JPS618485A - Oil pump - Google Patents

Oil pump

Info

Publication number
JPS618485A
JPS618485A JP12950284A JP12950284A JPS618485A JP S618485 A JPS618485 A JP S618485A JP 12950284 A JP12950284 A JP 12950284A JP 12950284 A JP12950284 A JP 12950284A JP S618485 A JPS618485 A JP S618485A
Authority
JP
Japan
Prior art keywords
rotor
housing
suction chamber
shape
outer rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP12950284A
Other languages
Japanese (ja)
Inventor
Takashi Nakagawa
隆 中川
Atsushi Satomoto
里元　篤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aisin Corp
Original Assignee
Aisin Seiki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aisin Seiki Co Ltd filed Critical Aisin Seiki Co Ltd
Priority to JP12950284A priority Critical patent/JPS618485A/en
Publication of JPS618485A publication Critical patent/JPS618485A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • F04C2/102—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 the two members rotating simultaneously around their respective axes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Rotary Pumps (AREA)

Abstract

PURPOSE:To secure oil feed from a suction chamber to an operating space with certainty as well as to prevent a cavitation from occurring, by forming the rear end edge of a suction port of a trochoidal pump into such a form going along an edge part of the operating space which comes to maximum capacity. CONSTITUTION:A suction port 34 of this trochoidal pump makes a root circle 2 of an inner rotor 33 an inner circumferential edge and also makes a root circle of an outer rotor 32 an outer circumferential edge, while it extends in a turning direction around an enclosed operating space. The form of a rear end edge of the suction port 34 is made up in form going along the edge part of an operating space 36 in time of being turned to maximum capacity. Therefore, in time of a suction stroke in the pump, it can suck in oil without any hindrance till the time just before the operating space becomes its maximum capacity, thus a cavitation in time of suction is prevented from occurring.

Description

【発明の詳細な説明】 〔発明の目的〕 （産業上の利用分野） 本発明は、自動車エンジンの潤滑油用として装着される
オイルポンプに関し、より詳しくは内側ロータと外側ロ
ータ間の隙間（密封空間）の容積変化によりポンプ作用
を行うトロコイド型オイルポンプに関するものである。[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to an oil pump installed for lubricating oil in an automobile engine, and more specifically, the present invention relates to an oil pump installed for lubricating oil in an automobile engine. This relates to a trochoid oil pump that performs a pumping action by changing the volume of a space.

（従来の技術） この種のオイルポンプの一例として、特開昭５８−３５
２１２号公報に開示されるものが知られている。(Prior art) As an example of this type of oil pump,
One disclosed in Japanese Patent No. 212 is known.

このオイルポンプはトロコイド型ポンプであり、エンジ
ンブロックの側面との間に内部空間を形成するようにハ
ウジングが固定され、該ハウジングの内部空間に第７図
に示される様に環状の外側ロータ５０が回転自在に嵌合
され、該外側ロータ５０の内歯５０ａに係合する外歯５
１ａを有し４葉トロコイド曲線を有する内側ロータ５１
が外側ロータ５α内に嵌合され、内側ロータ５１は該ロ
ータ５１に結合され前記ハウジングに軸支される回転シ
ャフトにより駆動される。ハウジングの内部空間の底部
より更に深く、つまり前記エンジンブロック内に吸入室
５２と吐出室５３が形成され、該画室５２．５３が夫々
前記内部空間に連通している。内歯５０ａと外歯５１ａ
により囲まれ゛る密閉空間（図中斜線部分）５６の容積
変化により、　゛吸入室５３側に吐出される。This oil pump is a trochoid type pump, and a housing is fixed to form an internal space between the side surface of the engine block and an annular outer rotor 50 as shown in FIG. 7 in the internal space of the housing. External teeth 5 rotatably fitted and engaged with internal teeth 50a of the outer rotor 50
1a and a four-lobed trochoidal curve.
is fitted into the outer rotor 5α, and the inner rotor 51 is driven by a rotating shaft coupled to the rotor 51 and pivotally supported by the housing. Deeper than the bottom of the interior space of the housing, i.e. in the engine block, an intake chamber 52 and a discharge chamber 53 are formed, each of which compartments 52,53 communicate with said interior space. Internal teeth 50a and external teeth 51a
Due to the change in volume of the sealed space (shaded area in the figure) 56 surrounded by the air, the air is discharged to the suction chamber 53 side.

また、吸入室５２及び吐出室５３の前記内部空間への開
口形状は、第７図の破線で示される様に、その外側形状
が外側ロータ５０の歯底円５４に略一致し、その内側形
状が直線状５５を成している。Further, the shape of the openings of the suction chamber 52 and the discharge chamber 53 into the internal space has an outer shape that substantially matches the root circle 54 of the outer rotor 50, as shown by the broken line in FIG. forms a straight line 55.

（発明が解決しようとする問題点） 一般に、フロントエンジン・リア駆動（Ｆ　Ｒ）方式に
装着されるトロコイド型オイルポンプに於いては、ポン
プの入力シャフトの回転数がエンジン回転数に対し減速
するように設定されており、外側ロータと内側ロータと
の保合速度は比較的遅いものである。最近、フロントエ
ンジン・フロント駆動（ＦＦ）方式化に伴い、軽量でコ
ンパクト化が要求されており、更にはターボチャージャ
搭載の市場ニーズに基づき、コンパクトで大容量の性能
が要求されるようになって来ている。そこで、ポンプ容
量４アツプさせるために、ポンプの回転数（入力シャフ
トの回転数）を増大させる試みがなされている。(Problem to be solved by the invention) Generally, in a trochoid oil pump installed in a front engine/rear drive (FR) system, the rotation speed of the input shaft of the pump decreases relative to the engine rotation speed. Therefore, the engagement speed between the outer rotor and the inner rotor is relatively slow. Recently, with the shift to front-engine/front-drive (FF) systems, there has been a demand for lighter and more compact vehicles.Furthermore, based on market needs for turbochargers, compact and high-capacity performance has become necessary. It is coming. Therefore, attempts have been made to increase the rotational speed of the pump (the rotational speed of the input shaft) in order to increase the pump capacity by 4.

さて、前述の第７図に示される従来のオイルポンプに於
いては、吸入室５２の開口内側形状が直線状５５を成し
ている。その為、第８図に示される外側ロータ５０と内
側ロータ５１の相対位置に於いて、吸入室５２の密閉空
間５６への連通は、斜線にて示され吸入室５２の密閉空
間５６への開口部分５７を介してなされるが、この開口
部分５７の面積が十分に大きくならないので、ポンプの
回転数を増大させる高速回転域になると、吸入室５２か
ら密閉空間５６へのオイル供給が的確に追従しなくなる
。従って、内側ロータ５１の後方に真空部が形成され所
謂キャビテーション現象が生じ気泡が発生し、この気泡
が吐出室５３側に流出し該吐出室５３にて圧縮される。In the conventional oil pump shown in FIG. 7, the inner opening of the suction chamber 52 has a linear shape 55. As shown in FIG. Therefore, in the relative positions of the outer rotor 50 and the inner rotor 51 shown in FIG. However, since the area of this opening portion 57 is not large enough, when the pump reaches a high rotation speed range where the rotation speed increases, the oil supply from the suction chamber 52 to the sealed space 56 does not follow accurately. I won't. Therefore, a vacuum section is formed behind the inner rotor 51 and a so-called cavitation phenomenon occurs, generating bubbles, which flow out to the discharge chamber 53 and are compressed in the discharge chamber 53.

その結果、気泡が破裂し衝撃波が生じて構成部品に衝突
熱が発生し、該構成部品の表面がこの衝突熱により浸食
され、それ故ポンプ能力の低下或いは耐久性の低下を招
くという問題があった。As a result, the bubbles burst and a shock wave is generated, which generates collision heat in the component parts, and the surface of the component parts is eroded by the collision heat, resulting in a problem of decreased pumping capacity or durability. Ta.

そこで本発明は、ポンプの高速回転域に於いても、吸入
室から密閉空間へのオイル供給が確実に追従できるよう
にすることを、その技術的課題とする。Therefore, the technical object of the present invention is to ensure that the oil supply from the suction chamber to the closed space can be followed even in the high-speed rotation range of the pump.

〔発明の構成〕[Structure of the invention]

（問題点を解決するための手段） 上記技術的課題を達成するために講じた技術的手段は、
吸入室の後端部のハウジングの内部空間への開口形状が
、外側ロータの歯底円と、外側ロータ（内歯）と内側ロ
ータ（外歯）とにより形成される密閉空間が最大時のと
きの仕切形状と、内側ロータの歯底円とを結ぶ形状に合
うように設定する、ことである。(Means to solve the problem) The technical measures taken to achieve the above technical problem are:
When the shape of the opening to the internal space of the housing at the rear end of the suction chamber is at its maximum, the sealed space formed by the bottom circle of the outer rotor, the outer rotor (internal teeth), and the inner rotor (external teeth) The shape is set to match the shape connecting the partition shape of the inner rotor and the root circle of the inner rotor.

（作用） 上記手段を採用することにより、吸入室のハウジング内
部空間への開口面積が大きくなり、即ち吸入室の密閉空
間への開口面積が従来より大きく確保される。従って、
密閉空間が最大時に達する直前まで、即ち吸入室の締切
直前まで吸入室と密閉空間との連通が達成され、吸入室
からの密閉空間へのオイル供給がなされ、ポンプの高速
回転域に於いても、吸入室から密閉空間へのオイル供給
が確実に追従できるようになる。(Function) By employing the above means, the opening area of the suction chamber to the housing internal space is increased, that is, the opening area of the suction chamber to the sealed space is secured to be larger than before. Therefore,
Communication between the suction chamber and the sealed space is achieved until just before the sealed space reaches its maximum, that is, just before the suction chamber is shut off, and oil is supplied from the suction chamber to the sealed space, even in the high speed rotation range of the pump. , the oil supply from the suction chamber to the sealed space can be reliably followed.

（実施例） 以下、技術的手段を具体化した一実施例について、添付
図面に基づいて説明する。(Example) Hereinafter, an example embodying the technical means will be described based on the accompanying drawings.

第１図及び第２図に示されるオイルポンプ１０は、エン
ジンブロック１１の一側面（前端面）上にシール１２を
介して液密的に固定される外側ハウジング１３を有し、
エンジンブロック１１の外側（前方）に突出した回転シ
ャフト１４に固定されたプーリー１５を介して駆動され
る構成のトロコイドポンプである。回転シャフト１４を
軸支する外側ハウジング１３は内部空間を存し、該内部
空間に環状の外側ロータ１６が回転自在に嵌合され、更
に該ロータ１６の内歯１６ａと係合する外歯１７ａを有
する内側ロータ１７が、外側ローフ１６内に配設される
。すなわち内側ロータ１７は、外側ロータ１６の回転軸
Ｏ０から偏心した回転軸０２を有し４葉トロコイド曲線
を備えるもので、前記回転シャフト１４は内側ロータ１
７に結合される。The oil pump 10 shown in FIGS. 1 and 2 has an outer housing 13 that is fluid-tightly fixed to one side (front end surface) of an engine block 11 via a seal 12.
This is a trochoid pump configured to be driven via a pulley 15 fixed to a rotating shaft 14 protruding outside (forward) of an engine block 11. The outer housing 13 that pivotally supports the rotating shaft 14 has an inner space, into which an annular outer rotor 16 is rotatably fitted, and further includes outer teeth 17a that engage with inner teeth 16a of the rotor 16. An inner rotor 17 having an inner rotor 17 is disposed within the outer loaf 16 . That is, the inner rotor 17 has a rotation axis 02 eccentric from the rotation axis O0 of the outer rotor 16 and has a four-lobed trochoid curve, and the rotation shaft 14 has a rotation axis 02 eccentric from the rotation axis O0 of the outer rotor 16.
Combined with 7.

上記した外側ハウジング１３．外側ロータ１４、内側ロ
ータ１５および回転シャフト１４のブロック側の端面ば
一つの平面を構成し、この平面より更に深い位置に、つ
まりエンジンブロック１１内に吸入室１８と吐出室１９
が夫々ハウジング１３の内部空間に開口するように形成
され、該画室１８．１９は夫々吸入ポートを備える。The outer housing 13 described above. The end surfaces of the outer rotor 14, inner rotor 15, and rotating shaft 14 on the block side constitute one plane, and a suction chamber 18 and a discharge chamber 19 are located deeper than this plane, that is, in the engine block 11.
are each formed to open into the interior space of the housing 13, and the compartments 18, 19 are each provided with an intake port.

さて、吸入室１８のハウジング１３内部空間への開口形
状は、その外側形状１８’ａが外側ロータ１６の歯底円
２２　（中央はｏｌ）に略一致し、その内側形状１８ｂ
が、つまり吸入室１８の後端部の開口形状が、外側ロー
タＩ６の歯底円２２と、内歯１６ａと外歯１７ａとの間
に形成される密閉空間（第２図の斜線部分）２３の最大
時の仕切形状と、内側ロータ１７の歯底２４　（中心は
Ｏｚ）とを結ぶ形状に合うように設定されている。Now, the shape of the opening of the suction chamber 18 into the internal space of the housing 13 is such that its outer shape 18'a substantially matches the root circle 22 (center is ol) of the outer rotor 16, and its inner shape 18'b
In other words, the shape of the opening at the rear end of the suction chamber 18 is the same as the closed space 23 (shaded area in FIG. 2) formed between the root circle 22 of the outer rotor I6 and the internal teeth 16a and external teeth 17a. It is set to match the shape that connects the partition shape at its maximum with the tooth bottom 24 (center is Oz) of the inner rotor 17.

従って、外側ロータ１６と内側ローフ１７の相対位置が
第３図に示される状態にある時はくこの相対位置は第８
図の従来技術の相対位置に対応する）、・吸入室１８の
密閉空間２３への開口部分（第３図の斜線部分）２５の
面積は、第８図の従来の開口部分５７の面積と比較して
明らかに大きく確保され、密閉空間２３が最大に達する
直前まで、即ち吸入室１８の締切直前まで吸入室１８と
密閉空間２３との連通が確保され、ポンプの高速回転時
に於いても吸入室１８から密閉空間２３へのオイルの供
給が容易となり、オイル供給が回転シャフト１４の回転
に確実に追従するようになる。Therefore, when the relative positions of the outer rotor 16 and the inner loaf 17 are in the state shown in FIG.
(corresponding to the relative position of the prior art shown in the figure), - The area of the opening portion 25 of the suction chamber 18 into the sealed space 23 (hatched area in FIG. 3) is compared with the area of the conventional opening portion 57 in FIG. The communication between the suction chamber 18 and the sealed space 23 is ensured until just before the sealed space 23 reaches its maximum, that is, until just before the suction chamber 18 is closed, and even when the pump rotates at high speed, the suction chamber remains closed. It becomes easy to supply oil from 18 to the closed space 23, and the oil supply reliably follows the rotation of the rotating shaft 14.

第４図は、吐出室１９のハウジング１３内部空間への開
口形状を吸入室１８の開口形状と同一にした例を示すも
ので、第２図に対応している。これにより、密閉空間２
３から吐出室１９へのオイルの排出を容易にしようとす
るものである。FIG. 4 shows an example in which the opening shape of the discharge chamber 19 into the internal space of the housing 13 is made the same as the opening shape of the suction chamber 18, and corresponds to FIG. 2. As a result, the closed space 2
This is intended to facilitate the discharge of oil from 3 to the discharge chamber 19.

第５図および第６図に示されるオイルポンプ３０は、ク
ランクシャフト直結式の実施例を示すもので、ハウジン
グ３１内に外側ロータ３２が回転可能に配設され、該外
側ロータ３２の内歯３２ａに保合可能な外歯３３ａを有
する内側ロータ３３にクランクシャフト（図示せず）が
嵌合結合される。ハウジング３１には更に吸入室３４と
吐出室３５が形成され、該吸入室３４の開口形状は、そ
の外側形状３４ａが外側ロータ３２の歯底円（中心：０
．）に略一致し、吸入室３４後端部の開口形状が、外側
ロータ３２の歯底円と、密閉空間３６の最大時の仕切形
状と、内外ロータ３３の歯底円（中心二〇□）とを結ぶ
形状に合うように設定される。The oil pump 30 shown in FIGS. 5 and 6 shows an embodiment of a crankshaft direct connection type, in which an outer rotor 32 is rotatably disposed within a housing 31, and internal teeth 32a of the outer rotor 32 are rotatably disposed within a housing 31. A crankshaft (not shown) is fitted and coupled to the inner rotor 33, which has outer teeth 33a that can be fitted to the inner rotor 33. The housing 31 is further formed with a suction chamber 34 and a discharge chamber 35, and the opening shape of the suction chamber 34 is such that its outer shape 34a corresponds to the root circle (center: 0) of the outer rotor 32.
．． ), and the opening shape of the rear end of the suction chamber 34 is approximately the same as the root circle of the outer rotor 32, the maximum partition shape of the sealed space 36, and the root circle of the inner and outer rotor 33 (center 2〇□). It is set to match the shape that connects the

尚、第６ａ図は、吐出室３５の開口形状を吸入室３４の
開口形状と同一にした実施例を示す。Note that FIG. 6a shows an embodiment in which the opening shape of the discharge chamber 35 is made the same as the opening shape of the suction chamber 34.

〔発明の効果〕 吸入室から密閉空間へのオイルの吸込性を改良して、回
転シャフトの高速回転時に於いてもオイル供給の確実な
追従を達成する他の技術手段として、吸入室の深さ寸法
を大きくする方法も考えられているが、この方法に比べ
本発明は、吸入室の深さ寸法を変更する必要がなく、ポ
ンプ本体の軸方向長さ寸法を小さくすることが可能とな
る。[Effects of the Invention] As another technical means for improving the suction of oil from the suction chamber into the sealed space and achieving reliable oil supply tracking even when the rotating shaft rotates at high speed, the depth of the suction chamber has been improved. Although a method of increasing the dimensions has been considered, compared to this method, the present invention does not require changing the depth dimension of the suction chamber, and it is possible to reduce the axial length dimension of the pump body.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明に従ったオイルポンプの一実施例を示す
断面図、第２図および第３図は第１図のＡ−Ａ断面図、
第４図は第２図の変形例を示す断面図、第５図は本発明
に従ったオイルポンプの他の実施例を示す断面図、第６
図は第５図のＢ−Ｂ断面図、第６ａ図は第６図の変形例
を示す断面図、第７図および第８図は従来のオイルポン
プの一例を示す断面図である。 １０・・・オイルポンプ、１１・・・エンジンブロック
、１３．３１・・・ハウジング、１４・・・回転シャフ
ト、１６．３２・・・外側ロータ、１６ａ、３２ａ−、
−−内歯、１７．３３・−・内側ロータ、１７ａ、３３
ａ・・・外歯、１８゜３４・・・吸入室、１８ａ・・・
外側形状、１８ｂ・・・内側形状、１９．３５・・・吐
出室、２２・・・外側ロータの歯底円、２３．３６・・
・密閉空間、２４・・・内側ロータの歯底円慎　１　− 第３Ｉｌｌ　　　　　　　　　　剪４−箪５ｍFIG. 1 is a sectional view showing an embodiment of an oil pump according to the present invention, FIGS. 2 and 3 are sectional views taken along line AA in FIG.
4 is a sectional view showing a modification of FIG. 2, FIG. 5 is a sectional view showing another embodiment of the oil pump according to the present invention, and FIG.
The figure is a sectional view taken along line BB in FIG. 5, FIG. 6a is a sectional view showing a modification of FIG. 6, and FIGS. 7 and 8 are sectional views showing an example of a conventional oil pump. DESCRIPTION OF SYMBOLS 10... Oil pump, 11... Engine block, 13.31... Housing, 14... Rotating shaft, 16.32... Outer rotor, 16a, 32a-,
--Inner teeth, 17.33 ---Inner rotor, 17a, 33
a... External tooth, 18°34... Suction chamber, 18a...
Outer shape, 18b... Inner shape, 19.35... Discharge chamber, 22... Outer rotor root circle, 23.36...
・Closed space, 24... Inner rotor tooth bottom circle 1 - 3rd Ill shear 4 - 5 m

Claims (1)

【特許請求の範囲】[Claims] 　内部空間を備えるハウジング内に内歯を備える外側ロ
ータを回転自在に嵌合し、該外側ロータの内歯に係合す
る外歯を備える内側ロータを前記外側ロータ内に嵌合し
、前記ハウジングに軸支される回転シヤフトを前記内側
ロータに結合し、前記ハウジングの内部空間に開口する
吸収室と吐出室を前記ハウジング内に形成するオイルポ
ンプに於いて、前記吸入室後端部の前記ハウジングの内
部空間への開口形状が、前記外側ロータの歯底円と、前
記内歯と前記外歯とにより形成される密閉空間の最大時
に於ける仕切形状と、前記内側ロータの歯底円とを結ぶ
形状に合うように設定されるオイルポンプ。an outer rotor with internal teeth is rotatably fitted into a housing with an internal space; an inner rotor with external teeth that engages with the internal teeth of the outer rotor is fitted into the outer rotor; In an oil pump in which a rotary shaft supported by the shaft is coupled to the inner rotor, and an absorption chamber and a discharge chamber opening into the inner space of the housing are formed in the housing, a portion of the housing at a rear end of the suction chamber is provided. An opening shape to the internal space connects a root circle of the outer rotor, a partition shape at the maximum of the sealed space formed by the inner teeth and the outer teeth, and a root circle of the inner rotor. Oil pump set to fit the shape.
JP12950284A 1984-06-22 1984-06-22 Oil pump Pending JPS618485A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12950284A JPS618485A (en) 1984-06-22 1984-06-22 Oil pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12950284A JPS618485A (en) 1984-06-22 1984-06-22 Oil pump

Publications (1)

Publication Number Publication Date
JPS618485A true JPS618485A (en) 1986-01-16

Family

ID=15011065

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12950284A Pending JPS618485A (en) 1984-06-22 1984-06-22 Oil pump

Country Status (1)

Country Link
JP (1) JPS618485A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0223280A (en) * 1988-07-12 1990-01-25 Suzuki Motor Co Ltd Oil pump for engine
JPH04107488U (en) * 1991-02-28 1992-09-17 株式会社アツギユニシア oil pump
DE4241873A1 (en) * 1991-12-13 1993-07-01 Aisin Seiki Oil pump for engine lubrication - has inner gear and outer gear which form pump chambers with increased suction efficiency
JP2010101225A (en) * 2008-10-22 2010-05-06 Hino Motors Ltd Cylinder block structure of internal combustion engine
US7922468B2 (en) * 2005-06-22 2011-04-12 Magna Powertrain, Inc. Gear pump with improved inlet port
CN102966536A (en) * 2012-11-22 2013-03-13 无锡市东方液压件制造有限公司 Cycloid internal gear oil pump

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5982594A (en) * 1982-10-29 1984-05-12 Sumitomo Electric Ind Ltd Rotary pump

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5982594A (en) * 1982-10-29 1984-05-12 Sumitomo Electric Ind Ltd Rotary pump

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0223280A (en) * 1988-07-12 1990-01-25 Suzuki Motor Co Ltd Oil pump for engine
JPH04107488U (en) * 1991-02-28 1992-09-17 株式会社アツギユニシア oil pump
DE4241873A1 (en) * 1991-12-13 1993-07-01 Aisin Seiki Oil pump for engine lubrication - has inner gear and outer gear which form pump chambers with increased suction efficiency
US7922468B2 (en) * 2005-06-22 2011-04-12 Magna Powertrain, Inc. Gear pump with improved inlet port
KR101304075B1 (en) * 2005-06-22 2013-09-05 에스티티 테크놀로지스 인크., 어 조인트 벤쳐 오브 마그나 파워트레인 인크. 앤드 에스하베 게엠베하 Gear pump with improved inlet port
JP2010101225A (en) * 2008-10-22 2010-05-06 Hino Motors Ltd Cylinder block structure of internal combustion engine
CN102966536A (en) * 2012-11-22 2013-03-13 无锡市东方液压件制造有限公司 Cycloid internal gear oil pump

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