DE29600060U1 - Intake pipe for supercharged and self-priming internal combustion engines - Google Patents

Description

Description

Intake pipe for turbocharged and naturally aspirated combustion engines.

Intake pipes commonly used in combustion engines create the connection between the air filter and the carburetor/injection or cylinder head and mixture generator.

In supercharged combustion engines, they also represent the gas-tight connection between the pressure side and the suction side between the charger and the atmosphere or between the air filter and the intercooler.

Depending on the intended use and thermal load, these pipes are made of metal or plastic. Intake pipes make a significant contribution to the tuning of an internal combustion engine. Their length, shape and diameter essentially determine the flow speed and resonance vibrations in the intake tract. In order to get the internal combustion engine to develop good power and produce environmentally friendly exhaust emissions over the widest possible speed range, manufacturers are forced to make compromises. In addition, the efficiency of the combustion depends on the turbulence of the fresh gases at the moment of ignition. If the turbulence is insufficient, this results in poor combustion.

(from; Ludwig Apfelbeck, Ways to the high-performance four-stroke engine, Motor Buch Verlag Stuttgart 1991, 11th edition pages 26 to 31, ISBN 3-87943-578-2).

The invention specified in claim 1 is based on the problem of creating an intake pipe which is able to optimize the filling level of an internal combustion engine in every possible speed range in such a way that exhaust gas behavior, economy and performance are positively influenced.

These problems are solved with the features listed in claim 1.

The invention ensures that in self-aspirating combustion engines the charge movement (turbulence) can be significantly intensified by the spiral-shaped rotation of the mixture jet in the intake manifold. In addition, the flow speed increases at low speeds and with the throttle valve fully open. In addition, depending on the pressure difference, the negative pressure in the intake manifold can be positively influenced by the mixture jet in order to intensify the intake process. In the case of supercharged engines (exhaust gas turbocharger, compressor, etc.) there are further advantages. For example, the inertia of the rotor in the exhaust gas turbocharger and the associated response time can be significantly reduced by adjusting the flow speed in the intake manifold by the rotating and pulsating mixture jet.

In supercharged engines, which may also have an intercooler, the advantage is that the compressed fresh gas column cools down further due to the relatively small outlet opening and the associated low temperature of the mixture jet, which has the following effects:

1. Power and torque increase

2. The average working pressure can be set higher from the outset

3. Both boost pressure and compressor power can be reduced

4. The thermal load is reduced

Another advantage is that the lean running limit of four-stroke engines can be extended depending on the turbulence.

A further embodiment of the invention is specified in claim 2,

The control disk, which is mounted so that it can rotate in the control housing, regulates the flow rate or pulsating flow required for the operating state of the combustion engine by means of the corresponding speed as required. These flow fluctuations additionally support the conditional oscillation of the gas column, which allows the filling level of the combustion chamber to be optimized.

An embodiment of the invention is explained with reference to Figures 1 to 5. They show :

Fig. 1 the outer and inner tubes joined together in half section Fig. 2 the outer tube as a developed view.

Fig. 3 the control disc and the control housing as an exploded view.

Fig. 4 the control disc as a top view.

Fig. 5 the control disc as a sectional view.

Figure 1 shows the outer tube (4) with the milled spiral groove (9) and the rotatably mounted inner tube (5) with the milled transverse groove (6). The spiral groove opens into the connection piece (3) on the inlet side (1) and is closed at the outlet side (2) at the end of the connection piece. During one rotation of the inner tube (Ei), the intersection point (8) of the two grooves moves from the inlet side (1) to the outlet side (2), i.e. the diagonal groove in the development (Figure 2) acts as a "rail" for the compressed gas mixtures. The diagonal groove (9) must be dimensioned according to the air requirement and maximum flow speed. In order to limit the manufacturing effort, this groove should be milled through (10) and then closed with a precisely fitting pipe. The inner tube {5} can also be driven by compressed air via a nozzle (7) and a milled or shrunk-on impeller (10.1).

The necessary bearing of the inner tube (5) should preferably be carried out at the ends of the outer tube (4) using gas-tight bearings.

The rotation of the control disk (13) in the control housing (11) can be carried out either by the engine speed or by a separate electric motor. The drive pin (14) is used to hold the bearings (19) and sealing rings (20) as well as the control disk (13) itself and a drive disk. The housing cover (12) is used to hold the nozzles (15, 17) and carries the upper bearing with sealing ring. The inlet nozzles (16, 18) for the compressed gas mixtures are located on the underside of the control housing (11). Figures 4 and 5 show the control disk with the necessary profile cutouts (22, 23) for generating the pulse. The control disk is attached to the pin by shrinking or pressing using an undersized bore {21K The bores for the shock pulses (24) are divided in such a way that the grooves for the pressure pulses (22, 23) intersect at their 90 degree angle of rotation over the 180 or 360 degree area (25).

Claims (2)

Protection claims { Two-part version ) 1 . Intake pipe for turbocharged and naturally aspirated combustion engines. Made of plastic or metal for conveying gas mixtures from the air inlet to the mixture generator and to the cylinder inlet, characterized, that compressed gas mixtures are supplied in jet form to the rotating inner tube (5) with milled transverse groove (6) at the conditionally continuous intersection point (8) via the spirally milled groove (9) in the outer tube (4). 2. Intake pipe according to claim 1, characterized in that that the pressure of the compressed gas mixtures and the number of shock pulses per revolution are regulated by the profiles (22,23,24) of the driven control disk (13) in the gas-tight control housing (11).