temperature to use the time as a regulating variable and in this way a simple and reliable automatic To create starting device that is operated hydropneumatically or hydroelectrically.

The device according to the invention consists essentially from the following elements:

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1o A starter chamber, the maximum filling level of which is geometrical by which the float chamber of the carburetor is determined

2. A feed circuit (connection between the starter chamber and float chamber), the

a) a nozzle that determines the time constant of filling the chamber _;

b) a valve normally open in the rest position, which is controlled by a parameter dependent on the engine rotation, and

c) in the case of pneumatic actuation, a valve, that the control impulses in terms of direction and size selects

owns; -.-'_ ' . .

3 * A start circuit (connection between the chamber and the suction line) »the off

a) an atomizer located under the throttle valve,

b) a lock attached to the grass regulating flap organ that blocks the circuit when the gas control flap is in idle position and

c) a starting nozzle
consists.

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The enclosed paper shows:

Fig. 1 is a section through a schematically shown carburetor and its additional organs for operation the automatic starting device with pneumatic control of the valve for feeding the starter chamber.

Fig. 2 shows a modified embodiment in which the valve for feeding the starter chamber is controlled hydroelectrically.

3 and 4 representations of two embodiments modified with regard to the arrangement of the atomizer. to shape.

In Fig. 1 the float chamber 1 of the carburetor and · the start chamber 2 of the automatic starting device shown. The float chamber 1 and the starter chamber 2 are via a line 4 »in which a valve 3 is connected to each other. At the bottom of the starter chamber 2, two lines 5 and 5 are fully provided which the first with the line 4 and the second with the line 6 connected to the start atomizer 7 iii connection 1st. In lines 5 and 5 there are nozzles 8 or * 8 planned «

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The float chamber 1 feeds directly via line 9 the nozzle for normal operation.

The valve 3 connecting the float chamber 1 to the starter chamber 2 is on a deformable membrane 10 attached, on which a spring 11 acts and which in a manometer chamber 12 communicating with the atmosphere through a precisely dimensioned bore 13 is mounted.

The manometer chamber 12 is about a. Ball valve H, open which a spring 15 acts, connected to a channel 16 ^ which is in communication with the crankcase of the engine 17. The channel 16 can also be connected to the suction line of the motor.

The device works in the following manner

When the engine is at a standstill, the valve 3 is open so that the float chamber 1 with the starter chamber 2 in connection that corresponds to the fluid level in the float chamber 1 is filled to the maximum accordingly. When the engine is started up, the impulses of the intake line or how on Fig. 1 - the crankcase on the manometer chamber 12 transmitted via the ball valve 14, which - in the on the case shown in Fig. 1 - the negative Druokand-

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lets through. The spring 15 is adjusted so that the least acting on the deformable membrane 10 Negative pressure causes the valve 3 attached to this membrane to close.

As soon as the motor starts, the negative pressure acting on the atomizer 7 triggers the operation of the start circuit. The starter chamber 2 is gradually emptied as a function of time according to a law that depends on the change ^ h. This change can be set as desired by the geometric shapes given to the starter chamber 2 so that the enrichment decreases in a corresponding manner over time until it reaches the zero value when the starter chamber 2 is completely emptied. During this time, the engine is considered to be warm and can dispense with the operation of the starting device.)

If the engine operation is interrupted, the the ball valve 14 isolated manometer chamber 12 via the precisely dimensioned opening 13 of the atmospheric pressure manufactured. The initial state is thus reached again. The starter chamber 2 is filled via the nozzle 8, the one proportional to the time and therefore to the cooling

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Change Δ h causes (according to the maximum filling the start chamber 2 required time the engine considered cold).

Furthermore, one is attached to the gas regulating slide 18. tes closing device 18 ^! provided that "when the gas regulator is in the idle position, the starting circuit is blocked (the intake line is connected to the engine in the direction of arrow A). In this case, excessive enrichment would impair the operation of the warm engine.

Fig. 2 shows a modified embodiment in which instead of valve 3, the shaft 19 of a solenoid valve 20 is provided, which the opening "21st, which the float chamber 1 connects to the pantry 2, can accidentally close. The needle 19 or the solenoid valve is in the rest position opened under the action of the spring 22.

As soon as the engine is put into operation, a part can the induction current of the alternator of the ignition system can be used to energize the winding of the solenoid valve, which thereby moves the needle 19 into position brings, in which it closes the opening 21.

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. With regard to the modified ones shown on Pig 3 and 4 Embodiment should be mentioned that it is in the above-described, vertically moved closing member 18 ', which does not appear progressive., In some cases it can happen that the mixture is too rich just before the closure of the atomizer 7 and the engine is stalled. -.

In order to avoid this disadvantage and to achieve that the throughput of the atomizer 7 is proportional to the opening of the gas regulating slide 18, i.e. more completely Opening reaches the maximum value and is zero when idling, the atomizer 7 can in front of the gas control slide arranged (Fig.3) or with the additional Air intake line 19 of the main carburetor circuit 9 be coupled (Fig. 4).

So that there is a throughput in the starting circuit, the gas regulating slide must be wide open so that the maximum negative pressure comes into effect at the atomizer 7, the more the gas regulating slide closes, the more the negative pressure decreases, so that the throughput of the atomizer 7 and thus that generated by the starting device Enrichment decreases until the value is reached at idle ".

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Claims (5)

_ 9 patent claims: 1 Λ Automatic starting device for combustion engines, characterized by a starter chamber (2), the maximum filling level of which is geometrically dependent on that of the float chamber (1) of the carburetor and which is connected on the one hand with an atomizer (7) opening into the feed line and on the other hand with the float chamber (1) is connected via a line (4) in which a valve (3) is provided which is attached to a deformable membrane (10) which forms the wall of a manometer chamber (12) which is opened via a precisely dimensioned opening ( 13) is connected to the atmosphere and via a spring (15) provided with a pre-tensioned valve (H) for the selection of the pressure changes to the intake line or the crankcase of the engine (17), with the starter chamber (2) in the Fuel from the float chamber (1) supplying line (5) and in the line connected to the atomizer (7) 1 1
(5) nozzles (8,8) are provided. 2. Starting device according to claim I, characterized in that that the float chamber (1) with the starter chamber (2) connecting valve (19) through 10 909841/0908 - 10 - ■ -.... * "" ■■■■; a solenoid valve device is controlled, through the winding of which a part of the induction current of the / alternator is controlled of the motor flows. 3. Starting device according to claim 1 or 2, characterized by a closing element (18 ') which is attached to the gas regulating flap' (18) and which puts the starting circuit in the idle position the gas regulating flap locks. 4. Starting device according to claim 1, characterized in that the atomizer (7) in front of the gas regulating flap (18) is arranged so that its throughput to Opening of the throttle valve is proportional. 5. Starting device according to claim 1, characterized in that the atomizer (7) with the additional The air supply line (19) of the main circuit is coupled ο .90 9 841/090 3