Internal combustion engine with a turbocharged and method of operation of this engine

 

The invention relates to the field of engine development and allows to increase the efficiency of the engine without compromising its operational reliability. Internal combustion engine with a turbocharged equipped with an additional device for converting energy of exhaust gases, which gives created in him the power of the crankshaft of the engine to improve efficiency. As a device for converting energy of exhaust gases is provided by the steam generator (3) and steam turbine generator (4) with steam turbine (9) connected to the crankshaft (20) of the engine 2. The steam generator (3) contains the boiler (6), which passes through the mass flow of exhaust gases from the turbocharger (1) and from which at least the main part of the generated steam is supplied to steam turbine (9). Steam turbine generator (4) comprises a capacitor (10) and to increase used in the steam turbine (9) teleperedach provided cooling tower (16). The steam generator (3) and steam turbine generator (4) connected with closed circuit water circulation, thus supplying condensate from the condenser (10) in the vessel (5) to the feed water circuit water use is saturninum supercharged energy loss of the exhaust gas is used to create additional capacity, what of the mass flow coming from the turbocharger (1), take the energy of the steam generator (3), at least a predominant part of the generated steam down in the steam generator (4) and thus established the power transmitted to the crankshaft (20) of the engine (2). 2 N. and 6 C.p. f-crystals, 2 Il.

The invention relates to an internal combustion engine with a turbocharged, equipped with a device for converting energy of the exhaust gas, which is created gives it the power of the engine to increase its efficiency, and to a method of operating such an engine.

Such internal combustion engines with turbocharging known for example from patent DE-PS 962764. Here, the device for converting energy of exhaust gases consists of the power turbine, which with excess capacity in the exhaust gas is connected in series with the main turbine of the turbocharger and connected through a kinematic transmission with switchable coupling to the drive shaft of the engine, i.e. to the crankshaft in order to give the shaft mechanical energy, which became available excess capacity of the exhaust gas.

Setting a goal is bot so-called turbocompounding system, which allowed better use of the energy of exhaust gases, making it possible to increase the effective efficiency of the internal combustion engine with supercharging.

For this purpose, the internal combustion engine with turbocharger, a turbine which is connected to the exhaust manifold of the exhaust gas, and the compressor to the manifold charge air turbine wheel and impeller of the compressor planted on the same shaft, and which has such high efficiency that can manifest excess capacity of the exhaust gas, which does not require the amount of air required for the formation of an optimal coefficient of excess air in the engine cylinder before the turbocharger from the flow of exhaust gas is branched off some applied a small additional turbine.

This additional turbine through a special gearbox, a combination of the planetary gear, step-down gear and overrunning clutch, connected to the crankshaft of the engine, allowing the generated power can directly pass the crankshaft.

To fence exhaust before the turbo is the efficiency of the engine, created by the engine power is reduced by the value created turbocompounding system. While remaining essentially the same useful power, i.e., constant full power of the engine, due turbocompounding system primarily achieved improvement in specific energy consumption, i.e., the effective efficiency.

The objective of the invention is the creation of an internal combustion engine with a turbocharged, equipped with an additional device for converting energy of the exhaust gases, which gives created in him the power of the crankshaft of the engine to improve efficiency without compromising reliability of the engine and additional fuel consumption.

The problem is solved in that the internal combustion engine with a turbocharged, equipped with an additional device for converting energy of exhaust gases, which gives created in him the power of the crankshaft of the engine to improve efficiency, according to this technical solution as a device for converting energy of the exhaust gas, is provided by the steam generator and protourban is passing through the mass flow of exhaust gases from the turbocharger and from which, at least the main part of the generated steam is supplied to the steam turbine, with the steam-turbine unit includes a capacitor and to increase used in the steam turbine of teleperedach provided by the cooling tower, and the steam generator and the steam turbine unit is connected with a closed loop water circulation, thus supplying condensate from the condenser to the vessel for feed water circuit water uses exhaust heat of the engine.

It is appropriate that the steam turbine is connected directly to the crankshaft of the engine.

Also advisable is that a steam turbine connected to the generator rotor and the generator through an elastic coupling is connected to the crankshaft of the engine.

It is preferable that the steam through the turbine of the planetary gear and low gear and overrunning clutch connected to the crankshaft of the engine.

Also, it is preferable that the steam generator is a small fraction of the generated steam is diverted to internal power, who are in need of organs of the engine.

The invention is also a method of operation of the internal combustion engine and gas turbine nadd is dinasti and additional fuel consumption.

This object is achieved in that in the method of operation of the internal combustion engine with a turbocharged in accordance with this technical invention, the energy loss of the exhaust gas is used to create additional capacity, for which the mass flow coming from the turbocharger, take the energy of the steam generator, at least a predominant part of the generated steam down in the steam turbine unit and the power transmitted to the crankshaft of the engine.

It is reasonable that a small share of the generated steam is used to power internal, who are in need of organs of the engine.

It is preferable that the exhaust heat from high-temperature circuit engine used for preheating the feed water in the steam generator.

In contrast to the prior art according to the invention the power, additionally created by means of the steam turbine unit, is obtained not by selection of exhaust gases before the turbocharger (primary energy extraction), and uses the energy of exhaust gases in the direction of flow of these gases after the turbocharger (secondary energy extraction).

Thanks tomaple and the energy is converted into mechanical power through a steam turbine, no change to the system of the turbocharger, so that there is no feedback effect on the working process of the internal combustion engine.

Due to the fact that in the circuit water circulation is provided by the device for heating the feed water, which you can use exhaust heat from high-temperature circuit engine, achieved a further increase in efficiency of the steam turbine unit.

A particular advantage of feed water preheating in an additional device for converting energy of exhaust gases in patented the internal combustion engine with pressurization is that you want to allow only a relatively small proportion of steam generated by the steam generator, through which feed water preheating and internal in need of organs, such as heating fuel for the engine.

In order to achieve high output power, the steam leaving the steam turbine, it is necessary to condense to the lowest possible temperature level. According to a preferred example of execution of the invention it is advisable to carry out by approx the tarn and step-down transmission, including overrunning clutch directly to the crankshaft of the internal combustion engine or rotor of the generator, such as generator three-phase current, which is then connected by an elastic coupling with an internal combustion engine, there is no need in additional costs, for example on a separate generator, including complex and numerous control and regulating device.

Below the invention is described on the example of two suitable types of performance. In the diagrams, in particular, it is shown:

in Fig.1 is a system where additional capacity of the steam turbine unit is given directly to the crankshaft of the internal combustion engine;

in Fig.2 is a system where additional capacity steam turbine is given the crankshaft of the internal combustion engine via the generator.

In Fig.1 shows the principle of operation of the internal combustion engine 2 with the boost from the turbo compressor 1 driven in rotation by the engine 2 by the generator 30 (for example, the generator three-phase current), with the steam generator 3 and the steam turbine unit 4.

The turbocharger 1 is known (and therefore not shown) parts - turbines operating on the exhaust gases, and a compressor adovocates air motor 2. Turbine wheel and impeller of the compressor included in the turbo compressor 1, planted on a common shaft. Number 20 marked the crankshaft of the engine 2.

The steam generator 3 consists of a boiler 6, through which the pipes 7a, 7b passes the mass flow of exhaust gases from the turbocharger 1, then produced in the flue pipe 8, and the evaporator 11.

Steam turbine unit 4 consists of a steam turbine 9 and the condensation chamber 10. Steam turbine 9 gives her own power through automatically operating overrunning clutch 21 and the gear 22 of the planetary and decreasing transmission directly to the crankshaft of the engine 2.

Steam generated in the boiler 6, passes through the steam line 12 to the steam turbine 9. From the steam turbine 9 expanded steam gets through the pipe 13 into the condenser 10, where the condensate is fed by pump 14 into the reservoir 5 of the feed water. The feed water pump 14 pumps the condensate to the evaporator 11, where the pump 15 displays the hot water in the boiler 6, where its temperature is further increased, after which it returns to the evaporator 11, where it vaporizes.

Vacuum arising in the condenser 10 in the deposition of the pair, is determined by end-point expansion in the steam turbine 9. The deeper the vacuum, bolia process.

In order to achieve high output power in a steam turbine 9, it is necessary vapor released from the turbine 9, condensing on the lowest level possible temperature, for what it is expedient to provide for the cooling tower 16. Here the cooling medium (water) is cooled to the initial temperature. The steam generator 3, it is expedient to provide closed loop water circulation, so that it was possible to compensate the loss of circulating water pre-treated water which can be introduced into the circulation through the channel 17.

In this example of execution provided for removal of the steam generator 3 small fraction of the generated steam to power the internal needy bodies 50 of the engine 2.

While supplying the capacitor of the capacitor 10 in the vessel 5 to the feed water uses exhaust heat from high-temperature circuit 40 of the engine. Of course, heating can also enhance some part of the amount of steam generated in the steam generator, as indicated by line 60.

Using the above elements, patent-pending internal combustion engine with pressurization, preferably diesel, and patent-pending method of operation of this engine, it becomes possible optimal transformed the eye in need of it body or bodies, thanks to the crankshaft of the engine is achieved higher overall power than the rated power without compromising reliability and without additional fuel consumption.

In Fig.2 shows a second example of execution that is different from the first (Fig.1) only in that the steam turbine 9 created gives it power to the rotor 60 of the generator 30 through automatically operating overrunning clutch 21 and the gear 22 of the planetary and step-down transmission. In a known manner the crankshaft 20 of the internal combustion engine 2 is connected to the generator 30 by means of a flexible coupling 61. A particular advantage of this variant is that it decreases the loading of the steam turbine vibrations of the engine.

Claims

1. Internal combustion engine with a turbocharged, equipped with an additional device for converting energy of exhaust gases, which gives created in him the power of the crankshaft of the engine to improve efficiency, characterized in that the device for converting energy of exhaust gases is provided by the steam generator (3) and steam turbine generator (4) with steam turbinata the mass flow of exhaust gases from the turbocharger (1) and from which, at least the main part of the generated steam is supplied to steam turbine (9), steam turbine generator (4) comprises a capacitor (10) and to increase used in the steam turbine (9) teleperedach provided cooling tower (16), and the steam generator (3) and steam turbine generator (4) connected with closed circuit water circulation, thus supplying condensate from the condenser (10) in the vessel (5) to the feed water circuit water uses exhaust heat of the engine (2).

2. The engine under item 1, characterized in that the steam turbine (9) is connected directly to the crankshaft (20) of the engine (2).

3. The engine under item 1, characterized in that the steam turbine (9) is connected with the rotor (60) of the generator (30) and the generator (30) through an elastic coupling (61) is connected to the crankshaft (20) of the engine (2).

4. The engine under item 1, characterized in that the steam turbine (9) via a gear (22) of the planetary and low gear and overrunning clutch (21) is connected to the crankshaft (20) of the engine (2).

5. The engine under item 1, characterized in that the steam generator (3) a small fraction of the generated steam is diverted to internal power, who are in need of organs (50) of the engine (2).

6. The method of operation of the engine nucut to create additional capacity, what of the mass flow coming from the turbocharger (1), take the energy of the steam generator (3), at least a predominant part of the generated steam down in the steam generator (4) and thus established the power transmitted to the crankshaft (20) of the engine (2).

7. The method according to p. 6, characterized in that a small proportion of generated steam is used to power internal, who are in need of organs (50) of the engine (2).

8. The method according to p. 7, characterized in that the exhaust heat from high-temperature circuit (40) of the motor (2) is used for preheating the feed water in the steam generator (3).

 

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EFFECT: the invention ensures simultaneous production of electric power and synthetic liquid fuels.

2 cl, 2 dwg

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