JPH04261304A - Driver for vehicle - Google Patents

Abstract

PURPOSE:To simplify the structure by operating an induction motor, coupled with the flywheel of an engine to be mounted on a large vehicle, as a generator or a motor according to the traveling conditions thereby charging a battery and driving a vehicle. CONSTITUTION:A Diesel engine 4 is mounted on the body 3 of a large vehicle 1 and an induction machine 21 is driven through a flywheel 5. The induction machine 21 operates as a generator or a motor according to the traveling conditions and a battery (not shown) is charged during generator operation. At the time of starting or hill climbing, the induction machine 21 is operated as a motor with the output of the engine 4 or the battery thus driving the wheels 2. The wheels 2 are normally driven through the engine 4 and the battery is charged by bringing the induction machine 21 into generator-mode. The battery drives electric components, e.g. a compressor, lights, through a converter(not shown). According to the invention, engine size is limited, sub-engine is eliminated and the structure is simplified.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention electrically assists the driving force of large vehicles such as rail buses in running conditions that require a large driving force such as starting or climbing a hill, and in running conditions such as steady running. The present invention relates to a drive device that electrically operates various electrical components.

0002

2. Description of the Related Art Conventionally, a drive system for a vehicle such as a rail bus is constructed by connecting a diesel engine to transmit power to the wheels via a multi-stage transmission or final reduction gear. Further, the air compressor of the air brake device is connected to be operated by engine power. Furthermore, as bus vehicles become larger, the power consumption of electrical components such as interior lighting and air conditioners is increasing significantly, and for this reason, separate sub-engines are installed for generators for interior lighting and compressors for air conditioning. The power of this sub-engine is configured to drive a generator and a compressor, thereby suppressing a decrease in the power of the diesel engine and ensuring a predetermined running performance.

0003

[Problems to be Solved by the Invention] However, in the above-mentioned conventional drive system for vehicles such as rail buses, the power source for running is only a diesel engine, and the compressor of the air brake system uses this engine power. Since it is used, there is a limit to driving performance. Therefore, when a large amount of driving force is required, such as when starting a bus with many passengers or climbing a hill, the running performance inevitably deteriorates. Further, at this time, as the engine output increases, the amount of characteristic black smoke contained in the exhaust gas of the diesel engine also increases, which is not preferable in terms of exhaust gas purification measures. Furthermore, the air brake compressor is driven by engine power, and as power consumption increases, various electrical components are configured to be operated by the sub-engine, so these structures have become extremely complex, causing vibrations, noise, and noise. There is a problem that leads to high costs.

The present invention has been made in view of these problems, and its purpose is to equip the drive system of a large vehicle such as a rail bus with a retarder and its control device capable of generating electric power and electricity. The object of the present invention is to provide a vehicle drive device that can improve driving performance, exhaust gas purification, etc., and simplify the operating mechanisms of various electrical components.

[0005]

[Means for Solving the Problem] In order to achieve this object, the present invention has a flywheel of a drive system of an engine mounted on a vehicle body that operates as a generator under predetermined driving conditions to charge a battery. An induction machine of the retarder control device is provided which operates as an electric motor using battery power for auxiliary drive, and each motor that operates at least the indoor lighting equipment, the air brake compressor, and the air conditioner compressor is connected to the battery via a converter. is the main feature. When the vehicle starts running due to engine operation, the induction machine is operated as an electric motor to auxiliary drive the engine power, improving running performance such as starting. In addition, during steady driving, the induction motor operates as a generator, electrical energy is regenerated and the battery is actively charged, and this battery power is used for indoor lighting, air brakes, and air conditioners in addition to the above auxiliary drive. allows the compressor to operate.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a vehicle drive system according to the present invention, in which a rail bus 1 has a large vehicle body 3 having wheels 2.
A diesel engine 4 is installed at the rear of the vehicle. And the crankshaft 5 of this diesel engine 4
A flywheel 6 is connected to a transmission 9 via a clutch 7 and an input shaft 8, and an output shaft 10 of the transmission 9 is connected to the transmission 9 through a clutch 7 and an input shaft 8.
is connected to the wheels 2 via the differential device 11 and the axle 12.
It is configured to be connected to and transmit power.

[0007] Furthermore, the driving force of the wheels 2 may be further temporarily increased with respect to the output performance of the diesel engine 4, or
Electrical drive means are added to operate various electrical components. This electric drive device is an induction machine 21 that operates as a generator and a motor in a retarder control device 20 already proposed by the applicant. Then, this induction machine 21 is attached to the flywheel 6,
Electrical energy is regenerated under each driving condition, and the resulting battery power is used to auxiliary drive the wheels 2 and operate various electrical components.

FIG. 3 is a detailed configuration diagram showing the vehicle drive system and the like. First, the induction machine 21 of the retarder control device 20 mounted on the flywheel 6 of the drive system of the diesel engine 4 will be explained. The induction machine 21 includes a flywheel 6, a rotor side core, and a rotor part 21a consisting of a coil.
A stator portion 21b consisting of a core and a coil on the stator side is provided in the flywheel housing 6'. And these rotor part 21a and stator part 2
1b are arranged close to each other in the radial direction, and the rotor part 21
It is configured to operate as an electric motor by advancing the rotating magnetic field of the stator portion 21b with respect to a, and to operate as a generator by delaying it.

The induction machine 21 is connected to a battery 23 via an inverter circuit 22, and a charging circuit 24 and a discharging circuit 25 are connected to the circuit of the battery 23. In addition, in order to detect the operating state and driving conditions of the diesel engine 4, it has an engine rotation sensor 26 and an accelerator opening sensor 27, and signals of the engine rotation speed and accelerator opening of these sensors 26, 27 are used for starting and accelerating. It is input to the determination circuit 28. The start/acceleration determination circuit 28 determines start or acceleration when the rotation is low and the accelerator opening degree is large, and sets the electric mode. The electric mode signal is input to the discharge circuit 25 and set to apply the high voltage of the battery 23 to the induction machine 21, and further input to the drive torque setting circuit 29 to set a predetermined drive torque. This driving torque is, for example,
The characteristic is that the driving torque is large in the low rotation range, and this torque signal is input to the rotating magnetic field advancement circuit 30. The rotating magnetic field advancing circuit 30 generates a frequency signal of a rotating magnetic field that is advanced by a predetermined amount in accordance with the drive torque with respect to the engine rotational speed, and outputs this frequency signal to the inverter circuit 22 .

On the other hand, in running conditions other than starting and accelerating, the induction machine 21 regenerates a large amount of electrical energy and charges the battery 23 by itself, so a steady running judgment circuit 31 receives signals of engine rotation speed and accelerator opening. has. Steady running determination circuit 31 determines steady running when the rotation is relatively high and the change in accelerator opening is small, and sets the power generation mode. The power generation mode signal is input to the charging circuit 24 to enable charging of the battery 23, and is further input to the braking torque setting circuit 32 to determine the braking torque necessary to regenerate electrical energy. circuit 33
Enter. The rotating magnetic field delay circuit 33 is configured to generate a frequency signal of a rotating magnetic field delayed by a predetermined amount according to the braking torque with respect to the engine rotation speed, and output it to the inverter circuit 22 .

[0011] Furthermore, to explain the control system that operates various electrical components of the rail bus 1 using battery power, a DC-DC converter 34 is connected to a high voltage battery 23, and a DC-DC converter 34 is connected to a high voltage battery 23 to The voltage is converted into a voltage and connected from this converter 34 to a lighting fixture 35 in the room. In addition, compressor 1 for air brake and air conditioner
3 and 14 are configured to be driven by motors 36 and 37 , and the air brake motor 36 is always connected to the converter 34 . On the other hand, if the indoor air conditioner is also used for auxiliary driving such as starting, the battery 23 will be rapidly discharged, so the converter 34 is connected to the air conditioner motor 37 via the switch circuit 38.
is configured to be turned off by an electric mode signal.

Next, the operation of this embodiment will be explained. First, operate the diesel engine 4 and turn the clutch 7
By connecting the transmission 9 and shifting the transmission 9 to a predetermined gear, the engine power is shifted and transmitted to the left and right wheels 2 via the differential device 11, and this wheel power is used to move the heavy large rail bus 1. Run. At this time, each determination circuit 28, 31 of the retarder control device 20
In this example, the running status of rail bus 1 is determined.

[0013] Therefore, in the driving condition when starting or accelerating by depressing the accelerator, the determination circuit 28 determines the driving condition and outputs an electric mode signal. Then, a high voltage is applied from the battery 23 to the induction machine 21 by the discharge circuit 25, and at the same time, a frequency signal with a predetermined advance is input from the rotating magnetic field advance circuit 30 to the inverter circuit 22 according to the drive torque, and the stator of the induction machine 21 is A rotating magnetic field that advances relative to the rotor portion 21a is generated in the portion 21b. For this reason, the induction machine 21 temporarily operates as a powerful electric motor and provides auxiliary drive to the drive system of the diesel engine 4. In this way, the driving force of the wheels 2 is compared to that due to the engine torque shown by the solid line in FIG. , the low rotation range is particularly increased as shown by the broken line. Therefore, due to the characteristics of this wheel driving force, the running performance of the heavy rail bus 1 when starting and accelerating is improved when the capacity is exceeded, and the torque of the diesel engine 4 in this case is the same, so An increase in exhaust gas emissions is effectively prevented.

[0014] Furthermore, when the vehicle is running in a steady state with little depression of the accelerator, the determination circuit 31 determines this and outputs a power generation mode signal. Then, a frequency signal with a predetermined delay is transmitted from the rotating magnetic field delay circuit 33 to the inverter circuit 2 in accordance with the braking torque.
2, a rotating magnetic field is generated in the stator section 21b of the induction machine 21 that lags behind the rotor section 21a. Therefore, in this case, the induction machine 21 operates as a generator to generate electricity using the mechanical energy of the engine drive system, and this electric energy is converted into direct current by the inverter circuit 22, and the voltage is adjusted by the charging circuit 24 to charge the battery 23. be done.

On the other hand, as mentioned above, the high voltage of the battery 23, which is charged by regenerating energy while the rail bus 1 is running, is converted into various working voltages by the DC-DC converter 34, and is always used in the indoor lighting fixtures 35. and is supplied to the brake motor 36. For this reason, the interior is illuminated not only when driving but also when stopped, and the air brake compressor 13 is powered by the motor 36.
operates to create high-pressure air, which enables braking to be achieved by operating the brakes. Further, during the auxiliary drive such as when starting, the switch circuit 38 is temporarily turned off by the electric mode signal, and power supply to the air conditioner motor 37 is stopped. When the vehicle is running or stopped at other times, the switch circuit 38 is turned on and power is similarly supplied to the motor 37 from the converter 34, and the air conditioner compressor 14 is activated to cool and heat the room. By operating the air conditioner properly, over-discharge when using battery power is prevented. In this way, under most conditions while the large and heavy rail bus 1 is running, the induction machine 21 converts the mechanical energy of the drive system into electrical energy and actively charges the battery 23. Then, this battery power source is used to provide auxiliary drive and operate various electrical components, etc., which continues to be repeated.

Although the embodiments of the present invention have been described above, the present invention is not limited thereto.

[0017]

As explained above, the present invention provides a drive system for a vehicle with large and heavy objects, in which an induction machine of a retarder control device is provided in the engine drive system, and the induction machine is powered by battery power during starting and acceleration. Since the vehicle is controlled to operate as an electric motor and provide auxiliary drive, the driving performance of these vehicles can be improved. Further, at this time, since an increase in engine torque is suppressed, it becomes possible to reduce emissions of black smoke and the like from the exhaust gas of the diesel engine 4 in particular. Since the induction motor also operates as a generator during steady running, the battery can be charged by itself. The induction machine is automatically controlled to operate as an electric motor or generator depending on vehicle driving conditions, preventing over-discharging of the battery.
The effect of auxiliary drive can be obtained for a long period of time. Furthermore, indoor lighting, air brakes and air conditioner compressor operation,
Since it is configured to use battery power, a sub-engine is not required, and the structure etc. can be greatly simplified.

[Brief explanation of the drawing]

FIG. 1 is a side view of an embodiment of a vehicle drive device according to the invention.

FIG. 2 is a configuration diagram showing the same details.

FIG. 3 is a diagram showing the driving force characteristics of wheels.

[Explanation of symbols]

1. Rail bus 3 Vehicle body 4 Diesel engine 6 Flywheel 20 Retarder control device 21 Induction machine 34 DC-DC converter 35 Lighting equipment 36 Air brake motor 37 Air conditioner motor

Claims (3)

[Claims] [Claim 1] The flywheel of the drive system of an engine mounted on the body of a large, heavy object operates as a generator under predetermined driving conditions to charge a battery, and operates as an electric motor using battery power to provide auxiliary drive. 1. A drive system for a vehicle, characterized in that an induction machine of a retarder control device is provided, and each motor for operating at least an indoor lighting device, an air brake compressor, and an air conditioner compressor is connected to a battery via a converter. 2. The retarder control device applies battery voltage to the induction machine under running conditions such as starting and acceleration, and generates a rotating magnetic field that advances to the induction machine, and under steady running conditions, generates a rotating magnetic field that lags behind the induction machine. The vehicle drive device according to claim 1, characterized in that it is configured to charge a battery with the generated and generated electrical energy. 3. The vehicle drive system according to claim 1, wherein the air conditioner motor is controlled to temporarily stop supplying power when the vehicle is under running conditions such as starting or accelerating.