JPS63248924A - Power unit by turbocharger with rotary electrical machine - Google Patents

Abstract

PURPOSE:To make electric power generable even in case of stoppage of an internal combustion engine by driving a turbocharger with combustion gas out of a combustor, and making the rotary electrical machine installed in this turbocharger operate as a generator, while converting the generated power into AC power equivalent to a commercial power source. CONSTITUTION:In a turning shaft 2c of the turbocharger 2 connected to an exhaust pipe 1b of an internal combustion engine 1, there is provided with rotary electrical equipment 3. On the other hand, fuel out of a tank 4a is gasified by a glow plug 4b, and this is mixed with air out of an intake pipe 4c, then there is provided with a combustor 4 which is ignited by an ignition glow plug 4d. And, combustion gas out of the combustor 4 is fed to a scroll chamber 2e at the turbine side of the turbocharger 2 through a pipe 4e, thereby driving a turbine blade 2a, and the rotary electrical equipment 3 is operated for power generation. In addition, the generated power out of the rotary electrical machine 3 is converted into voltage and electric power of DC frequency equivalent to a commercial power source, whereby it is fed to a current consumer 7 for commercial power use.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides a power source using a turbocharger with a rotating electric machine that generates electricity by providing a rotating electric machine that serves as an electric generator to a turbocharger that is driven by exhaust energy of an internal combustion engine. Regarding equipment.

(Prior Art) A power generation device is attached to an internal combustion engine that serves as the motive force of a vehicle, and the electric power generated by driving the internal combustion engine is used as a power source for electrical equipment related to the vehicle.

On the other hand, a particular proposal has been made for a turbocharger for an internal combustion engine, in which an electric generator is attached to the rotating shaft of the turbocharger, which is driven by the exhaust energy of the internal combustion engine, and operates as either an electric motor or a generator depending on the operating state of the internal combustion engine. It is disclosed in JP-A-60-195329.

(Problem to be Solved by the Invention) In the above-mentioned power generation device attached to the internal combustion engine and the electric motor-generator proposed above, power generation is performed using the combustion energy of the internal combustion engine, so when the internal combustion engine is stopped, the power generation device is In addition, since it is a DC power source for on-vehicle electrical equipment, it cannot be used for AC electrical equipment for commercial power supply.

The present invention was made in view of such problems,
The purpose of this is to attach a rotating electrical machine that serves as an electric generator to the rotating shaft of the turbocharger, and to install a fuel combustor separate from the internal combustion engine so that the turbocharger is driven by the exhaust gas of the internal combustion engine and the combustion of the combustor. Another object of the present invention is to provide a power supply device using a turbocharger with a rotating electrical machine that converts generated power from a rotating electrical machine operated by a generator into a power source that can be used for commercial electrical equipment.

(Means for Solving the Problems) According to the present invention, an electric motor directly connected to the rotating shaft of a turbocharger supercharges intake air using exhaust energy of an internal combustion engine.
A rotating electrical machine serving as a generator, a combustor that burns fuel separately from the internal combustion engine, and a drive that drives the turbocharger using combustion gas from the combustor and exhaust gas from the internal combustion engine to cause the rotating electrical machine to generate electricity. A power supply device using a turbocharger with a rotary electric machine is provided, which includes means for converting the generated output into alternating current power having the same voltage and frequency as a commercial power source.

(Function) In the present invention, a turbocharger is driven by the exhaust gas of the internal combustion engine and combustion gas from the combustor, the rotating electric machine is operated as a generator, and the generated power is transferred to a voltage similar to that of a commercial power source by a power converter. It has the effect of converting into alternating current power.

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

FIG. 1 is a block diagram showing an embodiment of the present invention.

In the figure, reference numeral 1 denotes an internal combustion engine, which uses combustion energy of air taken in through an intake pipe 1a and fuel supplied as a motive force for the vehicle (not shown). The exhaust gas after combustion is discharged.

2 is a turbocharger connected to the exhaust pipe 1b;
a turbine blade 2a driven by exhaust gas;
Compressor blade 2b that pressure-feeds intake air to the intake pipe 1a
A rotating electric machine 3 serving as an electric motor or a generator is provided on the rotating shaft 2c directly connected to the rotating shaft 2c. When the rotor 3a attached to the rotating shaft 2c is driven to rotate at high speed by the exhaust energy, AC power is generated in the stator 3b provided corresponding to the rotor 3a, and is transmitted via a power converter to be described later. The power is then transmitted to the electrical load. Note that 2d is a bearing that supports and holds the rotating shaft 2c that is driven at high speed.

4 is a combustor, which mixes fuel supplied from a fuel tank 4a and vaporized by a vaporizing glow plug 4b with air fed through an air introduction pipe 4c, and ignites it with an ignition glow plug 4d to cause combustion. It is something that makes you The air introduction pipe 4c is communicated with the intake pipe 1a, fresh air is sent by the compressor blade 2b of the turbocharger 2, and the combustion gas vibe 4e from the combustor 4 is connected to the turbine side scroll 2e of the turbocharger 2. The combustion gas after combustion is configured to drive the turbine blades 2a.

1c shown in FIG. 1 is an intake pipe valve that is installed in the intake pipe 1a to control the amount of intake air into the internal combustion engine 1, and 4f is a combustion air valve that is installed in the air introduction pipe 4c and controls the intake air amount to the combustor 4. A combustion gas valve 4g that controls the amount of combustion air is provided in the combustion gas vibrator 4e to control the flow rate of combustion gas to the turbine side scroll 2e, and is controlled by a boost actuator 5a, an air valve actuator 5b, and a gas valve actuator 5c, respectively. Each flow rate is configured to be controlled. Note that control commands to these various actuators are issued from the controller 6.

The vaporizing glow plug 4b is formed of a ceramic pipe equipped with a heater inside, and by energizing the heater having a temperature coefficient of resistance, it vaporizes the supplied fuel and releases it from the nozzle at the tip of the combustor 4. Sprays vaporized fuel inside. Then, the appropriate temperature for vaporizing the fuel, e.g.
In order to control the temperature of the heater to around 00°C, the controller 6 is equipped with a resistor 4j connected in series to the heater, and a changeover switch 4 that short-circuits the resistor 4j.
The switching switch 4k is controlled to open and close using a timer mechanism to maintain an appropriate vaporization temperature by measuring the change in resistance value when the heater is energized.

The ignition glow plug 4d is equipped with a heater having a temperature coefficient of resistance, and ignites the vaporized fuel by energizing the heater, and the energizing circuit includes a resistor 4J2 connected in series and the resistor 4λ short-circuited. 4m selector switch
It is equipped with Then, in order to control the ignition temperature to an appropriate ignition temperature for igniting the vaporized fuel, for example around 900°C, the controller 6 measures the change in the resistance value of the heater when electricity is applied, and
By controlling the opening and closing of the changeover switch 4m using a timer mechanism, the temperature of the ignition glow plug 4d is maintained at an appropriate ignition temperature. A flame sensor 4n detects the combustion state inside the combustor 4 and sends a signal to the controller 6.

Reference numeral 9 denotes a power converter, which converts the power generated from the rotating electric machine 3 when the generator is operated into power that can be supplied to electrical equipment for commercial power supply as an output.

FIG. 2 is a circuit block diagram of an example of a power converter used in this embodiment, including a rectifying and smoothing circuit 91, a power control circuit 9
2. Smoothing circuit 93, battery power 94, power control circuit 9
5, a smoothing circuit 96, an inverter 97, a transformer 98, etc. Then, the alternating current generated power from the rotating electric machine 3 is converted to direct current by the rectifying and smoothing circuit 91, and the passing current is controlled by the Tr provided in the power control circuit 92, and then the choke coil channel of the smoothing circuit 93 and the capacitor C
It is smoothed and becomes direct current. Next, the electric power that has become DC due to the above operation is combined with the DC power from the battery power 94 by the power control circuit 95, the passing power is controlled by the command of the controller 6, and the inverter 97 passes through the smoothing circuit 96 to convert the DC power to, for example, 50 Hz. is converted into alternating current. After the voltage is stepped up to a voltage value of, for example, 100 cm by the transformer 98, AClooV and 50 Hz power is supplied to the electric load 7 for commercial power supply via the measuring circuit 7a. The controller 6 inputs signals from the battery 8 and the output of the transformer 98, and issues control commands to the power control circuit 92.95 and inverter 97 to control the voltage to a predetermined voltage value and AC frequency.

The power converter 9 also includes a power controller consisting of an inverter that converts DC power from the battery 8 into AC power to drive the rotating electric machine 3.
It is configured to measure the voltage value and power value of the AC power supplied to the controller 6, and to send the respective values to the controller 6.

The controller 6 consists of a microcomputer, and includes an internal combustion engine 1, a turbocharger 2, a rotating electric machine 3, a combustor 4,
A central processing unit that inputs the operating status of each power converter 9, etc. and performs arithmetic processing, timer processing and counting processing for energization of various glow plugs, and control programs for the rotating electric machine 3 of the turbocharger 2 and the combustor 4, etc. It is equipped with various memory devices for storage, input/output devices that receive various input commands and issue control commands to fuel supply routes, various actuators, power converters, etc.

In addition, 1d is an engine tachometer that detects the rotation speed of the internal combustion engine 1, 2f is a boost pressure gauge that detects the boost pressure of the turbocharger 2, and 10 is a thermometer that detects the atmospheric temperature, and the detected signals are sent to the controller 6. Send to.

FIG. 3 is a process flow diagram showing an example of the operation of this embodiment, and the process will be explained using the same figure.

First, in order to supply combustion air to the combustor 4, in step 1.2, the intake pipe valve 1c is closed, the combustion air valve 4f of the air introduction pipe 4c is opened, and the air is supplied from the battery 8 via the power converter 9. In step 3, the compressor blades 2b are driven to supply air to the combustor 4 through the air introduction pipe 4c.

In step 4, in order to know the temperature of the ignition glow plug 4d, the selector switch 4m provided in the current-carrying circuit is closed, the resistor 4ft is short-circuited, and the controller 6 sends a current to measure the resistance value of the heater of the ignition glow plug 4d. is applied to calculate and measure the resistance value of the ignition glow plug 4d. Since the heater uses a resistor having a temperature resistance coefficient, the temperature change can be detected by the change in resistance value. Therefore, in step 5, the resistance value R1 of the ignition glow plug 4d is compared with a predetermined resistance value R. , FLI <R, the process proceeds to step 6 and the ignition glow plug 4d is energized.

In Stepf, the resistance value R1 of the ignition glow plug 4d after energization and the resistance value R3 when the heater temperature is 900°C.
゜. When Rr>R90G, the ignition temperature has been reached, so the process proceeds to step 8 and energizes the chemical glow plug 4b. Note that in step 7, the resistance value R0 of the ignition glow plug is Ro. . If not, in steps 9 and 10, the resistor 41 of the energizing circuit of the ignition glow plug is
After turning on the changeover switch 4m for a predetermined period of time under timer control to increase the current and hasten the temperature rise, the process proceeds to step 8 to energize the vaporizing glow plug 4b. The timer is set according to the value of resistance value R1.

Also, in step 5, the resistance value R of the ignition glow plug 4d is
, has reached the predetermined value R, the atmospheric temperature TAM is checked in step 11 based on the signal from the thermometer 10.

If the atmospheric temperature T□ has not reached the predetermined value T, the ignition glow plug 4d is energized in step 12, and the resistance value R of the ignition glow plug is set to Ro in step 13. . Compare with.

At this time, if the resistance value Rr has not reached R9oo, control is performed in steps 14 to 15 to turn on the changeover switch 4m and strengthen the current to the ignition glow plug 4d. Incidentally, when the atmospheric temperature TAM has reached the predetermined value T2 in step 11, the energization of the ignition glow plug 4d is simply performed by timer control of the changeover switch 4m in steps 16 to 18, and the process proceeds to step 20. This operation is to change the ignitability of the fuel depending on the temperature environment and achieve reliable ignition.

After energizing the vaporizing glow plug 4b in step 8, the resistance value R8 of the vaporizing glow plug 4b is checked in step 19, and the resistance value R4° when the vaporizing glow plug 4b reaches 400°C. and R6. And the resistance value R
8 is R4°. If the temperature reaches 100, the temperature is sufficient to vaporize the fuel, so the process proceeds to step 20, where the fuel valve 4h is opened to supply fuel from the fuel tank 4a to the vaporizing glow plug. Note that if the resistance value R6 does not reach R400 in step 19, the vaporization of the fuel is insufficient, so steps 21 to 2 are performed.
In step 2, the resistor 4j of the energizing circuit of the vaporizing glow plug 4b is short-circuited by the changeover switch 4k to increase the supply current, and after controlling the energization time with a timer, fuel supply is started in step 20.

A predetermined time is counted after the start of fuel supply, and in step 24, the combustion state inside the combustor 4 is checked using the signal TF3 from the flame sensor 4n. Here T
, s is higher than the predetermined temperature T3, the process proceeds to step 25, where the fuel valve 4h is controlled to increase the fuel flow rate, the increased combustion gas drives the turbine blade 2a, and the boost pressure is increased by operating the compressor blade 2b. When it is confirmed by the flame sensor 4n that combustion is reliable, the ignition/vaporization glow plug is turned off. Then, in step 26, the boost pressure is checked using the boost gauge 2f, and the predetermined pressure is P! When the boost pressure PB reaches 10 or higher, the power supply to the rotating electrical machine 3 is turned off to stop the motor operation (step 27).

Note that if the boost pressure P6 has not reached PBo in step 26, the fuel flow rate is further increased to promote combustion.

Next, since the rotating electrical machine 3 driven by the energy of the combustion gas becomes a generator, the generated voltage V is checked in step 28. If the generated voltage V is a predetermined voltage, for example, 24 V or higher, the process proceeds to step 30, and a signal indicating completion of generation preparation is sent to the controller 6. In addition,
If the generated voltage does not reach the predetermined voltage in step 28,
In step 29, combustor 4 is used to increase combustion energy.
increase the amount of fuel supplied to

After the preparation for power generation is completed in step 30, the process proceeds to step 31, where a command is issued to the power converter 9, and control settings are made so that the power control circuit and inverter output a predetermined voltage. Then, in step 32, it is determined whether or not to supply electric power to the electric load, and if so, in step 33, the demand power of the electric load 7 is calculated, and in step 34, the current generated power and the electric load 7 are calculated. A comparison is made with the power demand. here,
If the generated power is smaller than the demanded power, the process proceeds to step 37, where the fuel supplied to the combustor 4 is increased, the combustion gas energy is increased, and the generated power and the demanded power are compared again in step 38, and the generated power is determined to be larger. If so, proceed to step 39. In addition, in the comparison flow of step 34, if the generated power is larger than the demanded power, the fuel flow rate is decreased in step 35, and if the generated power is slightly larger than the demanded power (load power + ΔW), the process proceeds to step 39. Become. In step 39, the voltage control of the power control circuit of the power converter 9 is set, and in step 40, it is compared with the signal from the measurement circuit 7a to see if the supplied voltage is higher than 100V. If the supplied voltage is higher than 100V, the process proceeds to step 42, but if it is low, the power control circuit 95 of the power converter 9 is controlled to increase the voltage in step 41.

In step 42, the supply voltage is compared with 110■,
If the voltage is higher than 0■, the process proceeds to step 43 to perform voltage reduction control, so the power supplied to the electrical load 7 is reduced to step 40.
Through the flow of steps 43 to 43, the voltage is controlled and supplied to a voltage value of 100V to 110V.

Then, the flow returns to step 1 and repeats the above-described flow until the power generation is stopped in step 44. However, in the case of power generation being stopped, the power to the ignition glow plug 4d and the vaporization glow plug 4b is cut off in step 45, and the intake pipe is turned off. The pulp 1c, the combustion air valve 4f, and the fuel valve 4h are closed, and further, the operation of the rotating electric machine 3 is stopped.

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

(Effects of the Invention) According to the present invention, fuel is supplied to the combustor that burns fuel separately from the internal combustion engine, and the rotating electric machine provided in the turbocharger is driven as a generator by the energy of the combustion gas from the combustor. The generated power converter converts the generated power into power with the same voltage and AC frequency as the commercial power supply, so the rotating electric machine can generate power even when the internal combustion engine is stopped.
It has the effect of being able to supply AC power to commercial AC electrical equipment that serves as an electrical load.

[Brief explanation of drawings]

FIG. 1 is a configuration block diagram showing one embodiment of the present invention, and FIG.
The figure is a circuit block diagram showing an example of the power converter.
The figure is a processing flow diagram showing an example of the operation of this embodiment. 1... Internal combustion engine, 2... Turbocharger, 3...
・Rotating electric machine, 4... combustor, 6... controller,
7... Electric load, 8... Battery, 9... Power converter.

Claims (1)

[Claims] A rotating electric machine that serves as an electric generator directly connected to the rotating shaft of a turbocharger that supercharges intake air using exhaust energy from the internal combustion engine, a combustor that burns fuel separately from the internal combustion engine, and combustion gas from the combustor. and an exhaust gas from the internal combustion engine to drive the turbocharger to cause the rotating electric machine to generate electricity, and a converting means to convert the generated output into alternating current power having the same voltage and frequency as a commercial power source. A power supply device using a turbocharger with a rotating electric machine.