JP2011099547A - Oil sucking device of transmission - Google Patents

Oil sucking device of transmission Download PDF

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JP2011099547A
JP2011099547A JP2009256595A JP2009256595A JP2011099547A JP 2011099547 A JP2011099547 A JP 2011099547A JP 2009256595 A JP2009256595 A JP 2009256595A JP 2009256595 A JP2009256595 A JP 2009256595A JP 2011099547 A JP2011099547 A JP 2011099547A
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oil
passage
storage chamber
oil level
shift valve
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JP5167227B2 (en
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Kazunori Miyata
和典 宮田
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Honda Motor Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To reduce oil scraping-up resistance by a gear mechanism by optimizing an oil level height in a casing in a transmission. <P>SOLUTION: The oil sucking device 10 includes a machine chamber B storing the gear mechanism 2, an oil storage chamber A storing oil scraped up by the gear mechanism 2, a flow switch 22 detecting an oil level L2 of the machine chamber B, first and second oil passages 13, 23 respectively connecting the oil storage chamber A and the machine chamber B to an oil pump OP, and a shift valve 31 switching the first and second oil passages 13, 23 and making it communicate with the oil pump OP. When the oil level L2 of the machine chamber B is higher than or equal to a set height, the second oil passage 23 is selected by the shift valve 31, thereby making the machine chamber B communicated with the oil pump OP. When the oil level L2 of the machine chamber B is lower than the set height, the first oil passage 13 is selected by the shift valve 31, thereby making the oil storage chamber A communicate with the oil pump OP. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、変速機のケーシング内のオイルを吸入するためのオイルポンプを備えた変速機のオイル吸入装置に関する。   The present invention relates to an oil suction device for a transmission including an oil pump for sucking oil in a casing of the transmission.

従来、車両に搭載された自動変速機をはじめとする変速機には、ギヤ機構を収容するケーシング内のオイルを吸入するオイル吸入装置が設けられている。このようなオイル吸入装置では、車両の加減速時や旋回時にケーシング内のオイルが片寄ることで、ケーシング内の油面高さが変化する。それによって、ケーシング内の吸入口付近にオイルが無くなると、吸入口からエアを吸い込んでしまう場合がある。そうすると、オイルポンプで吸入したオイルに油圧の脈動や油圧の低下が起こり、変速ショックやクラッチの滑りが発生して、車両の乗り心地に影響が出るという問題がある。   2. Description of the Related Art Conventionally, transmissions such as an automatic transmission mounted on a vehicle are provided with an oil suction device that sucks oil in a casing that houses a gear mechanism. In such an oil suction device, the oil level in the casing changes due to the oil in the casing being offset when the vehicle is accelerating / decelerating or turning. As a result, if the oil runs out near the suction port in the casing, air may be sucked from the suction port. In this case, the oil sucked by the oil pump has a hydraulic pulsation or a hydraulic pressure drop, which causes a shift shock or clutch slippage, which affects the riding comfort of the vehicle.

しかしながら、変速機のオイルは、温度状態によって膨張率や粘度が著しく変化するので、高温状態と低温状態とでケーシング内の油面の高さが大きく変化する。そのため、油面が低下した状態で吸引口からエアを吸引しないように油量設定を行うと、油面が高くなったときに、ギヤやクラッチなどの回転部品がオイルに浸かってしまう。これにより、オイルの攪拌が起こり、該攪拌によるオイルの泡立ちが発生する。また、ギヤ機構の動作に対するフリクションが発生する。   However, since the expansion rate and viscosity of the transmission oil vary significantly depending on the temperature state, the oil level in the casing varies greatly between the high temperature state and the low temperature state. For this reason, when the oil amount is set so that air is not sucked from the suction port in a state where the oil level is lowered, rotating parts such as gears and clutches are immersed in the oil when the oil level becomes high. As a result, oil agitation occurs and oil bubbling occurs due to the agitation. In addition, friction occurs with respect to the operation of the gear mechanism.

そこで、ケーシング内の油面を低く抑えつつエアの吸い込みを防止するための従来技術として、特許文献１に記載のオイルストレーナがある。このオイルストレーナは、ウエイトの加速度に応じて変位することで吸入口の一部を閉鎖可能なふた部材を備えている。そして、所定以上の加速度でリザーバ内の油面が傾いた場合、ふた部材で吸入口の油面低下側部分が閉鎖されるようになっている。   Therefore, there is an oil strainer described in Patent Document 1 as a prior art for preventing air suction while keeping the oil level in the casing low. The oil strainer includes a lid member that can close a part of the suction port by being displaced according to the acceleration of the weight. When the oil level in the reservoir is inclined at a predetermined acceleration or higher, the oil level lowering side portion of the suction port is closed by the lid member.

特許文献１に記載のオイルストレーナでは、加減速や旋回を伴わない傾斜路の走行時には、ウエイトに加速度が発生しない。しかしながら、オイルリザーバの油面は、車両の加減速時や旋回時だけでなく坂道など傾斜路の走行時にも傾くため、そのような場合には、吸入口の開閉構造が機能しないという問題がある。また、特許文献１に記載のオイルストレーナでは、吸入口の開閉動作は、オイル粘度の影響を受けるが、オイル粘度は、油面高さ、オイル温度、ストレーナの吸込負圧などによって変化する。そのため、吸入口の開閉動作が常に適切に行われるように設定することは容易でない。   In the oil strainer described in Patent Document 1, acceleration is not generated in the weight when traveling on an inclined road without acceleration / deceleration or turning. However, the oil level of the oil reservoir is inclined not only during acceleration / deceleration or turning of the vehicle but also when traveling on an inclined road such as a slope, and in such a case, there is a problem that the opening / closing structure of the suction port does not function. . In the oil strainer described in Patent Document 1, the opening / closing operation of the suction port is affected by the oil viscosity, but the oil viscosity varies depending on the oil surface height, the oil temperature, the suction negative pressure of the strainer, and the like. Therefore, it is not easy to set so that the opening / closing operation of the suction port is always performed appropriately.

実公平７−８９２２号公報No. 7-8922

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、ケーシング内の油面高さの最適化を図ることで、ギヤ機構による動作フリクションを低減できる変速機のオイル吸入装置を提供することにある。   The present invention has been made in view of the above points, and an object of the present invention is to provide an oil intake device for a transmission that can reduce operation friction due to a gear mechanism by optimizing the oil level in the casing. There is to do.

上記課題を解決するため、本発明にかかる変速機のオイル吸入装置は、変速機（１）のケーシング（３）内に設けたギヤ機構（２）を収容する機械室（Ｂ）と、ギヤ機構（２）で掻き上げられたオイルを収容するオイル収容室（Ａ）と、機械室（Ｂ）の油面（Ｌ２）を検知するための油面検知手段（２２）と、ケーシング（３）内のオイルを吸入するためのオイルポンプ（ＯＰ）と、オイル収容室（Ａ）からオイルポンプ（ＯＰ）に繋がる第１油路（１３）と、機械室（Ｂ）からオイルポンプ（ＯＰ）に繋がる第２油路（２３）と、第１油路（１３）と第２油路（２３）を切り換えてオイルポンプ（ＯＰ）に連通させるシフトバルブ（３１）と、油面検知手段（２２）の検知信号に基づいてシフトバルブ（３１）の切り換えを制御する制御手段（５０）と、を備え、制御手段（５０）は、油面検知手段（２２）で検知した機械室（Ｂ）の油面（Ｌ２）が予め設定した所定高さ（設定高さ）以上の場合には、シフトバルブ（３１）で第２油路（２３）を選択して、機械室（Ｂ）をオイルポンプ（ＯＰ）に連通させ、機械室（Ｂ）の油面（Ｌ２）が上記の設定高さより低い場合には、シフトバルブ（３１）で第１油路（１３）を選択して、オイル収容室（Ａ）をオイルポンプ（ＯＰ）に連通させることを特徴とする。   In order to solve the above problems, an oil suction device for a transmission according to the present invention includes a machine chamber (B) that houses a gear mechanism (2) provided in a casing (3) of a transmission (1), and a gear mechanism. An oil storage chamber (A) for storing the oil scooped up in (2), an oil level detection means (22) for detecting the oil level (L2) of the machine chamber (B), and the casing (3) An oil pump (OP) for sucking in oil, a first oil passage (13) connected from the oil storage chamber (A) to the oil pump (OP), and a machine chamber (B) connected to the oil pump (OP) The second oil passage (23), the shift valve (31) for switching the first oil passage (13) and the second oil passage (23) to communicate with the oil pump (OP), and the oil level detection means (22) A controller that controls the switching of the shift valve (31) based on the detection signal. (50), and the control means (50) has an oil level (L2) of the machine room (B) detected by the oil level detection means (22) equal to or higher than a predetermined height (set height) set in advance. In this case, the second oil passage (23) is selected by the shift valve (31), the machine chamber (B) is communicated with the oil pump (OP), and the oil level (L2) of the machine chamber (B) is When the height is lower than the set height, the first oil passage (13) is selected by the shift valve (31), and the oil storage chamber (A) communicates with the oil pump (OP).

本発明にかかるオイル吸入装置によれば、油面検知手段で検知した機械室の油面が設定高さ以上の場合は、シフトバルブで第２油路を選択して、機械室をオイルポンプに連通させ、機械室の油面が設定高さよりも低い場合には、シフトバルブで第１油路を選択して、オイル収容室をオイルポンプに連通させる。これにより、ケーシング内の油面の高さをシフトバルブでコントロールすることができるので、ギヤ機構を収容した機械室の油面が設定高さ以上になることを抑制できる。したがって、ギヤ機構がオイルに浸ることを防ぐことができ、変速機内でのオイル攪拌抵抗（ギヤ機構による掻き上げ抵抗）を削減することができるので、変速機の動作フリクションを低減することが可能となる。   According to the oil suction device of the present invention, when the oil level of the machine room detected by the oil level detection means is equal to or higher than the set height, the second oil passage is selected by the shift valve, and the machine room is used as the oil pump. If the oil level of the machine chamber is lower than the set height, the first oil passage is selected by the shift valve and the oil storage chamber is communicated with the oil pump. Thereby, since the height of the oil level in a casing can be controlled with a shift valve, it can suppress that the oil level of the machine room which accommodated the gear mechanism becomes more than a setting height. Therefore, the gear mechanism can be prevented from being immersed in oil, and the oil agitation resistance (scraping resistance by the gear mechanism) in the transmission can be reduced, so that the operation friction of the transmission can be reduced. Become.

また、上記のオイル吸入装置では、第１油路（１３）と第２油路（２３）を連通する連通路（４１）と、連通路（４１）を遮断する遮断弁（４２）とをさらに備え、制御手段（５０）は、油面検知手段（２２）又はシフトバルブ（３１）に作動不良が発生したと判断したときは、遮断弁（４２）を開いて第１油路（１３）と第２油路（２３）を連通させるとよい。すなわち、油面検知手段又はシフトバルブに作動不良が発生した場合は、機械室の油面に基づいて機械室内のオイルを適正に吸入することが行えず、機械室の油面高さが設定以上に高くなってしまうおそれがある。したがって、そのような場合には、連通路を開くことでオイル収容室と機械室の両方からオイルを吸入し、オイル収容室と機械室の油面高さが等しくなるように調整する。これにより、油面検知手段又はシフトバルブに作動不良が発生した場合でも、機械室の油面が設定高さを大きく上回ることを回避できるので、ギヤ機構による掻き上げ抵抗が増大するなどの不都合を防止できる。   In the above oil suction device, the communication passage (41) communicating the first oil passage (13) and the second oil passage (23) and the shutoff valve (42) blocking the communication passage (41) are further provided. And the control means (50) opens the shut-off valve (42) and opens the first oil passage (13) when it is determined that a malfunction has occurred in the oil level detection means (22) or the shift valve (31). The second oil passage (23) may be communicated. In other words, if a malfunction occurs in the oil level detection means or the shift valve, the oil in the machine room cannot be properly drawn on the basis of the oil level in the machine room, and the oil level in the machine room exceeds the set level. May become high. Therefore, in such a case, by opening the communication passage, oil is sucked from both the oil storage chamber and the machine chamber, and the oil level in the oil storage chamber and the machine chamber is adjusted to be equal. As a result, even if a malfunction occurs in the oil level detection means or the shift valve, it is possible to avoid that the oil level in the machine room greatly exceeds the set height, so that the scraping resistance by the gear mechanism increases. Can be prevented.

また、この場合、オイル収容室（Ａ）の油面（Ｌ１）を検知する他の油面検知手段（１２）をさらに備え、制御手段（５０）は、当該他の油面検知手段（１２）で検知したオイル収容室（Ａ）の油面（Ｌ１）の高さに基づいて、機械室（Ｂ）の油面（Ｌ２）を検知する油面検知手段（２２）又はシフトバルブ（３１）に作動不良が発生したか否かを判断するとよい。これによれば、油面検知手段やシフトバルブに作動不良が発生した場合、当該作動不良をより適切に把握することが可能となる。したがって、機械室の油面が設定高さを上回ることを回避でき、ギヤ機構による掻き上げ抵抗が増大するなどの不都合をより効果的に防止できる。
なお、上記の括弧内の符号は、後述する実施形態の対応す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。 Further, in this case, the oil storage chamber (A) further includes another oil level detection means (12) for detecting the oil level (L1), and the control means (50) is provided with the other oil level detection means (12). Based on the height of the oil level (L1) of the oil storage chamber (A) detected in step 4, the oil level detection means (22) or shift valve (31) for detecting the oil level (L2) of the machine chamber (B). It may be determined whether a malfunction has occurred. According to this, when an operation failure occurs in the oil level detection means or the shift valve, the operation failure can be grasped more appropriately. Therefore, it is possible to avoid that the oil level of the machine room exceeds the set height, and it is possible to more effectively prevent inconveniences such as an increase in the scraping resistance by the gear mechanism.
In addition, the code | symbol in said parenthesis has shown the code | symbol of the corresponding component of embodiment mentioned later as an example of this invention.

本発明にかかる変速機のオイル吸入装置によれば、ケーシング内の油面高さの最適化を図ることで、ギヤ機構のオイル掻き上げを抑制して、変速機の動作フリクションを低減することができる。   According to the oil suction device for a transmission according to the present invention, by optimizing the oil level in the casing, it is possible to suppress the oil scraping of the gear mechanism and reduce the operation friction of the transmission. it can.

本発明の一実施形態にかかる変速機の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 of the transmission concerning one Embodiment of this invention. オイル吸入装置の動作を説明するための一覧表である。It is a list for demonstrating operation | movement of an oil suction device.

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備えた変速機を示す概略図である。同図に示す変速機１は、複数のギヤを備えたギヤ機構２と、該ギヤ機構２を含む変速機１の構成部品を収容するケーシング３とを備えている。ギヤ機構２は、エンジン（図示せず）からの回転が入力される入力軸６ａと、入力軸６ａに対して平行に配置された第１出力軸６ｂ、第２出力軸６ｃ、デファレンシャル軸６ｄを備えており、変速段を形成するための各種のギヤやクラッチがこれら各軸６の周りに設置されている。なお、図１では、ケーシング３内のギヤ機構２以外の構成部品は、図示を省略している。   Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic view showing a transmission including an oil suction device according to an embodiment of the present invention. A transmission 1 shown in FIG. 1 includes a gear mechanism 2 having a plurality of gears, and a casing 3 that houses components of the transmission 1 including the gear mechanism 2. The gear mechanism 2 includes an input shaft 6a to which rotation from an engine (not shown) is input, a first output shaft 6b, a second output shaft 6c, and a differential shaft 6d that are arranged in parallel to the input shaft 6a. And various gears and clutches for forming a gear position are provided around the shafts 6. In FIG. 1, the components other than the gear mechanism 2 in the casing 3 are not shown.

ケーシング３の内部は、ギヤ機構２が収容された機械室Ｂと、ギヤ機構２で掻き上げられたオイルを収容するオイル収容室Ａとの二室に分割されている。オイル収容室Ａと機械室Ｂは、ケーシング３内の下壁３ａから上方へ延びる平板状の仕切壁４で仕切られている。また、オイル収容室Ａは、機械室Ｂの横幅よりも狭く設定されており、機械室Ｂ内に設置したギヤ機構２の側部（各軸６の側部）において、ケーシング３の側壁３ｂとの間に配置されている。ギヤ機構２に供給された潤滑用のオイル（作動油）及び機械室Ｂの底部に溜まったオイルは、各ギヤの回転で掻き上げられる。この掻き上げられたオイルは、図１の点線で示すような経路を辿ってオイル収容室Ａに収容されるようになっている。   The inside of the casing 3 is divided into two chambers: a machine chamber B in which the gear mechanism 2 is accommodated, and an oil chamber A in which the oil scraped up by the gear mechanism 2 is accommodated. The oil storage chamber A and the machine chamber B are partitioned by a flat partition wall 4 extending upward from the lower wall 3 a in the casing 3. The oil storage chamber A is set to be narrower than the lateral width of the machine room B, and the side wall 3b of the casing 3 and the side of the gear mechanism 2 installed in the machine room B (sides of the shafts 6) It is arranged between. The lubricating oil (operating oil) supplied to the gear mechanism 2 and the oil accumulated at the bottom of the machine chamber B are scraped up by the rotation of each gear. The oil thus scooped up is accommodated in the oil accommodating chamber A along a route shown by a dotted line in FIG.

オイル収容室Ａには、オイル収容室Ａ内の油面Ｌ１を検知するための第１フロースイッチ（他の油面検知手段）１２が設けられている。第１フロースイッチ１２は、オイル収容室Ａの油面Ｌ１が予め設定した所定高さ（以下、「設定高さ」という。）以上になるとこれを検知することができる。以下の説明では、オイル収容室Ａの油面Ｌ１が設定高さ以上である場合には、第１フロースイッチ１２がＯＮとなり、オイル収容室Ａの油面Ｌ１が設定高さ未満である場合には、第１フロースイッチ１２がＯＦＦとなるものとする。また、機械室Ｂには、機械室Ｂ内の油面Ｌ２を検知するための第２フロースイッチ（油面検知手段）２２が設けられている。第２フロースイッチ２２は、機械室Ｂの油面Ｌ２が設定高さ以上になるとこれを検知することができる。以下の説明では、機械室Ｂの油面Ｌ２が設定高さ以上である場合には、第２フロースイッチ２２がＯＮとなり、機械室Ｂの油面Ｌ２が設定高さ未満である場合には、第２フロースイッチ２２がＯＦＦとなる。なお、本発明にかかる油面検知手段の具体的な構成としては、上記の第１、第２フロースイッチ１２，２２には限らず、センサなど他の機構の油面検知手段であってもよい。   The oil storage chamber A is provided with a first flow switch (other oil level detection means) 12 for detecting the oil level L1 in the oil storage chamber A. The first flow switch 12 can detect this when the oil level L1 of the oil storage chamber A is equal to or higher than a predetermined height set in advance (hereinafter referred to as “set height”). In the following description, when the oil level L1 of the oil storage chamber A is equal to or higher than the set height, the first flow switch 12 is turned on and the oil level L1 of the oil storage chamber A is less than the set height. Assume that the first flow switch 12 is turned off. The machine room B is provided with a second flow switch (oil level detection means) 22 for detecting the oil level L2 in the machine room B. The second flow switch 22 can detect this when the oil level L2 of the machine room B exceeds the set height. In the following description, when the oil level L2 of the machine room B is equal to or higher than the set height, the second flow switch 22 is turned ON, and when the oil level L2 of the machine room B is less than the set height, The second flow switch 22 is turned off. The specific configuration of the oil level detection means according to the present invention is not limited to the first and second flow switches 12 and 22 described above, and may be an oil level detection means of another mechanism such as a sensor. .

そして、本実施形態のオイル吸入装置１０は、ケーシング３内のオイルを吸入するためのオイルポンプＯＰと、オイル収容室ＡからオイルポンプＯＰに繋がる第１油路１３と、機械室ＢからオイルポンプＯＰに繋がる第２油路２３と、第１油路１３と第２油路２３を切り換えてオイルポンプＯＰに連通させるシフトバルブ３１とを備えている。また、第１油路１３と第２油路２３におけるシフトバルブ３１の上流側には、オイルストレーナ３５が設置されている。本実施形態では、第１油路１３と第２油路２３は、共通のオイルストレーナ３５を通過するように構成されている。なお、図１では、オイルポンプＯＰやオイルストレーナ３５をケーシング３の外部で模式的に図示しているが、実際の変速機１では、オイルポンプＯＰやオイルストレーナ３５がケーシング３内に配置されていてもよい。   The oil suction device 10 of the present embodiment includes an oil pump OP for sucking oil in the casing 3, a first oil passage 13 connected from the oil storage chamber A to the oil pump OP, and an oil pump from the machine chamber B. A second oil passage 23 connected to the OP and a shift valve 31 that switches the first oil passage 13 and the second oil passage 23 to communicate with the oil pump OP are provided. An oil strainer 35 is installed on the upstream side of the shift valve 31 in the first oil passage 13 and the second oil passage 23. In the present embodiment, the first oil passage 13 and the second oil passage 23 are configured to pass through a common oil strainer 35. In FIG. 1, the oil pump OP and the oil strainer 35 are schematically illustrated outside the casing 3, but in the actual transmission 1, the oil pump OP and the oil strainer 35 are disposed in the casing 3. May be.

また、オイルポンプＯＰで吸入されたオイルは、変速機１が備える図示しない制御ボディなどの油圧回路に供給されて、バルブ機構などを作動するための作動油圧として用いられる。また、ギヤ機構２が備える回転軸を支持する軸受部分などに潤滑用のオイルとして供給される。そして、ギヤ機構２に供給された潤滑用のオイルは、各ギヤで掻きあげられてオイル収容室Ａに収容されるほか、ギヤ機構２から流下して機械室Ｂの底部に溜まるようになっている。   The oil sucked by the oil pump OP is supplied to a hydraulic circuit such as a control body (not shown) provided in the transmission 1 and used as an operating hydraulic pressure for operating a valve mechanism and the like. Further, the oil is supplied as lubricating oil to a bearing portion or the like that supports the rotating shaft of the gear mechanism 2. The lubricating oil supplied to the gear mechanism 2 is scraped up by each gear and stored in the oil storage chamber A, and flows down from the gear mechanism 2 and accumulates at the bottom of the machine chamber B. Yes.

シフトバルブ３１は、第１入力ポート３１ａと第２入力ポート３１ｂの２個の入力ポートと、1個の出力ポート３１ｃを備えている。そして、第１油路１３の下流端が第１入力ポート３１ａに接続されており、第２油路２３の下流端が第２入力ポート３１ｂに接続されている。また、出力ポート３１ｃは、油路３４を介してオイルポンプＯＰに接続されている。このシフトバルブ３１では、三方弁（ソレノイド弁）４０による作動油の供給切り換えに応じてスプール３１ｄが移動することで、第１入力ポート３１ａと第２入力ポート３１ｂが交代で出力ポート３１ｃに繋がるようになっている。これにより、オイル収容室Ａと機械室Ｂを選択的にオイルポンプＯＰに連通させることができる。   The shift valve 31 includes two input ports, a first input port 31a and a second input port 31b, and one output port 31c. The downstream end of the first oil passage 13 is connected to the first input port 31a, and the downstream end of the second oil passage 23 is connected to the second input port 31b. The output port 31c is connected to the oil pump OP via the oil passage 34. In this shift valve 31, the spool 31d moves in response to the switching of hydraulic oil supply by the three-way valve (solenoid valve) 40 so that the first input port 31a and the second input port 31b are alternately connected to the output port 31c. It has become. Thereby, the oil storage chamber A and the machine chamber B can be selectively communicated with the oil pump OP.

なお、以下の説明では、三方弁４０がＯＮのとき、シフトバルブ３１のスプール３１ｄが図１の右側に移動して、第１入力ポート３１ａと出力ポート３１ｃが連通する。これにより、オイル収容室ＡがオイルポンプＯＰに連通する。一方、三方弁４０がＯＦＦのとき、シフトバルブ３１のスプール３１ｄが図１の左側に移動して、第２入力ポート３１ｂと出力ポート３１ｃが連通する。これにより、機械室ＢがオイルポンプＯＰに連通する。   In the following description, when the three-way valve 40 is ON, the spool 31d of the shift valve 31 moves to the right side in FIG. 1, and the first input port 31a and the output port 31c communicate with each other. Thereby, the oil storage chamber A communicates with the oil pump OP. On the other hand, when the three-way valve 40 is OFF, the spool 31d of the shift valve 31 moves to the left side of FIG. 1, and the second input port 31b and the output port 31c communicate with each other. Thereby, the machine room B communicates with the oil pump OP.

また、本実施形態のオイル吸入装置１０には、第１油路１３と第２油路２３とを連通する連通路４１と、連通路４１を遮断する遮断弁４２とが設けられている。連通路４１は、オイル収容室Ａと機械室Ｂの下流側、かつ、シフトバルブ３１及びオイルストレーナ３５の上流側で第１油路１３と第２油路２３を連通している。遮断弁４２は、通常時は連通路４１を遮断している開閉弁であって、後述するＥＣＵ５０からの指令に応じて連通路４１を開くことで、第１油路１３と第２油路２３を連通させることができる。   Further, the oil suction device 10 of the present embodiment is provided with a communication passage 41 that communicates the first oil passage 13 and the second oil passage 23 and a shut-off valve 42 that blocks the communication passage 41. The communication passage 41 communicates the first oil passage 13 and the second oil passage 23 on the downstream side of the oil storage chamber A and the machine chamber B and on the upstream side of the shift valve 31 and the oil strainer 35. The shut-off valve 42 is an on-off valve that normally shuts off the communication passage 41, and opens the communication passage 41 in response to a command from the ECU 50 described later, whereby the first oil passage 13 and the second oil passage 23 are opened. Can be communicated.

また、オイル吸入装置１０は、三方弁４０及び遮断弁４２の動作を制御するためのＥＣＵ（制御手段）５０を備えている。ＥＣＵ５０には、第１フロースイッチ１２及び第２フロースイッチ２２の検知信号が入力されるようになっている。また、ＥＣＵ５０は、三方弁４０及び遮断弁４２に対してそれぞれ制御信号を出力するようになっている。したがって、ＥＣＵ５０は、第１フロースイッチ１２及び第２フロースイッチ２２の検知信号に基づいて、三方弁４０によるシフトバルブ３１の切り換えを制御する。また、第１フロースイッチ１２及び第２フロースイッチ２２の検知信号に基づいて、遮断弁４２による第１油路１３と第２油路２３の連通・非連通の切り換えを制御する。   The oil suction device 10 also includes an ECU (control means) 50 for controlling the operations of the three-way valve 40 and the shutoff valve 42. The ECU 50 receives detection signals from the first flow switch 12 and the second flow switch 22. Further, the ECU 50 outputs control signals to the three-way valve 40 and the shutoff valve 42, respectively. Therefore, the ECU 50 controls the switching of the shift valve 31 by the three-way valve 40 based on the detection signals of the first flow switch 12 and the second flow switch 22. Further, based on the detection signals of the first flow switch 12 and the second flow switch 22, the switching of communication between the first oil passage 13 and the second oil passage 23 by the shutoff valve 42 is controlled.

次に、上記構成のオイル吸入装置１０の動作について説明する。図２は、オイル吸入装置１０の動作を説明するための一覧表である。この一覧表では、エンジン及び変速機１の始動時又は運転時（定常運転時）におけるオイル収容室Ａと機械室Ｂの油面状態、第１、第２フロースイッチ１２，２２のＯＮ／ＯＦＦ、三方弁４０のＯＮ／ＯＦＦ及びそれに基づくシフトバルブ３１の状態、遮断弁４２のＯＮ／ＯＦＦ及びそれに基づくオイルポンプＯＰへの吸入油路の連通状態を示している。なお、油面状態の欄に示す点線は、オイル収容室Ａの油面Ｌ１及び機械室ＢのＬ２の設定高さである。ここでは、油面Ｌ１，Ｌ２の設定高さが同一になっているが、実際には、オイル収容室Ａの油面Ｌ１の設定高さと、機械室Ｂの油面Ｌ２の設定高さは互いに異なっていてもよい。   Next, the operation of the oil suction device 10 configured as described above will be described. FIG. 2 is a list for explaining the operation of the oil suction device 10. In this list, the oil level of the oil storage chamber A and the machine chamber B when the engine and the transmission 1 are started or operated (steady operation), ON / OFF of the first and second flow switches 12 and 22, The ON / OFF state of the three-way valve 40 and the state of the shift valve 31 based on the ON / OFF state, the ON / OFF state of the shut-off valve 42, and the communication state of the intake oil passage to the oil pump OP based on the ON / OFF state are shown. In addition, the dotted line shown in the column of an oil surface state is the set height of the oil surface L1 of the oil storage chamber A and L2 of the machine chamber B. Here, the set heights of the oil surfaces L1 and L2 are the same, but actually, the set height of the oil surface L1 of the oil storage chamber A and the set height of the oil surface L2 of the machine chamber B are mutually different. May be different.

まず、オイル吸入装置１０の各部が正常状態（第１、第２フロースイッチ１２，２２、三方弁４０及びシフトバルブ３１のいずれにも作動不良が生じていない状態をいう、以下同じ。）の場合における動作について説明する。   First, when each part of the oil suction device 10 is in a normal state (which means a state in which no malfunction occurs in any of the first and second flow switches 12, 22, the three-way valve 40 and the shift valve 31, the same applies hereinafter). The operation in will be described.

図２の表の最上段に示すように、エンジン及び変速機１の始動時において、オイル収容室Ａの油面Ｌ１が設定高さよりも高くなっており、かつ、機械室Ｂの油面Ｌ２が設定高さよりも低くなっている場合は、第１フロースイッチ１２がＯＮとなり、第２フロースイッチ２２がＯＦＦとなる。したがって、三方弁４０がＯＮとなり、シフトバルブ３１が第１油路１３側（オイル収容室Ａ側）に開かれる。これにより、オイル収容室ＡがオイルポンプＯＰに連通した状態となり、オイル収容室Ａのオイルが吸入される。なおこのときは、遮断弁４２はＯＦＦ（閉）になっており、第１油路１３と第２油路２３は連通していないため、機械室Ｂのオイルの吸入は行われない。   2, when the engine and transmission 1 are started, the oil level L1 of the oil chamber A is higher than the set height, and the oil level L2 of the machine room B is When the height is lower than the set height, the first flow switch 12 is turned on and the second flow switch 22 is turned off. Accordingly, the three-way valve 40 is turned ON, and the shift valve 31 is opened to the first oil passage 13 side (oil storage chamber A side). As a result, the oil storage chamber A communicates with the oil pump OP, and the oil in the oil storage chamber A is sucked. At this time, the shutoff valve 42 is OFF (closed), and the first oil passage 13 and the second oil passage 23 are not in communication with each other, so that the oil in the machine chamber B is not sucked.

一方、一覧表の上から二段目に示すように、エンジン及び変速機１の運転時（定常運転時）において、オイル収容室Ａの油面Ｌ１が設定高さよりも低くなっており、かつ、機械室Ｂの油面Ｌ２が設定高さよりも高くなっている場合は、第１フロースイッチ１２がＯＦＦとなり、第２フロースイッチ２２がＯＮとなる。したがって、三方弁４０がＯＦＦとなり、シフトバルブ３１が第２油路２３側（機械室Ｂ側）に開かれる。これにより、機械室ＢがオイルポンプＯＰに連通した状態となり、機械室Ｂのオイルが吸入される。なお、このときも、遮断弁４２はＯＦＦ（閉）になっており、第１油路１３と第２油路２３は連通していないため、オイル収容室Ａのオイルの吸入は行われない。   On the other hand, as shown in the second stage from the top of the list, during operation of the engine and transmission 1 (during steady operation), the oil level L1 of the oil storage chamber A is lower than the set height, and When the oil level L2 of the machine room B is higher than the set height, the first flow switch 12 is turned off and the second flow switch 22 is turned on. Therefore, the three-way valve 40 is turned OFF, and the shift valve 31 is opened to the second oil passage 23 side (machine room B side). As a result, the machine room B communicates with the oil pump OP, and the oil in the machine room B is sucked. At this time as well, the shutoff valve 42 is OFF (closed), and the first oil passage 13 and the second oil passage 23 are not in communication, so that the oil in the oil storage chamber A is not sucked.

このように、本実施形態のオイル吸入装置１０では、機械室Ｂの油面Ｌ２が設定高さ以上の場合は、シフトバルブ３１で第２油路２３を選択して、機械室ＢをオイルポンプＯＰに連通させ、機械室Ｂの油面Ｌ２が設定高さよりも低い場合は、シフトバルブ３１で第１油路１３を選択して、オイル収容室ＡをオイルポンプＯＰに連通させるようにした。これにより、ギヤ機構２を設置した機械室Ｂの油面Ｌ２の高さをシフトバルブ３１の切り換えでコントロールできるため、ギヤ機構２による掻き上げ抵抗を削減することが可能となる。したがって、変速機１内でのオイルの攪拌抵抗を削減でき、動作フリクションを低減することが可能となる。   As described above, in the oil suction device 10 of the present embodiment, when the oil level L2 of the machine room B is equal to or higher than the set height, the second oil passage 23 is selected by the shift valve 31 and the machine room B is oil pumped. When the oil level L2 of the machine chamber B is lower than the set height, the first oil passage 13 is selected by the shift valve 31 so that the oil storage chamber A is communicated with the oil pump OP. Thereby, since the height of the oil level L2 of the machine room B in which the gear mechanism 2 is installed can be controlled by switching the shift valve 31, it is possible to reduce the scraping resistance by the gear mechanism 2. Therefore, the oil agitation resistance in the transmission 1 can be reduced, and the operation friction can be reduced.

次に、オイル吸入装置１０の各部のいずれかが故障状態（第１、第２フロースイッチ１２，２２、三方弁４０及びシフトバルブ３１のいずれかに作動不良が生じている状態をいう、以下同じ。）の場合における動作について説明する。   Next, any part of the oil suction device 10 is in a failure state (a state in which any one of the first and second flow switches 12, 22, the three-way valve 40 and the shift valve 31 is malfunctioning, the same applies hereinafter) )) Will be described.

まず、エンジン及び変速機１の運転時に第１フロースイッチ１２にＯＮ故障（ＯＮ固着状態となる故障をいう、以下同じ。）が発生した場合を説明する。この場合は、一覧表の上から三段目に示すように、機械室Ｂの油面Ｌ２が設定高さよりも高くなっていることで、第２フロースイッチ２２がＯＮとなる。その一方で、オイル収容室Ａの油面Ｌ１が設定高さよりも低くなっているにも関わらず、第１フロースイッチ１２がＯＮとなる。このように、運転時に第１、第２フロースイッチ１２，２２の両方がＯＮになっている場合は、ＥＣＵ５０は、第１フロースイッチ１２にＯＮ故障が生じていると判断する。ＥＣＵ５０は、この判断に基づいて、遮断弁４２を開き（ＯＮ）、第１油路１３と第２油路２３を連通させる。第１油路１３と第２油路２３が連通すると、オイルポンプＯＰでオイル収容室Ａと機械室Ｂの両方からオイルが吸入されるようになるので、オイル収容室Ａの油面Ｌ１の高さと機械室Ｂの油面Ｌ２の高さが次第に同一になる。したがって、オイル収容室Ａの油面Ｌ１と機械室Ｂの油面Ｌ２のいずれかが設定高さを大幅に越えることを防止できる。   First, a description will be given of a case where an ON failure (referred to as a failure that becomes an ON-fixed state, hereinafter the same) occurs in the first flow switch 12 during operation of the engine and transmission 1. In this case, as shown in the third row from the top of the list, the oil level L2 of the machine room B is higher than the set height, so that the second flow switch 22 is turned on. On the other hand, although the oil level L1 of the oil storage chamber A is lower than the set height, the first flow switch 12 is turned on. As described above, when both the first and second flow switches 12 and 22 are ON during operation, the ECU 50 determines that an ON failure has occurred in the first flow switch 12. Based on this determination, the ECU 50 opens the shut-off valve 42 (ON) and causes the first oil passage 13 and the second oil passage 23 to communicate with each other. When the first oil passage 13 and the second oil passage 23 communicate with each other, oil is sucked from both the oil storage chamber A and the machine chamber B by the oil pump OP, so that the oil level L1 of the oil storage chamber A is high. The height of the oil level L2 of the machine room B becomes gradually the same. Therefore, it is possible to prevent any one of the oil level L1 of the oil storage chamber A and the oil level L2 of the machine chamber B from significantly exceeding the set height.

また、エンジン及び変速機１の運転時に第２フロースイッチ２２にＯＦＦ故障（ＯＦＦ固着した状態となる故障をいう、以下同じ。）が発生した場合を説明する。この場合は、一覧表の上から四段目に示すように、オイル収容室Ａの油面Ｌ１が設定高さよりも低くなっていることで、第１フロースイッチ１２がＯＦＦとなる。その一方で、機械室Ｂの油面Ｌ２が設定高さよりも高くなっているにもかかわらず、第２フロースイッチ２２がＯＦＦとなる。このように、運転時に第１、第２フロースイッチ１２，２２の両方がＯＦＦになっている場合は、ＥＣＵ５０は、第２フロースイッチ２２にＯＦＦ故障が生じていると判断する。ＥＣＵ５０は、この判断に基づいて、遮断弁４２を開き（ＯＮ）、第１油路１３と第２油路２３を連通させる。第１油路１３と第２油路２３が連通すると、オイルポンプＯＰでオイル収容室Ａと機械室Ｂの両方からオイルが吸入されるようになる。   Further, a case will be described in which an OFF failure (a failure in which the second flow switch 22 is stuck to the OFF state, the same applies hereinafter) occurs in the operation of the engine and the transmission 1. In this case, as shown in the fourth row from the top of the list, the first flow switch 12 is turned off because the oil level L1 of the oil storage chamber A is lower than the set height. On the other hand, although the oil level L2 of the machine room B is higher than the set height, the second flow switch 22 is turned off. As described above, when both the first and second flow switches 12 and 22 are OFF during operation, the ECU 50 determines that an OFF failure has occurred in the second flow switch 22. Based on this determination, the ECU 50 opens the shut-off valve 42 (ON) and causes the first oil passage 13 and the second oil passage 23 to communicate with each other. When the first oil passage 13 and the second oil passage 23 communicate with each other, oil is sucked from both the oil storage chamber A and the machine chamber B by the oil pump OP.

次に、エンジン及び変速機１の始動時において、三方弁４０にＯＦＦ故障が発生した場合を説明する。この場合、一覧表の五段目に示すように、オイル収容室Ａの油面Ｌ１が設定高さよりも高くなっており、機械室Ｂの油面Ｌ２が設定高さよりも低くなっていることで、第１フロースイッチ１２がＯＮとなり、第２フロースイッチ２２がＯＦＦとなる。したがって、本来であれば、三方弁４０がＯＮとなり、シフトバルブ３１が第１油路１３側（オイル収容室Ａ側）に開かれるところ、三方弁４０にＯＦＦ故障が発生しているため、シフトバルブ３１が第２油路２３側（機械室Ｂ側）に開かれる。これにより、ＥＣＵ５０は、三方弁４０にＯＦＦ故障が生じていると判断する。ＥＣＵ５０は、この判断に基づいて、遮断弁４２を開き（ＯＮ）、第１油路１３と第２油路２３を連通させる。第１油路１３と第２油路２３が連通すると、オイルポンプＯＰでオイル収容室Ａと機械室Ｂの両方からオイルが吸入されるようになる。   Next, a case where an OFF failure has occurred in the three-way valve 40 when the engine and the transmission 1 are started will be described. In this case, as shown in the fifth row of the list, the oil level L1 of the oil storage chamber A is higher than the set height, and the oil level L2 of the machine chamber B is lower than the set height. The first flow switch 12 is turned on and the second flow switch 22 is turned off. Therefore, if the three-way valve 40 is originally turned on and the shift valve 31 is opened to the first oil passage 13 side (oil storage chamber A side), an OFF failure has occurred in the three-way valve 40, so that The valve 31 is opened to the second oil passage 23 side (machine room B side). Thereby, the ECU 50 determines that an OFF failure has occurred in the three-way valve 40. Based on this determination, the ECU 50 opens the shut-off valve 42 (ON) and causes the first oil passage 13 and the second oil passage 23 to communicate with each other. When the first oil passage 13 and the second oil passage 23 communicate with each other, oil is sucked from both the oil storage chamber A and the machine chamber B by the oil pump OP.

また、エンジン及び変速機１の運転時において、三方弁４０にＯＮ故障が発生した場合を説明する。この場合、一覧表の最下段に示すように、オイル収容室Ａの油面Ｌ１が設定高さよりも低くなっており、機械室Ｂの油面Ｌ２が設定高さよりも高くなっていることで、第１フロースイッチ１２がＯＦＦとなり、第２フロースイッチ２２がＯＮとなる。したがって、本来であれば、三方弁４０がＯＦＦとなり、シフトバルブ３１が第２油路２３側（機械室Ｂ側）に開かれるところ、ここでは、三方弁４０にＯＮ故障が発生しているため、シフトバルブ３１が第１油路１３側（オイル収容室Ａ側）に開かれる。これにより、ＥＣＵ５０は、三方弁４０にＯＮ故障が生じていると判断する。ＥＣＵ５０は、この判断に基づいて、遮断弁４２を開き（ＯＮ）、第１油路１３と第２油路２３を連通させる。第１油路１３と第２油路２３が連通すると、オイルポンプＯＰでオイル収容室Ａと機械室Ｂの両方からオイルが吸入されるようになるので、オイル収容室Ａの油面の高さＬ１と機械室Ｂの油面の高さＬ２が次第に同一になる。   A case where an ON failure has occurred in the three-way valve 40 during operation of the engine and the transmission 1 will be described. In this case, as shown at the bottom of the list, the oil level L1 of the oil storage chamber A is lower than the set height, and the oil level L2 of the machine room B is higher than the set height. The first flow switch 12 is turned off and the second flow switch 22 is turned on. Therefore, originally, the three-way valve 40 is turned OFF and the shift valve 31 is opened to the second oil passage 23 side (machine room B side). Here, an ON failure has occurred in the three-way valve 40. The shift valve 31 is opened to the first oil passage 13 side (oil storage chamber A side). Thereby, the ECU 50 determines that an ON failure has occurred in the three-way valve 40. Based on this determination, the ECU 50 opens the shut-off valve 42 (ON) and causes the first oil passage 13 and the second oil passage 23 to communicate with each other. When the first oil passage 13 and the second oil passage 23 communicate with each other, oil is sucked from both the oil storage chamber A and the machine chamber B by the oil pump OP, so that the height of the oil surface of the oil storage chamber A is increased. The height L2 of the oil level of L1 and the machine room B becomes gradually the same.

このように、本実施形態のオイル吸入装置１０では、第１油路１３と第２油路２３とを連通する連通路４１と、連通路４１を遮断する遮断弁４２とを備え、ＥＣＵ５０は、第１、第２フロースイッチ１２，２２、又は三方弁４０（シフトバルブ３１）に作動不良が発生したと判断したときは、遮断弁４２を開いて第１油路１３と第２油路２３とを連通させるようにした。すなわち、第１、第２フロースイッチ１２，２２又はシフトバルブ３１（三方弁４０）に作動不良が発生した場合は、機械室Ｂの油面Ｌ２の高さに基づいて機械室Ｂ内のオイルを適正に吸入することが行えず、機械室Ｂの油面Ｌ２が設定高さ以上になってしまうおそれがある。したがって、そのような場合には、連通路４１を開くことでオイル収容室Ａと機械室Ｂの両方からオイルを吸入し、オイル収容室Ａと機械室Ｂの油面高さＬ１，Ｌ２が等しくなるように調整する。これにより、第１、第２フロースイッチ１２，２２又は三方弁４０に作動不良が発生した場合でも、機械室Ｂの油面Ｌ２が設定高さを大きく上回ることを回避できるので、ギヤ機構２による掻き上げ抵抗が増大するなどの不都合を抑制できる。   As described above, the oil suction device 10 of the present embodiment includes the communication passage 41 that communicates the first oil passage 13 and the second oil passage 23 and the shutoff valve 42 that blocks the communication passage 41. When it is determined that a malfunction has occurred in the first and second flow switches 12, 22 or the three-way valve 40 (shift valve 31), the shut-off valve 42 is opened and the first oil passage 13 and the second oil passage 23 Was made to communicate. That is, when a malfunction occurs in the first and second flow switches 12, 22 or the shift valve 31 (three-way valve 40), the oil in the machine chamber B is drained based on the oil level L2 of the machine chamber B. Inhalation cannot be performed properly, and the oil level L2 of the machine room B may exceed the set height. Accordingly, in such a case, by opening the communication passage 41, oil is sucked from both the oil storage chamber A and the machine chamber B, and the oil level heights L1 and L2 of the oil storage chamber A and the machine chamber B are equal. Adjust so that Thereby, even when an operation failure occurs in the first and second flow switches 12, 22 or the three-way valve 40, it is possible to avoid the oil level L2 of the machine room B from greatly exceeding the set height. Inconveniences such as an increase in scraping resistance can be suppressed.

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、上記実施形態では、変速機１のケーシング３内をオイル収容室Ａと機械室Ｂの二室に区画した場合を示したが、本発明のオイル吸入装置１０では、変速機１のケーシング３内にオイル収容室Ａと機械室Ｂに加えてさらに他の室を設けて、ケーシング３内を三室以上に区画した構成であってもよい。また、オイル収容室Ａと機械室Ｂの具体的な形状や寸法や配置は、上記実施形態に示すものには限定されず、他の形状や寸法や配置であってもよい。また、本発明のオイル吸入装置を適用する変速機は、上記構成の変速機１には限定されず、他の構成の自動変速機や手動変速機にも適用が可能である。   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, in the above embodiment, the case where the casing 3 of the transmission 1 is divided into two chambers, the oil storage chamber A and the machine chamber B, is shown. However, in the oil suction device 10 of the present invention, the casing 3 of the transmission 1 is shown. In addition to the oil storage chamber A and the machine chamber B, another chamber may be provided, and the casing 3 may be divided into three or more chambers. In addition, the specific shapes, dimensions, and arrangements of the oil storage chamber A and the machine room B are not limited to those shown in the above embodiment, and may be other shapes, dimensions, and arrangements. The transmission to which the oil suction device of the present invention is applied is not limited to the transmission 1 having the above-described configuration, and can be applied to an automatic transmission or a manual transmission having another configuration.

１ 変速機
２ ギヤ機構
３ ケーシング
４ 仕切壁
６ａ 入力軸
６ｂ 第１出力軸
６ｃ 第２出力軸
６ｄ デファレンシャル軸
１０ オイル吸入装置
１２ 第１フロースイッチ（他の油面検知手段）
１３ 第１油路
２２ 第２フロースイッチ（油面検知手段）
２３ 第２油路
３１ シフトバルブ
３４ 油路
３５ オイルストレーナ
４０ 三方弁
４１ 連通路
４２ 遮断弁
Ａ オイル収容室
Ｂ 機械室
ＯＰ オイルポンプ DESCRIPTION OF SYMBOLS 1 Transmission 2 Gear mechanism 3 Casing 4 Partition wall 6a Input shaft 6b 1st output shaft 6c 2nd output shaft 6d Differential shaft 10 Oil suction device 12 1st flow switch (Other oil level detection means)
13 1st oil path 22 2nd flow switch (oil level detection means)
23 Second oil passage 31 Shift valve 34 Oil passage 35 Oil strainer 40 Three-way valve 41 Communication passage 42 Shut-off valve A Oil storage chamber B Machine chamber OP Oil pump

Claims (3)

変速機のケーシング内に設けたギヤ機構を収容する機械室と、
前記ギヤ機構で掻き上げられたオイルを収容するオイル収容室と、
前記機械室の油面を検知するための油面検知手段と、
前記ケーシング内のオイルを吸入するためのオイルポンプと、
前記オイル収容室から前記オイルポンプに繋がる第１油路と、前記機械室から前記オイルポンプに繋がる第２油路と、
前記第１油路と前記第２油路を切り換えて前記オイルポンプに連通させるシフトバルブと、
前記油面検知手段の検知信号に基づいて前記シフトバルブの切り換えを制御する制御手段と、を備え、
前記制御手段は、
前記油面検知手段で検知した前記機械室の油面が予め設定した所定高さ以上の場合には、前記シフトバルブで前記第２油路を選択して、前記機械室を前記オイルポンプに連通させ、
前記機械室の油面が前記所定高さよりも低い場合には、前記シフトバルブで前記第１油路を選択して、前記オイル収容室を前記オイルポンプに連通させる
ことを特徴とする変速機のオイル吸入装置。 A machine room that houses a gear mechanism provided in the casing of the transmission;
An oil storage chamber for storing oil scooped up by the gear mechanism;
Oil level detecting means for detecting the oil level of the machine room;
An oil pump for inhaling oil in the casing;
A first oil passage connected from the oil storage chamber to the oil pump; a second oil passage connected from the machine chamber to the oil pump;
A shift valve that switches between the first oil passage and the second oil passage to communicate with the oil pump;
Control means for controlling switching of the shift valve based on a detection signal of the oil level detection means,
The control means includes
When the oil level of the machine room detected by the oil level detection means is higher than a predetermined height set in advance, the second oil passage is selected by the shift valve, and the machine room communicates with the oil pump. Let
When the oil level of the machine chamber is lower than the predetermined height, the shift valve selects the first oil passage, and the oil storage chamber communicates with the oil pump. Oil inhaler. 前記第１油路と前記第２油路とを連通する連通路と、
前記連通路を遮断する遮断弁と、をさらに備え、
前記制御手段は、前記油面検知手段又は前記シフトバルブに作動不良が発生したと判断したときは、前記遮断弁を開いて前記第１油路と前記第２油路とを連通させる
ことを特徴とする請求項１に記載の変速機のオイル吸入装置。 A communication passage communicating the first oil passage and the second oil passage;
A shutoff valve that shuts off the communication path,
When the control means determines that an operation failure has occurred in the oil level detection means or the shift valve, the control means opens the shut-off valve to connect the first oil passage and the second oil passage. The oil suction device for a transmission according to claim 1. 前記オイル収容室の油面を検知する他の油面検知手段をさらに備え、
前記制御手段は、前記他の油面検知手段で検知した前記オイル収容室の油面の高さに基づいて、前記機械室の油面を検知する油面検知手段又は前記シフトバルブに作動不良が発生したか否かを判断する
ことを特徴とする請求項２に記載の変速機のオイル吸入装置。 Further comprising other oil level detection means for detecting the oil level of the oil storage chamber,
The control means has a malfunction in the oil level detection means for detecting the oil level of the machine chamber or the shift valve based on the oil level of the oil storage chamber detected by the other oil level detection means. It is judged whether it generate | occur | produced. The oil intake apparatus of the transmission of Claim 2 characterized by the above-mentioned.
JP2009256595A 2009-11-09 2009-11-09 Transmission oil suction device Expired - Fee Related JP5167227B2 (en)

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