DE3529538A1 - Internal combustion engine for motor vehicles of all types, suitable for all cylinder arrangements - Google Patents

Abstract

The internal combustion engine is a compromise solution of 2-stroke and 4-stroke processes. This combines the advantages of the 2-stroke process (such as, for example, one working stroke per crankshaft revolution, no valve gear and economic manufacture) with the advantages of the 4-stroke process (such as, for example, no open charge cycle, no scavenging losses, engine braking, crankshaft with slide bearings in separate crankcase and no lubrication losses). This is achieved by a crankshaft drive in a standard 4-stroke Otto engine housing, on which a stepped cylinder with stepped piston is located. In the lower, wide part of the cylinder the fuel/air mixture is drawn in through a diaphragm and precompressed. When it has reached a certain pressure, the mixture is forced through a non-return valve and a transfer port into the upper, narrower cylinder, where it is again compressed and then ignited. During the working cycle the precompression cylinder draws in fresh fuel/air mixture.

Description

The invention relates to an internal combustion engine according to the preamble of claim 1.

The internal combustion engine combines both Advantages of a four-stroke Otto engine as well Advantages of a two-stroke Otto engine.

Advantages of the four-stroke Otto engine:

• - no open gas exchange
• - no flushing losses
• - engine brake
• - Sliding crankshaft in a separate course belhaus;
• - no loss lubrication

Advantages of the two-stroke Otto engine:

• - one work cycle per crankshaft revolution
• - very few moving parts
• - cheap to manufacture

The invention is based, the Mo to make it as simple as possible to be able to manufacture as cheaply as possible and one to achieve optimal efficiency.

This task is characterized by the characteristic male solved according to claims 1-3.  

The internal combustion engine combines both the Vor parts of the 4-stroke gasoline engine as well as those of the 2-stroke Otto Motors.

This is done by the two-part cylinder (with different diameter stepped piston), the Ver seal and the working cylinder; in the working cylinder there is an overflow channel with a setback valve that compresses that from the compression cylinder fuel air mixture into the working cylinder directs. Is sucked in in the compression cylinder a membrane and ejected in the working cylinder through an outlet slot.  

1. Work and suction

Combustion in the working cylinder - membrane in the Compression cylinder opens due to negative pressure (Fuel-air mixture flows in).

2. Eject and aspirate

Exhaust slot becomes free - (burned gas can escape through overpressure in the working cylinder and builds high gas speeds in the exhaust manifold on the additional emptying of the Working cylinder is required). Compaction cylinder draws in fuel-air mixture.

3. Compact

Step piston moves upwards - compression cylinder reduces compression space - overpressure arises - membrane closes. At a certain overpressure (depending on the valve spring) opens Check valve and leaves mixture in working cycle flow more easily.

4. Ignite

The ignition is switched on between 30 ° C and 10 ° C before TDC headed. Check valve (mixture overflow valve til) closes as soon as the combustion pressure increases ker than the pressure in the compression cylinder.

Claims (3)

1. Internal combustion engine for motor vehicles of all kinds, suitable for all cylinder arrangements, characterized in that the crankcase, the crankshaft and the connecting rod of a conventional Otto 4-stroke engine can be used, but the piston is a stepped piston, the cylinder in two parts, from compression - And working cylinder, and in the cylinder head of the overflow channel from the Ver compression cylinder opens. 2. Piston according to claim 1, characterized in that it is a rotationally symmetrical Step piston (lower diameter larger than upper Diameter) with a flat piston crown. The upper Piston part is the so-called working piston, the lower part of the compression pistons. 3. Cylinder according to claim 1, characterized in that it is a two-part cylinder, the compression cylinder and the working cylinder.

• 3.1 In the compression cylinder is the inlet slot through which the membrane-controlled fuel air mixture passes.
• The working cylinder contains an overflow channel that connects the compression cylinder to the cylinder head, in which there is a check valve in the lower third, which opens at a certain pressure.
• Furthermore, the working cylinder contains the outlet channel, which first releases the exhaust gases into a tube of a certain length in order to achieve a high suction effect and then leads to conventional silencers.
• Due to the high suction effect of the exhaust system, a vacuum is created in the cylinder, which empties it down to minimal residual gas quantities.
• 3.2 check valve according to claims 1-3, characterized in that it is located at the start of the overflow channel and works as follows:
• Check valve opens when the intake air-fuel mixture in the compression cylinder, which can no longer escape through the diaphragm-controlled inlet slot, is compressed by the piston going upwards and the pressure in the working cylinder is lower than the pressure in the compression cylinder.
• Check valve closes when the fuel-air mixture expands abruptly after the initiation of the ignition process and a very high combustion pressure is detected in the working cylinder.