JPH06288245A - Control device of turbocharger with dynamo-electric machine - Google Patents

Abstract

PURPOSE:To increase the boost pressure but to control the increase of the fuel by driving electrically the dynamo-electric machine of a turbocharger, in order to reduce the generation of exhaust smoke in the starting or the acceleration of a diesel engine loading vehicle on a high land. CONSTITUTION:A solenoid valve 32 is provided on the way of a suction duct 13 from a suction pipe 12 to the boost compensator 31 of an injection pump 3 of a turbocharger 2 with a dynamo-electric machine connected to an engine 1, and in a starting or in an acceleration on a high land, the rotary electric appliance 20 is driven electrically so as to increase the boost pressure, but the pressure of the pressure air to the boost compensator 31 is suppressed by the control of the solenoid valve 32, so as to prevent an increase of the fuel flow from an injection pump 3.

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, which is intended to reduce smoke generation in a vehicle equipped with a diesel engine traveling in high altitudes by electrically driving a rotary electric machine mounted on the turbocharger.

[0002]

2. Description of the Related Art A rotary electric machine for electric / electric power generation is attached to a turbine shaft of a turbocharger for collecting exhaust energy and increasing intake pressure of the engine, and when the torque of the engine is increased, the rotary electric machine is electrically driven to perform pneumatic operation of the turbocharger. To boost the supercharging pressure, or to generate electricity when exhaust energy has a margin, and recover the energy as electric power.

The applicant of the present invention proposed a proposal to correct the boost pressure by electrically driving the rotating electric machine according to the detection signal of the atmospheric pressure when the vehicle equipped with the turbocharger with the rotating electric machine of this type runs in the highland. It is applied for in Japanese Patent Application No. 415850.

[0004]

On the other hand, in a vehicle equipped with a diesel engine, when traveling in a high altitude, there is a problem that smoke is generated in the exhaust gas when the vehicle starts or accelerates.

For this reason, it is conceivable that the turbocharger is electrically driven to urge the supercharging operation of the turbocharger to increase the intake pressure of the engine. In this case, the boost compensator increases as the supercharging pressure increases. The amount of fuel injected from the injection pump is increased by the operation of the above, and the smoke cannot be reduced. Also, in the control device that corrects the boost pressure by electrically driving the rotating electric machine according to the atmospheric pressure proposed in the above-mentioned patent application, There is an inconvenience that reduction measures are not considered.

The present invention has been made in view of such conventional problems, and an object thereof is to reduce the generation of exhaust smoke at the time of starting or accelerating a vehicle equipped with a diesel engine when traveling in a high altitude. It is to provide a control device for a turbocharger with a rotating electric machine.

[0007]

In order to achieve the above object, according to the present invention, exhaust gas at the time of starting and accelerating by electric drive of a rotary electric machine mounted on a turbocharger of a vehicle equipped with a diesel engine traveling in high altitudes. In a control device for a turbocharger with rotating electric machine that reduces smoke, a solenoid valve placed in the supercharging flow path to the boost compensator provided in the injection pump of the diesel engine and atmospheric pressure detection that detects the atmospheric pressure of the running place There is provided a control device for a turbocharger with a rotating electric machine, comprising: means for controlling electric drive of the rotating electric machine and control of opening and closing of an electromagnetic valve according to a signal from the atmospheric pressure detecting means and an operating state of an engine. To be done.

[0008]

[Operation] When starting or accelerating at high altitude, the rotary electric machine mounted on the turbocharger is electrically driven to increase the boost pressure, and the compressed air to the boost compensator provided on the injection pump is the duty of the solenoid valve provided on the way. There is no unnecessary fuel build-up that is weakened by the control, so only the air volume to the engine is increased.

[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. Reference numeral 1 in the drawing is a diesel engine (engine), and a turbocharger 2 is connected to an exhaust pipe 11 and an intake pipe 12 of the diesel engine. The turbocharger 2 is driven by exhaust energy of the engine 1 through the exhaust pipe 11. And a controller 22 that is driven by the torque of the turbine 21 to compress air, and the compressed air is passed through the intake pipe 12 to the engine 1
It is something that is pumped as supercharged air.

In the present embodiment, an intake duct 13 is provided from the middle of the intake pipe 12 that sends compressed air to the engine 1.
The intake air is guided to a boost compensator 31 attached to the fuel injection pump 3, and a solenoid valve 32 is arranged in the middle of the flow path of the intake duct 13 to turn it on / off.
Air having a pressure lower than that of the pressure air to the engine 1 is configured to reach the boost compensator 31 by the off duty control.

Reference numeral 20 denotes a rotating electric machine (TCG) which is electrically or electrically operated, and when electric power from the battery 4 is converted into AC electric power through the power unit 41 and is energized when the engine 1 is started or accelerated. The turbine is driven by power and assists the pneumatic operation of the compressor 22 to raise the supercharging air pressure to the engine 1. Further, when the engine 1 has medium speed and exhaust energy with a sufficient exhaust energy, the turbine is driven by the exhaust energy. The torque of 21 is recovered as electric power by the power generation operation of the rotary electric machine 20, and is used as charging power of the battery 4 via the rectifying device and the regulator mechanism of the power unit 41.

Reference numeral 5 denotes a controller composed of an electronic control unit, which is provided with a central control unit, various memories, input / output circuits and the like, and receives signals from the atmospheric pressure sensor 51, engine speed, engine load and the like. Then, predetermined calculation and processing are performed, and a control command is issued to the power unit 41 and the solenoid valve 32.

FIG. 2 is a process flow chart showing an example of the operation of this embodiment, and the operation of this embodiment will be described based on this figure.

First, in step 1, the signal from the atmospheric pressure sensor 51 is read and it is judged whether or not the vehicle is traveling in a highland. If the vehicle is in a highland, the procedure proceeds to step 2, but if the vehicle is not in a highland, the procedure proceeds to step 5, The rotating electric machine in the normal case is controlled.

In step 2, it is checked whether or not the rotating electric machine is driven based on the input signal or data. In the case of electric drive, in step 3, the electric power supplied to the rotating electric machine is increased as compared with the case of the level ground to energize. Then, the air pressure operation of the turbocharger 2 is urged to increase the boost pressure to the engine 1.

Next, in step 4, a control command is issued to the solenoid valve 32, the solenoid valve 1 is controlled to open by a duty-controlled signal as shown in FIG. 1 (A), and a pressure lower than the actual boost pressure is boosted by the boost compensator. Send to 31.
For this reason, the boost compensator 31 provided in the injection pump 3 does not increase unnecessary fuel, and only the boost pressure of the engine 1 increases to reduce smoke.

If the electric drive is not required in the above step 2, the process proceeds to step 6 and subsequent steps, and the electric drive and the solenoid valve 3 are operated.
The flow is repeated by returning to the first step 1 without performing the control of 2.

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

[0019]

According to the present invention as in the above embodiments,
A solenoid valve is installed in the middle of the intake duct to the boost compensator provided in the fuel injection pump, and the boost pressure to the boost compensator can be adjusted by its control, so when starting or accelerating at high altitudes, the electric drive of the rotating electric machine is driven. The boost pressure from the turbocharger is increased by and is supplied to the engine, but the pressure air to the boost compensator is kept low by controlling the solenoid valve to suppress unnecessary fuel increase, so the effect of reducing smoke in the exhaust gas can be achieved. can get.

[Brief description of 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.

FIG. 2 is a process flow chart showing an example of the operation of the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Engine 2 ... Turbocharger 3 ... Injection pump 4 ... Battery 5 ... Controller 20 ... Rotating electric machine 31 ... Boost compensator 32 ... Electromagnetic valve 41 ... Power part 51 ... Atmospheric pressure sensor

Claims (1)

[Claims] 1. A control device for a turbocharger with a rotating electric machine for reducing exhaust smoke at the time of starting and accelerating by electrically driving a rotating electric machine mounted on a turbocharger of a vehicle equipped with a diesel engine that travels in high altitudes. A solenoid valve arranged in the supercharging flow path to the boost compensator provided in the injection pump of the engine, an atmospheric pressure detecting means for detecting the atmospheric pressure of the traveling place, and a signal from the atmospheric pressure detecting means and an operating state of the engine A control device for a turbocharger with rotating electric machine, comprising: a control means for controlling electric drive of the rotating electric machine and opening / closing of a solenoid valve.