DE3121193A1 - Motor vehicle driven by an internal combustion engine - Google Patents

Description

2 May 7, 1981

WpI. Ing. H. WefckMM, Dipl.-Php; fr. K. Find Dipl. Ing. F. A. Weidtnun, Dipl. Cfx *. & Huber

Dr.-Ing. H. Uski Wa M & hlsfnfie 22, 8000 MOndwn M

FA.107

FIAT AUTO S.p.A.

Corso Giovanni Agnelli 200

Turin, Italy

Motor vehicle powered by an internal combustion engine

The invention relates to an engine driven by an internal combustion engine Motor vehicle with mechanical auxiliary units.

In modern motor vehicles, the internal combustion engine drives a number of mechanical auxiliaries. These include, for example

- the water pump for engine cooling,

- the lubricating oil pump,

- the oil pump for the power steering

- and the compressor for the vehicle's air conditioning system.

These aggregates are generally driven by the shaft of the internal combustion engine driven with the help of belts, gear drives and transmissions, which in most cases are bulky, are complicated and not reliable enough.

The direct drive of the auxiliary units by the engine also leads to a considerable loss of power and to greater fuel consumption.

The invention is based on the object of designing a motor vehicle with mechanical auxiliary units so that the aforementioned Disadvantages are avoided.

This is achieved according to the invention by

- One that can be driven by the exhaust gases of the internal combustion engine Turbine,

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- an electric generator coupled to the turbine

- As well as at least one electric motor, which is coupled to one of the mechanical auxiliary units and with means its connection to the generator is equipped.

This eliminates the need for complicated transmission mechanisms to Drive the auxiliary units. In addition, the auxiliary units of the motor vehicle driven by the residual energy contained in the exhaust gases, which increases the overall thermodynamic efficiency improved and fuel consumption reduced.

According to a preferred embodiment of the invention the motor vehicle further includes

- a supercharging compressor for the internal combustion engine

- as well as an electric motor coupled with this, which with Means is equipped for its connection to the generator.

Because of these features, the operation of the compressor is independent of that of the turbine. The internal combustion engine for the drive of the vehicle can thus be charged on the basis of much more elastic criteria than this is the case with the supercharging of turbo engines of the conventional type, in which the turbines and the compressor are direct and mechanically linked by being keyed on the same shaft.

The invention is explained in more detail below with reference to the drawing:

The single drawing shows a schematic plan view of the front section of a motor vehicle A. A turbine 1 is known The design is by means of an open flange 2 with the exhaust line of an internal combustion engine (not shown) tied together.

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The turbine 1 has a tangential helical line 3, a rotor 4 and an axial line 5 for the Emission of the exhaust gases.

The rotor 4 is keyed onto a shaft 6 which is non-rotatable is connected to the rotor of an alternator 7. The latter includes rectifiers and can deal with a lot rotate at high speed.

The positive pole 16 of the alternator 7 is connected by a cable 17 to electric motors 9, each of which drives an associated mechanical auxiliary unit.

The pole 16 of the alternator 7 is also connected to an electronic processor 10 via a cable an electric motor 11 controls which is connected to a supercharging compressor 1? is coupled. The supercharging compressor 12 has a rotor 13 keyed onto the shaft 15 of the motor 11 and an axial conduit 19 connected to the intake manifold of the vehicle's internal combustion engine.

The exhaust gases from the internal combustion engine drive the turbine 1 and are expelled through the axial line 5.

The turbine 1 drives the alternating current generator 7 coupled to it via the shaft 6.

The electrical energy generated by the alternator 7 is sent via the cable 17 to the electric motors 9 for the mechanical auxiliary units (water pump, oil pump, etc.) as well as to other electrical equipment (not shown), e.g. headlights, windshield wipers and the rear window heater transfer.

In conventional motor vehicles, these electrical consumers are fed by a generator that is powered by a Belt is driven by the shaft of the vehicle engine.

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This generator is superfluous in the motor vehicle according to the invention, since the alternator 7 is so dimensioned may be that it is all for the engines 7 of the mechanical auxiliary units and those normally in the motor vehicle can supply existing electrical consumers with electrical energy.

Like conventional motor vehicles, the vehicle according to according to the invention also a battery 8 connected to the alternator 7 for storing the supplied to it electrical energy and for supplying the relevant consumer when supplied by the alternator 7 is not sufficient.

The processor 10 is used to control the motor 11 as a function the running condition of the vehicle.

The connection between the turbine 1 and the supercharging compressor 12 is an electrical connection. This allows various not inconsiderable disadvantages are avoided that occur when between the turbine and there is a mechanical connection to the supercharging compressor, as is usual with the currently used turbo engines is.

In particular, the electric operation of the supercharger allows 12, which is connected to the battery 8 via the processor 10, a high engine boost pressure even if - such as after a rapid delay - the power delivered by the turbine because of the decrease the exhaust gas flow emitted by the internal combustion engine is considerably reduced.

The invention is of course not restricted to the exemplary embodiment described above. So can for example the electrical connection between the turbine 1 and the supercharging compressor 12 also in motor vehicles

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be used in which the mechanical auxiliaries are driven by the shaft of the internal combustion engine in a conventional manner driven by mechanical transmissions.

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Claims (3)

ι ο 1 1Q Claims .j Vehicle powered by an internal combustion engine with mechanical auxiliary units,
marked by - A turbine (1) that can be driven by the exhaust gases of the internal combustion engine, - an electric generator (7) coupled to the turbine - As well as at least one electric motor (9) with a the mechanical auxiliary units coupled and with means (17) is equipped for its connection to the generator (7). 2. Motor vehicle according to claim 1,
marked by - A supercharger (12) for the internal combustion engine - as well as an electric motor coupled to this (11) which is equipped with means (17, 18) for its connection to the generator (7) » 3. Motor vehicle after. Claim 2, characterized in that switching means (10) are provided through which the with the supercharging compressor (12) coupled electric motor (11) depending on the running condition of the vehicle can be selectively connected to the generator (7) 4 "Motor vehicle according to one of the preceding claims, characterized in that one of the generator (7) rechargeable battery (8) is provided.