CN114294105B - Power turbine system providing boost compensation and torque assist and method of utilizing same - Google Patents
Power turbine system providing boost compensation and torque assist and method of utilizing same Download PDFInfo
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- CN114294105B CN114294105B CN202111376408.5A CN202111376408A CN114294105B CN 114294105 B CN114294105 B CN 114294105B CN 202111376408 A CN202111376408 A CN 202111376408A CN 114294105 B CN114294105 B CN 114294105B
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- 239000002912 waste gas Substances 0.000 claims description 4
- 238000010248 power generation Methods 0.000 abstract description 5
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- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
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Abstract
The invention discloses a power turbine system capable of providing supercharging compensation and torque assistance and a utilization method thereof, wherein the system comprises an engine, a supercharging turbine, a power turbine, a gas compressor and a motor engine unit; the supercharging turbine is arranged at the downstream of an exhaust gas outlet pipe of an engine and is used for receiving exhaust gas discharged by the engine, and an exhaust gas outlet of the engine is connected with an exhaust gas inlet of the supercharging turbine; the power turbine is arranged at the downstream of the booster turbine and used for receiving gas discharged by the booster turbine, a gas outlet of the booster turbine is connected with a gas inlet of the power turbine, and an exhaust outlet is also arranged on the power turbine and used for discharging exhaust gas; the air compressor is provided with an air inlet for receiving fresh air and pressurizing the fresh air to enter the engine, and an air outlet of the air compressor is connected with an air inlet of the engine. The system can realize the power generation of the generator through the power provided by the power turbine, and can also realize the pressurization compensation and the torque assistance.
Description
Technical Field
The invention relates to the technical field of vehicle power turbine systems, in particular to a power turbine system capable of providing supercharging compensation and torque assistance and a utilization method thereof.
Background
The requirement of the vehicle diesel engine on the air-fuel ratio is higher when the vehicle diesel engine is at medium-low speed and high load, namely, the working condition needs to wait for more sufficient fresh air inflow urgently, so that an electric supercharger is generated for supercharging compensation, the air-fuel ratio is improved, and the fuel economy of the engine is improved; under the working condition of low speed and low load, the torque of the shafting is insufficient, and an auxiliary system is required to provide torque assistance.
In the prior art, chinese patent with publication number CN 210122938U discloses an electric supercharging system and a vehicle, the electric supercharging system includes a full-time-operation turbo supercharging system and a non-full-time-operation electric auxiliary supercharging system, the full-time-operation turbo supercharging system includes a main body portion and a turbo charger, the electric auxiliary supercharging system is connected to the power transmission of the turbo charger, wherein, in a first working state of the electric supercharging system, the main body portion drives the turbo charger to operate, and in a second working state of the electric supercharging system, the non-full-time-operation electric auxiliary supercharging system and the main body portion simultaneously drive the turbo charger to operate. The main body part of the turbine pressure increasing system comprises an engine and a pipeline for connecting the turbocharger and the engine; the turbocharger is mounted on an exhaust side of the engine; one end of the turbocharger is connected to an exhaust port of the engine, and the other end of the turbocharger is connected to an air inlet of the engine through the pipeline. The electric auxiliary pressurization system comprises a motor, and an output shaft of the motor is in transmission connection with the power of the turbocharger. The electric auxiliary pressurization system further comprises a speed reducing device, one end of the speed reducing device is connected with the output shaft of the motor, and the other end of the speed reducing device is connected with the turbocharger. The electric auxiliary pressurization system comprises a new energy battery for providing power for the motor and an electric wire for connecting the new energy battery and the motor. And the new energy battery is connected with the engine through a logic circuit. The air inlet of the air filtering device is communicated with the atmosphere, and the air outlet of the air filtering device is communicated with the air inlet of the compressor of the turbocharger. The turbocharger also comprises a cooling device which is connected to a pipeline between the engine and a compressor of the turbocharger. The exhaust device is characterized by further comprising an exhaust device, wherein one end of the exhaust device is connected with an air outlet of a turbine of the turbocharger, and the other end of the exhaust device is connected with the atmosphere. However, in the above-described technical solution, the electric supercharger is disposed upstream or downstream of the conventional turbocharger, coexisting with the turbocharger; the whole system can only carry out supercharging compensation in the engine at low speed and high load, and charging is often carried out, so that additional resources are consumed.
Chinese patent application publication No. CN 109931155A discloses an electrically assisted turbocharger having a cylinder configured to receive a fuel-air mixture for combustion therein and a reciprocating piston disposed inside the cylinder and configured to exhaust gas from the cylinder, the turbocharger system including a turbocharger having: a shaft supported to rotate a turbine wheel about an axis, the turbine wheel mounted on the shaft and configured to rotate a compressor assembly about the axis through the exhaust gas, the compressor assembly mounted on the shaft and configured to pressurize a gas stream received from an environment for delivery to the cylinder motor, the motor configured to generate a motor torque; and a one-way clutch configured to selectively connect the motor to the compressor assembly such that the motor torque assists the turbocharger in generating boost pressure. The shaft is a one-piece shaft element; and the compressor assembly includes a single compressor wheel. The one-way clutch includes a mechanism configured to select a coupling direction of the one-way clutch and a direction of a flywheel such that the turbine wheel rotated by the exhaust gas can rotate the shaft, which in turn rotates the motor to generate electric current. Wherein the mechanism is operated by a pressurized fluid. Also included is a fluid pump configured to supply the pressurized fluid. Wherein the shaft comprises a first shaft element and a second shaft element; and the compressor assembly includes a first compressor wheel mounted on the first shaft member and a second compressor wheel mounted on the first shaft member; the turbocharger system further includes a torque transmitting device disposed between the first shaft element and the second shaft element and configured to selectively connect the first shaft element to the second shaft element. However, in the above-described solution, the electric motor is disposed downstream of the conventional turbocharger, coexisting with the turbocharger; the generated auxiliary torque can only be used for a turbocharger and cannot act on a crankshaft of the diesel engine; the motor needs to consume additional work.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned deficiencies of the prior art and providing a power turbine system and method for utilizing the same that provides both boost compensation and torque assist.
In order to achieve the above object, the present invention provides a power turbine system capable of providing boost compensation and torque assist, which includes an engine, a boost turbine, a power turbine, a compressor and a motor generator set;
the booster turbine is arranged at the downstream of an exhaust gas outlet pipe of the engine and is used for receiving exhaust gas discharged by the engine, and an exhaust gas outlet of the engine is connected with an exhaust gas inlet of the booster turbine;
the power turbine is arranged at the downstream of the booster turbine and used for receiving gas discharged by the booster turbine, a gas outlet of the booster turbine is connected with a gas inlet of the power turbine, and an exhaust outlet is also arranged on the power turbine and used for discharging exhaust gas;
the air compressor is provided with an air inlet for receiving fresh air and pressurizing the fresh air to enter the engine, and an air outlet of the air compressor is connected with an air inlet of the engine;
a first clutch is arranged between an output shaft of the power turbine and the air compressor, and a second clutch is arranged between the output shaft of the power turbine and the motor engine group;
and an output shaft of the power turbine is connected with the first clutch and the second clutch through a planetary gear.
Preferably, the compressor is coaxially connected with the booster turbine, and the compressor is driven by the booster turbine to pressurize the gas entering the compressor.
In a preferred embodiment, the motor generator set is connected to a crankshaft of the engine via a third clutch.
Preferably, the exhaust gas from the engine can flow into the power turbine via the turbo charger to drive the power turbine to rotate, so that the power turbine drives the motor-generator set to generate electricity, and the electricity is stored in the battery pack.
In a preferred embodiment, the electric motor generator set can discharge electricity and transmit the electricity to the compressor through the second clutch and the first clutch, so that the compressor is driven to rotate at an accelerated speed to realize supercharging compensation.
In a preferred embodiment, the power turbine may provide power to the compressor through the first clutch, so as to drive the compressor to rotate at an accelerated speed to realize supercharging compensation.
Preferably, the motor generator set can discharge power supplied to the engine through the third clutch, so that torque assistance is achieved.
The present invention also provides a method of utilizing the power turbine system described above to provide boost compensation and torque assist, comprising a first mode:
when the engine is in a working condition that the torque is less than 1200Nm, the first clutch is disconnected, the second clutch is engaged, and the third clutch is disconnected; the waste gas discharged by the engine flows to the power turbine through the booster turbine to drive the power turbine to rotate, and the power turbine drives the motor engine set to generate electricity through the second clutch connected with the output shaft of the power turbine and stores the electric energy in the battery pack.
As a preferred embodiment, the present invention may provide a method of utilizing a boost compensated and torque assisted power turbine system, further comprising a second mode:
when the engine is in a working condition that the rotating speed is 1100-1500 rpm and the torque is larger than or equal to 1200Nm, the first clutch is engaged, the second clutch is engaged, the third clutch is disconnected, the motor engine set is used as a motor and is transmitted to the gas compressor through the second clutch and the first clutch to drive the gas compressor to rotate in an accelerated manner; meanwhile, the power turbine provides power for the air compressor through the first clutch, and pressurization compensation is achieved.
As a preferred embodiment, the present invention may provide a method of utilizing a boost-compensated and torque-assisted power turbine system, characterized by: a third mode is also included:
when the engine is in the working condition that the rotating speed is less than 1100rpm and the torque is more than or equal to 1200Nm, the first clutch is disconnected, the second clutch is disconnected, the third clutch is engaged, the power is provided for the engine through the discharge of the motor engine unit, and the auxiliary torque is provided for the engine.
Compared with the prior art, the invention has the following advantages:
first, the power turbine system of the present invention, which can provide boost compensation and torque assist, can replace the traditional turbocharger, the traditional engine needs to drive the turbine through exhaust gas to drive the compressor to rotate at high speed to provide compressed air for combustion in the engine cylinder to promote combustion, and the system of the present invention can realize and surpass the function of the traditional turbocharger by integrating the compressor, the power turbine and the motor generator set on a planetary gear set.
Secondly, the invention can provide the waste gas of the booster turbine of the power turbine system with the functions of pressure boost compensation and torque assistance to flow to the power turbine, the power turbine drives the motor engine set to generate electricity through a shaft connected with the power turbine, the electric energy is stored in the motor, the energy obtained from the waste gas by the power turbine is converted into the electric energy through the generator, thereby realizing the power generation of the power turbine, and the structure of the power turbine can recover the waste heat energy.
Thirdly, the invention can provide the motor engine group discharge and the power turbine of the power turbine system with supercharging compensation and torque assistance, and can simultaneously provide power for the compressor, thereby improving the supercharging pressure. And a third clutch at the motor generator set end is disconnected, power is provided through motor discharge and a power turbine, the rotating speed of the air compressor is increased, and supercharging compensation is realized so as to achieve the expected boosting pressure.
Fourthly, the power turbine system capable of providing supercharging compensation and torque assistance can provide power for the engine through discharge of the motor generator set, so that the engine can be provided with the assistance torque.
Fifthly, the invention can provide a motor engine set of the power turbine system with supercharging compensation and torque assistance without consuming the work of the engine. The electric energy of the motor engine set is derived from the power provided by the power turbine at the low load and is generated by the generator, so that the sustainability is strong, and the shaft work is not consumed.
The invention can provide a method for utilizing a power turbine system with supercharging compensation and torque assistance, and can realize power generation and motor driving mode switching by using a clutch according to different working conditions, can perform torque assistance lifting under a high-load working condition, and can realize supercharging compensation by using an electric compressor to lift supercharging pressure and improve air-fuel ratio.
Seventhly, the invention can provide a utilization method of a power turbine system with supercharging compensation and torque assistance, and can realize three operation modes, wherein the first mode can realize power turbine power generation; in the second mode, the rotation speed of the compressor is increased to realize the function of supercharging compensation by providing power through end discharge of the motor generator set and the power turbine; in the third mode, the motor generator set can provide power for the engine to realize torque assistance.
Drawings
FIG. 1 is a schematic illustration of the operation of a power turbine system of the present invention that provides boost compensation and torque assist;
in the figure, 1-engine, 2-booster turbine, 3-power turbine, 4-compressor, 5-motor engine set, 6-first clutch, 7-second clutch, 8-planetary gear and 9-third clutch.
Detailed Description
The present invention will be described in further detail below with reference to specific examples for the purpose of facilitating understanding by those skilled in the art, but those skilled in the art will appreciate that the following examples are a part of the present invention, rather than the whole, and are intended to illustrate the present invention and should not be construed as limiting the scope of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Example 1
A power turbine system capable of providing boost compensation and torque assist according to the present embodiment is shown in fig. 1, and includes an engine 1, a boost turbine 2, a power turbine 3, a compressor 4, and a motor-generator set 5; the booster turbine 2 is arranged at the downstream of an exhaust gas discharge pipe of the engine 1 and used for receiving exhaust gas discharged by the engine 1, and an exhaust gas outlet of the engine 1 is connected with an exhaust gas inlet of the booster turbine 2; the power turbine 3 is arranged at the downstream of the booster turbine 2 and used for receiving gas discharged by the booster turbine 2, a gas outlet of the booster turbine 2 is connected with a gas inlet of the power turbine 3, and an exhaust outlet is also arranged on the power turbine 3 and used for discharging exhaust gas; the air compressor 4 is provided with an air inlet for receiving fresh air and pressurizing the fresh air to enter the engine 1, and an air outlet of the air compressor 4 is connected with an air inlet of the engine 1; a first clutch 6 is arranged between the output shaft of the power turbine 3 and the compressor 4, and a second clutch 7 is arranged between the output shaft of the power turbine 3 and the motor engine unit 5; the output shaft of the power turbine 3 is connected to the first clutch 6 and the second clutch 7 via a planetary gear 8.
In the technical scheme, the air compressor 4 is coaxially connected with the booster turbine 2, and the air compressor 4 is driven by the booster turbine 2 to pressurize the air entering the air compressor. The motor generator set 5 is connected to the crankshaft of the engine 1 via a third clutch 9. The exhaust gas from the engine 1 can flow into the power turbine 3 through the booster turbine 2 to drive the power turbine 3 to rotate, so that the power turbine 3 drives the motor-generator set 5 to generate electricity, and the electricity is stored in the battery pack. The motor generator set 5 can discharge electricity and transmit the electricity to the air compressor 4 through the second clutch 7 and the first clutch 6, so that the air compressor 4 is driven to rotate in an accelerated mode to achieve supercharging compensation. The power turbine 3 can provide power for the compressor 4 through the first clutch 6, so that the compressor 4 is driven to rotate in an accelerating mode to realize supercharging compensation. The motor-generator set 5 can discharge power to the engine 1 through the third clutch 9, thereby achieving torque assist.
The method of utilizing the power turbine system of the present embodiment to provide boost compensation and torque assist includes a first mode: when the engine is in a working condition that the torque is less than 1200Nm (low load), the first clutch 6 is disconnected, the second clutch 7 is engaged, and the third clutch 9 is disconnected; the exhaust gas discharged by the engine flows to the power turbine 3 through the booster turbine 2 to drive the power turbine 3 to rotate, and the power turbine 3 drives the motor generator set 5 to generate electricity through the second clutch 7 connected with the output shaft of the power turbine 3 and stores the electric energy in the battery pack. And converting the energy obtained by the power turbine from the exhaust gas into electric energy through the generator, thereby realizing the power generation of the power turbine. The required clutch engaging/disengaging working condition is calibrated on an engine test bed, namely the rotating speed and the load working condition of the engine are found through calibration, a corresponding mode is selected, generated data map is stored in an ECU, and the ECU controls the clutch through a CAN signal.
Example 2
The power turbine system capable of providing supercharging compensation and torque assistance comprises an engine 1, a supercharging turbine 2, a power turbine 3, a compressor 4 and a motor engine unit 5; the booster turbine 2 is arranged at the downstream of an exhaust gas discharge pipe of the engine 1 and used for receiving exhaust gas discharged by the engine 1, and an exhaust gas outlet of the engine 1 is connected with an exhaust gas inlet of the booster turbine 2; the power turbine 3 is arranged at the downstream of the booster turbine 2 and used for receiving the gas discharged by the booster turbine 2, a gas outlet of the booster turbine 2 is connected with a gas inlet of the power turbine 3, and an exhaust outlet is also arranged on the power turbine 3 and used for discharging exhaust gas; the air compressor 4 is provided with an air inlet for receiving fresh air and pressurizing the fresh air to enter the engine 1, and an air outlet of the air compressor 4 is connected with an air inlet of the engine 1; a first clutch 6 is arranged between the output shaft of the power turbine 3 and the compressor 4, and a second clutch 7 is arranged between the output shaft of the power turbine 3 and the motor engine unit 5; the output shaft of the power turbine 3 is connected to the first clutch 6 and the second clutch 7 via a planetary gear 8.
In the technical scheme, the air compressor 4 is coaxially connected with the booster turbine 2, and the air compressor 4 is driven by the booster turbine 2 to pressurize the air entering the air compressor. The motor generator set 5 is connected to the crankshaft of the engine 1 via a third clutch 9. The exhaust gas from the engine 1 can flow into the power turbine 3 through the booster turbine 2 to drive the power turbine 3 to rotate, so that the power turbine 3 drives the motor-generator set 5 to generate electricity, and the electricity is stored in the battery pack. The motor engine set 5 can discharge electricity and transmit the electricity to the compressor 4 through the second clutch 7 and the first clutch 6, so that the compressor 4 is driven to rotate in an accelerated mode to achieve supercharging compensation. The power turbine 3 can provide power for the compressor 4 through the first clutch 6, so that the compressor 4 is driven to rotate in an accelerated mode to achieve supercharging compensation. The motor-generator set 5 can discharge power to the engine 1 through the third clutch 9, thereby achieving torque assist.
The method for utilizing the power turbine system capable of providing boost compensation and torque assist of the embodiment comprises a second mode: when the engine is in the working condition that the rotating speed is 1100-1500 rpm and the torque is more than or equal to 1200Nm (medium-low rotating speed and high load), the first clutch 6 is engaged, the second clutch 7 is engaged, the third clutch 9 is disconnected, the motor engine set 5 is used as a motor and is transmitted to the gas compressor 4 through the second clutch 7 and the first clutch 6 to drive the gas compressor 4 to rotate in an accelerated manner; meanwhile, the power turbine 3 provides power for the compressor 4 through the first clutch 6, and pressurization compensation is achieved.
The air-fuel ratio is lower and the specific fuel consumption is increased under the working condition, so that the engine supercharging requirement is increased in order to improve the air-fuel ratio and the specific fuel consumption. The motor engine unit 5 is used as a motor and is transmitted to the compressor 4 through the second clutch 7 and the first clutch 6 to drive the compressor 4 to rotate, so that the rotating speed of the compressor 4 is increased, the supercharging pressure is increased, the supercharging compensation is realized, and the air-fuel ratio is improved; meanwhile, the power turbine 3 also provides power for the air compressor 4 through the planetary gear 8 and the first clutch 6, so that the supercharging pressure is increased, and the air-fuel ratio is improved. Therefore, the rotating speed of the air compressor is increased to realize the supercharging compensation function by discharging of the motor engine unit 5 and providing power by the power turbine 3.
Example 3
The power turbine system capable of providing supercharging compensation and torque assistance comprises an engine 1, a supercharging turbine 2, a power turbine 3, a compressor 4 and a motor engine unit 5; the booster turbine 2 is arranged at the downstream of an exhaust gas discharge pipe of the engine 1 and used for receiving exhaust gas discharged by the engine 1, and an exhaust gas outlet of the engine 1 is connected with an exhaust gas inlet of the booster turbine 2; the power turbine 3 is arranged at the downstream of the booster turbine 2 and used for receiving gas discharged by the booster turbine 2, a gas outlet of the booster turbine 2 is connected with a gas inlet of the power turbine 3, and an exhaust outlet is also arranged on the power turbine 3 and used for discharging exhaust gas; the air compressor 4 is provided with an air inlet for receiving fresh air to enable the fresh air to be pressurized and enter the engine 1, and an air outlet of the air compressor 4 is connected with an air inlet of the engine 1; a first clutch 6 is arranged between the output shaft of the power turbine 3 and the compressor 4, and a second clutch 7 is arranged between the output shaft of the power turbine 3 and the motor engine unit 5; the output shaft of the power turbine 3 is connected to the first clutch 6 and the second clutch 7 via a planetary gear 8.
In the technical scheme, the air compressor 4 is coaxially connected with the booster turbine 2, and the air compressor 4 is driven by the booster turbine 2 to pressurize the air entering the air compressor. The motor generator set 5 is connected to the crankshaft of the engine 1 via a third clutch 9. The exhaust gas from the engine 1 can flow into the power turbine 3 through the booster turbine 2 to drive the power turbine 3 to rotate, so that the power turbine 3 drives the motor-generator set 5 to generate electricity, and the electricity is stored in the battery pack. The motor engine set 5 can discharge electricity and transmit the electricity to the compressor 4 through the second clutch 7 and the first clutch 6, so that the compressor 4 is driven to rotate in an accelerated mode to achieve supercharging compensation. The power turbine 3 can provide power for the compressor 4 through the first clutch 6, so that the compressor 4 is driven to rotate in an accelerated mode to achieve supercharging compensation. The motor-generator set 5 can discharge power to the engine 1 through the third clutch 9, thereby achieving torque assist.
The method of utilizing the power turbine system of the present embodiment, which provides boost compensation and torque assist, includes a third mode: when the engine is in the working condition that the rotating speed is less than 1100rpm and the torque is more than or equal to 1200Nm (low rotating speed and high load), the first clutch 6 is disconnected, the second clutch 7 is disconnected, the third clutch 9 is engaged, the motor engine unit 5 discharges electricity to provide power for the engine 1, and auxiliary torque is provided for the engine. The third clutch 9 between the motor engine unit 5 and the engine 1 is engaged, the motor engine unit 5 discharges to provide power and is connected to the crankshaft of the engine through the third clutch 9, and the torque assistance function is realized.
The above embodiments are only preferred embodiments of the present invention, and other implementations of the present invention are possible, and it should be noted that any obvious substitutions or modifications can be made without departing from the scope of the present invention.
Finally, it should be noted that the above embodiments are merely representative examples of the present invention. It is obvious that the invention is not limited to the embodiments described above, but that many variations are possible. Any simple modification, equivalent change and modification made to the above embodiments in accordance with the technical spirit of the present invention should be considered to be within the scope of the present invention.
Here, it should be noted that the description of the above technical solutions is exemplary, the present specification may be embodied in different forms, and should not be construed as being limited to the technical solutions set forth herein. Rather, these descriptions are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Furthermore, the technical solution of the present invention is limited only by the scope of the claims.
The shapes, sizes, ratios, angles, and numbers disclosed to describe aspects of the specification and claims are examples only, and thus, the specification and claims are not limited to the details shown. In the following description, when a detailed description of related known functions or configurations is determined to unnecessarily obscure the focus of the present specification and claims, the detailed description will be omitted.
Where the terms "comprising", "having" and "including" are used in this specification, there may be another part or parts unless otherwise stated, and the terms used may generally be in the singular but may also be in the plural.
It should be noted that although the terms "first," "second," "top," "bottom," "side," "other," "end," "other end," and the like may be used and used in this specification to describe various components, these components and parts should not be limited by these terms. These terms are only used to distinguish one element or section from another element or section. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, with the top and bottom elements being interchangeable or switchable with one another under certain circumstances, without departing from the scope of this specification; the components at one end and the other end may be the same or different in performance from one another.
Further, in constituting the component, although it is not explicitly described, it is understood that a certain error region is necessarily included. In describing positional relationships, for example, when positional sequences are described as being "on.. Above", "over.. Below", "below", and "next", unless such words or terms are used as "exactly" or "directly", they may include cases where there is no contact or contact therebetween. If a first element is referred to as being "on" a second element, that does not mean that the first element must be above the second element in the figures. The upper and lower portions of the member will change depending on the angle of view and the change in orientation. Thus, in the drawings or in actual construction, if a first element is referred to as being "on" a second element, it can be said that the first element is "under" the second element and the first element is "over" the second element. In describing temporal relationships, unless "exactly" or "directly" is used, the descriptions of "after", "subsequently", and "before" may include instances where there is no discontinuity between steps.
The features of the various embodiments of the present invention may be partially or fully combined or spliced with each other and performed in a variety of different configurations as would be well understood by those skilled in the art. Embodiments of the present invention may be performed independently of each other, or may be performed together in an interdependent relationship.
The above description is only an embodiment of the present invention, and it should be noted that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention, and the rest that is not described in detail is the prior art.
Claims (3)
1. A method of utilizing a power turbine system that provides boost compensation and torque assist, comprising: includes a first mode:
when the engine is in a working condition that the torque is less than 1200Nm, the first clutch (6) is disconnected, the second clutch (7) is engaged, and the third clutch (9) is disconnected; waste gas discharged by the engine flows to the power turbine (3) through the booster turbine (2) to drive the power turbine (3) to rotate, and the power turbine (3) drives the motor-generator set (5) to generate electricity through the second clutch (7) connected with the output shaft of the power turbine and stores the electricity in the battery pack;
the power turbine system capable of providing supercharging compensation and torque assistance comprises an engine (1), a supercharging turbine (2), a power turbine (3), a compressor (4) and a motor engine unit (5);
the booster turbine (2) is arranged at the downstream of an exhaust gas discharge pipe of the engine (1) and is used for receiving exhaust gas discharged by the engine (1), and an exhaust gas outlet of the engine (1) is connected with an exhaust gas inlet of the booster turbine (2);
the power turbine (3) is arranged at the downstream of the booster turbine (2) and used for receiving gas discharged by the booster turbine (2), a gas outlet of the booster turbine (2) is connected with a gas inlet of the power turbine (3), and an exhaust outlet is also arranged on the power turbine (3) and used for discharging exhaust gas;
the air compressor (4) is provided with an air inlet for receiving fresh air and pressurizing the fresh air to enter the engine (1), and an air outlet of the air compressor (4) is connected with an air inlet of the engine (1);
a first clutch (6) is arranged between the output shaft of the power turbine (3) and the air compressor (4), and a second clutch (7) is arranged between the output shaft of the power turbine (3) and the motor generator set (5);
the output shaft of the power turbine (3) is connected with the first clutch (6) and the second clutch (7) through a planetary gear (8);
the compressor (4) is coaxially connected with the booster turbine (2), and the compressor (4) is driven by the booster turbine (2) to pressurize gas entering the compressor;
the motor engine unit (5) is connected with a crankshaft of the engine (1) through a third clutch (9);
the exhaust gas discharged by the engine (1) can flow into the power turbine (3) through the booster turbine (2) to drive the power turbine to rotate, so that the power turbine (3) drives the motor-generator set (5) to generate electricity, and the electricity is stored in the battery pack;
the motor engine unit (5) can discharge electricity and transmit the electricity to the compressor (4) through the second clutch (7) and the first clutch (6), so that the compressor (4) is driven to rotate in an accelerated mode to realize supercharging compensation;
the power turbine (3) can provide power for the compressor (4) through the first clutch (6), so that the compressor (4) is driven to rotate in an accelerating mode to realize supercharging compensation;
the motor engine set (5) can discharge electricity to provide power for the engine (1) through the third clutch (9), and therefore torque assistance is achieved.
2. The method of utilizing a power turbine system providing boost compensation and torque assist as claimed in claim 1, wherein: further comprising a second mode:
when the engine is in a working condition that the rotating speed is 1100-1500 rpm and the torque is larger than or equal to 1200Nm, the first clutch (6) is engaged, the second clutch (7) is engaged, the third clutch (9) is disconnected, the motor engine set (5) is used as a motor and is transmitted to the air compressor (4) through the second clutch (7) and the first clutch (6) to drive the air compressor (4) to rotate in an accelerated manner; meanwhile, the power turbine (3) provides power for the air compressor (4) through the first clutch (6) to realize supercharging compensation.
3. The method of utilizing a power turbine system providing boost compensation and torque assist as claimed in claim 2, wherein: a third mode is also included:
when the engine is in a working condition that the rotating speed is less than 1100rpm and the torque is more than or equal to 1200Nm, the first clutch (6) is disconnected, the second clutch (7) is disconnected, the third clutch (9) is engaged, and the motor engine unit (5) discharges electricity to provide power for the engine (1) and provide auxiliary torque for the engine.
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| JP2910610B2 (en) * | 1995-03-27 | 1999-06-23 | 三菱自動車工業株式会社 | Turbo compound engine |
| CN204163812U (en) * | 2014-09-30 | 2015-02-18 | 东风商用车有限公司 | Waste gas bypass power turbine system |
| CN205225401U (en) * | 2015-12-30 | 2016-05-11 | 东风商用车有限公司 | Double-flow-passage power turbine system |
| CN108087103A (en) * | 2017-12-06 | 2018-05-29 | 清华大学 | A kind of internal-combustion engine system |
| CN107939513B (en) * | 2018-01-05 | 2023-12-22 | 太原科技大学 | Electric auxiliary clutch type power turbine composite supercharger |
| CN109944683B (en) * | 2019-03-08 | 2021-04-20 | 哈尔滨工程大学 | Flexible electric composite turbocharging system |
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