JP5914414B2 - Vehicle oil suction device - Google Patents

Vehicle oil suction device Download PDF

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JP5914414B2
JP5914414B2 JP2013116637A JP2013116637A JP5914414B2 JP 5914414 B2 JP5914414 B2 JP 5914414B2 JP 2013116637 A JP2013116637 A JP 2013116637A JP 2013116637 A JP2013116637 A JP 2013116637A JP 5914414 B2 JP5914414 B2 JP 5914414B2
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oil
suction
pump
oil pump
communication path
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JP2014234765A (en
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圭司 東上
圭司 東上
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Priority to JP2013116637A priority Critical patent/JP5914414B2/en
Priority to CN201410228841.8A priority patent/CN104214091B/en
Priority to US14/288,296 priority patent/US20140356195A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F04C15/064—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston machines or pumps
    • F04C15/066—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston machines or pumps of the non-return type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/20—Fluid liquid, i.e. incompressible
    • F04C2210/206—Oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/20—Flow
    • F04C2270/205—Controlled or regulated

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)
  • General Details Of Gearings (AREA)

Description

本発明は、エンジンなど車両の駆動源から伝達された回転で駆動する機械式のオイルポンプを備えた車両のオイル吸入装置に関する。   The present invention relates to an oil intake device for a vehicle including a mechanical oil pump that is driven by rotation transmitted from a drive source of the vehicle such as an engine.

従来、車両に搭載された変速機などにおいて、ギヤや回転軸などの潤滑並びに冷却用のオイル（潤滑油又は作動油）の移送に用いられるオイルポンプとして、エンジンなど車両の駆動源から伝達された回転で駆動する機械式のオイルポンプ（ギヤポンプ）がある。この種のオイルポンプの設計では、必要な流量を設定するにあたって、規定回転数より低い回転領域で必要なオイルの流量を確保できるように、過去の実績や経験値から安全率を持った流量に設定している。そのため、規定回転数を超える高回転領域では、必要以上の流量のオイルを吸い上げることとなる。そのため、このような機械式のオイルポンプでは、規定回転数を越える高回転領域で無駄な駆動トルク（ポンプ駆動力）が発生することで、当該駆動トルクがエンジンなどの駆動源に対する損失となっていた。   Conventionally, in a transmission or the like mounted on a vehicle, it is transmitted from a drive source of a vehicle such as an engine as an oil pump used to transfer lubrication and cooling oil (lubricating oil or hydraulic oil) of gears and rotating shafts. There is a mechanical oil pump (gear pump) that is driven by rotation. In this type of oil pump design, when setting the required flow rate, the flow rate has a safety factor based on past results and experience values so that the required oil flow rate can be secured in the rotation range lower than the specified rotation speed. It is set. Therefore, in a high rotation region exceeding the specified rotation speed, oil with a flow rate higher than necessary is sucked up. For this reason, in such a mechanical oil pump, useless driving torque (pump driving force) is generated in a high rotational speed region exceeding a specified rotational speed, so that the driving torque is a loss to a driving source such as an engine. It was.

この点に関して、機械式のオイルポンプの駆動トルクを低減するための機構として、流量を可変させる機構やポンプ回転数を低減させる機構を採用することが一般的である。流量を可変させる機構としては、例えば、特許文献１に示すように、油圧感応式スプール弁とリリーフ回路の組合せによる機構（リリーフ回路付可変流量ポンプ）が提案されている。また、ポンプ回転数を制御する機構としては、例えば、特許文献２に示すように、遊星ギヤを介してポンプ回転数を低減させる機構が提案されている。   In this regard, as a mechanism for reducing the drive torque of a mechanical oil pump, it is common to employ a mechanism that varies the flow rate or a mechanism that reduces the pump rotation speed. As a mechanism for varying the flow rate, for example, as shown in Patent Document 1, a mechanism (variable flow pump with a relief circuit) based on a combination of a hydraulically sensitive spool valve and a relief circuit has been proposed. As a mechanism for controlling the pump speed, for example, as shown in Patent Document 2, a mechanism for reducing the pump speed through a planetary gear has been proposed.

しかしながら、上記のリリーフ回路付可変流量ポンプは、部品点数が多く高い寸法精度が要求されるため、構造の複雑化や重量増及びコスト増につながるおそれがある。また、構造が複雑であることで、オイルに含まる金属粉などの微小異物（コンタミネーション）に対する耐性にも課題がある。また、遊星ギヤでポンプの入力回転数を低減させる機構の場合にも、その機構が複雑で装置が大型化してしまうという問題がある。   However, since the above variable flow pump with a relief circuit has a large number of parts and requires high dimensional accuracy, the structure may be complicated, the weight may be increased, and the cost may be increased. In addition, since the structure is complicated, there is a problem in resistance to minute foreign matters (contamination) such as metal powder contained in oil. Also, in the case of a mechanism that reduces the input rotational speed of the pump with a planetary gear, there is a problem that the mechanism is complicated and the apparatus becomes large.

特開平７−２３３７８７号公報JP-A-7-233787 特開２００５−２０７３５７号公報JP 2005-207357 A

本発明は上述の点に鑑みてなされたものであり、その目的は、部品点数を少なく抑えた簡単な構成で、車両の駆動源から伝達された回転で駆動する機械式のオイルポンプの駆動トルクを低減することができ、駆動源に与える損失を効果的に低減できるオイル吸入装置を提供することにある。   SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to drive torque of a mechanical oil pump that is driven by rotation transmitted from a drive source of a vehicle with a simple configuration with a reduced number of parts. It is an object of the present invention to provide an oil suction device that can reduce the loss to the drive source and effectively reduce the loss.

上記課題を解決するため、本発明にかかる車両のオイル吸入装置は、車両の駆動源から伝達された回転で駆動する機械式のポンプ部（１５）をケーシング（１２）内に具備するオイルポンプ（１０）を備え、オイル貯留部（２）のオイルをオイルポンプ（１０）に吸入して圧送するオイル吸入装置（１）であって、オイル貯留部（２）のオイルがオイルポンプ（１０）の吸入部（１１）に吸入されるまでの吸入区間に設けた空気吸入部（２０）を備え、空気吸入部（２０）は、大気側（１００）と連通する第１連通路（２１）と、オイルポンプ（１０）の吸入部（１１）と連通する第２連通路（２２）と、第１連通路（２１）と第２連通路（２２）との間の開閉を切り替え可能な開閉機構（２３）と、を備え、オイルポンプ（１０）のオイル吸入圧力（Ｐ）が所定圧（Ｐ１）以下の負圧になったときに開閉機構（２３）が開くことで、オイル貯留部（２）から吸込管（３０）に吸入されたオイルに空気吸入部（２０）から吸入された空気が混入されるように構成したことを特徴とする。 In order to solve the above-described problems, an oil suction device for a vehicle according to the present invention includes an oil pump (15) provided in a casing (12) with a mechanical pump unit (15) driven by rotation transmitted from a drive source of the vehicle. 10), an oil suction device (1) for sucking and pumping oil from the oil reservoir (2) into the oil pump (10), wherein the oil in the oil reservoir (2) is supplied to the oil pump (10). An air suction part (20) provided in the suction section until the suction part (11) is inhaled, and the air suction part (20) includes a first communication path (21) communicating with the atmosphere side (100), A second communication path (22) communicating with the suction part (11) of the oil pump (10), and an opening / closing mechanism capable of switching between opening and closing between the first communication path (21) and the second communication path (22) ( 23) and oil of the oil pump (10) When the input pressure (P) becomes a negative pressure equal to or lower than the predetermined pressure (P1), the open / close mechanism (23) is opened, so that the oil sucked into the suction pipe (30) from the oil reservoir (2) is sucked into the air. It is characterized in that the air sucked from the part (20) is mixed.

本発明にかかる車両のオイル吸入装置では、オイル貯留部のオイルがオイルポンプの吸入部に吸入されるまでの吸入区間に上記の空気吸入部を設けたことで、オイルポンプの吸入圧力が所定圧以下の負圧になったときに、当該空気吸入部でオイルポンプに空気を吸入させてその駆動トルクを低減させる構造としている。これにより、特に、規定回転数を越える高回転領域で余剰となっていた吐出量分のポンプ駆動トルクを低減させることができる。したがって、オイルポンプに回転を伝達している駆動源の駆動トルクを低下させることができ、駆動源に与える損失を効果的に低減できる。   In the vehicle oil suction device according to the present invention, the air suction portion is provided in the suction section until the oil in the oil storage portion is sucked into the suction portion of the oil pump. When the following negative pressure is reached, the air suction section sucks air into the oil pump to reduce the driving torque. Thereby, it is possible to reduce the pump driving torque corresponding to the discharge amount that is surplus particularly in the high rotation region exceeding the specified rotation speed. Therefore, the drive torque of the drive source that transmits rotation to the oil pump can be reduced, and the loss given to the drive source can be effectively reduced.

上記の空気吸入部は、オイル吸入圧力に応じてオイルポンプへの空気の吸い込みの有無が切り替わる構造である。したがって、オイルポンプの回転数が高回転の領域で吸入負圧が上昇したときに、オイルポンプへ吸入されるオイルに空気を混入させることができる。したがって、オイルポンプの高回転領域での吸入オイル量の増加を抑制することができ、ポンプ駆動力の低減効果及び吸入負圧低下の効果が得られる。これにより、簡単な構成で駆動源の駆動トルクを低下させることができる。   The air suction section has a structure in which the presence or absence of air suction into the oil pump is switched according to the oil suction pressure. Therefore, when the suction negative pressure rises in a region where the rotation speed of the oil pump is high, air can be mixed into the oil sucked into the oil pump. Therefore, an increase in the amount of intake oil in the high rotation region of the oil pump can be suppressed, and the effect of reducing the pump driving force and the effect of reducing the intake negative pressure can be obtained. Thereby, the drive torque of a drive source can be reduced with a simple configuration.

また、上記のオイル吸入装置では、開閉機構（２３）は、第１連通路（２１）と第２連通路（２２）との間を開閉する弁体（２５）と、弁体（２５）を閉位置へ付勢する付勢手段（２６）と、を備え、オイルポンプ（１０）のオイル吸入圧力（Ｐ）が所定圧（Ｐ１）以下の負圧になると、弁体（２５）が付勢手段（２６）の付勢力に抗して閉位置から開位置へ移動するように構成してよい。また、オイルポンプ（１０）のポンプ部（１５）、吸入部（１１）、空気吸入部（２０）、及び開閉機構（２３）を、オイルポンプ（１０）のケーシング（２）内に一体的に構成してもよい。さらに、ケーシング（１２）内に、ポンプ部（１５）からオイルを吐出管（６０）へ吐出するための吐出部（１３）を一体的に構成してもよい。

In the above oil suction device, the opening / closing mechanism (23) includes a valve body (25) for opening and closing between the first communication path (21) and the second communication path (22), and a valve body (25). Urging means (26) for urging to the closed position, and when the oil suction pressure (P) of the oil pump (10) becomes a negative pressure equal to or lower than a predetermined pressure (P1), the valve body (25) is urged. It may be configured to move from the closed position to the open position against the urging force of the means (26) . Further, the pump part (15), the suction part (11), the air suction part (20), and the opening / closing mechanism (23) of the oil pump (10) are integrated into the casing (2) of the oil pump (10). It may be configured. Furthermore, a discharge part (13) for discharging oil from the pump part (15) to the discharge pipe (60) may be integrally formed in the casing (12) .

この構成によれば、部品点数を少なく抑えた簡単な構成で、オイルポンプの吸入圧力が所定以上となったときに該オイルポンプに空気を吸入させることができる。
なお、上記の括弧内の符号は、後述する実施形態における構成要素の符号を本発明の一例として示したものである。 According to this configuration, air can be sucked into the oil pump when the suction pressure of the oil pump becomes a predetermined value or more with a simple configuration with a reduced number of parts.
In addition, the code | symbol in said parenthesis shows the code | symbol of the component in embodiment mentioned later as an example of this invention.

本発明にかかるオイル吸入装置によれば、部品点数を少なく抑えた簡単な構成で、車両の駆動源から伝達された回転で駆動する機械式のオイルポンプの駆動トルクを低減することができ、駆動源に与える損失を効果的に低減できる。   According to the oil suction device of the present invention, the drive torque of a mechanical oil pump driven by the rotation transmitted from the drive source of the vehicle can be reduced with a simple configuration with a reduced number of parts. The loss given to the source can be effectively reduced.

本発明の一実施形態にかかるオイル吸入装置を示す概略図である。It is the schematic which shows the oil suction device concerning one Embodiment of this invention. オイルポンプを示す図で、（ａ）は、オイルポンプの全体構成を示す図、（ｂ）は、（ａ）のＡ−Ａ矢視断面を示す図で、空気吸入バルブを示す図である。It is a figure which shows an oil pump, (a) is a figure which shows the whole structure of an oil pump, (b) is a figure which shows the AA arrow cross section of (a), and is a figure which shows an air intake valve. 空気吸入バルブの動作を説明するための図である。It is a figure for demonstrating operation | movement of an air intake valve. オイルポンプの回転数とポンプ吸入圧力の関係を示すグラフである。It is a graph which shows the relationship between the rotation speed of an oil pump, and pump suction pressure. オイルポンプの回転数とポンプトルクの関係を示すグラフである。It is a graph which shows the relationship between the rotation speed of an oil pump, and pump torque. オイルポンプの回転数とポンプ流量の関係を示すグラフである。It is a graph which shows the relationship between the rotation speed of an oil pump, and a pump flow rate.

以下、添付図面を参照して本発明の実施形態を詳細に説明する。図１は、本発明の一実施形態にかかるオイル吸入装置を示す概略図である。また、図２は、オイルポンプを示す図で、（ａ）は、オイルポンプの全体構成を示す図、（ｂ）は、（ａ）のＡ−Ａ矢視断面を示す図で、空気吸入バルブを示す図である。図１に示すように、オイル吸入装置１は、車両の駆動源であるエンジン（図示せず）から伝達された回転で駆動する機械式のオイルポンプ１０と、オイルポンプの吸込端１０ａ側に接続されてオイルバス（オイル貯留部）２内のオイルを吸入する吸込管３０と、オイルポンプの吐出端１０ｂ側に接続された吐出管６０とを備えている。   Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic view showing an oil suction device according to an embodiment of the present invention. FIG. 2 is a view showing an oil pump, (a) is a view showing the entire configuration of the oil pump, (b) is a view showing a cross section taken along the line AA in FIG. FIG. As shown in FIG. 1, the oil suction device 1 is connected to a mechanical oil pump 10 driven by rotation transmitted from an engine (not shown) that is a drive source of the vehicle, and the suction end 10a side of the oil pump. And a suction pipe 30 for sucking oil in the oil bath (oil storage part) 2 and a discharge pipe 60 connected to the discharge end 10b side of the oil pump.

オイルポンプ１０は、車両用の変速機において、ギヤなどの機械構造の潤滑並びに冷却用の作動油（オイル）の移送に用いられるオイルポンプである。このオイルポンプ１０は、エンジンの駆動力で回転するクランク軸（図示せず）の回転が伝達されて回転する機械式のオイルポンプであって、オイルを圧送するためのポンプ部１５と、吸込管３０からポンプ部１５へオイルを吸入するための吸入ポート（吸入部）１１と、ポンプ部１５から吐出管６０へオイルを吐出するための吐出ポート１３とを備える。ポンプ部１５は、ケーシング１２内に回転自在に支持されたアウタロータ１６と、該アウタロータ１６の内側において回転自在に支持されたインナロータ１７とを備える容積型のトロコイドポンプである。このオイルポンプ１０では、エンジンから伝達される回転の増減に応じてポンプ部１５によるオイルの圧送量が増減するようになっている。   The oil pump 10 is an oil pump used for lubricating a mechanical structure such as a gear and transferring cooling hydraulic oil (oil) in a vehicle transmission. The oil pump 10 is a mechanical oil pump that is rotated by the rotation of a crankshaft (not shown) that is rotated by the driving force of the engine. The oil pump 10 includes a pump unit 15 that pumps oil and a suction pipe. A suction port (suction part) 11 for sucking oil from 30 to the pump part 15 and a discharge port 13 for discharging oil from the pump part 15 to the discharge pipe 60 are provided. The pump unit 15 is a positive displacement trochoid pump that includes an outer rotor 16 that is rotatably supported in the casing 12 and an inner rotor 17 that is rotatably supported inside the outer rotor 16. In the oil pump 10, the amount of oil pumped by the pump unit 15 increases and decreases according to the increase and decrease of the rotation transmitted from the engine.

そして、本実施形態のオイルポンプ１０は、大気側１００と吸入ポート１１との間に設けた空気吸入バルブ（空気吸入部）２０を備える。空気吸入バルブ２０は、大気側１００と連通する第１連通路（大気開放部）２１と、吸入ポート１１と連通する第２連通路２２と、オイルポンプ１０の吸入圧力が所定圧（規定圧）以下の負圧になったときに第１連通路２１と第２連通路２２との間を連通させるバルブ機構（開閉機構）２３とを備えて構成される。バルブ機構２３は、第１連通路２１と第２連通路２２との間に形成した収容部２４と、該収容部２４に収容した球形状の弁体２５と、弁体２５を付勢するコイルスプリング（付勢手段）２６とを備える。弁体２５は、収容部２４内で第１連通路２１の周囲に形成した弁座部２７に着座する閉位置と、該弁座部２７から離間する開位置との間で移動可能となっている。コイルスプリング２６は、弁体２５を弁座部２７に着座する閉位置へ向けて付勢している。そして、オイルポンプ１０のオイル吸入圧力が所定圧以下の負圧になると、弁体２５がコイルスプリング２６の付勢力に抗して閉位置から開位置へ移動するようになっている。   The oil pump 10 of this embodiment includes an air intake valve (air intake portion) 20 provided between the atmosphere side 100 and the intake port 11. The air suction valve 20 includes a first communication path (atmosphere release portion) 21 communicating with the atmosphere side 100, a second communication path 22 communicating with the suction port 11, and a suction pressure of the oil pump 10 at a predetermined pressure (specified pressure). The valve mechanism (opening / closing mechanism) 23 is configured to communicate between the first communication path 21 and the second communication path 22 when the following negative pressure is reached. The valve mechanism 23 includes a housing portion 24 formed between the first communication passage 21 and the second communication passage 22, a spherical valve body 25 housed in the housing portion 24, and a coil that urges the valve body 25. And a spring (biasing means) 26. The valve body 25 is movable between a closed position where the valve body 25 is seated on the valve seat portion 27 formed around the first communication path 21 and an open position which is separated from the valve seat portion 27. Yes. The coil spring 26 urges the valve body 25 toward a closed position where the valve body 25 is seated on the valve seat portion 27. When the oil suction pressure of the oil pump 10 becomes a negative pressure equal to or lower than a predetermined pressure, the valve body 25 moves from the closed position to the open position against the urging force of the coil spring 26.

図３は、空気吸入バルブ２０の動作を説明するための図である。オイルポンプ１０のオイル吸入圧力が所定圧よりも大きい状態では、弁体２５にかかるコイルスプリング２６の付勢力と吸入ポート１１の作動油からかかる力との合力の方が、第１連通路２１を介して大気側１００からかかる力よりも大きい。したがって、弁体２５は、コイルスプリング２６の付勢力で弁座部２７に着座した状態で、第１連通路２１と第２連通路２２との間を塞いでいる。そして、オイルポンプ１０のオイル吸入圧力が負圧状態で所定圧以下になると、弁体２５にかかるコイルスプリング２６の付勢力と吸入ポート１１の作動油からかかる力との合力よりも、第１連通路２１を介して大気側１００からかかる力の方が大きくなる。そうすると、弁体２５がコイルスプリング２６の付勢力に抗して弁座部２７から離間することで、第１連通路２１と第２連通路２２との間が開かれるようになっている。これにより、オイルポンプ１０によるオイルバス２内のオイルの吸入圧力に応じて、吸込管３０からオイルバス２のオイルのみを吸入する第１吸込作動状態と、吸込管３０からオイルバス２のオイルを吸入すると共に空気吸入バルブ２０から空気を吸入する第２吸込作動状態とが切り替わる。   FIG. 3 is a view for explaining the operation of the air intake valve 20. In a state where the oil suction pressure of the oil pump 10 is larger than a predetermined pressure, the resultant force of the biasing force of the coil spring 26 applied to the valve body 25 and the force applied from the hydraulic oil of the suction port 11 is greater in the first communication path 21. It is larger than the force applied from the atmosphere side 100 through the air. Therefore, the valve body 25 blocks the space between the first communication path 21 and the second communication path 22 in a state where the valve body 25 is seated on the valve seat portion 27 by the urging force of the coil spring 26. When the oil suction pressure of the oil pump 10 becomes a predetermined pressure or less in a negative pressure state, the first reaming force is greater than the resultant force of the urging force of the coil spring 26 applied to the valve body 25 and the force applied from the hydraulic oil of the suction port 11. The force applied from the atmosphere side 100 through the passage 21 becomes larger. Then, the valve element 25 is separated from the valve seat portion 27 against the urging force of the coil spring 26, so that the space between the first communication path 21 and the second communication path 22 is opened. Accordingly, the first suction operation state in which only the oil in the oil bath 2 is sucked from the suction pipe 30 according to the suction pressure of the oil in the oil bath 2 by the oil pump 10, and the oil in the oil bath 2 from the suction pipe 30 is discharged. The second suction operation state in which air is sucked and air is sucked from the air suction valve 20 is switched.

第１吸込作動状態では、オイルポンプ１０の運転により、吸込管３０からオイルのみが吸入され、空気吸入バルブ２０から空気は吸入されない。この第１吸込作動状態では、オイルポンプ１０に空気が吸い込まれないことで、オイルポンプ１０の回転数にほぼ正比例する線形的なオイル流量の増加が得られる。第２吸込作動状態では、オイルポンプ１０の運転により、吸込管３０からオイルが吸入されると共に空気吸入バルブ２０から空気が吸入される。空気吸入バルブ２０から吸入された空気がオイルポンプ１０内へ混入することで、（空気が混入しない状態と比較して）ポンプ負圧とポンプ駆動力の増加がより低く抑えられる。すなわち、本実施形態のオイル吸入装置１では、この空気混入によって、オイルポンプ１０へ吸入するオイルに空気を混入させることでオイル吸入量を制限し、オイルポンプ１０の油圧動力を低減させることができる。このように、空気吸入バルブ２０から吸入する空気をオイルバス２から吸入するオイルに混入させることによって、特に高回転領域でのオイルポンプ１０の回転数に対するオイル吸入量を低く抑えることができ、オイルポンプ１０の駆動損失を効果的に低減することができる。   In the first suction operation state, only the oil is sucked from the suction pipe 30 and the air is not sucked from the air suction valve 20 by the operation of the oil pump 10. In the first suction operation state, since air is not sucked into the oil pump 10, a linear increase in the oil flow rate that is substantially directly proportional to the rotational speed of the oil pump 10 is obtained. In the second suction operation state, oil is sucked from the suction pipe 30 and air is sucked from the air suction valve 20 by the operation of the oil pump 10. Since the air sucked from the air suction valve 20 is mixed into the oil pump 10, the increase in the pump negative pressure and the pump driving force can be suppressed to a lower level (compared to a state where no air is mixed). In other words, in the oil suction device 1 of the present embodiment, the amount of oil suction can be limited by mixing air into the oil sucked into the oil pump 10 by this air mixing, and the hydraulic power of the oil pump 10 can be reduced. . In this way, by mixing the air sucked from the air suction valve 20 into the oil sucked from the oil bath 2, the oil suction amount with respect to the rotation speed of the oil pump 10 can be kept low particularly in the high speed region. The driving loss of the pump 10 can be effectively reduced.

図４乃至図６は、本実施形態のオイル吸入装置１と従来構成のオイル吸入装置との性能比較について説明するための図で、図４は、オイルポンプ１０の回転数（入力回転数）とポンプ吸入圧力の関係を示すグラフであり、図５は、オイルポンプ１０の回転数とポンプトルクの関係を示すグラフであり、図６は、オイルポンプ１０の回転数とポンプ流量の関係を示すグラフである。図５及び図６のグラフでは、従来構成のオイル吸入装置のラインを実線で示し、本実施形態のオイル吸入装置１のラインを点線で示している。ここでの従来構成のオイル吸入装置とは、本実施形態の空気吸入バルブ２０を備えない構成である。   4 to 6 are diagrams for explaining the performance comparison between the oil suction device 1 of the present embodiment and the oil suction device of the conventional configuration, and FIG. 4 shows the rotation speed (input rotation speed) of the oil pump 10. FIG. 5 is a graph showing the relationship between the pump suction pressure, FIG. 5 is a graph showing the relationship between the rotational speed of the oil pump 10 and the pump torque, and FIG. 6 is a graph showing the relationship between the rotational speed of the oil pump 10 and the pump flow rate. It is. In the graphs of FIGS. 5 and 6, the line of the oil suction device having the conventional configuration is indicated by a solid line, and the line of the oil suction device 1 of the present embodiment is indicated by a dotted line. The oil suction device of the conventional configuration here is a configuration that does not include the air suction valve 20 of the present embodiment.

本実施形態のオイルポンプ１０では、図４に示すように、ポンプ回転数Ｎが規定回転数Ｎ１未満の領域では、ポンプ吸入圧力Ｐが所定圧（規定負圧）Ｐ１よりも大きい状態（Ｐ＞Ｐ１）であり、ポンプ回転数Ｎが規定回転数Ｎ１未満の領域では、ポンプ吸入圧力Ｐが規定圧力（規定負圧）Ｐ１以下（Ｐ≦Ｐ１）の負圧となる。したがって、ポンプ回転数Ｎが規定回転数Ｎ１未満の領域では、吸込管３０からオイルのみを吸入する第１吸込作動状態であり、ポンプ回転数Ｎが規定回転数Ｎ１以上の領域では、吸込管３０から吸入されたオイルに空気吸入バルブ２０から吸入された空気が混入する第２吸込作動状態（空気混入状態）となる。これにより、図５のグラフに示すように、規定回転数Ｎ１以上の高回転領域で、従来構成のオイル吸入装置と比較して、吸入されるオイル流量の増加を抑制する（増加率を低く抑える）ことができる。したがって、図６に示すように、ポンプトルクの低減効果が得られる。これにより、ポンプ損失及び伝達損失を低減させることができる。   In the oil pump 10 of the present embodiment, as shown in FIG. 4, in a region where the pump rotation speed N is less than the specified rotation speed N1, the pump suction pressure P is greater than a predetermined pressure (specified negative pressure) P1 (P>). In the region where the pump rotational speed N is less than the specified rotational speed N1, the pump suction pressure P is a negative pressure equal to or lower than the specified pressure (specified negative pressure) P1 (P ≦ P1). Accordingly, in the region where the pump rotational speed N is less than the specified rotational speed N1, the first suction operation state in which only oil is sucked from the suction pipe 30 is performed. In the region where the pump rotational speed N is equal to or higher than the specified rotational speed N1, the suction pipe 30 The second suction operation state (air mixing state) in which the air sucked from the air suction valve 20 is mixed into the oil sucked from the second suction state. As a result, as shown in the graph of FIG. 5, an increase in the flow rate of the sucked oil is suppressed (a rate of increase is kept low) as compared with the oil suction device of the conventional configuration in a high rotation speed region where the rotation speed is N1 or more. )be able to. Therefore, as shown in FIG. 6, an effect of reducing pump torque can be obtained. Thereby, pump loss and transmission loss can be reduced.

以上説明したように、本実施形態のオイル吸入装置１では、車両の駆動源から伝達された回転で駆動する機械式のオイルポンプ１０を備えるオイル吸入装置１において、オイルポンプ１０の吸入ポート１１に空気吸入バルブ２０を設けている。この空気吸入バルブ２０は、吸入ポート１１と連通する第１連通路２１と、大気側１００と連通する第２連通路２２と、第１連通路２１と第２連通路２２との間の開閉を有無を切り替え可能なバルブ機構（開閉機構）２３とを備え、オイルポンプ１０のオイル吸入圧力が所定圧以下の負圧になったときにバルブ機構２３が開くことで、オイルバス２から吸込管３０に吸入されたオイルに空気吸入バルブ２０で吸入された空気が混入されるように構成した。   As described above, in the oil suction device 1 of the present embodiment, in the oil suction device 1 including the mechanical oil pump 10 driven by the rotation transmitted from the drive source of the vehicle, the suction port 11 of the oil pump 10 is connected to the suction port 11 of the oil pump 10. An air intake valve 20 is provided. The air intake valve 20 opens and closes a first communication path 21 that communicates with the suction port 11, a second communication path 22 that communicates with the atmosphere side 100, and the first communication path 21 and the second communication path 22. A valve mechanism (opening / closing mechanism) 23 that can be switched between presence and absence is provided. When the oil suction pressure of the oil pump 10 becomes a negative pressure equal to or lower than a predetermined pressure, the valve mechanism 23 is opened, so that the suction pipe 30 from the oil bath 2 is opened. The air sucked in by the air suction valve 20 is mixed with the oil sucked in.

本実施形態のオイル吸入装置１では、オイルバス２のオイルがオイルポンプ１０に吸入されるまでの吸入区間に上記の空気吸入バルブ２０を設けたことで、オイルポンプ１０の吸入圧力が所定圧以下の負圧となったときに、当該空気吸入バルブ２０でオイルポンプ１０に空気を吸入させてその駆動トルクを低減させる構造としている。これにより、特に、規定回転数を越える高回転領域で余剰となっていた吐出量分のポンプ駆動トルクを低減させることができる。したがって、オイルポンプ１０に回転を伝達している駆動源の駆動トルクを低下させることができ、駆動源に与える損失を効果的に低減できる。   In the oil suction device 1 of the present embodiment, the air suction valve 20 is provided in the suction section until the oil in the oil bath 2 is sucked into the oil pump 10, so that the suction pressure of the oil pump 10 is less than a predetermined pressure. The air suction valve 20 causes the oil pump 10 to suck air and reduce its driving torque when the negative pressure is reached. Thereby, it is possible to reduce the pump driving torque corresponding to the discharge amount that is surplus particularly in the high rotation region exceeding the specified rotation speed. Therefore, the drive torque of the drive source transmitting rotation to the oil pump 10 can be reduced, and the loss given to the drive source can be effectively reduced.

このように、オイルバス２内のオイルがオイルポンプ１０に吸入されるまでの吸入区間に、オイルバス２内のオイルの吸入量と空気の吸入量との配分を可変させる（空気とオイルを吸い分ける）機構として、空気吸入バルブ２０を設けたことで、オイルポンプ１０に空気を吸入させることでその駆動トルクを意図的に低減させる構造としている。すなわち、オイルポンプ１０の吸入経路上に空気を吸い込むための手段を設けたことで、オイルポンプ１０の吸入圧力が所定以下の負圧のときに該オイルポンプ１０のオイルの余剰吸込量を規制することができ、オイルポンプ１０の駆動に必要なトルクを低減できるようにした。これにより、特に、規定回転数を越える高回転領域で余剰となっていた吐出量分のポンプ駆動トルクを低減させることができる。その結果、オイルポンプ１０を駆動しているエンジン（駆動源）の駆動トルクを効果的に低下させることができる。   In this manner, the distribution of the oil intake amount and the air intake amount in the oil bath 2 is varied in the intake section until the oil in the oil bath 2 is sucked into the oil pump 10 (air and oil are absorbed). As a mechanism, the air suction valve 20 is provided, so that the oil pump 10 sucks air to intentionally reduce the driving torque. That is, by providing a means for sucking air on the suction path of the oil pump 10, when the suction pressure of the oil pump 10 is a negative pressure below a predetermined value, the excess suction amount of oil in the oil pump 10 is regulated. The torque required for driving the oil pump 10 can be reduced. Thereby, it is possible to reduce the pump driving torque corresponding to the discharge amount that is surplus particularly in the high rotation region exceeding the specified rotation speed. As a result, the drive torque of the engine (drive source) driving the oil pump 10 can be effectively reduced.

また、上記のオイル吸入装置では、空気吸入バルブ２０は、第１連通路２１と第２連通路２２との間を開閉する弁体２５と、弁体２５を閉位置へ付勢するコイルスプリング（付勢手段）２６とを備え、オイルポンプ１０のオイル吸入圧力が所定以下の負圧になると、弁体２５にかかる力でコイルスプリング２６の付勢力に抗して弁体２５が閉位置から開位置へ移動するように構成している。 In the above oil suction device, the air suction valve 20 includes a valve body 25 that opens and closes between the first communication path 21 and the second communication path 22, and a coil spring that biases the valve body 25 to the closed position ( Urging means) 26, and when the oil suction pressure of the oil pump 10 becomes a predetermined negative pressure or less, the valve element 25 is opened from the closed position against the urging force of the coil spring 26 by the force applied to the valve element 25. It is configured to move to a position.

この構成によれば、部品点数を少なく抑えた簡単な構成で、オイルポンプ１０の吸入圧力が所定以上となったときに該オイルポンプ１０に空気を吸入させることができる。   According to this configuration, air can be sucked into the oil pump 10 when the suction pressure of the oil pump 10 exceeds a predetermined value with a simple configuration with a reduced number of parts.

以上本発明の実施形態を説明したが、本発明は上記実施形態に限定されるものではなく、特許請求の範囲、及び明細書と図面に記載された技術的思想の範囲内において種々の変形が可能である。例えば、上記実施形態の空気吸入バルブ２０の具体的な構造は一例であり、本発明にかかるオイル吸入装置が備える空気吸入部は、オイルポンプの吸入圧力に応じて開閉の切り替えが可能な構造であれば、上記の空気吸入バルブ２０のような構成には限らず、他の構造であってもよい。また、上記実施形態では、空気吸入バルブをオイルポンプの吸入ポートに設けた場合を示したが、本発明にかかる空気吸入部は、オイル貯留部のオイルがオイルポンプ（ポンプ部）に吸入されるまでの吸入区間に設けていれば、上記実施形態に示す以外の位置に設けてもよい。   Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. For example, the specific structure of the air suction valve 20 of the above embodiment is an example, and the air suction portion provided in the oil suction device according to the present invention has a structure that can be switched between open and closed according to the suction pressure of the oil pump. If so, the structure is not limited to the air intake valve 20 described above, and other structures may be used. In the above embodiment, the case where the air intake valve is provided in the intake port of the oil pump is shown. However, in the air intake portion according to the present invention, the oil in the oil storage portion is drawn into the oil pump (pump portion). As long as it is provided in the suction section up to this point, it may be provided at a position other than that shown in the above embodiment.

１ オイル吸入装置
２ オイルバス（オイル貯留部）
１０ オイルポンプ
１０ａ 吸込端
１０ｂ 吐出端
１１ 吸入ポート（吸入部）
１２ ケーシング
１３ 吐出ポート
１５ ポンプ部
１６ アウタロータ
１７ インナロータ
２０ 空気吸入バルブ（空気吸入部）
２１ 第１連通路
２２ 第２連通路
２３ バルブ機構（開閉機構）
２４ 収容部
２５ 弁体
２６ コイルスプリング（付勢手段）
２７ 弁座部
３０ 吸込管
６０ 吐出管
１００ 大気側
Ｎ ポンプ回転数
Ｎ１ 規定回転数
Ｐ ポンプ吸入圧力
Ｐ１ 規定（所定）圧力 1 Oil suction device 2 Oil bath (oil reservoir)
10 Oil pump 10a Suction end 10b Discharge end 11 Suction port (suction part)
12 Casing 13 Discharge port 15 Pump part 16 Outer rotor 17 Inner rotor 20 Air intake valve (air intake part)
21 First communication path 22 Second communication path 23 Valve mechanism (opening / closing mechanism)
24 accommodating part 25 valve body 26 coil spring (biasing means)
27 Valve seat 30 Suction pipe 60 Discharge pipe 100 Atmosphere side N Pump speed N1 Specified speed P Pump suction pressure P1 Specified (predetermined) pressure

Claims (2)

車両の駆動源から伝達された回転で駆動する機械式のポンプ部をケーシング内に具備するオイルポンプを備え、オイル貯留部のオイルを前記オイルポンプに吸入して圧送するオイル吸入装置であって、
前記オイル貯留部のオイルが前記オイルポンプの吸入部に吸入されるまでの吸入区間に設けた空気吸入部を備え、
前記空気吸入部は、大気側と連通する第１連通路と、前記オイルポンプの吸入部と連通する第２連通路と、前記第１連通路と前記第２連通路との間の開閉を切り替え可能な開閉機構と、を備え、
前記開閉機構は、前記第１連通路と前記第２連通路との間を開閉する弁体と、前記弁体を閉位置へ付勢する付勢手段と、を備え、
前記オイルポンプのオイル吸入圧力が所定圧以下の負圧になると、前記弁体が前記付勢手段の付勢力に抗して前記閉位置から開位置へ移動することで前記開閉機構が開き、前記オイル貯留部から吸込管に吸入されたオイルに前記空気吸入部から吸入された空気が混入されるように構成し、
前記ポンプ部、前記吸入部、前記空気吸入部、及び前記開閉機構を、前記オイルポンプのケーシング内に一体的に構成した
ことを特徴とする車両のオイル吸入装置。 An oil suction device that includes an oil pump having a mechanical pump unit driven by rotation transmitted from a drive source of a vehicle in a casing, and sucks oil from an oil storage unit into the oil pump and pumps it.
An air suction part provided in the suction section until the oil in the oil storage part is sucked into the suction part of the oil pump;
The air suction section switches between opening and closing between a first communication path communicating with the atmosphere side, a second communication path communicating with the suction section of the oil pump, and the first communication path and the second communication path. A possible opening and closing mechanism,
The opening / closing mechanism includes a valve body that opens and closes between the first communication path and the second communication path, and an urging unit that urges the valve body to a closed position,
Wherein the oil suction pressure of the oil pump becomes a negative pressure below a predetermined pressure, the opening and closing mechanism is opened by moving the valve body to the閉位placed RaHiraku position against the biasing force of the biasing means, The air sucked from the air suction part is mixed with the oil sucked into the suction pipe from the oil storage part,
An oil suction device for a vehicle, wherein the pump portion, the suction portion, the air suction portion, and the opening / closing mechanism are integrally formed in a casing of the oil pump. 前記ケーシング内に、前記ポンプ部からオイルを吐出管へ吐出するための吐出部を一体的に構成した
ことを特徴とする請求項１に記載の車両のオイル吸入装置。 The vehicle oil suction device according to claim 1, wherein a discharge portion for discharging oil from the pump portion to a discharge pipe is integrally formed in the casing.
JP2013116637A 2013-06-03 2013-06-03 Vehicle oil suction device Active JP5914414B2 (en)

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JP2013116637A JP5914414B2 (en) 2013-06-03 2013-06-03 Vehicle oil suction device
CN201410228841.8A CN104214091B (en) 2013-06-03 2014-05-27 The Oil sucking device of vehicle
US14/288,296 US20140356195A1 (en) 2013-06-03 2014-05-27 Oil suction device of vehicle

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