DE2803954A1 - COMBUSTION ENGINE - Google Patents

Description

HOFFMANN · EITLE & PARTNER

PAT E N TAN WALTE 28Q3954

DR. ING. E. HOFFMANN (1930-197 (5) · DIPL-ING. W.EITLE. DR. RER. NAT. K. HOFFMAN N · D! PL.-ING. W. LEHN

DIPL.-ING. K. FDCHSLE DR. RER. NAT. B. HANSEN ARABELLASTRASSE 4 (STERN HAUS) D-8000 MDNCH EN 81 TELEFON (089) 911087 TELEX 05-29619 (PATHE)

3 30 163 ρ / er

Ham Mezaki

Internal combustion engine

The present invention relates to a new and improved internal combustion engine, having at least one Combustion chamber which is operated according to a cycle consisting of an intake stroke for introducing a fuel-air mixture into the combustion chamber, a compression stroke for the compression of the introduced mixture within the combustion chamber, an explosion stroke for burning the compressed mixture within the combustion chamber and a Exhaust stroke for exhausting the combustion gas from the combustion chamber.

909814/0597

So far, the known internal combustion engines, including piston-stroke engines and rotary piston engines, there are significant restrictions in terms of air pollution subject. This resulted in expensive engines with various complicated attachments. Likewise were due to these strict restrictions or restrictions, the performance and the fuel consumption are unfavorable influenced. In addition, the power of the machine was partially used to operate the cooling system, see above that the performance or the utilization of the power has been influenced in a similarly unfavorable manner. It is therefore desirable to eliminate a special cooling system in an internal combustion engine.

Therefore, the object of the present invention is to provide a new and improved internal combustion engine of the initially mentioned called genus, which would overcome the significant restrictions on air pollution without the Eliminated the need for additional complicated instruments.

The invention solves this problem by what is evident from the claims resulting features. In particular, the internal combustion engine is improved by introducing a from the fuel-air mixture different gaseous substance into the combustion chamber, after which this gaseous Substance is discharged again. This process occurs after the exhaust stroke of one cycle and before the intake stroke of the next Cycle.

This solution has a number of advantages:

1. Because of the engine during the additional strokes after the exhaust stroke A respite or rest is allowed, so are the engine and the instruments that work with it less stressed, so that the service life

90 & 8U / 0597

is increased. In addition, the innovation creates more cost-effective engines in connection with reduced costs for the manufacture and maintenance.

2. Since the combustion chamber is flushed and cleaned by the fresh air that is not used for combustion, this can take place in the Combustion chamber introduced fuel-air mixture less by the remaining combustion gases in the combustion chamber polluted, resulting in higher combustion efficiency and a leaner mixture. this in turn leads to a reduced fuel consumption. The higher combustion efficiency results in an im essentially complete combustion, so that the emitted substances such as CO and hydrocarbons (HC) in the emitted Combustion gas can be reduced. Carbon deposits can also be reduced, whereby the service life of the motors is increased.

3. Because the combustion chamber works effectively by not doing the combustion Fresh air serving is cooled, the temperature of the combustion chamber can be kept low during the explosion stroke in order to significantly reduce the NO content in the exhausted combustion gas. In addition, can be in accordance with the present invention, the combustion chamber can be sufficiently cooled so that no special cooling system is required is required. This results in an inexpensive and compact internal combustion engine with reduced Weight and reduced maintenance. The efficiency can also be improved as a result of the cooling system.

4. Finally, with the present invention, the internal combustion engine with regard to the drive in low speed ranges and with regard to the Start-up and warm-up time, can be improved. It is also possible to use raw fuel.

Ö098U / 0597

Thus, the new and improved internal combustion engine can be more durable with better performance and a lower fuel consumption.

Further details, features and advantages of the invention emerge from the following description of the FIGS accompanying drawings purely schematically illustrated embodiments. Show it:

FIG. 1 is a schematic sectional view of a combustion chamber of an internal combustion engine corresponding to FIG present invention, and

FIGS. 2A to 2D show an operating sequence of the machine corresponding to FIG. 1.

1 shows a combustion chamber 10 which has an inlet opening 11 leading to a carburetor (not shown) and an outlet opening 12 leading to an exhaust pipe (not shown). The inlet port 11 and the outlet port 12 are controlled by valves 13 and 14, respectively. Slidably movable piston 15 is received by combustion chamber 10. Such an arrangement is known in the art and further description is unnecessary.

In accordance with the present invention, a further inlet port 16 is provided in the combustion chamber 10 to a gaseous substance that differs from the usual fuel-air mixture, such as fresh air, to be introduced into the combustion chamber 10. The inlet port 16 is controlled in a similar manner by means of a valve 17.

2A shows the end of an exhaust stroke during a cycle in which the piston 15 is essentially its reached top dead center and the combustion gas through the

9098U / 0597

opened outlet opening 12 ejected from the combustion chamber 10 will. The piston 15 is then downwards from its top dead center as shown in FIG. 2B emotional. At this point in time, the additional inlet opening 16 is open to allow one of the fuel-air mixture distinguishing gaseous substance such as fresh air. to be introduced into the combustion chamber 10. Likewise the inlet and outlet openings 11, 12 are closed by means of the valves 13 and 14, respectively. The fresh air introduced serves to cool the combustion chamber 10. When the piston 15 is moved up again as shown in Fig. 2C, both inlet openings 11 and 16 by means of of the respective valves 13 and 17 closed and the outlet opening 12 for draining the non-combustion open to fresh air. As a result, the combustion gas remaining in the combustion chamber 10 is discharged therefrom, namely together with the fresh air which is discharged through the outlet opening 12. The combustion chamber 10 is in this respect effectively flushed and cleaned by the fresh air that is not used for combustion.

Fig. 2D shows the intake stroke of the next cycle in which the outlet port 12 and the additional inlet port through the valves 14 and 17 are closed and the inlet opening 11 is open to the fuel-air mixture through this inlet port to be introduced into the combustion chamber 10 as a result of the downward movement of the piston 15.

Then, as usual, these strokes are repeated as compression and explosion strokes in the combustion chamber 10.

So there are additional suction and discharge strokes after the discharge stroke a four-stroke cycle is provided so that the combustion chamber is introduced into and out of the combustion chamber

9098U / 0597

this discharged / non-combustion fresh air is cooled and purged.

Of course, there is no ignition during these additional strokes. The additional strokes can be increasing be repeated in one cycle after the ejection stroke of the same.

The present invention is not restricted to the combustion chamber shown, but can be applied to all four-stroke internal combustion engines can be used, such as gasoline engines, diesel engines, oil engines and rotary piston engines fools.

8098U / 0597

Claims (3)

HOFFMANN · EITLE & PARTNER DR. ING. E. HOFFMANN (1930-1976) DIPL-I NG. W. EITLE · D R. RER. NAT. K. HOFFMAN N · D I PL.-I NG. W. LEH N DIPL.-ING. K. FOCHSLE DR. RER. NAT. B. HANSEN ARABELLASTRASSE 4 (STERNHAUS) D-8000 MÖNCH EN 81 TELEPHONE (089) 911087 TELEX 05-29619 (PATH E) 30 163 ρ / er Ham Mezaki Internal combustion engine Claims 1 / internal combustion engine with at least one combustion chamber, which is operated according to a cycle consisting of an intake stroke for introducing a fuel-air mixture into the combustion chamber, a compression stroke for the compression of the introduced mixture within the combustion chamber, an explosion stroke for burning the compressed mixture within the combustion chamber and an exhaust stroke for Ejection of the combustion gas from the combustion chamber consists, characterized by additional strokes for introduction a gaseous substance different from the fuel-air mixture into the combustion chamber (10) and through Discharge of this substance from the combustion chamber (10) between the exhaust stroke of the cycle and the intake stroke of the next Cycle. 2. Internal combustion engine according to claim 1, characterized characterized in that the combustion chamber (10) has an inlet opening (11) for introducing the fuel-air mixture into the combustion chamber (10), a further inlet opening (16) to 9098U / 0597 Introducing the gaseous substance into the combustion chamber (10) and an outlet port (12) for discharging the combustion gas and the gaseous substance from the combustion chamber (10) having. 3. Internal combustion engine according to claims 1 or 2, characterized in that fresh air is used as the gaseous substance. 90981 k / 0597