DE435819C - Method for starting injection internal combustion engines with self-ignition - Google Patents

Description

Method for starting compression-ignition internal combustion engines. There are known methods for starting injection internal combustion engines, at which besides the starting air a jet flame is sucked into the cylinder, so that by the subsequent compression of the starting air for the ignition of the injected fuel required temperature is reached.

In this case, however, all of the air that is sucked in is introduced into the cylinder and only a part of it through the burner and with the ram in the vicinity of the inlet valve.

The consequence of this is that the unheated much larger amount of air the small heated air part cools down again, so that not with certainty of Start, but only after a long period of time self-ignition can occur. It is It has therefore also been proposed to provide a compressor for the purpose of starting. which compresses the intake air so strongly that it has a higher temperature and thereby starting and ignition is made easier.

In contrast, the method for starting injection internal combustion engines is characterized using a flame heating the starting air according to the invention, that only the required for starting, in a known manner by a Flap or the like. Adjustable air volume on the one arranged below an air receiver Jet flame burner past through a line connecting above the shut-off valve in the. Cylinder is sucked while. the excess amount of air in the after outside closed upper part of the transducer remains and from the burner to is warmed up for the next suction process.

It is therefore always only warmed air during the first suction process sucked in and then further preheated air pushed in; so no cooling can be done through the wall parts. In this way it will be in all circumstances Autoignition achieved when starting from a cold state and that too Starting relatively heavy connecting machines up to manual starting is easier.

While so far for starting from the cold state discharge pressures depending on the size of the machines from 1 up to 5 atm qo. needed, it is now possible to get by with pressures that do not even reach half.

The. Little, with each stroke in, the cylinder introduced and already The amount of heated air becomes light up to self-ignition when starting and idling heated, whereupon with the load a corresponding, gradually increased Air volume for suction: reached. .

Instead of an ordinary flap, a Flap in connection with a slotted slide as a throttle device for the suction Air volume provided when starting and for operating any number can be set up by cylinders.

The drawing shows an embodiment of such an outlet device illustrated schematically for a single cylinder machine.

The cylinder -Q is with the inlet port b, your outlet port e, the inlet and outlet. valves d, e and provided with the injection nozzle f.

At the air inlet port b is a by means of the line a. Air receiver g connected. With the flap k, the line n can be removed from the outer mouth of the Be completed with the air receiver. Below or on the air receiver The outer mouth is a source of warming in the form of a be-uzin, alcohol or similar burner! provided, which is fed from a small connected container k.

The line n with the transducer g can from the suction line m through a flap o, a slide o. The like. Shut off during normal operation will.

To start the suction line m must be shut off, while the Flap o is opened. Provided that the entire intake air through the line n of the machine is to be supplied, the suction line m is dispensable.

Depending on the setting of the flap k, the first suction is the air heated by the burner i is sucked into the cylinder via the valve d, while in the time from the first to the second suction stroke that is present in the container g Air warmed and on the second intake stroke with the one mentioned by the burner i Air is introduced into the cylinder. This repeats itself until the machine dies Start-up period behind ". Then either the flap o is closed and the normal suction line m is released for suction, or, if none special suction line m is provided, with increasing load the flap k turned back until it rests against the wall of the Aufnehmersg. so that the full Intake air can flow into the cylinder through the valve d.

Claims (1)

P.ATENT-ANSPRUCII Method for starting injection internal combustion engines with self-ignition using a jet flame which warms up the starting air, characterized in that only the amount of air required for starting, which can be controlled in a known manner by a flap (h) or the like an Luftauftiehzners (g) arranged. Stab flame burner (i) is sucked past through a pipe (s) connected to the upper part of the butterfly valve and into the cylinder (a), while the excess amount of air remains in the upper part of the sensor, which is closed to the outside and is heated by the burner until the next suction process.