JPH02245434A - Control device for internal combustion-electric vehicle - Google Patents

Abstract

PURPOSE:To ensure an optimum combustion condition at all times in an electric vehicle of electric propulsion type having an internal combustion engine as a prime mover by detecting the clogging of an air filter, and setting up the load condition of the internal combustion engine on the basis of the detected result and an output instruction value to the internal combustion engine. CONSTITUTION:In a diesel-electric locomotive engine, the predetermined output instruction sent from an engine output instruction means 4 via a driver's notch operation is transmitted to the electromagnetic solenoid of a governor 5, thereby maintaining the speed of a diesel engine 1 at the predetermined value. In this case, there are provided a clogging detecting means 6 for detecting the clogging of an intake filter fitted to the intake device 2 of the diesel engine 1, and an output instruction detecting means 7 for detecting the status of an instruction value from an engine output instruction means 4. Furthermore, when output signals are transmitted from each of the means 6 and 7, the predetermined output set value is generated from a condition setting means 8 and fed to an adding value 10, thereby causing deduction from an output set value determined with a generator output set value 9.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electric propulsion type electric vehicle using an internal combustion engine as a prime mover, and particularly to a control device for an internal combustion electric vehicle suitable for a diesel electric locomotive.

[Prior art] In internal combustion electric vehicles such as diesel electric locomotives,
Traditionally, the general configuration has been to set an upper limit on the output of an internal combustion engine according to an operating command, and to control the governor of the internal combustion engine so that this upper limit output is obtained. It is known, for example, from Japanese Unexamined Patent Publication No. 55-43965, to set the following as conditions to be taken into consideration in control.

By the way, in such internal combustion electric vehicles, it is almost indispensable to equip the internal combustion engine that is the prime mover with an air intake filter, but as a matter of course, this air intake filter inevitably gets clogged. As a result, an increase in intake resistance is inevitable as the operation continues.

Therefore, in the prior art, the progress of clogging of the air supply filter has been dealt with by performing predetermined maintenance.

[Problem to be Solved by the Invention] In the above-mentioned conventional technology, clogging of the air supply filter is only dealt with by carrying out a predetermined air supply filter cleaning operation during maintenance, and during that time, the air supply filter is cleaned. No particular consideration has been given to the increase in intake resistance caused by this, and as a result, the increase in intake resistance is significant, especially when maintenance is insufficient, and the intake air amount of the internal combustion engine decreases, causing the output to drop to the specified value. Even though this has not been achieved, the output control for the internal combustion engine and the output control of the generator driven by this internal combustion engine are maintained as normal, and as a result, in the conventional technology,
There has been a problem in that it is not possible to maintain optimal operating conditions for the internal combustion engine, resulting in failure of one engine or loss of efficiency.

Regarding this maintenance, although efforts are made to ensure that it is handled as appropriately as possible in the vehicle instruction manual, etc., the reality is that sufficient maintenance cannot always be expected, and for this reason, the above-mentioned The problems of the prior art tended to become even more severe.

An object of the present invention is to provide a control device for an internal combustion electric vehicle that can sufficiently deal with clogging of an air supply filter and that can always ensure high reliability despite poor maintenance. There is a particular thing.

[Means for Solving the Problem] The above object is to provide a means for detecting clogging of the air supply filter, and to determine whether the load condition of the internal combustion engine is determined based on both the detection result of the detection means and the output command value for the internal combustion engine. Achieved as set.

[Function] Since the load condition of the internal combustion engine is set by both the clogging state of the air supply filter and the output command value for the internal combustion engine, the clogging state of the air supply filter will change regardless of the output command value at that time. Since the output of the internal combustion engine can be controlled in accordance with the internal combustion engine and the internal combustion engine is not operated under unfavorable operating conditions, sufficient reliability can be easily ensured.

[Example] The following is a control device for an internal combustion electric vehicle according to the present invention.
This will be explained in detail with reference to the illustrated embodiment.

Fig. 1 shows an embodiment in which the present invention is applied to a diesel electric locomotive. 3 is the main generator.

4 is an engine output command means, and 5 is a governor that controls the rotational speed of the diesel engine 1. When the driver operates a notch, a predetermined output command is sent from the engine output command means 4 to the electromagnetic controller 5. The signal is transmitted to the solenoid, thereby controlling the rotational speed of the diesel engine 1 to be maintained at a predetermined value.

Reference numeral 6 denotes a clogging detection means for the air supply filter, which is equipped with a detector for detecting the negative air supply pressure of the engine 1, and outputs the detected value and a preset table to the output given from the engine output command means 4. It compares the reference value obtained by searching with the command value, and if the difference between the detected value and this reference value exceeds a predetermined value, it is determined that the air supply filter is clogged, and a predetermined clogging signal is sent. It functions to generate.

7 is an output command value detection means for detecting the state of the command value from the engine output command means 4, and 8 is a condition setting means, which detects the clogging signal from the clogging detection means 6 and the output command value. The command value from the means 7 is input, and it functions to generate a predetermined output setting value in accordance with these inputs.

9 is a generator output setter, and 10 is an adder, which functions to subtract the output set value set by the 1-condition setting means 8 from the output set value set by the generator output setter 9.

11 is a comparator, 12 is an amplifier, 13 is a field controller, and 14 is a multiplier. and output these deviations. This deviation is then supplied to the field controller 13 via the amplifier 12 to control the excitation of the generator 3 and control the generator output. Note that the multiplier 14 multiplies the output voltage and output current of the generator 3 to detect the output.

Reference numeral 15 denotes a display device, which functions to display the clogging status of the air supply filter. Note that the details will be described later.

Next, the operation of this embodiment will be explained.

First, Figure 2 shows the clogged condition of the air supply filter.

The relationship between the output P and the air supply amount V of the diesel engine 1 is shown in the first quadrant, and the second quadrant is the command signal value given from the engine output command means 4. N (represented by the notch on the main controller) and engine output P, and the fourth quadrant is the supply air pressure (pressure in the intake pipe after passing through the intake air filter, intake negative pressure) H and intake air volume ■, respectively. represents the relationship between

In this Figure 2, when the air supply filter is not clogged and is in a clean state and the engine is being operated at the output command value of notch N1, the air supply negative pressure is Hl, and the air supply amount is vl.
shall be. Assume that the engine output P1 at this time has been obtained.

In this case, the engine output P1 is generated in response to the output command value of notch N1, and the air supply amount of the diesel engine 1 at this time is vl. The rotational speed of the engine 1 corresponding to this engine output P1 is n
Let it be l.

Next, the air supply filter becomes clogged, and as a result,
Assume that the air supply negative pressure H2 now corresponds to the air supply amount v2.

Then, as a result, the engine output P becomes P2 corresponding to the intake air amount v2, and the rotational speed decreases to n2.

However, at this time, if the engine is being operated with the 8-force command value still at notch N1, the governor 5 changes the rotational speed of the diesel engine 1 to the rotational speed corresponding to this output P1 according to this command value. In order to maintain the speed n1, the fuel supply amount is increased, and as a result, an excessive amount of fuel is supplied relative to the decreased air supply amount v2, and the operating state is no longer optimal.
This will cause problems such as a decrease in efficiency.

However, in the embodiment shown in FIG. 1, when the above-mentioned air supply filter becomes clogged, the clogging detection means 6 generates a clogging signal, which is compared with the output command value by the condition setting means 8. , when the influence of the clogging of the supply air filter appears on the command value of notch N1, a predetermined output setting value is generated, which is supplied to the adder 10 and set by the generator output setting device 9. The output setting value is subtracted from the specified output setting value.

As a result, the excitation of the main generator 3 is weakened, its output is reduced, and the absorbed power is reduced, so the load on the diesel engine 1 is reduced, and the output that must be generated is reduced to P2 in Figure 2. , so that
The rotational speed n2 can be returned to the rotational speed n1 corresponding to the notch N1.

As a result, the control by the speed governor 5 returns to the rotational speed n corresponding to the output command value of the notch N1, so the fuel supply amount falls within the value corresponding to the output P2 of the diesel engine 1 at this time, and is adjusted to an appropriate level. Operation control can be maintained.

On the other hand, even when the supply air amount v2 comes to correspond to the supply air negative pressure H2 in FIG. 2 due to clogging of the supply air filter, if the output command value is at the notch N2 at this time, There is no problem if you leave it as is, so at this time,
In the condition setting means 8, the output setting value is set to zero by comparing the clogging signal from the clogging detection means 6 and the signal of the notch N2 from the output command value detection means 7, and therefore,
At this time, the excitation of the main generator 3 is controlled using the output setting value set by the generator output setting device 9.

Therefore, according to this embodiment, when the air supply filter becomes clogged, the maximum output that the diesel engine 1 can generate is limited from the rated output, and the notch at this time exceeds this maximum output. Even at this time, the load on the diesel engine 1 is limited by the excitation control of the main generator 3 depending on the clogging state of the air supply filter.
Appropriate control can always be obtained, problems such as excessive fuel supply to the diesel engine 1 are eliminated, deterioration of fuel consumption and efficiency are eliminated, and adverse effects on the engine due to incomplete combustion are suppressed. High reliability can be maintained by reducing the probability of failure occurrence.

Next, details of the display device 15 will be explained with reference to FIG.

In FIG. 3, 151 is an arithmetic processing unit, 152 is a storage unit, and as shown in FIG.
An input buffer 153 stores the relationship between Hr and the remaining usage time of the air supply filter as a table, and serves to receive and absorb the output of the main generator 3 and the amount of clogging of the air supply filter.

Note that, at this time, the generator output is converted to a frequency f and held.

154 is an output buffer that holds output data, and 155 is a display device.

The arithmetic processing unit 151 stores the generator output and the amount of clogging of the air supply filter taken in from the input buffer 153 in the storage unit 15.
Process according to the table in 2.

This calculates the time until the air supply filter becomes unusable due to clogging, that is, the remaining usage time.

This remaining usage time is then supplied from the output buffer 154 to the display 155 for display.

Therefore, according to this embodiment, in addition to the above-mentioned control,
It is possible to know when to perform maintenance such as cleaning the air supply filter, and it is easy to ensure sufficient reliability through appropriate maintenance.

FIG. 5 shows another embodiment of the present invention, and this embodiment is the first embodiment.
The difference from the embodiment shown in the figure is that when the amount of clogging of the air supply filter reaches a predetermined value, instead of controlling the excitation of the main generator 3 to suppress the output, in this case, the regulating The point is that the set rotational speed of the machine S is changed, thereby dealing with clogging of the air supply filter.

In FIG. 5, 16 is an output limiting means, 17 is a command switching means, and the other configurations are the same as the embodiment shown in FIG.

The output limiting means 16 receives the clogging signal from the clogging detecting means 6 and the command value from the output command value detecting means 7, and functions to generate a predetermined output limiting value in accordance with these inputs.

The command switching means 17 is comprised of, for example, an electronic switch circuit or a minimum value selection circuit, and selects the smaller of the output command value given from the engine output command means 4 and the output limit value from the high force limiting means 16. It functions to output the signal.

Therefore, according to this embodiment, the output of the diesel engine 1 is limited depending on the degree of clogging of the air supply filter. Similarly, it is possible to always obtain appropriate control, eliminate inconveniences such as excessive fuel supply to the diesel engine 1, and eliminate deterioration of fuel efficiency and decrease in efficiency.
Since the adverse effects on the engine due to incomplete combustion are suppressed, high reliability can be maintained by reducing the probability of failure occurrence.

By the way, in the above embodiment, only the influence on the control of the internal combustion engine due to clogging of the air intake filter was focused, but in addition to this, there are other factors that may affect the output of the internal combustion engine. There is a supply air temperature.

FIG. 6 shows an embodiment of the present invention in which this supply air temperature is incorporated as a factor for controlling the engine.

In the embodiment shown in FIG. 6, reference numeral 18 is a supply air temperature detection means, and the other components are the same as the embodiment shown in FIG.

The supply air temperature detection means 18 detects the temperature of the air that passes through the supply air filter of the air supply device 2 and is supplied to the intake pipe of the diesel engine 1, and supplies the detected value to the condition setting means 8.

Therefore, in this embodiment, when the supply air temperature of the diesel engine 1 exceeds a predetermined value, the main generator 3 is energized by the amount exceeding the predetermined value, and its output is The maximum value will be limited, and if the output command value by the driver's notch exceeds this maximum value, it will be controlled to the maximum value at that time, so as shown in Figure 1. As in the case of the embodiment, inappropriate control is caused by the rotation speed control by the speed governor 5 taking precedence even though the supply air temperature has increased and the diesel engine 1 is no longer able to produce its rated output. However, this can be suppressed, and a decrease in fuel efficiency and reliability can be sufficiently eliminated.

Note that the embodiment shown in FIG. 6 and the embodiment shown in FIG. 1 or 5 may be combined and implemented.

In other words, both the degree of clogging of the intake air filter and the intake air temperature are factors in the output limit control of the diesel engine 1.

According to this embodiment, even more perfect control is possible,
Greater efficiency improvement and sufficient reliability can be obtained.

[Effects of the Invention] According to the present invention, the output of the engine can be limited by the output command according to the air supply conditions of an internal combustion engine such as a diesel engine, so the engine can always be kept in an optimal combustion state. The occurrence of abnormalities in the engine due to engine sagging, reduction in fuel efficiency, and incomplete combustion can be suppressed, and the operating rate of the vehicle can be sufficiently improved due to improved reliability.

Furthermore, as a result, more time is provided for maintenance of the air supply filter, so that it is possible to further improve the operating rate of the vehicle.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the control device for an internal combustion electric vehicle according to the present invention, Fig. 2 is a characteristic diagram for explaining operation, Fig. 3 is a detailed block diagram of the display device, and Fig. 4 is the display characteristics. 5 and 6 are block diagrams showing other embodiments of the present invention, respectively. DESCRIPTION OF SYMBOLS 1... Diesel engine, 2... Air supply device, 3... Main generator, 4... Engine output command means, 5...... Governor, 6...
... Clogging detection means, 7 ... Output command value detection means, 8 ... Condition setting means, 9 ....
Generator output setting device, 10... Adder, 11...
...Comparator, 12...Amplifier, 13...
...Field controller, 14... Multiplier, 15...
...Display device. Figure 6: Eye-lucky meeting half-death 7: Eka finger +ll] L inspection 1ll J hand punch I5: & support device Figure 3 Figure 4 Figure Kuima EkaP Figure

Claims (1)

[Claims] 1. In an internal combustion electric vehicle that controls the upper limit of the output of an internal combustion engine according to an output command value, the degree of clogging of an air intake filter that filters intake air of the internal combustion engine is detected. A clogging detection means and a calculation means for comparing the output of the clogging detection means with the output command value and correcting the output command value are provided, and the load condition of the internal combustion engine is set based on the output of the calculation means. A control device for an internal combustion electric vehicle, characterized in that it is configured to. 2. Control of an internal combustion electric vehicle according to claim 1, wherein the setting of the load condition of the internal combustion engine is configured by a control means for setting the output of a generator driven by the internal combustion engine. Device. 3. The control device for an internal combustion electric vehicle according to claim 1, wherein the setting of the load condition of the internal combustion engine is constituted by a control means for setting the output of the internal combustion engine. 4. In the invention of claim 1, the clogging detection means determines clogging of the intake air filter when the relationship between the intake negative pressure of the internal combustion engine and the output command value reaches a predetermined state. A control device for an internal combustion electric vehicle, characterized in that: 5. In the invention of claim 1, the clogging detection means is configured to determine clogging of the intake air filter when the relationship between the intake flow rate of the internal combustion engine and the output command value reaches a predetermined state. A control device for an internal combustion electric vehicle, characterized in that: 6. The internal combustion electric vehicle according to claim 1, further comprising monitor means for displaying the output of the clogging detection means, so that the clogging state of the air supply filter is displayed. control device. 7. In the invention of claim 1, temperature detection means for detecting at least one of the intake air temperature and the cooling water temperature of the internal combustion engine is provided, and the setting of the load condition of the internal combustion engine is based on the output of the calculation means and the temperature detection. 1. A control device for an internal combustion electric vehicle, characterized in that the control device is configured to perform the control according to both of the detection results of the means.