JPH06229252A - Controller of turbo-charger with dynamo-electric machine - Google Patents

Abstract

PURPOSE:To control discharging from a battery by setting the motor driving conditions of a dynamo-electric machine according to the starting and stopping frequency of a vehicle where a turbo-charger with the dynamo-electric machine is installed. CONSTITUTION:A dynamo-electric machine is installed to a rotating shaft between the turbine 21 and the compressor 22 of a turbo-charger 2 to discriminate the starting and stopping frequency of a vehicle by a controller 5 according to signals from a vehicle speed sensor 7, an engine speed sensor 14 and the like. In the case of high frequency, controlling a power converter 41 restrains discharging from a battery 4 from occurring, thus restraining power consumption.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a turbocharger equipped with a rotary electric machine for efficiently controlling the operation of the rotary electric machine in a vehicle equipped with a turbocharger equipped with a rotary electric machine on a turbine shaft.

[0002]

2. Description of the Related Art A turbocharger is widely used in which exhaust gas of an engine is guided to a turbine to be rotated, a compressor connected to a turbine shaft is driven, and the compressed air is actuated to pump the air supplied to the engine.

Then, a rotary electric machine that serves as a motor-generator is attached to the turbine shaft of this type of turbocharger, and it is electrically driven or operated to generate electricity according to the operating state of the engine.
The engine torque is being increased and the exhaust energy is being used efficiently.

Further, in controlling such a rotary electric machine,
A control device for a turbocharger with a rotating electric machine, which attempts to operate as an optimum boost pressure according to a running condition by checking the boost pressure when the vehicle is running, is disclosed in JP-A-63-302.
No. 131 publication.

[0005]

In the control device disclosed in the above publication, the rotary electric machine is electrically driven to increase the boost pressure according to the running conditions of the vehicle, so that the agile operation of the vehicle is possible. However, in the case of frequent start and stop such as a collection and delivery vehicle, the electric drive of the rotating electric machine also increases, and there is a problem that the electric charge of the battery decreases and the electric drive must be stopped. .

The present invention has been made in view of the above problems, and an object thereof is to judge the traveling pattern of a vehicle and control the electric drive of a rotating electric machine to suppress the power consumption from the battery to achieve stable operation. It is an object of the present invention to provide a control device for a turbocharger with a rotating electric machine that intends to achieve the above.

[0007]

In order to achieve the above object, according to the present invention, a rotary electric machine is attached to a turbine shaft of a turbocharger, and a turbine torque is applied by an electric drive of the rotary electric machine using an on-vehicle battery as a power source. In a control device for a turbocharger with a rotating electric machine that increases a boost pressure to an energizing engine, a battery is protected by controlling the electric drive according to the frequency of starting and stopping of the vehicle equipped with the turbocharger. A control device for a turbocharger with a rotating electric machine is provided.

[0008]

Since the electric drive of the rotating electric machine is controlled according to the frequency of starting / stopping, the number of opportunities for electric drive is reduced in a vehicle with a large number of starting / stopping, so that the reduction in the amount of electricity stored in the battery is suppressed and the vehicle with a small number of starting / stopping is suppressed. In this case, the electric drive of the rotating electric machine is performed at the time of acceleration during traveling, and the acceleration feeling is improved.

[0009]

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

FIG. 1 is a configuration block diagram showing an embodiment of a control device for a turbocharger with a rotating electric machine according to the present invention. In the figure, 1 is an engine, and its exhaust pipe 11
A turbocharger 2 is connected to the intake pipe 12 and the turbocharger 2. The turbocharger 2 is driven by the exhaust gas from the engine 1, and is driven by the torque of the turbine 21 to compress the air and A compressor 22 for pumping supercharged air is provided. A boost pressure sensor 13 is attached to the intake pipe 12 to detect the supercharged air pressure and send it to a controller described later.

Reference numeral 3 denotes a rotating electric machine, which operates as an electric motor or a generator, is arranged on the rotating shaft of the turbocharger 2, and rotates as an electric motor when supplied with power from the battery 4 and is provided with a compressor 12. Then, the supercharging air pressure to the engine 1 is increased. Further, when the exhaust energy from the engine 1 is large, it operates as a generator, and the exhaust energy is recovered as electric power and supplied as charging power for the battery 4.

Reference numeral 41 denotes an electric power converter, which is composed of an AC / DC bidirectional converter having an inverter and a converter, converts the AC output from the rotating electric machine 3 during the power generation operation into DC, and converts it into charging power for the battery 4. , Or when supplying the electric power from the battery 4 to the rotary electric machine 3, the DC power is converted into the AC power having a predetermined frequency in accordance with the command from the controller 5,
The rotary electric machine 3 is accelerated to improve the pneumatic operation of the compressor 22.

Denoted at 6 is an accelerator pedal, which is provided with a depression amount sensor 61 for detecting the depression amount, 14 is an engine rotation sensor for detecting the number of revolutions of the engine 1, and 7 is a vehicle speed sensor, not shown. Is detected, and the respective detection outputs from these sensors are sent to the controller 5.

The controller 5 is composed of a microcomputer, and is provided with a central control unit for performing arithmetic processing, arithmetic processing procedures, various control maps, various memories having timers, input / output devices and the like. When the detection signals from the various sensors described above are input, predetermined processing is performed and a command signal is issued to the power converter 41.

FIG. 2 is a process flow chart showing the control for determining the acceleration of the vehicle by driving the rotating electric machine in this embodiment, and FIG. 3 is a process flow chart showing the control for determining the traveling pattern of the vehicle. The operation of this embodiment will be described with reference to the drawings.

In a vehicle equipped with a turbocharger equipped with a rotating electric machine on a turbine shaft, the motor operation of the rotating electric machine can be roughly divided into the case of increasing the torque at low speed of the engine and the improvement of response during acceleration. Is what is used.

The former torque increase at low speed is directly related to the full load characteristic of the engine, and the electric motor operation in this case cannot be changed, but the latter responsiveness during acceleration is related to feeling. Therefore, it is possible to adjust the power consumption by operating the electric motor by changing this criterion.

Therefore, the acceleration determination constant K shown in FIG.
When the value of * is increased, the frequency of motor operation of the rotating electric machine is reduced, and the decrease in the amount of electricity stored in the battery is reduced.

The flow of FIG. 2 will be described below.
First, in step 1, the accelerator opening signal from the depression amount sensor 61, the rotation speed signal from the engine rotation sensor 14, and the boost pressure signal (PB) from the boost pressure sensor 13 shown in FIG. From the generated map, the target boost pressure (P
Read T).

Next, at step 3, the value of PT-PB is obtained and compared with the acceleration judgment constant K *. If the difference value is larger than the value of K *, the motor is operated as acceleration judgment (steps 4 and 5), and if K * is not reached, it is judged as a steady state in step 6 and the acceleration is postponed. Is.

The determination of the traveling pattern follows the flow of FIG. 3, and the timer is initialized in step 10 of FIG. 3, and steps 11 to 11 for starting and stopping the vehicle are performed.
The time T * (N) is set in the processing of the flow of step 16. Then, such a setting is performed, for example, 10 times (N = 1.
0) Repeat (step 18), calculate the average of these and compare with the constant A (step 19).

When the average is less than the value of A, the acceleration determination constant K * is set to a large value (steps 20 and 21) because the frequency of starting and stopping is high, and the frequency of electric operation of the rotating electric machine is reduced to reduce the battery. Will reduce the number of energization from.

On the other hand, if it is determined in step 22 that the average is larger than the constant B, it is assumed that the start / stop frequency is low, and the acceleration determination constant K * is set to a small value to increase the number of motor operations to accelerate the vehicle during running. The feeling can be improved.

[0024]

According to the present invention as in the above embodiments,
When the frequency of starting and stopping of the vehicle is high, the conditions for acceleration judgment are tightened and the number of electric drive of the rotating electric machine is reduced, so the amount of battery discharge is suppressed. In this case, electric drive is performed, so that the effect of improving the feeling during acceleration is obtained.

[Brief description of drawings]

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

FIG. 2 is a process flow chart showing control for making a vehicle acceleration determination in the present embodiment.

FIG. 3 is a process flow chart showing control for determining a traveling pattern of a vehicle in the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Engine 2 ... Turbocharger 3 ... Rotating electric machine 4 ... Battery 5 ... Controller 7 ... Vehicle speed sensor 13 ... Boost pressure sensor 14 ... Engine rotation sensor 21 ... Turbine

Claims (2)

[Claims] Claim: What is claimed is: 1. A turbocharger equipped with a rotating electric machine, comprising a rotating electric machine mounted on a turbine shaft of a turbocharger, and a turbocharger for energizing a turbine torque by electrically driving the rotating electric machine using a vehicle-mounted battery as a power source so as to increase supercharging pressure to the engine. A controller for a turbocharger with a rotating electric machine, wherein the turbocharger-equipped vehicle protects a battery by controlling the electric drive according to the frequency of starting and stopping of the vehicle equipped with the turbocharger. 2. The control device for a turbocharger with a rotating electric machine according to claim 1, wherein the acceleration feeling during traveling is improved when the frequency of starting and stopping of the vehicle is low.