JPH02181025A - Controller for turbocharger with electrically driving mechanism - Google Patents

Abstract

PURPOSE:To quickly eliminate the knocking, assisting a turbocharger by means of a motor by stopping the power supply to the motor, which is installed to a rotating shaft of the turbocharger, when knocking of an engine is detected. CONSTITUTION:In a turbocharger 2, a turbine 21 is rotated by the exhaust gas, which is exhausted from an exhaust pipe 12 of an engine 1, and consequently a compressor, which is concentric with the turbine 21, is rotated, thereby supercharging the suction air, which is sucked into a suction pipe 11 of the engine 1. In this case, a revolving, electric machine 3 is provided to a rotating shaft, which connects the turbine 21 to the compressor 22. In addition, the revolving, electric machine 3 is power-run as a motor by the power supplied from a battery 5, thereby energizing the compressor 22. When occurrence of knocking is detected, based on a detecting signal from a knock sensor installed to the engine 1, power supply to the revolving, electric machine 3 is stopped by a controller 9.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a control device for a turbocharger with an electric mechanism attached to a gasoline engine.

(Prior Art) When a turbocharger is attached to a normal gasoline engine and boost pressure is increased to increase torque at low speeds, knocking tends to occur. Generally, in such cases, a knock sensor is provided in the gasoline engine, and when knocking is detected, the ignition timing is delayed to avoid the knock zone.

(Problem to be Solved by the Invention) In such a conventional gasoline engine equipped with a turbocharger, an electric mechanism serving as a motor generator is arranged on the rotating shaft of the turbine, and the motor or generator is activated depending on the operating state of the engine. Japanese Patent Laid-Open No. 59-14171 proposes that the engine be driven as a machine to improve engine output and recover exhaust energy.
No. 1, JP-A-60-195329, and other publications.

However, if knocking occurs while the electric motor is operating, the turbocharger consumes power due to the electric motor operation, even though the torque is reduced by timing retard, and the boost pressure continues to rise, causing knocking. The problem was that it was impossible to solve the problem.

The present invention was made to solve the above problems, and
It is an object of the present invention to provide a control device for a turbocharger with an electric mechanism that can promptly eliminate knocking when it occurs.

(Means for Solving the Problems) According to the present invention, an electric motor provided on the rotating shaft of a turbocharger, a knock determination means for determining knock of an engine supercharged by the turbocharger, and a It is possible to provide a control device for a turbocharger with an electric mechanism, which includes a control means for stopping power supply to an electric motor.

(Function) In the control device for a turbocharger with an electric mechanism of the present invention,
When receiving a signal indicating the occurrence of knock from the knock determination means, the turbocharger motor operation is stopped, and when the motor is running, it is determined whether knocking is occurring or not, and then power is not supplied to the electric motor. I try to do it.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

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

In the figure, 1 is the engine. This engine is an insulated engine that uses fine ceramics for the cylinder, cylinder head, inside of the intake and exhaust path, piston rings, piston head, valves, etc., and does not require a radiator to cool the engine. That is.

The vehicle is driven by the combustion energy of the air taken in through the intake pipe 11 and the supplied fuel, and the exhaust gas after combustion is discharged through the exhaust pipe 12.

This engine 1 is provided with a knock sensor 13 that determines engine knock.

2 is a turbocharger, which includes an intake pipe 11 and an exhaust pipe 12.
When the turbine 2 is rotationally driven by exhaust gas energy discharged from the exhaust pipe 12, supercharging is carried out through the intake pipe 11 by the compressor 22 disposed coaxially with the turbine 2. Air is forced into the engine 1.

3 is a rotating electric machine attached to the rotating shaft of the turbine 21 and the compressor 22, and when driving power is supplied, it operates as an electric motor to energize the compressor 22 and assist the supercharging operation of the turbocharger 2. For example, in order to improve the engine output when an engine with little exhaust energy is running at low speed and under high load, power is transmitted to the rotating electric machine 3 to increase the supercharging pressure.

Reference numeral 4 denotes a power converter, which converts the DC power from the battery 5 into AC power of a predetermined frequency and transmits the power to the rotating electrical machine 3 to drive the rotating electrical machine 3. For example, it is used to power heavy electrical equipment such as an inverter or a voltage booster. When the power switch 41 is closed, the power converter 4 operates as an inverter, applies a predetermined power to the rotating electric machine 3, or acts as a regulator, and charges the battery 5 from the rotating electric machine 3.

Reference numeral 6 denotes a power meter, which is equipped with a non-contact type measuring section 61 using a Hall element, and can measure the current value, current direction, voltage, etc. of the circuit passing through the measuring section 61, and has a built-in microcomputer. There is.

Therefore, in addition to calculating the integral value of the measured current and the integral value of electric power, control diagrams for the rotating electric machine described later, data related to battery temperature and terminal voltage, etc. are stored as a data map. The stored data map is searched to obtain desired data.

7 is a normal electrical load such as a lighting lamp installed in a vehicle,
Electric power is supplied from the battery 5, and 51 is a liquid temperature meter that detects the liquid temperature of the battery 5. Its output is connected to a power meter 6, and a signal based on the battery liquid temperature is sent to the power meter. Output to 6.

81 and 82 are warning lights, which indicate the amount of electricity stored in the battery 5 (
This is a warning that the charging rate (charging rate) has decreased and charging is required.If both warning lights 81 and 82 are on, if charging is urgently required, the warning light 81 is on and the warning light 82 is on. When it is off, it indicates that rapid charging is required, and a command to turn on the stiffness warning light is issued from the power meter 6.

A controller 9 generates a command signal for controlling the energization switch 41. This controller 9 is supplied with signals such as the knock sensor 13, the battery 5 voltage, the booth 1 pressure of the turbocharger 2, and the engine rotation speed.

When a knock signal is received from the knock sensor 13,
The motor operation of the turbocharger 2 is stopped, and when the motor is operated, power is supplied to the rotary electric motor 3 after determining whether knocking has occurred.

FIGS. 2 and 3 are control diagrams of the rotating electric machine in such a case, and processing flow diagrams showing an example of related operations. Next, the processing will be explained.

First, in steps 1 to 3, as an initial setting, the terminal voltage and temperature of the battery under no load are measured, and the charging rate of the battery is read from the data map.

In step 4, start the engine, operate the turbocharger and rotating electric machine, and in step 5.6 read the battery voltage, battery current, engine speed, boost pressure, etc., and calculate the current charging rate Cc and the battery current. In addition, the target boost pressure pt is read out in step 7.

In step 8, the calculated charging rate is checked and if it is less than 60, both warning lights 81 and 82 are turned on to warn you.
The electric motor of the rotating electric machine is stopped and the battery is urgently charged by the generator (Step 9).
．． 10).

If the charging rate is 60 or higher in step 8, step 11
Proceed to. Here, the charging rate is checked, and if it is 75 or less, in step 12, the warning light 81 is turned on, the warning light 82 is turned off, only one of them lights up to display a warning about the charging status, and the engine is commanded to accelerate. Proceed to the next step 13 to determine whether or not it is. If it is under acceleration, proceed to step 14.15, turn off the energization switch 14 to the turbocharger motor, stop the inverter, and stop the operation as a regulator,
Accelerate the engine.

If it is not accelerating in step 13, step 16
, and follow the mode judgment of the rotating electric machine 3. That is, in the electric mode or when there is no mode setting, the process proceeds to step 14.15 and charging and discharging of the battery is stopped. When in charging mode, rapid charging is performed in step 17.

Check the charging rate in step 11 above, and if it is 75 or higher, proceed to step 18 and turn off both warning lights 8182 to indicate that the charging state is good (see Figure 3 (B).
)). If the charging state of the battery is good, and the charging rate is 80 or less in step 19, proceed to step 20, and if it is accelerating, proceed to step 21 to check for engine knocking before accelerating the turbocharger. If knocking is not occurring, the boost pressure is increased by accelerating operation in step 22.

If acceleration is not commanded in step 20 above, the process proceeds to step 23, and according to the mode judgment of the rotating electrical machine 3, if it is in electric mode, knocking is checked in step 30, and then the process proceeds to step 31. Electric power is supplied to the electric machine 3 to cause the motor to operate. Further, when in charging mode, rapid charging is performed by the output of the rotating electric machine 3 operating as a generator (step 24).

If the charging rate is 80 or higher in step 19, step 2
The process proceeds to step 5, and if it is determined that acceleration is required, the process returns to step 21, but if there is no acceleration command, the process proceeds to step 26. In other words, when acceleration is not required, the mode of the rotating electric machine 3 is determined in step 26, and in the case of charging mode, step 2
In step 7, the charging rate is compared with 120, and if it is less than 120, normal charging is performed in step 28. Further, if the charging rate is 120 or more, the voltage value is checked in step 29, and if it is 14.5V or less, step 28 is checked.
However, if the voltage exceeds 145V, overcharging occurs, so charging is not performed. In other words, step 21 above
．． As in the case where knocking is detected in step 30, the process proceeds to step 3233, where the energization switch 14 is turned off for the turbocharger motor, the inverter is stopped, and the operation as a regulator is also stopped.
Rotate the engine.

As above, this invention has been described in some detail with respect to its most preferred embodiment, but the description of the preferred embodiment does not include variations in detailed parts of the configuration or contrary to the spirit of the invention as described in the claims. It is clear that various modifications or combinations thereof may be made.

(Effects of the Invention) As explained above, according to the present invention, when the electric motor is operated by the turbocharger, the state of knocking of the engine is known, and the acceleration operation and motor operation are performed in a state without knocking. It is possible to provide a control device for a turbocharger with an electric mechanism that can quickly eliminate knocking by stopping electric motor operation when knocking occurs.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a diagram showing the control mode of the rotating electrical machine, and FIG. 3 is a processing flow diagram showing an example of the operation related to this embodiment. be. 1...Engine, 2...Turbocharger, 3...
・Rotating electric machine, 5... Battery, 6... Power meter,
13...Knock sensor. Patent applicant: Isuy Automobile Co., Ltd. Patent attorney: Minoru Tsuji

Claims (1)

[Claims] An electric mechanism comprising: an electric motor provided on a rotating shaft of a turbocharger; a knock determination means for determining knock of an engine supercharged by the turbocharger; and a control means for stopping power supply to the electric motor when the knock is determined. Turbocharger control device.