DE1224559B - Device for preventing improper use of a starting excess flow setting on an injection pump for an internal combustion engine - Google Patents

Description

Means for preventing improper use of occasion overflow on an injection pump for an internal combustion engine The invention relates to a device for preventing improper adjustment of a stop for the control rod of an injection pump for an internal combustion engine in the starting excess quantity position, in which an actuating element for the stop and a second actuating element for a further device to be operated when starting the machine are connected, wherein the connecting link in the movement of the elements in overflow position of the stop or in the starting position of the further device rigidly in the opposite direction however, is resilient, so that the actuator for the stop in his Overflow adjustment until it returns, which is controlled by the control rod itself can remain in the normal maximum quantity position when the second actuating element from its starting process to its position associated with the operation of the machine going back.

In a known device of the aforementioned type, the other Device an electric starter. If the operator tried to to switch on the well-known overflow setting again after starting the engine the starter will mesh while the fuel machine is running and may be damaged will. However, such a possibility of interference must be considered a serious disadvantage be considered.

The object of the present invention is to avoid it the aforementioned disadvantage. This object is achieved according to the invention in that the further device is a hand-operated decompression device.

This measure prevents improper use of the occasion overflow position prevented in a simple way. Would the wait staff try that To make the excess quantity setting effective again during operation, the Internal combustion engine shut down by removing the compression.

There are other devices known in which the promotion the injection pump is set to zero with the decompression switched on. Such Devices cannot provide any indication for the present task, even in terms of the task at hand Invention give, even if through it a relationship between rack position and decompression is given.

It is also already known in connection with a Means for preventing improper setting of the occasion overflow position the control rod to provide that a decompression device is switched on, when the control rack is in the starter overflow position. However, there is one Locking device provided in the form of a cam and a pawl with the Control rod interacts and is only inactive when the machine is started up is set. Switching on the decompression device while the machine is running is not possible there, as opening the valves during operation is harmful is held.

An additional security against improper use results in that only the bed actuator for the decompression device is accessible from the outside, but the actuator for the stop is accessible withdrawn from the outside or inaccessible when the motor is installed.

An exemplary embodiment of the invention is shown schematically in the drawing shown. It-shows F i g. 1 the device in the operating position or position for normal amount, F i g. 2 to the in F i g. 1 illustrated position Position of the quantity stop, F i g. 3 the device in the decompression position or Position for excess, F i g. 4 to the in F i g. 3 position illustrated appropriate release of the excess, F i g. 5 the device in the operating position while the actuating element for the excess quantity is still in the excess quantity position.

In the drawing, the adjusting lever for the decompression device, not shown in detail, is denoted by 1. The handle 2 on the lever 1 indicates that it can be brought from the operating position B into the decompression position D by hand against the force of the torsion spring 3. If it is released, it returns to position B under the action of the torsion spring 3. The lever 4 for setting the quantity stop 5 is connected with the aid of the elastic connecting member 6 with the lever l in such a way that the lever 4 when the lever 1 is moved from the position B to the position D from the position N for normal injection quantity in the Position (i for excess quantity is taken along against the force of torsion spring 7. In position N, quantity stop 5 is in the position shown in FIG In the position ü (Fig. 4) the normal quantity stop 9 is rotated out of the way of the control rod 8, so that this runs out when the machine is at a standstill and at the starting speed up to the maximum quantity position. It can also be formed by a rigid joint (not shown) in the lever 4 which can, however, be buckled in the opposite direction.

The mode of operation of the device is as follows: Before the internal combustion engine is started, the lever 1 is placed in position D and held there (FIG. 3). The internal combustion engine is then brought to ignition speed by hand or by a starter. When this is reached, the lever 1 is released (Fig. 5). The excess quantity position of the control rod 8 set by turning the lever 1 into position D is retained and has the effect that an above normal amount of fuel is injected. As a result, the internal combustion engine starts up easily and reaches the speed at which the speed controller, not shown, reduces the fuel supply, which results in a movement of the control rod 8 in the position shown in FIG. 4 expresses the position shown in dashed lines. As a result, the normal quantity stop 9, which previously rested on the control rod 8, comes out of the action and the torsion spring 7 can bring the lever 4 back into position N (FIGS. 1 and 2). If the machine is loaded again, the control rod 8 is again in contact with the normal quantity stop 9. Since the lever 4 is located inside the machine housing or in another inaccessible place, no unauthorized increase in the fuel supply can be set. If one were to try to accomplish this with the help of the lever 1, the engine would only be switched off, since the removal of the compression would lead to the ignition of the injected fuel being cut out.

Claims (4)

Claims: 1. Device for preventing improper adjustment a stop for the control rod of an injection pump for an internal combustion engine in starter overflow position, in which an actuator for the stop and a second actuating element for one to be actuated when starting the machine further device are interconnected, the connecting member in the Movement of the elements in the overflow position of the stop or in the starting position the further device is rigid, but flexible in the opposite direction, so that the actuator for the stop in its overflow position up to its return to the normal maximum quantity position controlled by the control rod itself can stop when the second actuating element is out of its starting process returns to its position assigned to the operation of the machine, characterized in that that the further device is a hand-operated decompression device. 2. Device according to claim 1, characterized in that only the actuating element (1) for the decompression device is accessible from the outside, but the actuating element (4) for the stop is withdrawn from outside access. 3. Set up after Claim 1, characterized in that the resilient connecting member (6) is a known flexible wire rope, cable or rod is. 4. Establishment according to claim 1, characterized in that the resilient connecting member through one rigid in one direction in which. In the opposite direction, however, the joint can be buckled is formed in the actuator for the stop. Considered publications: German Patent Nos. 677 525, 630 484; German utility model No. 1703 330; U.S. Patent No. 2,089,278.