JP4422499B2 - Electric pump control device - Google Patents

Electric pump control device Download PDF

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Publication number
JP4422499B2
JP4422499B2 JP2004011156A JP2004011156A JP4422499B2 JP 4422499 B2 JP4422499 B2 JP 4422499B2 JP 2004011156 A JP2004011156 A JP 2004011156A JP 2004011156 A JP2004011156 A JP 2004011156A JP 4422499 B2 JP4422499 B2 JP 4422499B2
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electric pump
vehicle speed
sound
noise
control device
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JP2005201225A (en
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竜彦 水谷
英治 柳田
哲広 土江
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Aisin AW Co Ltd
Toyota Motor Corp
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Aisin AW Co Ltd
Toyota Motor Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity

Description

本発明は、車載ユニット用の冷却液を送出する電動ポンプの動作の制御を行う制御装置に関する。   The present invention relates to a control device that controls the operation of an electric pump that delivers coolant for an in-vehicle unit.

トランスアクスルユニットや、自動変速機ユニット、無段変速機ユニット等の車載ユニットを、冷却液を循環させることによって冷却する冷却システムがある。この種の冷却システムには、冷却液を送出するポンプとして、電動ポンプを採用しているものがある。この場合、電動ポンプは、例えば車載ユニット内の冷却液を吸引し、ラジエータに向けて送出する。そして、ラジエータで冷却された冷却液が車載ユニット内（の冷却配管）に戻り、車載ユニットが冷却される。   There is a cooling system that cools in-vehicle units such as a transaxle unit, an automatic transmission unit, and a continuously variable transmission unit by circulating a coolant. Some cooling systems of this type employ an electric pump as a pump for delivering a coolant. In this case, the electric pump, for example, sucks the coolant in the in-vehicle unit and sends it out to the radiator. And the cooling fluid cooled with the radiator returns in the in-vehicle unit (cooling piping), and the in-vehicle unit is cooled.

特開２０００−１８３７７号公報JP 2000-18377 A

しかしながら、かかる冷却システムでは、電動ポンプの動作音が聴覚的に目立ってしまう場合があり、乗員に、あたかも何らかの異常が生じたかのような違和感を覚えさせてしまうことがあった。従来、そのような場合には、電動ポンプの動作音の車室内での音圧レベルを下げるべく、インシュレータや防音壁を設ける等の対策をとるが、その分、部品点数が増大し、製造の手間や製造コストの増大につながるという問題があった。   However, in such a cooling system, the operation sound of the electric pump may be audibly noticeable, and the occupant may feel uncomfortable as if some sort of abnormality occurred. Conventionally, in such a case, in order to lower the sound pressure level in the passenger compartment of the operating sound of the electric pump, measures such as providing an insulator or a soundproof wall have been taken. There has been a problem of increasing labor and manufacturing costs.

なお、自動変速機用の電動オイルポンプの騒音を低減する技術としては上記特許文献１に開示されるものがあるが、これは冷却液用の電動ポンプを想定したものではない。   In addition, although there exists a technique disclosed by the said patent document 1 as a technique of reducing the noise of the electric oil pump for automatic transmissions, this is not what assumed the electric pump for cooling fluid.

本発明にかかる電動ポンプの制御装置は、車載ユニット用の冷却液を送出する電動ポンプの動作を制御する電動ポンプの制御装置であって、電動ポンプの起動および停止を制御し、かつ、電動ポンプの動作音以外の騒音の大きさに対応する所定のパラメータに基づいて電動ポンプを駆動することにより、電動ポンプの動作音が当該騒音によってマスキングされるように構成し、かつ、電動ポンプを起動させるパラメータの閾値と停止させるパラメータの閾値とが異なる。
An electric pump control device according to the present invention is an electric pump control device that controls the operation of an electric pump that sends out coolant for an in-vehicle unit , and controls the start and stop of the electric pump , and the electric pump By driving the electric pump based on a predetermined parameter corresponding to the magnitude of noise other than the operation sound of the motor, the operation sound of the electric pump is configured to be masked by the noise , and the electric pump is started The parameter threshold value is different from the parameter threshold value to be stopped.

また、上記本発明にかかる電動ポンプの制御装置では、電動ポンプの流量を可変制御するのが好適である。   In the electric pump control device according to the present invention, it is preferable to variably control the flow rate of the electric pump.

また、上記本発明にかかる電動ポンプの制御装置では、上記パラメータを車速とするのが好適である。   In the electric pump control apparatus according to the present invention, it is preferable that the parameter is a vehicle speed.

以下、本発明の好適な実施形態について図面を参照して説明する。図１は、本発明の実施形態にかかる電動ポンプ１６の制御装置１８を含む車載ユニット用の冷却システム１０の要部構成の一例を示す図である。   Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram illustrating an example of a configuration of a main part of a cooling system 10 for an in-vehicle unit including a control device 18 for an electric pump 16 according to an embodiment of the present invention.

図１の例では、冷却システム１０は、車載ユニット（例えば、トランスアクスルユニット、自動変速機ユニット、無段変速機ユニット等）１２用の冷却液（例えばＡＴＦ、不凍液等）を冷却するラジエータ１４と、車載ユニット１２から冷却液を吸入してラジエータ１４に送出する電動ポンプ１６と、電動ポンプ１６の動作を制御する制御装置１８と、を備えており、電動ポンプ１６の吐出動作によって、冷却液が閉じた冷却配管２０内を循環するように構成されている。電動ポンプ１６は、ポンプ（例えばギヤポンプ等）２２と電動モータ（例えばＤＣモータ等）２４とから成る。なお、車載ユニット１２、電動ポンプ１６、およびラジエータ１４の配列順は、図１の例には限定されない。   In the example of FIG. 1, the cooling system 10 includes a radiator 14 that cools a cooling liquid (for example, ATF, antifreeze liquid, etc.) for an in-vehicle unit (for example, a transaxle unit, an automatic transmission unit, a continuously variable transmission unit, etc.) The electric pump 16 that sucks the coolant from the in-vehicle unit 12 and sends it to the radiator 14 and the control device 18 that controls the operation of the motor 16 are provided. It is configured to circulate in the closed cooling pipe 20. The electric pump 16 includes a pump (for example, a gear pump) 22 and an electric motor (for example, a DC motor) 24. In addition, the arrangement | sequence order of the vehicle-mounted unit 12, the electric pump 16, and the radiator 14 is not limited to the example of FIG.

制御装置（例えばＥＣＵ等）１８は、所定のパラメータ（例えば車速等）に基づいて、電動ポンプ１６の動作音が電動ポンプ１６の動作音以外の騒音でマスキングされるように、電動ポンプ１６の動作を制御する。以下、制御装置１８による電動ポンプ１６の制御例について、図２〜図４を参照して説明する。   The control device (e.g., ECU) 18 operates the electric pump 16 based on a predetermined parameter (e.g., vehicle speed) so that the operation sound of the electric pump 16 is masked by noise other than the operation sound of the electric pump 16. To control. Hereinafter, control examples of the electric pump 16 by the control device 18 will be described with reference to FIGS.

図２は、車室内におけるロードノイズその他の騒音および電動ポンプ１６の動作音の特定の可聴周波数帯域（電動ポンプ１６の動作音が大きい帯域）における音圧、およびこの場合における電動ポンプ１６の制御例を模式的に示す図であり、横軸は車速Ｖ［ｋｍ／ｈ］、縦軸は車室内での音圧［ｄＢ］である。   FIG. 2 shows a sound pressure in a specific audible frequency band (a band in which the operation sound of the electric pump 16 is large) of road noise and other noises in the vehicle interior and operation sound of the electric pump 16, and a control example of the electric pump 16 in this case. The horizontal axis represents the vehicle speed V [km / h], and the vertical axis represents the sound pressure [dB] in the passenger compartment.

電動ポンプ１６の動作音の音圧が騒音の音圧より低いときには、電動ポンプ１６の動作音はその騒音によってマスキングされる。ここで、図２に示すように、ロードノイズ等の暗騒音の音圧は車速Ｖが増大するにつれて増大するのに対し、電動ポンプ１６の動作音の音圧は車速Ｖには依らずほぼ一定である。そこで、制御装置１８は、パラメータとして車速Ｖを取得し、車速Ｖが、電動ポンプ１６の音圧と騒音の音圧とが等しくなる閾値車速Ｖｔｈ０と同じであるかまたはより高い場合にのみ電動ポンプ１６を駆動し（ＯＮ）、それ以外の場合には電動ポンプ１６を駆動しない（ＯＦＦ）。こうすることで、電動ポンプ１６は、その動作音が騒音によってマスキングされる状態でのみ駆動されることとなり、車室内の乗員は、電動ポンプ１６の動作音を聴覚的に認識しにくくなる。   When the sound pressure of the operation sound of the electric pump 16 is lower than the sound pressure of the noise, the operation sound of the electric pump 16 is masked by the noise. Here, as shown in FIG. 2, the sound pressure of background noise or other background noise increases as the vehicle speed V increases, whereas the sound pressure of the operating sound of the electric pump 16 is substantially constant regardless of the vehicle speed V. It is. Therefore, the control device 18 acquires the vehicle speed V as a parameter, and the electric pump is used only when the vehicle speed V is equal to or higher than the threshold vehicle speed Vth0 at which the sound pressure of the electric pump 16 and the sound pressure of the noise are equal. 16 is driven (ON), otherwise, the electric pump 16 is not driven (OFF). By doing so, the electric pump 16 is driven only in a state where the operation sound is masked by the noise, and it becomes difficult for the passenger in the vehicle compartment to recognize the operation sound of the electric pump 16 audibly.

図３は、車室内におけるロードノイズその他の騒音および電動ポンプ１６の動作音の音圧の別の一例（上段）と、その場合における電動ポンプ１６の制御例（下段）を模式的に示す図であり、上段のグラフにおいて横軸は車速Ｖ［ｋｍ／ｈ］、縦軸は車室内での音圧［ｄＢ］である。   FIG. 3 is a diagram schematically showing another example (upper stage) of road noise and other noises in the passenger compartment and the sound pressure of the operating sound of the electric pump 16, and a control example (lower stage) of the electric pump 16 in that case. In the upper graph, the horizontal axis represents the vehicle speed V [km / h], and the vertical axis represents the sound pressure [dB] in the passenger compartment.

電動ポンプ１６には、図３の上段に示すように、その起動時にのみ動作音が大きくなるものがある。その場合に、制御装置１８は、車両の増速時（すなわち電動ポンプ１６の起動時）には、車速Ｖが第１の閾値車速Ｖｔｈ１（すなわち電動ポンプ１６の起動時における動作音の音圧と騒音の音圧とが等しくなる車速、以下増速時の車速閾値と称する）と同じであるかまたは高くなった時点で電動ポンプ１６をＯＮし、他方、減速時（すなわち電動ポンプ１６の停止時）には、車速Ｖが第２の閾値車速Ｖｔｈ２（すなわち電動ポンプ１６の起動時以外の動作音の音圧と騒音の音圧とが等しくなる車速、以下減速時の車速閾値と称する、ただし、Ｖｔｈ２≠Ｖｔｈ１，Ｖｔｈ２＜Ｖｔｈ１）と同じであるかまたは高いうちに電動ポンプ１６をＯＦＦとする。こうすることで、起動時に動作音が大きくなる電動ポンプ１６についても、当該騒音によるマスキング効果を得ることができる。   As shown in the upper part of FIG. 3, some electric pumps 16 have a loud operating sound only when they are activated. In this case, the control device 18 determines that the vehicle speed V is equal to the first threshold vehicle speed Vth1 (that is, the sound pressure of the operating sound when the electric pump 16 is started) when the vehicle speed is increased (that is, when the electric pump 16 is started). The electric pump 16 is turned on when the vehicle speed is equal to or higher than the vehicle speed at which the sound pressure of the noise becomes equal, hereinafter referred to as the vehicle speed threshold value at the time of acceleration, and on the other hand, at the time of deceleration (ie, when the electric pump 16 is stopped) ), The vehicle speed V is referred to as a second threshold vehicle speed Vth2 (that is, the vehicle speed at which the sound pressure of the operating sound and the sound pressure of the noise other than when the electric pump 16 is activated are equal, hereinafter referred to as the vehicle speed threshold at the time of deceleration, The electric pump 16 is turned off while Vth2 ≠ Vth1, Vth2 <Vth1) or higher. By doing so, it is possible to obtain a masking effect due to the noise even for the electric pump 16 in which the operation sound becomes loud at the time of activation.

図４は、車室内におけるロードノイズその他の騒音と可変流量の電動ポンプ１６の動作音の音圧、およびその場合の吐出流量を模式的に示す図であり、横軸は車速Ｖ［ｋｍ／ｈ］、縦軸は車室内での音圧［ｄＢ］である。   FIG. 4 is a diagram schematically showing road noise and other noises in the vehicle interior, the sound pressure of the operating sound of the variable flow electric pump 16, and the discharge flow rate in that case, and the horizontal axis represents the vehicle speed V [km / h]. ], The vertical axis represents the sound pressure [dB] in the passenger compartment.

電動ポンプ１６が可変流量ポンプである場合、その吐出流量に応じて、電動ポンプ１６の動作音も変化する。そこで、電動ポンプ１６が可変流量ポンプである場合には、車速Ｖに応じた騒音によりマスクできる範囲で電動ポンプ１６の吐出量を変化させることで、電動ポンプ１６の動作音の音圧を騒音の音圧より低くすることができる。例えば図４の例では車速Ｖが高くなるほど電動ポンプの吐出量を段階的に多くする制御を示している。制御装置１８は、各車速閾値（Ｖｔｈ３，Ｖｔｈ４，Ｖｔｈ５）で、吐出流量（Ｑ１，Ｑ２，Ｑ３）を切り替えている。このような制御を行う場合には、電動ポンプ１６の動作音以外の騒音によるマスキング効果を得ることができる上、さらに、車速Ｖが比較的低い領域でも冷却液が吐出されて冷却能力が高くなるというメリットがある。なお、電動ポンプ１６の吐出量は、例えば電動モータ２４に印加する駆動電圧を変化させることで可変制御することができる。また、図４のように流量を多段階に切り替えるのではなく、無段階に可変制御（連続可変制御）するようにしてもよい。   When the electric pump 16 is a variable flow pump, the operation sound of the electric pump 16 also changes according to the discharge flow rate. Therefore, when the electric pump 16 is a variable flow pump, the sound pressure of the operation sound of the electric pump 16 is changed by changing the discharge amount of the electric pump 16 within a range that can be masked by noise according to the vehicle speed V. It can be lower than the sound pressure. For example, the example of FIG. 4 shows control in which the discharge amount of the electric pump is increased stepwise as the vehicle speed V increases. The control device 18 switches the discharge flow rate (Q1, Q2, Q3) at each vehicle speed threshold value (Vth3, Vth4, Vth5). When performing such control, it is possible to obtain a masking effect due to noises other than the operation sound of the electric pump 16, and further, cooling liquid is discharged even in a region where the vehicle speed V is relatively low, so that the cooling capacity is increased. There is a merit. The discharge amount of the electric pump 16 can be variably controlled by changing the drive voltage applied to the electric motor 24, for example. Further, instead of switching the flow rate to multiple stages as shown in FIG. 4, variable control (continuous variable control) may be performed in a stepless manner.

以上、本発明の好適な実施形態について説明したが、本発明は上記実施形態に限定されるものではなく、種々の変形が可能である。例えば、図３の例では、増速時の閾値車速Ｖｔｈ１が減速時の閾値車速Ｖｔｈより高い場合について示したが、例えば電動ポンプ１６が瞬断されるため停止時の動作音の音圧が他の場合の音圧より大きくなるような場合には、減速時（電動ポンプ１６の停止時）の閾値車速Ｖｔｈ２を増速時（電動ポンプ１６の起動時）の閾値車速Ｖｔｈ１より高く設定するのが好適である。すなわち、このように電動ポンプ１６の起動時と停止時とで、起動／停止の元とするパラメータの閾値を異ならせることで、起動の際あるいは停止の際に何らかの原因で電動ポンプ１６の動作音が大きくなるような場合にも、より確実にマスキング効果を得ることができる。   The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment, and various modifications can be made. For example, in the example of FIG. 3, the case where the threshold vehicle speed Vth1 at the time of acceleration is higher than the threshold vehicle speed Vth at the time of deceleration is shown. However, for example, since the electric pump 16 is momentarily disconnected, In such a case, the threshold vehicle speed Vth2 during deceleration (when the electric pump 16 is stopped) is set higher than the threshold vehicle speed Vth1 during acceleration (when the electric pump 16 is started). Is preferred. That is, the operating sound of the electric pump 16 for some reason at the time of starting or stopping can be obtained by making the threshold value of the parameter that is the starting / stopping source different between when the electric pump 16 is started and when it is stopped. The masking effect can be obtained more reliably even when the value of the mask increases.

また、図２〜図４の例では、電動ポンプ１６の動作を制御するパラメータとして車速情報を用いたが、これに替えて、エンジンや車両駆動モータの回転数を示す情報を用いても良い。また、エンジンおよび車両駆動モータの双方を搭載するいわゆるハイブリッド車両の場合には、エンジンの動作／停止を示す情報を用いて、電動ポンプ１６のＯＮ／ＯＦＦを制御してもよい。その場合、エンジンが動作しているときには電動ポンプ１６をＯＮとし、エンジンが停止しているときには電動ポンプ１６をＯＦＦとする。こうすることで、エンジンの動作（すなわちアイドリング回転数以上での回転動作）に伴って生じる騒音により、電動ポンプ１６の動作音がマスキングされる。   In the examples of FIGS. 2 to 4, the vehicle speed information is used as a parameter for controlling the operation of the electric pump 16, but information indicating the rotation speed of the engine or the vehicle drive motor may be used instead. Further, in the case of a so-called hybrid vehicle equipped with both an engine and a vehicle drive motor, ON / OFF of the electric pump 16 may be controlled using information indicating the operation / stop of the engine. In this case, the electric pump 16 is turned on when the engine is operating, and the electric pump 16 is turned off when the engine is stopped. By doing so, the operation sound of the electric pump 16 is masked by the noise generated by the operation of the engine (that is, the rotation operation at the idling speed or higher).

本発明の実施形態にかかる電動ポンプの制御装置を含む車載ユニット用の冷却システムの要部の一構成例を示す図である。It is a figure which shows one structural example of the principal part of the cooling system for vehicle-mounted units containing the control apparatus of the electric pump concerning embodiment of this invention. 車室内における騒音および電動ポンプの動作音の音圧、および本発明の実施形態にかかる電動ポンプの制御装置による電動ポンプの一制御例を模式的に示す図である。It is a figure which shows typically the example of 1 control of the electric pump by the noise in a vehicle interior, the sound pressure of the operating sound of an electric pump, and the control apparatus of the electric pump concerning embodiment of this invention. 車室内における騒音および電動ポンプの動作音の音圧、および本発明の実施形態にかかる電動ポンプの制御装置による電動ポンプの別の制御例を模式的に示す図である。It is a figure which shows typically the noise in a vehicle interior, the sound pressure of the operating sound of an electric pump, and another control example of the electric pump by the control apparatus of the electric pump concerning embodiment of this invention. 車室内における騒音および電動ポンプの動作音の音圧、および本発明の実施形態にかかる電動ポンプの制御装置による電動ポンプの別の制御例を模式的に示す図である。It is a figure which shows typically the noise in a vehicle interior, the sound pressure of the operating sound of an electric pump, and another control example of the electric pump by the control apparatus of the electric pump concerning embodiment of this invention.

符号の説明Explanation of symbols

１０ 冷却システム、１２ 車載ユニット、１４ ラジエータ、１６ 電動ポンプ、１８ 制御装置、２０ 冷却配管、２２ ポンプ、２４ 電動モータ。   DESCRIPTION OF SYMBOLS 10 Cooling system, 12 Car-mounted unit, 14 Radiator, 16 Electric pump, 18 Control apparatus, 20 Cooling piping, 22 Pump, 24 Electric motor.

Claims (2)

車載ユニット用の冷却液を送出する電動ポンプの動作を制御する電動ポンプの制御装置であって、
電動ポンプの起動および停止を制御し、
かつ、電動ポンプの動作音以外の騒音の大きさに対応する所定のパラメータに基づいて電動ポンプを駆動することにより、電動ポンプの動作音が当該騒音によってマスキングされるようにし、
かつ、電動ポンプを起動させるパラメータの閾値と停止させるパラメータの閾値とが異なることを特徴とする電動ポンプの制御装置。 A control device for an electric pump that controls the operation of an electric pump that sends out coolant for an in-vehicle unit,
Control the start and stop of the electric pump,
And by driving the electric pump based on a predetermined parameter corresponding to the magnitude of noise other than the operating sound of the electric pump, the operating sound of the electric pump is masked by the noise ,
And the threshold value of the parameter which starts an electric pump differs from the threshold value of the parameter which stops , The control apparatus of the electric pump characterized by the above-mentioned. 前記パラメータは車速であることを特徴とする請求項１に記載の電動ポンプの制御装置。The electric pump control device according to claim 1, wherein the parameter is a vehicle speed.
JP2004011156A 2004-01-19 2004-01-19 Electric pump control device Expired - Fee Related JP4422499B2 (en)

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US20140041619A1 (en) * 2011-04-27 2014-02-13 Nissan Motor Co., Ltd. Lubrication control apparatus for vehicle in-wheel motor unit
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JP6737696B2 (en) * 2016-12-01 2020-08-12 トヨタ自動車株式会社 Oil supply device for vehicle engine
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