JPH01121516A - Control device for turbo charger with rotary electric machine - Google Patents

Abstract

PURPOSE:To prevent operating incapability because of shortage of battery capacity by disconnecting battery from motor when the battery voltage drops below the normally standard voltage during operation in the motor mode. CONSTITUTION:When the rotary electric machine 7 of a turbo charger 6 is driven in the motor mode, the measured value of battery voltage is compared with the battery reference value, and when the measurement is greater than the reference value, a battery charging circuit is turned on and also a motor circuit turned on. When the measurement of battery voltage is smaller than the reference value, the motor circuit is disconnected from battery, provided that battery 6a is connected as a motor to the rotary electric machine 7 by hand only in case of emergency.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a control device for a turbocharger with a rotating electric machine.

(Prior Art) The output of an internal combustion engine is obtained by mixing and combusting fuel and air, so in order to increase the output, it is necessary to pressurize a large amount of air into the cylinder corresponding to the output.

For this reason, recently, turbochargers have been developed that use the energy of exhaust gas to drive a turbine, which drives a compressor that presses supercharged air into a cylinder to efficiently burn fuel. They are increasingly being attached to internal combustion engines.

That is, by attaching a turbocharger to an internal combustion engine, the air filling efficiency can be increased, resulting in higher output and torque, and there are advantages in that fuel efficiency can be improved.

(Problem to be solved by the invention) However, in such a turbocharged internal combustion engine, charging efficiency decreases due to low supercharging pressure in the low speed range, resulting in insufficient improvement in output and torque. Sometimes it happened.

For this reason, in order to improve the torque in the low-speed rotation range such as when the vehicle is mounted, an attempt was made to install an electric motor-generator driven by a turbine and operate it as either an electric motor or a generator depending on the operating state of the internal combustion engine. 60-195329
It is proposed in the Publication No.

In this type of proposal, when climbing steep slopes at high speed, it is necessary to operate the electric motor-generator as a motor, but on long climbing routes, it is necessary to supply power to the electric motor for a long time, and therefore the power supply There was a problem that the battery capacity was insufficient.

Therefore, the present invention aims to solve the problems of the prior art and provides a control device for a turbocharger with a rotating electric machine.

(Means for Solving the Problems) In order to achieve the above object, the rotary telegraph turbocharger control device of the present invention is configured as follows. That is, in a control device for a turbocharger with a rotating electrical machine that is equipped with a rotating electrical machine serving as an electric motor-generator attached to the turbocharger, the voltage comparing means measures the voltage of the battery and compares it with a reference voltage, and the voltage comparing means control means for turning on/off the connection between the rotating electric machine and the battery based on the signal;
The present invention is characterized by comprising an operation means for manually operating the control means in an emergency.

(Function) With the above configuration, according to the present invention, when the rotating electric machine provided in the turbocharger is operated in the electric motor mode, the capacity of the battery that supplies power to the electric motor becomes insufficient when the vehicle climbs up a slope, etc., making it inoperable. I try not to become like that. Also,
In an emergency, the electric motor is manually connected to the battery, so the driving force of the electric motor can be obtained even in an emergency.

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

FIG. 1 is a configuration block diagram showing an embodiment of the present invention. In the figure, 1 represents air taken in by an engine through an intake pipe 1a, and fuel supplied from a fuel tank 2a through an injector 2. The combustion energy rotates the wheels 3 to drive the vehicle, and the exhaust gas after combustion is discharged through the exhaust pipe 1b. The engine 1 includes a clutch 4 that connects and disconnects engine torque by pressing a clutch pedal 4a, and a transmission 4b that changes the engine torque.A clutch sensor 4C is attached to the clutch 4 to detect whether or not the engine torque is connected. , the detected signals are sent to an electronic control device 5, which will be described later. Further, IC is an engine rotation sensor, and 2b is an accelerator pedal sensor attached to the accelerator pedal 2d, which sends a detected engine rotation signal and an engine load signal corresponding to the amount of accelerator depression to the electronic control unit 5, respectively.

A turbocharger 6 is connected to the exhaust pipe 1b and the intake pipe 1a, and has a turbine 6b driven by exhaust gas energy and a compressor 6a that supercharges intake air, and a rotating shaft 6C connecting these two. A rotating electric machine 7 that operates as an electric motor or a generator is attached to the rotary electric machine 7 . When the turbine 6b is rotationally driven by the exhaust energy, the rotating electrical machine 7 enters the generator mode, and the generated power is transmitted to the power converter 7a, and the operation of the power converter 7a charges the vehicle-mounted battery 5a. .

The power converter 7a includes a rectifying and smoothing circuit that converts AC power into DC power, a converter circuit that freely converts the voltage of DC power, an inverter circuit that converts DC power into AC power whose frequency can be adjusted, and a semiconductor control element. The electronic controller 5 is equipped with various heavy-power control circuits such as a duty control circuit that controls voltage and current using the electronic control device 5, and the various heavy-power control circuits are controlled by control commands from the electronic control device 5. Therefore, when increasing the torque of the engine 1, the DC power from the battery 5a is converted and supplied to the rotating electric machine 7, and the compressor 6a is driven in the electric motor mode.
It operates to compress intake air and increase the supercharging pressure to the engine 1.

18 in the figure is a bypass actuator that controls the exhaust flow path to narrow the flow path and increase speed when exhaust energy is small, and 1d is a boost pressure sensor attached to the intake pipe 1a that controls the intake pressure. 6d is a turbine sensor attached to the rotating shaft 6C that detects the rotation speed of the turbocharger 6, and 7b is a phase sensor attached to the rotating electrical machine 7 that detects the difference between the magnetic field of the rotating electrical machine 7 and the output of the rotor. The phase detector 7c is a voltage sensor that measures the voltage of the rotating electrical machine 7, and the detected signals from each are sent to the electronic control device 5.

The electronic control unit 5 is composed of a microcomputer, and includes a central processing unit that inputs signals from the various sensors described above and performs arithmetic processing and comparison of counts, etc., various memory devices that store control programs and various data, and various other components. The injector actuator 2c also issues a signal to the injector actuator 2c to increase the amount of fuel supplied to the engine 1.

The various memories of the electronic control device 5 include data on the intake boost pressure corresponding to the fuel supply amount corresponding to the accelerator pedal position, data on the engine speed corresponding to the accelerator pedal position, maps corresponding to these, etc. is stored.

FIGS. 2 and 3 are flowcharts showing the processing procedure of the present invention. Next, the flowchart shown in FIG. 2 will be explained.

First, in step P1, a signal from the engine rotation sensor 1c is read and it is checked whether the engine rotation is idling. If the engine rotation is idling, the process moves to steps P2 to P. When the engine is idling, the exhaust energy is low, so the bypass actuator is controlled to increase the exhaust flow velocity and the turbine rotation is accelerated, and the voltage sensor 7c detects the generated voltage V from the rotating electric machine 7 operating as a generator. It is checked and compared with the battery voltage V, and if the generated voltage is high, the high frequency coil is duty-controlled, and then the process proceeds to step P41, where battery charging control is performed.

If the engine rotation is not idling in step P1, the process advances to step P6 to check whether the clutch is engaged or disengaged. Here, when the signal from the clutch sensor 4C is connected, the process moves to step Pa, and when it is disconnected, the process moves to step P7, and the process of step P6 is repeated.

In step P8, the signal from the accelerator pedal sensor 2b is read, and in step P9, it is checked whether the amount of depression is partial or full.If the amount of depression is 0, the signal from the accelerator pedal sensor 2b is read.
-Move to PI3. And engine rotation sensor IC
and the boost pressure sensor 1d, calculate the intake pipe boost pressure pat corresponding to the fuel supply amount at the partially depressed accelerator pedal position, and find the difference between the obtained FBI and the current boost pressure P□.

Next, the process moves to steps P14 to P16.

Here, the calculation of the electric power to be supplied to the drive motor (rotating electric machine 7) for increasing the boost pressure required for acceleration, the detection of the turbine rotation by the turbine sensor 6d, the determination of the voltage increase duty, and the operation of the voltage increase converter are performed. Then, the phase is determined by the position sensor and processing is performed with the inverter operation.

If the accelerator is fully depressed in the process of step P9, the process proceeds to steps PI9 to P22, reads the engine rotation signal from the engine rotation sensor 1c, and sets the maximum power to be supplied to the rotating electric machine 7 in the electronic control device 5. The CPU detects the turbine rotation from the turbine sensor 6d, and detects the current boost pressure from the boost pressure sensor 1d. Then, in step P23, the maximum boost pressure and the current boost pressure are compared, and when the current boost pressure has not reached the maximum boost pressure, the process moves to step P3°, and when the current boost pressure has reached the maximum boost pressure, , steps P24-P2. Proceed to processing.

Here, the voltage increase converter is activated, the phase is determined by the position sensor, the inverter is activated, the current boost pressure is detected, and the fuel supply is increased.

Next, in step P2♂, the increased boost pressure Pa caused by the inverter control of the drive motor is detected in step P2♂, and in step P29, control is performed to increase the supplied fuel, and then step P. Then, the degree of increase in boost pressure is checked, and if the boost pressure has increased more than a predetermined value, steps Pa1-P33 are performed. Here, the accelerator position and engine speed are detected to determine whether the rotating electric machine is in electric motor mode or generator mode. If it is electric motor mode, step P
34 to P3g.

In this process, the motor drive power is calculated and the turbine rotation speed is detected. This controls the power supply voltage from the battery so that the electric motor is operated at a predetermined driving force and rotation speed, and the inverter controls the phase and voltage. Next, the boost pressure is detected and the fuel flow rate is controlled. The process returns to step P1.

Next, when it is determined that the rotating electrical machine is in the generator mode in the process of step pss, the CPU determines whether it is in turbo operation (T) or generator operation (G) in step P4゜. , in the case of turbo operation, the generator relay is cut in step P4m; in the case of zero generator operation, the generated voltage is measured in step P43.

Next, in step P44, the generated voltage vL and the battery voltage V
If the generated voltage is higher, step P4S
The voltage is measured at step P46, and duty control of the high frequency coil is performed at step P46, and the process proceeds to step P46. Furthermore, in the process of step P44, the generated voltage vL
If the battery voltage V is greater than
At step 7, voltage control is performed by duty control of the high frequency coil. Then, in step P4B, the battery energizing circuit is controlled, and in step P49, it is confirmed that the battery is charged. If the battery is not charged, step P. generates a fault signal.

FIG. 3 is a flowchart showing a processing procedure for controlling the motor of a turbocharger according to the present invention. Next, this flowchart will be explained.

When the rotating electric machine of the turbocharger is driven in the electric motor mode, the battery charging circuit is turned off in step PaO, and the battery voltage is measured in step Pal. Battery voltage measurement value vr and battery reference voltage Va at this time
(battery voltage for normal maintenance) and step PII
2, and if the measured value is larger than the reference voltage, turn on the battery charging circuit in step PII3, and
Turn on the motor circuit in step ps4. When the measured value of battery voltage is smaller than the reference value, step P
The motor circuit is disconnected from the battery in II8, but the battery is manually connected to the motor only in an emergency in step Pe16. As a result, in an emergency, the electric motor is driven and the boost pressure is increased. Note that a comparator for comparing the measured value of the battery voltage with a reference value and a means for controlling on/off of the motor according to the output of the comparator are provided in the electronic control device 5, and a means for manually connecting the motor is provided separately. established in

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

(Effects of the Invention) As explained above, according to the present invention, when the electric motor-generator attached to the engine turbocharger is operated in electric motor mode, the voltage of the battery serving as the power source is detected and compared with a reference value. However, if the battery voltage drops below the normal maintenance voltage, such as when climbing a steep slope, the motor and battery are disconnected, thereby preventing inoperability due to insufficient battery capacity. Furthermore, since the electric motor is manually connected to the battery in an emergency, the boost pressure can be increased by the driving force of the electric motor even in an emergency.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG.
FIG. 3 is a flowchart. 1... Engine, 5... Electronic control device, 5a...
Battery, 6...turbocharger, 7...rotating electric machine. Patent applicant: Isu-X Automobile Co., Ltd. Agent: Minoru Tsuji, patent attorney

Claims (1)

[Claims] In a control device for a turbocharger with a rotating electrical machine that is equipped with a rotating electrical machine that serves as an electric motor-generator attached to the turbocharger, a voltage comparing means for measuring the voltage of the battery and comparing it with a reference voltage, and a signal of the voltage comparing means 1. A control device for a turbocharger with a rotary electric machine, comprising: a control means for turning on/off a connection between the rotary electric machine and a battery based on the above, and an operation means for manually operating the control means in an emergency.