JP2007209111A - Control unit for vehicular generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control unit for vehicular generator capable of restraining problems from occurring according to variations in voltage or power generating torque, when a transmission is frequently shifted down in a vehicle deceleration state. <P>SOLUTION: The voltage control device 35 controls an output voltage of a generator 11 as a first voltage for expediting charging of a battery 10 when the vehicle deceleration state is detected by a deceleration state detecting device 31, controls the output voltage of the generator 11 as a second voltage smaller than the first voltage and for restraining charging of the battery 10 when a non-deceleration state of the vehicle is detected, and as the second voltage even when the deceleration state of the vehicle is detected when a clutch disengagement state is detected by a clutch switch 23. The voltage control device 35 controls the output voltage of the generator 11 as the first voltage, even when the vehicle deceleration state is detected and the clutch disengagement state is detected when frequency of transmission's shift-down is at and more than a prescribed frequency, which is stored in a storage device 33, while the vehicle is under the deceleration state. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a control device for a vehicular generator.

Conventionally, a control device for a vehicular generator is known (for example, Patent Document 1). This control device increases the power generation amount of the generator when the vehicle is in a decelerating state and decreases it when the vehicle is in an accelerating state. Thereby, the fuel consumption improvement of the vehicle is aimed at.
Japanese Utility Model Publication No.57-192739

  By the way, when the control device is applied to a vehicle equipped with a manual transmission, an increase in the amount of power generation when the vehicle is in a deceleration state is generally performed when the transmission is in a gear-in state. Yes. Therefore, if the transmission is frequently shifted down while the vehicle is decelerating (that is, the clutch is disengaged all the time), the amount of power generation increases and decreases each time, and adverse effects caused by fluctuations in voltage and power generation torque (for example, Lamp flicker associated with voltage fluctuations, NVH deterioration associated with fluctuations in power generation torque, and the like).

  The present invention has been made in view of the above points, and the object of the present invention is to prevent adverse effects caused by fluctuations in voltage and power generation torque when the transmission is frequently shifted down while the vehicle is decelerating. An object of the present invention is to provide a control device for a vehicular generator that suppresses the occurrence.

  According to a first aspect of the present invention, there is provided a battery for supplying electric power to an electric load of a vehicle on which a manual transmission is mounted, an electric power supplied to the electric load driven by the engine of the vehicle, and electric power to the battery. A generator that charges the vehicle, a deceleration state detection unit that detects a deceleration state of the vehicle, an intermittent state detection unit that detects an intermittent state of a clutch that enables transmission of power of the engine to the transmission, and the power generation When the vehicle deceleration state is detected by the deceleration state detection means, the output voltage of the machine is set to the first voltage for promoting the charging of the battery, and the vehicle non-deceleration state is detected by the deceleration state detection means. The second voltage for suppressing charging of the battery is smaller than the first voltage, and when the disengaged state detecting means detects the disengaged state of the clutch, A control device for a vehicular generator comprising voltage control means for setting the second voltage even when a deceleration state of the vehicle is detected by a speed state detecting means, wherein a parameter value related to a gear stage of the transmission is obtained. Parameter value detection means for detecting, and calculation means for calculating the frequency at which the transmission is shifted down in the deceleration state of the vehicle based on the detection results of the deceleration state detection means and the parameter value detection means, When the frequency calculated by the calculation means is equal to or higher than a predetermined frequency, the voltage control means detects the deceleration state of the vehicle by the deceleration state detection means and detects the disengagement state of the clutch by the intermittent state detection means. However, the output voltage of the generator is configured to be the first voltage.

  As a result, when the frequency of the transmission being shifted down when the vehicle is in a decelerating state calculated by the calculating unit is equal to or higher than a predetermined frequency, the decelerating state detecting unit detects the vehicle decelerating state and the intermittent state detecting unit detects Even if the clutch disengagement state is detected, the voltage control means continues the output voltage of the generator to the first voltage for promoting the charging of the battery, so that the transmission is shifted down when the vehicle is decelerating. When the transmission frequency is relatively high, the output voltage of the generator does not increase or decrease even if the transmission is shifted down while the vehicle is decelerating. For this reason, it is possible to suppress the occurrence of adverse effects caused by fluctuations in voltage and power generation torque.

  In addition, when the vehicle is decelerated and the transmission is shifted down more than a predetermined frequency, the generator output voltage is maintained even if the vehicle decelerating state is detected and the clutch disengaged state is detected. Thus, since the first voltage for promoting the charging of the battery is used, the amount of charge of the battery can be increased.

  In a second aspect based on the first aspect, when the deceleration state of the vehicle is detected by the deceleration state detection means and the disengagement state of the clutch is detected by the intermittent state detection means, the disengagement state is maintained. The voltage control means is configured to count the time calculated by the calculating means when the time measured by the time measuring means reaches a predetermined time or more. Also, the output voltage of the generator is configured to be the second voltage.

  Thereby, when the time during which the clutch disengaged state is kept for a predetermined time or more, which is timed by the time measuring means, is calculated by the calculating means, the frequency at which the transmission is shifted down while the vehicle is decelerating. Even when the frequency is equal to or higher than the predetermined frequency, the load of the engine can be reduced because the output voltage of the generator is set to the second voltage for suppressing the charging of the battery, which is smaller than the first voltage. Therefore, it is possible to suppress the occurrence of engine stall.

  According to a third aspect of the present invention, in the second aspect of the present invention, the apparatus further comprises a rotational speed detecting means for detecting the rotational speed of the engine, and the predetermined time is determined when the disengaged state detecting means detects the clutch disengaged state. The longer the engine rotational speed detected by the rotational speed detecting means, the longer the engine speed.

  As a result, the predetermined time is increased as the rotational speed of the engine detected by the rotational speed detecting means when the clutch disengaged state is detected by the intermittent state detecting means is increased. The longer the speed is, the longer the duration of the generator output voltage is maintained as the first voltage. Therefore, the amount of charge of the battery increases as the engine speed increases with the clutch disengaged.

  According to the present invention, when the frequency at which the transmission is shifted down is equal to or higher than the predetermined frequency when the vehicle is decelerating, the output of the generator is detected even if the vehicle decelerating state is detected and the clutch disengaged state is detected. The voltage is maintained as the first voltage for promoting battery charging. That is, when the frequency of the transmission being shifted down is relatively high while the vehicle is decelerating, the output voltage of the generator does not increase or decrease even if the transmission is shifted down while the vehicle is decelerating. For this reason, it is possible to suppress the occurrence of adverse effects caused by fluctuations in voltage and power generation torque. In addition, the amount of charge of the battery can be increased.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic configuration diagram of a control device for a vehicle generator, and FIG. 2 is a flowchart showing control of the control device for the vehicle generator.

  A vehicle equipped with a control device for a vehicle generator according to an embodiment of the present invention includes a manual transmission (hereinafter referred to as a transmission). As shown in FIG. 1, the vehicle generator control device 1 includes a battery 10, a generator 11, various sensors 20 to 23, and an electronic control unit (hereinafter referred to as ECU) 30. The battery 10 supplies power to the electric load 12 of the vehicle. The generator 11 is driven by a vehicle engine (not shown) to supply electric power to the electric load 12 and supply electric power to the battery 10 for charging.

  The various sensors 20 to 23 include an engine rotation speed detection sensor 20 (corresponding to parameter value detection means and rotation speed detection means) that detects an engine rotation speed N (corresponding to a parameter value) related to the gear stage of the transmission. , A vehicle speed detection sensor 21 (corresponding to parameter value detection means) for detecting a vehicle speed S (corresponding to a parameter value) related to the gear stage of the transmission, an accelerator opening detection sensor 22 for detecting the accelerator opening A, an engine And a clutch switch 23 (corresponding to an on / off state detecting means) for detecting an on / off state of a clutch (not shown) that can transmit the power to the transmission. The clutch switch 23 is turned on when the clutch is disengaged, and is turned off when the clutch is engaged. And the detection result of the various sensors 20-23 is input into ECU30.

  The ECU 30 includes a deceleration state detection unit 31, a frequency calculation unit 32, a storage unit 33, a time measuring unit 34, and a voltage control unit 35. The deceleration state detection means 31 detects the deceleration state of the vehicle based on the detection result of the accelerator opening detection sensor 22. Specifically, the deceleration state detection means 31 determines that the vehicle is in a deceleration state when the accelerator opening A is fully closed, and otherwise the vehicle is in a non-deceleration state (that is, a constant speed state). Or acceleration state).

  The frequency calculation means 32 calculates the frequency at which the transmission is shifted down when the vehicle is decelerating based on the detection results of the deceleration state detection means 31, the engine rotation speed detection sensor 20, and the vehicle speed detection sensor 21. Yes. Specifically, assuming that the vehicle is decelerated once when the engine rotational speed N is equal to or higher than the first predetermined speed α, the frequency calculation means 32 has shifted the transmission down for the last 10 times. The frequency is calculated based on the number of times. In this embodiment, it is assumed that when the gear stage of the transmission is reduced by one stage, the gear is shifted down once. As described above, it is learned whether the transmission is frequently shifted down when the vehicle is decelerating.

  The storage means 33 stores the frequency calculated by the frequency calculation means 32 and the frequency at which the transmission is shifted down while the vehicle is decelerating. The time measuring means 34 is for measuring a predetermined time. When the deceleration state detecting unit 31 detects the vehicle deceleration state and the clutch switch 23 detects the clutch disengagement state, the time measuring unit 34 measures the time during which the disengaged state is maintained. .

  The voltage control means 35 is for controlling the output voltage of the generator 11. The voltage control means 35 uses the output voltage of the generator 11 as the first voltage for promoting the charging of the battery 10 when the deceleration state of the vehicle is detected by the deceleration state detection means 31. When the non-deceleration state of the vehicle is detected, the second voltage is set to be smaller than the first voltage for suppressing the charging of the battery 10, and when the clutch disengagement state is detected by the clutch switch 23, the deceleration state detection means Even if the deceleration state of the vehicle is detected by 31, the second voltage is temporarily set, and then the first voltage is set when the clutch switch 23 detects the clutch connection state.

  The voltage control means 35 detects the deceleration state of the vehicle by the deceleration state detection means 31 when the frequency of the transmission being shifted down in the deceleration state stored in the storage means 33 is not less than a predetermined frequency. Even if the clutch disengagement state is detected by the clutch switch 23, the output voltage of the generator 11 is not temporarily set to the second voltage but to the first voltage.

  Further, the voltage control means 35 determines a predetermined time for keeping the detected clutch disengaged time counted by the time measuring means 34 when the vehicle deceleration state is detected and the clutch disengaged state is detected. When the time becomes j or more, the output voltage of the generator 11 is set to the second voltage instead of the first voltage even if the transmission is shifted down when the vehicle is decelerated. It is like that. The predetermined time j becomes longer as the engine speed N detected by the engine speed detection sensor 20 when the clutch disengagement state is detected by the clutch switch 23 is larger.

-Control of vehicle generator control device-
Hereinafter, the control of the vehicle generator control device 1 will be described with reference to the flowchart of FIG.

  In step S1, the engine speed N, the vehicle speed S, the accelerator opening A, and the on / off state of the clutch switch 23 are read. In step S2, a gear stage Gp of the transmission is calculated based on the read engine speed N and vehicle speed S.

  In step S3, it is determined whether or not the read accelerator opening A is fully closed. That is, based on the accelerator opening A, it is determined whether or not the vehicle is in a deceleration state. If the decision result in the step S3 is YES, the process advances to a step S4 so as to decide whether or not the read engine rotational speed N is equal to or higher than the first predetermined speed α.

  If the determination result in step S4 is YES, the process proceeds to step S5, and it is determined whether or not the frequency at which the transmission is shifted down when the vehicle is decelerating is equal to or higher than a predetermined frequency. Specifically, assuming that the vehicle is decelerated once when the engine rotational speed N is equal to or higher than the first predetermined speed α, the number of times the transmission has been downshifted in the past 10 times is 5 times or more. It is determined whether or not there is.

  If the determination result in step S5 is YES, the process proceeds to step S6, and it is determined whether or not the calculated gear position of the transmission is three or more. If the decision result in the step S6 is YES, the process advances to a step S7 to decide whether or not the clutch is disengaged based on the read on / off state of the clutch switch 23.

  If the decision result in the step S7 is YES, the process proceeds to a step 8, and an elapsed time t from when the clutch is disengaged until the disengaged state is counted is counted. In step S9, it is determined whether the counted elapsed time t is equal to or longer than a predetermined time j.

  If the decision result in the step S9 is YES, the process proceeds to a step S10 to reset the timer. In step S11, the output voltage of the generator 11 is set to the second voltage. Then return to the start.

  When the determination result of step S7 is NO and when the determination result of step S9 is NO, the process proceeds to step S12, and the output voltage of the generator 11 is set as the first voltage. Then return to the start.

  If the determination result in step S4 is NO, if the determination result in step S5 is NO, and if the determination result in step S6 is NO, the process proceeds to step S13 to reset the timer. Here, when the determination result of step S6 is NO, that is, when the gear stage of the transmission is 2 or less, the deceleration of the rotational speed of the engine is large. Therefore, in such a case, the output voltage of the generator 11 is controlled without taking into consideration the elapsed time t from when the clutch is disengaged until the disengaged state ends.

  In step S14, it is determined whether or not the clutch is disengaged based on the read on / off state of the clutch switch 23. When the determination result in step S14 is NO, the process proceeds to step S15, and it is determined whether or not the read engine speed N is equal to or lower than the second predetermined speed β. The second predetermined speed β is a lower limit rotational speed (fuel return rotational speed) of the engine and is smaller than the first predetermined speed α. When the determination result of step S15 is NO, the process proceeds to step S16, and the output voltage of the generator 11 is set as the first voltage. Then return to the start.

  If the determination result of step S3 is NO, the process proceeds to step S17 to reset the timer. Thereafter, the process proceeds to step S18.

  If the determination result in step S14 is YES and if the determination result in step S15 is YES, the process proceeds to step S18.

  In step S18, the output voltage of the generator 11 is set to the second voltage. Then return to the start.

-Effect-
As described above, according to the present embodiment, when the frequency calculated by the frequency calculation unit 32 and the transmission is shifted down when the vehicle is decelerating is equal to or higher than a predetermined frequency, the deceleration state detection unit 31 decelerates the vehicle. Even when the state is detected and the clutch disengagement state is detected by the clutch switch 23, the output voltage of the generator 11 is continued by the voltage control means 35 to be the first voltage for promoting the charging of the battery 10. Therefore, when the frequency of the transmission being shifted down is relatively high while the vehicle is decelerating, the output voltage of the generator 11 does not increase or decrease even if the transmission is shifted down while the vehicle is decelerating. For this reason, it is possible to suppress the occurrence of adverse effects caused by fluctuations in voltage and power generation torque.

  In addition, when the vehicle is decelerated and the frequency at which the transmission is shifted down is equal to or higher than a predetermined frequency, the output voltage of the generator 11 is maintained even if the vehicle decelerating state is detected and the clutch disengaged state is detected. And since it is set as the 1st voltage for accelerating charge of the battery 10, the charge amount of the battery 10 can be increased.

  When the time t during which the clutch is disengaged, which is timed by the time measuring means 34, is equal to or longer than the predetermined time j, the transmission is shifted down when the vehicle is decelerated, as calculated by the frequency calculating means 32. Even if the applied frequency is equal to or higher than the predetermined frequency, the voltage control means 35 sets the output voltage of the generator 11 to a second voltage for suppressing charging of the battery 10 that is smaller than the first voltage. The load can be reduced. Therefore, it is possible to suppress the occurrence of engine stall.

  Further, the predetermined time j is increased as the engine speed detected by the engine speed detection sensor 20 when the clutch disengaged state is detected by the clutch switch 23 is increased. The longer the rotation speed is, the longer the duration for which the output voltage of the generator 11 is continued to be the first voltage. Therefore, the charge amount of the battery 10 increases as the engine speed increases in the disengaged state of the clutch.

(Other embodiments)
In the above embodiment, assuming that the vehicle is decelerated once when the rotational speed N of the engine is equal to or higher than the first predetermined speed α, the vehicle is operated based on the number of times the transmission is downshifted in the last 10 times. Although the frequency at which the transmission is shifted down in the deceleration state is calculated, the frequency at which the transmission is shifted down when the vehicle is in the deceleration state may be calculated by means other than this.

  Moreover, in the said embodiment, although it determines whether the frequency | count that the transmission was shifted down is 5 times or more in step S5, this number may be arbitrary numbers other than five.

  Moreover, in the said embodiment, although the memory | storage means 33 is provided, this does not need to be provided.

  The present invention is not limited to the embodiments, and can be implemented in various other forms without departing from the spirit or main features thereof.

  As described above, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. The scope of the present invention is indicated by the claims, and is not restricted by the text of the specification. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  As described above, the control device for a vehicular generator according to the present invention has a problem in that when the transmission is frequently shifted down while the vehicle is in a decelerating state, an adverse effect caused by fluctuations in voltage and power generation torque occurs. It can also be used for suppressing purposes.

It is a schematic block diagram of the control apparatus of the generator for vehicles. It is a flowchart which shows control of the control apparatus of the generator for vehicles.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Control apparatus for vehicle generators 10 Battery 11 Generator 12 Electric load 20 Engine rotation speed detection sensor (parameter value detection means, rotation speed detection means)
21 Vehicle speed detection sensor (parameter value detection means)
22 Accelerator opening detection sensor 23 Clutch switch (intermittent state detection means)
30 Electronic control unit 31 Deceleration state detection means 32 Frequency calculation means 33 Storage means 34 Timekeeping means 35 Voltage control means

Claims (3)

A battery for supplying electric power to an electric load of a vehicle equipped with a manual transmission;
A generator driven by the vehicle engine to supply power to the electrical load and to supply power to the battery for charging;
Deceleration state detection means for detecting the deceleration state of the vehicle;
An on / off state detecting means for detecting an on / off state of a clutch that enables transmission of the power of the engine to the transmission;
The output voltage of the generator is set to a first voltage for promoting the charging of the battery when the deceleration state of the vehicle is detected by the deceleration state detection means, and the non-deceleration state of the vehicle is determined by the deceleration state detection means. When detected, the second voltage for suppressing charging of the battery is smaller than the first voltage, and when the disengaged state detecting means detects the clutch disengaged state, the deceleration state detecting means detects the vehicle. A control device for a vehicular generator comprising voltage control means for setting the second voltage even if a deceleration state is detected,
Parameter value detecting means for detecting a parameter value related to the gear stage of the transmission;
Calculation means for calculating a frequency at which the transmission is shifted down in a deceleration state of the vehicle based on detection results of the deceleration state detection unit and the parameter value detection unit;
When the frequency calculated by the calculation means is equal to or higher than a predetermined frequency, the voltage control means detects the deceleration state of the vehicle by the deceleration state detection means and detects the disengagement state of the clutch by the intermittent state detection means. However, it is comprised so that the output voltage of the said generator may be said 1st voltage, The control apparatus of the generator for vehicles characterized by the above-mentioned. The vehicle generator control device according to claim 1,
When the vehicle deceleration state is detected by the deceleration state detection unit and the clutch disengagement state is detected by the intermittent state detection unit, the vehicle further comprises timing means for measuring the time during which the disengagement state is maintained,
The voltage control means, when the time counted by the time counting means becomes a predetermined time or more, even if the frequency calculated by the calculation means is a predetermined frequency or more, the output voltage of the generator is A control device for a vehicular generator, which is configured to have two voltages. The control device for a vehicle generator according to claim 2,
A rotation speed detecting means for detecting the rotation speed of the engine;
The vehicle generator control according to claim 1, wherein the predetermined time is longer as the rotational speed of the engine detected by the rotational speed detection means when the clutch disengagement state is detected by the intermittent state detection means is longer. apparatus.

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