JPH04124428A - Turbo compound engine - Google Patents

Abstract

PURPOSE:To double driving force of a vehicle by supplying outputs from a combustor for taking in pressurized air from a turbocharger for combustion of fuel and from a generator, which is driven by combustion gas from the combustor and exhaust gas from the turbocharger, to a wheel driving electric motor. CONSTITUTION:A generator 41 is disposed in a gas turbine 4 which is rotatably driven by exhaust gas from a turbocharger 2 provided with a rotary electric machine 3 and combustion gas from a combustor 5 for converting pressurized air from the turbocharger 2 into combustion air. An electric motor 81 for driving a wheel 8 is energized by a generating output of the rotary electric machine 3 and a generating output of the generator 41, for driving. Therefore, it is possible to increase traveling force of the wheel 8 by an engine 1.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a turbo compound engine that attempts to efficiently obtain large output by combining an insulated reciprocating engine, a turbocharger with a rotating electrical machine, and a gas turbine. .

(Prior Art) A turbo compound engine is a turbo compound engine in which a generator is attached to a turbocharger that is driven by the exhaust energy of the engine, and the output of the generator drives an electric motor placed in the engine's drive system to power the vehicle. Various proposals have been made.

If the reciprocating engine section of this type of turbo compound engine is made to have an adiabatic structure, the exhaust energy will increase, and the recovered electrical energy and the amount of air delivered by the compressor will increase.

On the other hand, engines using a gas turbine as the prime mover have different output characteristics than reciprocating engines, and the amount of work of the gas turbine increases significantly at high output.

(Problems to be Solved by the Invention) As mentioned above, in an engine with an adiabatic structure, the work of the turbocharger increases at high output, resulting in a surplus of air delivery. Sometimes, there is a problem that efficiency is lower than that of reciprocating engines.

The present invention was made in view of such conventional problems, and its purpose is to create a turbo compound engine that is efficient over a wide range of engine operating conditions by combining a reciprocating engine, a turbocharger with a rotating electric machine, a gas turbine, etc. This is what we are trying to provide.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an electric motor in which a rotating electric machine is attached to a turbocharger connected to an engine, and the generated output of the rotating electric machine is connected to a wheel drive system. A turbo compound engine that supplies power to the engine and is powered by a combustor that takes in pressurized air from the turbocharger to combust fuel, and a generator that is driven by combustion gas from the combustor and exhaust gas from the turbocharger. A turbo compound engine is provided that includes a turbine and energizing means for supplying the generated output of the generator-equipped turbine to the electric motor.

(Function) A generator is attached to a gas turbine that is rotationally driven by the exhaust gas of a turbocharger with a rotating electrical machine and the combustion gas of a combustor that uses pressure air from the turbocharger as combustion air, and the power generation output of the rotating electrical machine is and the generator output of the gas turbine are applied to the wheel drive electric motor to power the wheel, thereby increasing the driving force of the wheel by the engine.

(Example) Next, an example of the present invention will be described in detail using the drawings.

The drawing is a configuration block diagram showing an embodiment of a turbo compound engine according to the present invention.

In the figure, 1 is an engine, which is a reciprocating engine equipped with a piston that makes reciprocating motion according to engine operation.The engine 1 does not use a cooling mechanism, and has insulation material in the combustion chamber and exhaust flow path. The engine is designed as a so-called adiabatic engine so that exhaust gas containing a large amount of energy is emitted.

A turbocharger 2 including a turbine 21 and a compressor 22 is connected to the exhaust pipe 11 and intake pipe 12 of the engine 1, and the compressor 2 is driven by the torque of the turbine 21 driven by the exhaust energy of the engine 1.
2 to force-feed supercharging air to the engine 1 through the intake pipe 12.

Reference numeral 3 denotes a rotating electric machine which is disposed on the rotating shaft of the turbine 21 and is driven by the turbine torque to generate electricity, and the output from the stator winding 31 is transmitted to a high-power circuit of a controller to be described later.

Reference numeral 4 denotes a gas turbine, which is equipped with a generator 41 and turbine blades 42 and 43 on both sides of its rotating shaft, and one turbine blade 42 is driven by the exhaust gas from the exhaust pipe 23 of the turbocharger 2. The other turbine blade 43 is driven by the combustion gas from the combustor 5, and the output from the generator 41 is sent to the high-power circuit of the controller 6.

The combustor 5 includes a vaporizer 51 that vaporizes fuel and a combustion chamber 52 that mixes and burns the vaporized fuel and air, efficiently burns the fuel from the fuel pump 53, and transfers the combustion gas to the gas turbine. The air intake port 54 of the combustor 5 is connected to an air supply pipe 25 branched from the compressor 22 of the turbocharger 2.
is connected to.

A control valve 7 for adjusting the air flow rate is arranged in the middle of the air supply pipe 25, and the air flow rate to the combustor 5 is controlled by the operation of a valve actuator 71 operated by a command from the controller 6. has been done.

Reference numeral 8 denotes wheels for driving the vehicle, which are rotationally driven by torque from the output shaft 13 of the engine 1 via a transmission mechanism or a transmission mechanism (not shown), and an electric motor 81 is attached to the rotation shaft. Electric power from the rotating electric machine 3 and the generator 41 is transmitted from the high-power circuit of the controller 6 to the electric motor 81, and the engine torque is used to urge the vehicle to travel.

The controller 6 is composed of a microcomputer, and is equipped with a central control unit that performs arithmetic processing, various memories that store arithmetic processing procedures and control procedures, input/output boards, etc. When the signal is input, a predetermined command is issued to the fuel pump 53 and the valve actuator 71 of the control valve 7 for combustion control of the combustor 5.

The high-power circuit connected to the output boat transfers the generated power from the supplied rotating electric machine 3 and generator 41 to the electric motor 81.
is converted into electric power for power running, and the converted electric power is supplied to the electric motor 81 to energize the rotational force of the wheel 8.

Next, the operation of this embodiment will be explained.

When the illustrated engine system is required to have a large output, the generated output from the rotating electrical machine 3 of the turbocharger 2 driven by the heat-insulated exhaust gas of the engine 1 is transmitted to the high-power circuit of the controller 6.

On the other hand, the pressurized air generated by the operation of the compressor 22 of the turbocharger 2 is sent to the engine 1 through the intake pipe 12 of the engine 1 to increase the supercharging pressure, and the control valve 7 provided in the branched air supply pipe 25 is fully opened. The air is sent to the combustor 5 as combustion air from the air intake port 54, mixed with vaporized fuel supplied from the fuel pump 53 and vaporized by the vaporizer 51, and ignited to produce combustion gas.

Therefore, the combustion gas rotates the turbine blades 43 of the gas turbine 4, and the exhaust gas from the turbocharger 2 is fed under pressure to the other turbine blade 42, and the torque of both turbine blades is added to drive the generator 41. The power generation output increases and the power is transmitted to the high-power circuit of the controller 6.

Next, the controller 6 checks the connection between the wheel 8 and the electric motor 81, and determines the electric motor 8 based on the frequency of the winding of the electric motor 81.
1 and converts the voltage and frequency of the power from the generator 41 and the rotating electric machine 3 that are transmitted to the high-power circuit to energize the electric motor 81 so that the rotation speed exceeds the detected rotation speed. .

Therefore, this energization causes the electric motor 81 to perform power running, and the rotational force of the wheels 8 increases, resulting in a propulsive force that is, for example, twice or more, compared to the case where the vehicle is driven by the torque of the engine 1.

Although the present invention has been described above with reference to the above embodiments, various modifications can be made within the scope of the spirit of the present invention, and these modifications are not excluded from the scope of the present invention.

(Effects of the Invention) As described above, according to the present invention, a gas turbine is driven by exhaust gas from a turbocharger with a rotary electric machine and combustion gas from a combustor that uses pressurized air from the compression operation of the turbocharger as combustion air. The electric motor installed in the wheel is powered by the power output from the generator of the gas turbine and the power generated by the rotating electric machine, and the running force of the wheel is energized.
When the engine requires high output, the gas turbine efficiently operates at high output due to the exhaust gas from the turbocharger and the combustion gas from the combustor that uses the compressor's pressure, and therefore the generator output of the gas turbine. The effect of doubling the propulsion force of the vehicle is achieved by the power generated by the rotary electric machine.

[Brief explanation of drawings]

The drawing is a configuration block diagram showing an embodiment of a turbo compound engine according to the present invention. 1...Engine, 2...Turbocharger, 3...
・Rotating electric machine, 4... gas turbine, 5... combustor,
6... Controller, 7... Control valve, 8... Wheel, 41... Generator, 53... Fuel pump, 81...
·Electric motor.

Claims (2)

[Claims] (1) In a turbo compound engine in which a rotating electric machine is attached to a turbocharger connected to the engine, and the generated output of the rotating electric machine is supplied to the electric motor connected to the wheel drive system for power running, pressure air from the turbocharger is taken in. A combustor that burns fuel, a turbine with a generator driven by combustion gas of the combustor and exhaust gas from the turbocharger, and energizing means for supplying the generated output of the turbine with the generator to the electric motor. A turbo compound engine characterized by: (2) The generator-equipped turbine includes a first turbine blade driven by combustion gas from the combustor, and a second turbine blade driven by exhaust gas from the turbocharger.
The turbo compound engine according to claim 1, characterized in that it has a turbine blade of.