JPH06229251A - Generator for vehicle - Google Patents

Abstract

PURPOSE:To feed combustion gas from a combustor of small capacity for power generation at the time of stopping the engine by mounting throttle rings on a gas flow passage of a turbo-charger provided with a dynamo-electric machine to a turbine, and on a pressurized air passage from a compressor respectively. CONSTITUTION:A throttle ring 3 is mounted on the gas flow passage of a turbine 11 in a turbo-charger provided with a dynamo-electric machine 2, and a throttle ring 4 is mounted on a pressurized air flow passage from a compressor 13. At the time of stopping an engine, the respective throttle rings 3, 4 are moved by action of an air cylinder 5 to throttle respective flow passages 6 to feed combustion gas from a combustor 7 of small capacity to the throttled turbine 11, thus providing corresponding power output generated by the dynamo- electric machine 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power generator for a vehicle that drives a turbocharger with a rotating electric machine by a separate combustor to generate electric power while the engine is stopped.

[0002]

2. Description of the Related Art In recent years, a rotary electric machine has been incorporated into a turbocharger attached to an engine of a vehicle, and the rotary electric machine is electrically driven according to the operating state of the engine to increase boost pressure to increase engine torque at low speeds and exhaust gas. When there is enough energy, the rotating electric machine is operated to generate electric power to recover exhaust energy as electric power.

A turbocharger with a rotating electric machine is provided which is equipped with a combustor for fuel separately from the engine and supplies the combustion gas to the turbocharger to improve power generation and to supply power while the engine is stopped. It is disclosed in Japanese Unexamined Patent Publication No. 64-12026.

[0004]

Generally, although the turbocharger is small, it is constructed so that the total amount of air required by the engine can be obtained by the output of the compressor, and as shown in the above-mentioned publication. In order to operate the turbocharger with a rotating electric machine while the engine is stopped, the output of the combustor requires a heat generation amount close to the full load of the engine.

On the other hand, the energy required to cool and heat the passenger compartment is usually 1/10 or less of the engine output. For example, even if fuel equivalent to this energy is burned and input to the turbine of the turbocharger, the gas temperature Is low, it is difficult to operate the turbocharger by itself, and there is a problem that a large-capacity combustor and appropriate fuel are required to drive the turbocharger when the engine is stopped.

The present invention has been made in view of the above problems, and an object thereof is to change the exhaust gas passage and the supercharging air passage of a turbocharger having a rotating electric machine from a small-capacity combustor. An object of the present invention is to provide a vehicular power generation device that attempts to obtain a desired power generation output with a small amount of heat energy.

[0007]

To achieve the above object, according to the present invention, a rotary electric machine mounted on a turbine shaft of a turbocharger that is driven by exhaust energy of an engine to compress intake air, and a turbine of the turbocharger Throttle means for narrowing the gas flow path to the compressor and the compressed air flow path from the compressor, the combustor of the fuel arranged in the bypass flow path installed between the gas flow path and the compressed air flow path, and each of the above There is provided a vehicular power generation device having power generation control means for operating the throttle means and causing the rotating electric machine to output electric power by the turbine torque generated by the operation of the combustor.

[0008]

[Operation] Gas flow path to turbine of turbocharger,
Since the compressed air flow path from the compressor is throttled together, the turbocharger can be sufficiently driven only by the thermal energy from the small-capacity combustor, so that the output of the electric power for cooling and heating from the rotating electric machine can be freely obtained.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a sectional view showing a main part of an embodiment of a vehicular power generator according to the present invention, and FIG. 2 is a perspective view of a diaphragm ring thereof. In these drawings, reference numeral 1 denotes a turbocharger, which increases the intake pressure of the engine by recovering the exhaust gas energy of the engine as is well known.
A turbine 11 driven by exhaust energy and a compressor 13 mounted on a turbine shaft 12 are provided, and the air from the intake port 14 is compressed by the compressed air operation of the compressor 13 driven by turbine torque, and the intake pipe 1
It is pressure-fed as supercharged air to the engine via 7.

Reference numeral 2 is a rotary electric machine that operates to generate electricity / power,
A rotor 21 made of a permanent magnet is arranged on the turbine shaft 12, and a stator 22 corresponding to the rotor 21 is attached to the central housing 15. The lead wire 23 from the stator 22 is connected to, for example, a control device for a battery mounted on a vehicle, a control device for cooling / heating the vehicle, or the like.

Reference numeral 3 denotes a throttle ring for a turbine, which is arranged in a flow path of exhaust gas pressure-fed from the turbine casing 16 to the turbine 11 and throttles and controls the gas flow rate to the turbine 11. An air cylinder serving as an actuator. 5, the mechanism of the link 51 and the link 52 works to move the throttle ring 3 having the notch 31 shown in FIG. 2 in the horizontal direction to throttle the flow path, so that the turbine 11 can be sufficiently driven even at a small flow rate. Is configured.

Further, 4 is a throttle ring for the compressor,
A notch 41 similar to the throttle ring 3 is provided, and the throttle ring 4 moves in the horizontal direction by the mechanism of the link 51 and the link 53 operated by the air cylinder 5 to control the compressed air flow path from the compressor 13 to reduce the load. It is variable.

Reference numeral 6 denotes a bypass flow passage, which is provided between the outlet of the compressor 13 and the inlet of the turbine 11, and the flow passage is provided with a pressure air switching valve 61, a combustor 7, and an exhaust gas switching valve 62. There is. The compressed air switching valve 61 switches the compressed air generated by the operation of the compressor 13 to the intake pipe 17 or the combustor 7 side of the engine. The exhaust gas switching valve 62 guides the exhaust gas from the exhaust pipe 18 to the turbine 11, or Alternatively, it is switched whether to guide the combustion gas of the combustor 7, and the switching control is performed by the valve actuator 63 and the valve actuator 64, respectively.

The combustor 7 includes a vaporizer 71 and a combustion frame 72.
And the like, the supplied fuel is efficiently burned by the air sent through the pressure air switching valve 61, and is pressure-fed to the turbine 11 through the exhaust gas switching valve 62. At the time of this pressure feeding, the throttle ring 3 causes a flow path. Is narrowed down,
The turbine 11 is configured to be sufficiently driven by the combustion gas from the combustor 7.

Next, the operation of this embodiment having the above-mentioned structure will be described. To drive the turbocharger only with the combustion gas of the combustor 7, the solenoid valve 54 is operated to operate the air cylinder 5. , The link 51 and the link 52 move the throttle ring 3 to the left in the drawing to narrow the gas flow path to the turbine 11 by the notch 31. At the same time, the throttle ring 4 on the compressor 13 side is also moved to the left by the link 51 and the link 53 to narrow the flow path.

Further, in the bypass flow path 6, the pressure air switching valve 61 and the exhaust gas switching valve 6 are always shown in the solid line direction.
2 is switched in the dotted line direction by the valve actuators 63 and 64.

Therefore, the gas combusted by the combustor 7 passes through the open exhaust gas switching valve 62, is sent to the turbine 11 having a narrowed flow passage, and drives the rotor 21 arranged on the turbine shaft 12. Therefore, electromotive force is generated by electromagnetic induction to the stator 22 due to the rotation of the permanent magnet, and the electric power generated via the lead wire 23 is transmitted to, for example, the cooling / heating device.

The present invention has been described above with reference to the above-described embodiments. However, within the scope of the gist of the present invention, various movements such as changing the moving direction of the throttle ring for narrowing the flow passage to change the operating direction of the actuator are possible. Can be modified and applied, and these modifications and applications are not excluded from the scope of the present invention.

[0020]

According to the present invention as in the above embodiments,
A throttle ring is attached to each of the gas flow path to the turbine of the turbocharger and the compressed air flow path from the compressor.When power is generated when the engine is stopped, both flow paths are narrowed by the throttle ring, so a small capacity combustor can be used. There is an effect that the turbocharger can be driven even when the combustion gas is supplied, and thus a corresponding electric output can be obtained from the rotating electric machine of the turbine shaft.

[Brief description of drawings]

FIG. 1 is a sectional view showing a main part of an embodiment of the present invention.

FIG. 2 is a perspective view of a diaphragm ring used in this embodiment.

[Explanation of symbols]

 1 ... Turbocharger 2 ... Rotating electric machine 3, 4 ... Throttling ring 5 ... Air cylinder 6 ... Bypass passage 7 ... Combustor 11 ... Turbine 13 ... Compressor 17 ... Intake pipe 18 ... Exhaust pipe

Claims (1)

[Claims] 1. A rotating electric machine mounted on a turbine shaft of a turbocharger, which is driven by exhaust energy of an engine to compress intake air, and throttles for narrowing a gas passage to a turbine of the turbocharger and a compressed air passage from a compressor. Means, a combustor of the fuel arranged in the bypass flow path provided between the gas flow path and the compressed air flow path, and each of the throttling means are actuated to operate the combustor to generate a turbine torque with a rotary electric machine. A power generation device for a vehicle, comprising: a power generation control unit that outputs electric power from the power generation unit.