JP2896545B2 - Energy recovery system using supercharger with rotating electric machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary electric machine mounted on a turbine shaft of a turbocharger and an electric / generator mechanism connected to a crankshaft to recover energy efficiently by a supercharger with a rotary electric machine which efficiently collects exhaust energy. Related to the device.

[0002]

2. Description of the Related Art In recent years, turbochargers for increasing the boost pressure of an engine by utilizing the exhaust energy of the engine have been widely used. A rotating electric machine is mounted on a turbine shaft of this type of turbocharger, and the operating state of the engine is controlled. depending attempts to recover turbocharger supercharging operation or urging the or exhaust energy drives the electric motor coupled to the output by the power generation operation of this result to the crankshaft, has made various by the electric drive of the rotary electric machine .

When it is desired to increase the supercharging pressure when the engine is under a high load, the power output of the electric / generator mechanism connected to the crankshaft is supplied to the rotating electric machine of the turbocharger to perform the supercharging operation. To increase the supercharging pressure to the engine, and when the engine load is small and the engine rotates at a high speed, the output of the rotating electric machine for power generation is supplied to the motor / generator mechanism of the crankshaft, and the exhaust energy is supplied to the engine. Torque recovery is being done.

[0004]

In the exhaust energy recovery system as described above, the operation of the electric / generator mechanism connected to the crankshaft is controlled by switching to electric power generation or electric power. but when the power generation operation has good power generation efficiency towards the high-speed rotation, during electric operation, since the <br/> low speed from the relation of the transmission of torque good efficiency, coupled with a constant ratio to the crankshaft
Well enough recovery efficiency of to have been of the exhaust energy
There is an inconvenience that it cannot be performed . Also energy times
The configuration of the collecting device itself is also complicated.

The present invention has been made in view of such a problem, and an object thereof is to provide an electric motor connected to a crankshaft.
The power generation mechanism is shifted, and the configuration of the energy recovery device
The present invention is to provide an energy recovery device using a supercharger with a rotating electric machine that attempts to always efficiently recover exhaust energy by simplifying the above.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a power generation system provided on a turbine shaft of a turbocharger attached to an exhaust pipe of an engine, wherein a rotor is constituted by permanent magnets. A rotating electric machine composed of an AC machine capable of electric reversible operation; and a motor / generator mechanism in which a rotor is constituted by a permanent magnet and configured of an AC machine capable of electric motor reversible operation and exchanges power with an engine crankshaft. It is interposed between the rotating electric machine and the motor / generator mechanism, controls the frequency, supplies the generated power of the rotating electric machine to the motor / generator mechanism, drives the motor, and converts the generated power of the motor / generator mechanism into the rotating electric machine. Including an inverter that supplies the power to the
Power converters, transformers respectively provided between the rotating electric machine and the power converter and between the electric / generator mechanism and the power converter, and in an operating state where it is desired to increase the supercharging pressure of the engine. The power converter is controlled to supply the generated electric power of the electric / generator mechanism to the rotating electric machine to drive the electric motor, and the rotation of the rotating shaft provided on the turbine shaft of the turbocharger by the energy of the exhaust gas discharged from the exhaust pipe. A power converter commanding means for controlling the power converter to supply the generated electric power of the rotating electric machine to the electric / generator mechanism and driving the electric motor when the electric machine performs the power generation function; And a power transmission device comprising a planetary gear mechanism which is provided between the shafts and can be changed in speed by operating a clutch device according to the load of the engine. Providing an energy recovery device according to electric supercharger-equipped.

[0007]

The speed ratio of the planetary gear mechanism serving as the speed change means is selected by the clutch so that the rotation speed of the electric / generator mechanism that generates / electrically operates becomes appropriate according to the operation . Also,
The power output of a rotating electrical machine with a permanent magnet as the rotor is also
The trochanter supplies power to the motor / generator mechanism composed of permanent magnets.
The rotating electric machine for energizing the engine torque and the electric motor
Drive each other and control the frequency
Providing one inverter, the rotating electric machine and the invar
Between the motor and the motor / generator and the inverter.
Since each of the transformers is provided, it is possible to efficiently recover the exhaust energy by transferring power to and from the rotating electric machine with a simple structure .

[0008]

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of an energy recovery apparatus using a supercharger with a rotating electric machine according to the present invention , and FIG. 2 is an electric / generator mechanism connected to a crankshaft according to an embodiment of the present invention . FIG.

In these drawings, reference numeral 1 denotes an engine, 2
Is a turbocharger, a turbine 21 of a turbocharger 2 is engaged with an exhaust pipe 11 of the engine 1, and a torque of the turbine 21 driven by exhaust energy is
The compressor 22 and the rotary electric machine 3 are driven to rotate, and the supercharged air is pressure-fed to the engine 1 through the intake pipe 12 by the pneumatic operation of the compressor 22.

The rotating electric machine 3 has a permanent magnet in the rotor, generates AC power to the stator when driven by turbine torque, and drives the rotor when predetermined AC power is supplied to the stator. The torque is used to assist the pneumatic operation of the compressor 22, and the terminal of the stator is connected to the power converter 4 via the transformer 41. The transformer 41 is interposed between the rotating electric machine 3 and the power converter 4, and performs an AC-like transforming action.

Reference numeral 5 denotes a motor / generator mechanism serving as a motor / generator. The rotary shaft 51 is provided with a rotor 52 made of a permanent magnet, and the corresponding stator 53 is wound with a winding to form a transformer 42. Is connected to The transformer 42 is interposed between the power converter 4 and the electric / power generation mechanism 5 and performs an AC-like transforming action. A clutch 54, a pulley 55, and a planetary gear mechanism 56 serving as a speed change means are disposed at the other end of the rotating shaft 51, and the torque from the pulley 55, which is engaged between the pulley 13 of the crankshaft and the V-belt 14, is transmitted by a planetary gear. The power is transmitted to the rotor 52 via the mechanism 56.

The clutch 54 is operated by an electromagnetic force. When the clutch 54 is energized and the clutch 54 is turned on, the planetary gear mechanism 56 is locked, and the rotation of the rotating shaft 51, that is, the rotation of the rotor 52 is controlled by a large pulley. 13 and a small pulley 55, and when the clutch 54 is off, the ratio is, for example, 2. when the clutch 54 is on, due to the gear ratio of the planetary gear mechanism 56.
It is configured to increase the speed five times.

Reference numeral 6 denotes an electronic control unit, which receives signals from a rotation sensor 31 for detecting the rotation speed of the turbocharger 2 and a rotation sensor 57 for detecting the rotation speed of the electric / generator mechanism 5. To the power converter 4 having a rectifier or an inverter so as to issue a control command for transmission and reception of power between the transformer 41 and the transformer 42 and a command for driving the rotating electric machine 3 using the battery 7 as a power supply. In the end, in an operating state in which an increase in the supercharging pressure of the engine is desired, the power converter is controlled to supply the electric power generated by the electric / generator mechanism to the rotating electric machine, thereby driving the electric motor, and the exhaust pipe When the rotating electric machine provided on the turbine shaft of the turbocharger functions to generate electricity by the energy of the exhaust gas discharged from the turbine, the electric power converter is controlled to generate electric power. The role of the power converter command means for this by supplying a force to electric generating mechanism drives the motor Nikki at Tsukasa.

Next, the operation of the embodiment of the present invention constructed as described above will be described. When the boosting of the supercharged air is desired due to the high load of the engine 1, the electric / power generation driven by the engine torque is performed. The power output of the mechanism 5 is
2, rotating electric machine 3 via power converter 4 and transformer 41
The electric power is supplied to the engine 1 and the torque is used to assist the pneumatic operation of the compressor 22 to increase the supercharging pressure and to feed the engine 1 by pressure. In this case, the clutch 54 of the electric / generator mechanism 5 is turned off. The rotating electric machine 3 is electrically driven by an output in which the speed is increased by the gear ratio of the planetary gear mechanism 56 to increase the power generation efficiency of the electric / power generation mechanism 5. Then, when the rotation signal from the rotation sensor 31 of the turbocharger 2 has reached a predetermined value, the clutch 54 is turned on and the electric
The rotation of the power generation mechanism 5 is reduced to control the power generation output. The rotation sensor 31 senses the rotation speed of the rotating electric machine, sends a signal to the controller 6, and generates a three-phase current having a synchronous frequency in the power converter 4 including the inverter.

When the engine 1 has a low load and a high speed, the rotating electric machine 3 of the turbocharger 2 is operated to generate electric power.
The output is connected to a transformer 41, a power converter 4, and a transformer 42.
To the motor / generator mechanism 5 through the
Energize the belt-coupled engine 1. In this case, the on / off of the clutch 54 is controlled in accordance with the rotation signal of the rotation sensor 57 of the electric / power generation mechanism 5, and the exhaust energy is efficiently regenerated as the engine torque.
The signal from the rotation sensor 57 senses the speed of the motor / generator mechanism 5 and sends the signal to a controller. The power converter 4 including an inverter generates a synchronous frequency to drive the motor / generator mechanism 5.

Although the present invention has been described with reference to the above-described embodiment, various modifications and applications are possible within the scope of the present invention, and these modifications and applications are not excluded from the scope of the present invention. Absent.

[0018]

As described above in detail, the present invention arranges a rotating electric machine having a rotor composed of a permanent magnet on a turbine shaft of a turbocharger attached to an exhaust pipe of an engine, and interlocks with a crankshaft. And the rotor is coupled with an electric / generator mechanism composed of a permanent magnet, and the supercharging pressure is increased by supplying the power output of the electric / generator mechanism to the rotating electric machine in accordance with the operating state of the engine, A power converter including an inverter between the rotating electric machine and the electric / generator mechanism, which supplies power to the motor / generator mechanism and supplies engine power to the motor / generator mechanism, and drives the motor and the motor / generator mechanism to mutually control the frequency. , And a transformer is provided between the rotating electric machine and the power converter and between the electric / generator mechanism and the power converter. Recovery of exhaust energy due to the power transfer between the rotary electric machine is implemented efficiently as compared with the prior art. In addition, the rotation of the engine and the electric / power generation mechanism can be changed, so that the electric / power generation mechanism can be controlled to an efficient rotation speed during power generation or electric operation.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram showing an embodiment of an energy recovery device using a supercharger with a rotating electric machine according to the present invention.

Electric linked to the crankshaft in FIG. 2 embodiment,
It is sectional drawing of a power generation mechanism.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Engine 2 ... Turbocharger 3 ... Rotating electric machine 5 ... Electric / power generation mechanism 6 ... Controller 54 ... Clutch 56 ... Planetary gear mechanism

Claims (1)

(57) [Claims] 1. A rotating electric machine comprising an alternator which is provided on a turbine shaft of a turbocharger attached to an exhaust pipe of an engine and whose rotor is constituted by a permanent magnet and which is reversibly operable by a generator motor, and wherein the rotor is constituted by a permanent magnet. An electric / generator mechanism configured and configured by a generator / motor reversible operable AC machine, which exchanges power with a crankshaft of an engine, and intervenes between the rotating electric machine and the electric / generator mechanism to control a frequency. A power converter including an inverter that supplies the generated electric power of the rotating electric machine to the motor / generator and drives the motor, and supplies the generated electric power of the motor / generator to the rotating electric machine and drives the motor. A transformer provided between the rotating electric machine and the power converter and between the electric / generator mechanism and the power converter, and the power conversion during an operating state in which an increase in supercharging pressure of the engine is desired. The electric power generated by the motor / generator mechanism is supplied to the rotating electric machine to drive the electric motor, and the rotating electric machine provided on the turbine shaft of the turbocharger generates electricity by the energy of the exhaust gas discharged from the exhaust pipe. When functioning, a power converter commanding means for controlling the power converter to supply the generated electric power of the rotating electric machine to the motor / generator mechanism and driving the electric motor to drive the motor, and between the motor / generator mechanism and the crankshaft of the engine. And a power transmission device comprising a planetary gear mechanism that can be shifted by operating a clutch device in accordance with the load of the engine.