JPS59153946A - Method of controlling generated energy of generator in idling - Google Patents

Abstract

PURPOSE:To ensure safety of running by controlling an generator in idling of a Diesel vehicle such that the overcharge of a battery is prevented without decreasing power transmission to a load and further without unnecessary consumption of fuel. CONSTITUTION:When, in idling, parallel power transmission to an electric load 2 is carried out from both a battery 4 and a generator 1 and further discharge current from the battery 4 detected by a resistance 6 is larger than the a set value of the upper limit set in a current setter 13, a first signal to operate an electromagnetic valve driving section 13 for turning OFF a solenoid valve 14 and turning ON a solenoid valve 15 is generated to an output port 12. Thus, oil pressure in an oil gallery 17 is applied to a cylinder 18 through the solenoid valve 15 to increase injection amount from a fuel injection pump 21 and generated energy of the generator 1 so that the discharge current from the battery 4 is reduced. When the discharge current falls within the set range, a second signal to turn ON the solenoid valves 14, 15 is generated to leave the discharge current within the set range. When the discharge current is smaller than the lower limit value, a third signal output increases the discharge.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for controlling power generation of a generator during idling, and in particular to an method for stabilizing battery consumption by adjusting the load sharing of the generator according to the load condition of the battery. This relates to a method for controlling the amount of power generated by a generator during drinking.

[Technical background of the invention]

Conventionally, in a diesel vehicle, the amount of power generated by a generator during idling is generally set to generate approximately 60% of the vehicle's maximum power consumption. In normal idling conditions, the above amount of power generation is sufficient, but for example, in the following conditions: ■ During nighttime traffic jams or when driving at low speeds.

■ When working using the lights of a stopped vehicle, the above power generation amount is insufficient, and the shortfall has been supplied from the battery.

[Problems with background technology]

However, if the above-mentioned state continues for a long time, the amount of power consumed by the battery becomes large and the battery becomes over-discharged.

In such a state, stop the engine and 1. If the engine is subsequently restarted, the battery's discharging capacity will be reduced, making it difficult or impossible to start the engine. Especially when the engine is cold, the required driving force for the starting motor increases due to factors such as increased viscosity of engine oil.
This trend is becoming more pronounced. Therefore, a battery backup is essential during idle linking, and countermeasures have been requested.

[Purpose of the invention]

The present invention was made in view of the above circumstances, and its purpose is to prevent over-discharge of the battery without reducing power transmission to the load, eliminate unnecessary consumption of fuel, and thereby smoothly operate the engine. An object of the present invention is to provide a method for controlling the amount of power generated by a generator during idle linking so that it can be started.

[Summary of the invention]

According to the present invention, the above object is achieved as follows. In other words, during idling of a diesel engine that transmits power in parallel to a load from both the battery and a generator driven by the engine, the load status of the battery, such as the discharge current of the battery, is detected and the detected value is within the set range. By adjusting the engine rotation speed and controlling the amount of power generated by the generator when the battery exceeds the limit, the load sharing between the generator and the battery is adjusted to prevent the battery from becoming over-discharged.

[Embodiments of the invention]

A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

The figure is a schematic explanatory diagram showing an example of an apparatus for explaining the method of the present invention.

As shown in FIG. 1, a generator 1 is connected to an electric load 2 through a line 3, and transmits electric power generated by driving an engine to the electric load 2.

The line 3 and the battery 4 are connected by a wiring 5 so that power is transmitted in parallel from the battery 4 to the electric load 2 during idle linking. A resistor 6 is interposed in the wiring 5 to produce a voltage drop proportional to the current flowing through the wiring 5, so that the discharge current of the battery 4 can be detected based on the voltage drop across the resistor 6. Note that 7 is a starter motor connected to the battery 4 and driven by the battery 4.

As shown in FIG. 2, the output signal of the resistor 6 is amplified by the amplifier 7, and is input to the AND circuit 9 together with the output signal of the delay device 8. The output signal of the AND circuit 9 is compared with the output signal of the current setting device 10 by a comparator 11, and the comparison result is outputted to the output port 12. The current setting device 10 is preset with an upper limit setting value and a film forming constant value, and the comparator 11 determines whether the comparison input is larger than the upper limit setting value.
Three types of output are output depending on whether the output is smaller than the lower limit setting value or within the setting range between the upper limit setting value and the lower limit setting value. The output of the output port 12 is input to the delay device 8 and fed back to stabilize the comparison in the comparator 11.

The electromagnetic valve drive unit 13 drives two electromagnetic valves 14 and 15, and is connected to the output port 12. Each of the solenoid valves 14 and 15 is interposed in an oil supply/discharge pipe 16, and when one of the solenoid valves 14 is driven, oil is sucked from the oil gear rally 17 into the actuator, for example, from one end of the cylinder 18, and Oil pan 19 from the other end
The piston rod 20IC of the cylinder 18 is discharged to apply a unidirectional driving force to the piston rod 20IC. Furthermore, when the other solenoid valve 15 is driven, oil is sucked into the other end of the cylinder 18 and discharged from one end, thereby applying a driving force in the opposite direction to the piston rod 20 of the cylinder 18. There is. Piston rod 2 driven in both directions in this way
0 is connected to a throttle lever 22 of a fuel injection pump 21, and is configured so that the throttle lever 22 is interlocked with a piston rod 20 so that the amount of fuel injection can be increased or decreased by moving the piston rod 20.

Next, the operation of the device having the above configuration will be explained.

In Figure 1, during idle linking, power is transmitted in parallel from both battery 4 and generator 1 to electric load 2, but resistor 6
The discharge current from battery 4 detected by current setting device 1
If it is larger than the upper limit set value set by 0, the solenoid valve drive unit 13 is operated at the output port 12 to
A first signal is output which turns off the solenoid valve 4 and turns on the other solenoid valve 15. When this first signal is output, the oil pressure of the oil gear rally 17 is applied to the cylinder 18 via the other solenoid valve 15, and the piston rod 20 moves the throttle lever 22 against the throttle lever return spring 23 to the fuel increasing side. make it work. Therefore, the fuel injection pump 21
The amount of fuel injected from the engine increases and the engine speed increases. This increase in engine speed increases the amount of power generated by the generator 1, so the load sharing on the generator 1 side increases and the discharge current from the battery 4 decreases. The effect of increasing the fuel injection amount to increase the engine speed continues until the discharge current from the battery 4 falls within the set range.

When the discharge current of battery 4 falls within the set range,
A second signal is output to the output port 12 that turns on both electromagnetic valves 14 and 15. When this second signal is output, the piston rod 20 becomes stationary because the oil pressure from the oil gear rally 17 is applied to the cylinder 18 via the one solenoid valve 14 and the other solenoid valve 15.
This stopping also causes the throttle lever 22 to stop, so that the engine speed is maintained at a speed determined by the position of the piston rod 20. Therefore, generator 1
Since the amount of power generated does not change, the load sharing between the battery 4 and the generator 1 also remains unchanged, and the discharge current of the battery 4 remains within the set range.

When the discharge current of the battery 4 is smaller than the lower limit set value set by the current setting device 10, the solenoid valve drive unit 13 is operated at the output port 12 to turn on one solenoid valve 14 and turn off the other solenoid valve 15. A third signal is output. When this third signal is output, the oil pressure of the oil gear rally 17 is applied to the cylinder 18 via one of the solenoid valves 14, and the piston rod 20 moves the throttle lever 22 to reduce the fuel consumption by the restoring force of the throttle lever return spring 23. Make it work on the side. Therefore, the amount of fuel injected from the fuel injection pump 21 decreases, and the engine speed decreases. Since the amount of power generated by the generator 1 decreases due to the decrease in the engine speed, the batch')-4 side O load sharing increases, and the discharge current from the battery 4 increases. This increase continues until the discharge current falls within the set range.

In this way, since the battery discharge current is monitored and the engine idle speed is controlled, the battery discharge current can always be maintained within the set range. As a result, it is possible to prevent over-discharge of the battery, and especially in cases where load sharing is largely biased towards the generator 1 side, this can be corrected and unnecessary consumption of fuel can be eliminated.

In addition, in the second embodiment, by setting a lower limit value for the engine speed, it is possible to eliminate problems such as engine stoppage due to excessively lowering the engine speed. Also,
In the above embodiment, the load state of the battery 4 is detected by the resistor 6.
In addition to this current detection, the battery voltage is also detected, the battery power consumption is determined from these currents and voltages, and the idle link rotation speed is adjusted from the determined power consumption. It is also possible to control the amount of power generated. Furthermore, the cylinder 18 can increase or decrease the fuel injection amount.
Although the actuator is driven, it is not limited to the / cylinder 18, and in short, various changes and modifications can be made to any actuator that can control the fuel injection pump 21.

〔Effect of the invention〕

In summary, the present invention exhibits the following excellent effects.

(1) The load status of the battery is detected and the amount of power generated by the generator is controlled based on this detected value to optimize the load sharing between the generator and the battery, so the battery is Overdischarge can be prevented. This prevents the battery from running out of capacity, making it possible to start the engine more smoothly, ensuring driving safety, and extending the life of the battery.

(2) Since the battery load state is detected by the battery power consumption or battery discharge current, which is easy to control, accurate control is possible.

(3) Since the battery discharge current is detected by a resistor, detection is extremely easy and costs can be reduced.

(4) Fluctuations in battery load conditions can be suppressed, while
Since the reduction in the load sharing of the battery is compensated for by the generator, the total amount of power transmitted to the load does not decrease and there is no problem with the electrical system. In addition, if the load on the generator side is too large, the generator side will bear the burden, so fuel can be used more effectively.

[Brief explanation of the drawing]

FIG. 1 is an electrical wiring diagram showing an example of battery load state detection means for implementing the present invention, and FIG. 2 is a connection diagram showing an example of a device for implementing the control method of the present invention. In addition, 1 is a generator, 2 is a load, 3 is a line, 4 is a battery, 5 is wiring, 6 is a resistor, 18 is a cylinder which is an example of one actuator, and 21 is a fuel injection pump. Patent Applicant: Isuzo Jidosha Co., Ltd. Patent Applicant: Fuji Electric Manufacturing Co., Ltd. Representative Patent Attorney Nobuo Kinutani Figure 2

Claims (4)

[Claims] (1) During idling of a diesel engine that transmits power in parallel to the load from both the battery and a generator driven by the engine, the load condition of the battery is detected, and when the detected value exceeds the set range, the engine revs. A method for controlling the amount of power generated by a generator during idle linking, characterized in that the load sharing between the generator and the battery is adjusted by adjusting the amount of power generated by the generator by adjusting the amount of power generated by the generator. (2) The method for controlling the amount of power generated by a generator during idle link according to claim 1, wherein the load condition of the battery is detected from the battery power consumption or the battery discharge current. (3) A resistor is interposed in the wiring that connects the battery to the line connecting the generator and the load, and the discharge current of the battery described in I is detected from the voltage drop that occurs in this resistor. A method for controlling power generation of a generator during idle link according to claim 2. (4) Set the above setting range as an area between the upper limit and the lower limit, and change the amount of current generated by the generator so that it increases when the detected value exceeds the upper limit and decreases when the detected value falls below the lower limit. Claims 1 and 2 are characterized in that
3. A method for controlling power generation of a generator during idle link according to item 1 or 3.