CN102650234A - Waste heat recycling hybrid type supercharging device of gasoline engine - Google Patents

Abstract

The invention discloses a waste heat recycling composite supercharging device for a gasoline engine, which comprises an exhaust gas turbocharging device, a mechanical supercharging device, and a waste heat supercharging circulation device arranged in parallel with the exhaust gas turbocharging device; the waste heat supercharging circulation device It includes a waste heat absorption and reuse device, a steam supercharger, and a first-stage supercharger; the waste heat absorption and reuse device is a heat exchanger, the inlet of the hot side channel is connected to the radiator of the gasoline engine, and the cold source is input into the cold side channel. And the outlet of the cold side channel of the heat exchanger is connected with the inlet of the steam supercharger, and the power output end of the steam supercharger is rigidly connected with the first-stage supercharger through the first supercharging shaft, and the exhaust of the steam supercharger The gas port communicates with the cold side channel inlet of the heat exchanger through the exhaust circulation pipe. Therefore, the invention can effectively utilize the waste heat of the engine, greatly improve the power performance and fuel economy of the gasoline engine, and improve the high-speed performance and acceleration performance of the fuel engine.

Description

Gasoline Engine Waste Heat Reuse Composite Supercharging Device

technical field

The invention relates to a waste heat reuse compound supercharging device, which is applied to a gasoline engine.

Background technique

With the rapid growth of automobile production and sales, the problems of oil and other energy consumption and air pollution have attracted more and more attention from all over the world. slogan. As the core component of an automobile, the engine's fuel utilization efficiency is directly related to the energy consumption and exhaust emissions of the automobile. Advanced engine technology plays a key and decisive role in the development of automobile energy saving and environmental protection technologies.

At present, most of the existing passenger cars in our country adopt forced water cooling system. Although it can effectively cool down, the heat emitted by the radiator to the environment cannot be well utilized, and there is a certain degree of energy waste. Moreover, the turbocharging in the existing supercharging device has a hysteresis phenomenon. Although the supercharging device responds quickly, it also needs to consume a part of energy and cannot produce particularly powerful power. Especially at high speeds, a large amount of friction will be generated so that It affects the increase of engine speed, and the noise is loud.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention provides a waste heat reuse composite supercharging device for a gasoline engine. The composite supercharging device can effectively utilize the waste heat of the engine and greatly improve the power performance and fuel economy of the gasoline engine. , Improve the high-speed performance and acceleration performance of the fuel engine.

For realizing above technical purpose, the present invention will take following technical scheme:

A waste heat recycling composite supercharging device for a gasoline engine, including an exhaust gas turbocharging device and a supercharging device, and also includes a waste heat supercharging cycle device arranged in parallel with the exhaust gas turbocharging device; the supercharging device is respectively The exhaust gas turbocharging device and the waste heat supercharging circulation device are connected in series through an electromagnetic clutch; the waste heat supercharging circulation device includes a waste heat absorption and reuse device, a steam supercharger and a one-stage supercharger; the exhaust gas turbocharging device It includes an exhaust gas turbocharger and a two-stage supercharger; the waste heat absorption and reuse device is a heat exchanger, the hot side channel inlet of the heat exchanger is connected with the radiator of the gasoline engine, and the cold side channel of the heat exchanger The middle input cold source, and the outlet of the cold side channel of the heat exchanger is connected with the inlet of the steam supercharger, and the power output end of the steam supercharger is rigidly connected with the first-stage supercharger through the first supercharging shaft, and the steam The exhaust port of the supercharger communicates with the cold side channel inlet of the heat exchanger through the exhaust circulation pipe, and the air pressure control regulator is installed on the exhaust circulation pipe; the exhaust gas turbocharging device includes an exhaust gas turbocharger and In the two-stage supercharger, the intake port of the exhaust gas turbocharger is connected to the exhaust gas outlet of the gasoline engine through the exhaust gas delivery pipe, and the power output end of the exhaust gas turbocharger is connected to the two-stage supercharger through the second supercharging shaft. Rigid connection; the first-stage supercharger communicates with the gas source, while the second-stage supercharger communicates with the first-stage supercharger through a connecting air pipe, and the exhaust port of the second-stage supercharger is connected with the oil cylinder of the gasoline engine through a pipeline.

The steam supercharger, the one-stage supercharger, the exhaust gas turbocharger and the two-stage supercharger all include a chamber and an impeller mechanism installed in the chamber.

The power output shaft of the supercharging device is coaxially arranged with the second supercharging rotating shaft, and an electromagnetic clutch is installed between the power output shaft of the supercharging device and the second supercharging rotating shaft; and the power output shaft of the supercharging device It is connected with the first supercharging rotating shaft through a universal transmission device, and another electromagnetic clutch is installed between the universal transmission device and the power output shaft of the supercharging device.

The air pressure control regulator includes a pressure sensor for detecting the air pressure in the exhaust circulation pipe, and a valve controlled to open and close according to the pressure value fed back by the pressure sensor.

The heat sink is a water-low-pressure water vapor mixture critical to evaporation.

According to the above technical scheme, the following beneficial effects can be achieved:

The supercharging system of the present invention adopts three modes of exhaust gas turbocharging, waste heat supercharging circulation device and mechanical supercharging. Therefore, on the one hand, the exhaust gas discharged from the engine can be used as the starting force of the exhaust gas turbocharging device; It is also possible to use the waste heat produced in the working process of the engine as the starting force of the waste heat supercharging cycle device. The generated waste heat effectively improves the fuel economy of the engine. In addition, the present invention adopts a two-stage supercharging method, which can effectively increase the compression ratio of the engine, thereby increasing the engine power.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Among them: 1. Exhaust gas delivery pipe, 2. Exhaust gas turbocharger, 3. Exhaust gas exhaust pipe, 4. Water vapor exhaust circulation pipe, 5. Air pressure control regulator, 6. Radiator, 7. Waste heat absorption and reuse Device, 8. Water vapor intake circulation pipe, 9. Steam supercharger, 10. First supercharging shaft, 11. Supercharging intake pipe, 12. First-stage supercharger, 13. Connecting air pipe, 14. Universal Transmission device, 15. two-stage supercharger, 16. electromagnetic clutch, 17. supercharger, 18. engine intake pipe. the

Detailed ways

The accompanying drawings disclose, without limitation, the structural schematic diagrams of the preferred embodiments involved in the present invention; the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Fig. 1, the waste heat recycling compound supercharging device of the gasoline engine according to the present invention includes an exhaust gas turbocharging device, a mechanical supercharging device and a waste heat supercharging cycle device arranged in parallel with the exhaust gas turbocharging device; The mechanical supercharging device is respectively connected in series with the exhaust gas turbocharging device and the waste heat supercharging circulation device through the electromagnetic clutch 16; The exhaust gas turbocharging device includes an exhaust gas turbocharger 2 and a two-stage supercharger 15; the waste heat absorption and reuse device 7 is a heat exchanger, and the heat side channel inlet of the heat exchanger is connected to the gasoline engine The radiator 6 of the heat exchanger is connected, and the cold source is input in the cold side channel of the heat exchanger, and the cold source is a water-low pressure steam mixture critical to evaporation, and the cold side channel outlet of the heat exchanger is connected to the steam booster 9 The air inlet of the steam supercharger 9 is connected rigidly with the first-stage supercharger 12 through the first supercharging shaft 10, and the exhaust port of the steam supercharger 9 exchanges heat with the exhaust gas circulation pipe. The air pressure control regulator 5 is installed on the exhaust circulation pipe. The air pressure control regulator 5 includes a pressure sensor for detecting the air pressure in the exhaust circulation pipe and automatically controls the air pressure according to the pressure value fed back by the pressure sensor. Open and close valve; the exhaust gas turbocharging device includes an exhaust gas turbocharger 2 and a two-stage supercharger 15, and the intake port of the exhaust gas turbocharger 2 is connected with the exhaust gas outlet of the gasoline engine through the exhaust gas delivery pipe 1 , and the power output end of the exhaust gas turbocharger 2 is rigidly connected with the second-stage supercharger 15 through the second supercharging shaft; The device 15 communicates with the primary supercharger 12 through the communication air pipe 13, while the exhaust port of the secondary supercharger 15 is connected with the oil cylinder of the gasoline engine through the engine intake pipe 18.

In the present invention, the steam supercharger 9, the primary supercharger 12, the exhaust gas turbocharger 2, and the secondary supercharger 15 all include a chamber and an impeller mechanism installed in the chamber, wherein the steam supercharger The impeller mechanisms in the compressor 9 and the exhaust gas turbocharger 2 are turbine mechanisms, while the impeller mechanisms in the primary supercharger 12 and the secondary supercharger 15 are pump mechanism. The power output shaft of the supercharger is coaxially arranged with the second supercharging rotating shaft, and an electromagnetic clutch 16 is installed between the power output shaft of the supercharging device and the second supercharging rotating shaft; and the power output of the supercharging device The shaft is connected with the first booster shaft 10 through a universal transmission 14, and another electromagnetic clutch 16 is installed between the universal transmission 14 and the power output shaft of the supercharger.

The present invention drives the turbine in the exhaust gas turbocharger 2 to rotate through the exhaust gas discharged from the engine, thereby driving the pump wheel in the secondary supercharger 15 to rotate for secondary supercharging, ie EGR. When the supercharger works, the crankshaft of the engine drives the turbine in the supercharger 17 to rotate through the transmission device, thereby driving the pump wheels in the primary supercharger 12 and the secondary supercharger 15 to rotate for supercharging. Wherein, the waste heat supercharging circulation device and the exhaust gas turbocharging device are connected in parallel, and at the same time, the waste heat supercharging circulating device is connected in series with the mechanical supercharging device through the universal transmission device 14 and the exhaust gas turbocharging device through the electromagnetic clutch 16, so that the overall Form a composite booster system.

During the process of starting the car to the state of low speed and light load, since the temperature of the engine radiator 6 is not high and the temperature (energy) of the exhaust gas discharged from the rear of the car is not high, the waste heat supercharging circulation device and the turbocharging system are not very effective. A good supercharging effect will make the engine supercharging lag, so at this time, the electromagnetic clutch 16 should be used to control the coupling of the transmission shaft, so that the supercharger 17 can exert a supercharging effect, and perform primary and secondary supercharging work on the gas entering the intake pipe. , Increase engine power.

In the (medium) high-speed (medium) high-load working state of the car, due to friction and other effects, the supercharger 17 will limit the increase in engine speed and power. Therefore, at this time, the electromagnetic clutch 16 should be controlled to separate the transmission shaft, so that The waste heat supercharging circulation device plays the role of first-stage supercharging, and the exhaust gas turbocharging system plays the role of second-stage supercharging. After the two-stage supercharging, the intake air volume is increased, thereby increasing the engine power.

The gas pressure of the cold source (water vapor exhaust circulation pipe 4) is originally lower than the pressure of waste heat absorption and reuse device 7 and water vapor intake circulation pipe 8, but when a certain amount is accumulated, the air pressure will gradually increase, Then the valve of the air pressure control regulator 5 is opened, and the gas enters the waste heat absorption and reuse device 7. The temperature at the waste heat absorption and reuse device 7 is affected by the radiator 6 due to heat conduction, and is approximately the same as the temperature of the radiator 6, and the temperature is higher. At this time, the temperature of the gas is lower than the temperature of the waste heat absorption and reuse device 7, so the gas expands when heated, the pressure increases, and the pressure difference drives the rotating shaft to rotate and pressurize; since the heat will be preferentially transferred to the lower temperature, the surrounding area of the radiator 6 The air temperature is generally high, so heat collection operation is optional, but in the case of heat collection operation, the utilization rate is higher. Here, the radiator 6 and the waste heat reuse device 7 are packaged in a closed space with heat insulating material, so that the heat loss is less.

Claims (5)

1. a petrolic used heat utilizes the combined type supercharging device again, comprises exhaust gas turbocharge device and mechanical pressurizing apparatus, it is characterized in that, also comprises and the parallel used heat supercharging circulation means that is provided with of exhaust gas turbocharge device; Said mechanical pressurizing apparatus is in series through magnetic clutch and exhaust gas turbocharge device, used heat supercharging circulation means respectively; Said used heat supercharging circulation means comprises that used heat absorbs re-use device, steam intensifier and one-level pressurized machine; Said exhaust gas turbocharge device comprises exhaust-gas turbocharger and two-stage supercharger; It is heat exchanger that said used heat absorbs re-use device; The hot-side channel import of this heat exchanger is connected with petrolic radiator; And import low-temperature receiver in the cold side passage of heat exchanger; And the cold side channel outlet of heat exchanger is connected with the suction port of steam intensifier; And the clutch end of steam intensifier is rigidly connected through the first supercharging rotating shaft and one-level pressurized machine, and the relief opening of steam intensifier is communicated with the cold side channel entrance of heat exchanger through the exhaust cycle pipe, and on this exhaust cycle pipe the air pressure controlled adjuster is installed; Said exhaust gas turbocharge device comprises exhaust-gas turbocharger and two-stage supercharger; The suction port of exhaust-gas turbocharger is connected with petrolic waste gas row mouth through waste gas pipeline, and the clutch end of exhaust-gas turbocharger is rigidly connected through the second supercharging rotating shaft and two-stage supercharger; The one-level pressurized machine is communicated with source of the gas, and two-stage supercharger is connected with the one-level pressurized machine through connectivity trachea, and the relief opening of two-stage supercharger is connected with petrolic oil cylinder through pipeline simultaneously.

2. utilize the combined type supercharging device again according to the said petrolic used heat of claim 1, it is characterized in that: said steam intensifier, one-level pressurized machine, exhaust-gas turbocharger, two-stage supercharger include chamber and are installed in the impeller mechanism in the chamber.

3. utilize the combined type supercharging device again according to the said petrolic used heat of claim 2; It is characterized in that: the pto of said mechanical pressurizing apparatus and the coaxial setting of the second supercharging rotating shaft, and between the pto of mechanical pressurizing apparatus and the second supercharging rotating shaft magnetic clutch is installed; And the pto of mechanical pressurizing apparatus is connected with the first supercharging rotating shaft through universal driving device, and between the pto of this universal driving device and mechanical pressurizing apparatus another magnetic clutch is installed.

4. utilize the combined type supercharging device again according to the said petrolic used heat of claim 1, it is characterized in that: said air pressure controlled adjuster comprises pressure transducer that is used to detect the exhaust cycle intraductal atmospheric pressure and the valve that opens and closes according to the feedback pressure value control of pressure transducer institute.

5. utilize the combined type supercharging device again according to the said petrolic used heat of claim 1, it is characterized in that: said low-temperature receiver is critical water-low-pressure water steam mixture in evaporation.

Images