JP2001336410A - Hydraulic oil pipe line for internal combustion engine - Google Patents

Hydraulic oil pipe line for internal combustion engine

Info

Publication number
JP2001336410A
JP2001336410A JP2000153067A JP2000153067A JP2001336410A JP 2001336410 A JP2001336410 A JP 2001336410A JP 2000153067 A JP2000153067 A JP 2000153067A JP 2000153067 A JP2000153067 A JP 2000153067A JP 2001336410 A JP2001336410 A JP 2001336410A
Authority
JP
Japan
Prior art keywords
internal combustion
combustion engine
supply passage
oil
hydraulic oil
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
JP2000153067A
Other languages
Japanese (ja)
Inventor
Shoji Morita
正二 盛田
Ikuo Misumi
育男 三角
Original Assignee
Unisia Jecs Corp
株式会社ユニシアジェックス
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 Unisia Jecs Corp, 株式会社ユニシアジェックス filed Critical Unisia Jecs Corp
Priority to JP2000153067A priority Critical patent/JP2001336410A/en
Publication of JP2001336410A publication Critical patent/JP2001336410A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic oil pipe line for an internal combustion engine which does not cause malfunctions of lubrication in each portions of the lubricating system of the internal combustion engine. SOLUTION: A first supply pipe line 10 which introduces a hydraulic oil from an oil pump 1 to each portions of the lubricating system 9 of the internal combustion engine is provided. A second supply pipe line 12 being branched from the first supply pipe line 10, which introduces the hydraulic oil to a valve characterization controller 11 is provided. A control valve 16 which controls the oil pressure in the second supply pipe line 12 to the predetermined pressure is provided. An orifice 17 is provided downstream the branched point to the second supply pipe line 12 of the first supply pipe line 10.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【0001】[0001]
【発明の属する技術分野】本発明は、オイルポンプから
内燃機関の潤滑各部及びバルブ特性制御装置に作動油を
供給する内燃機関の油圧回路に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic circuit for an internal combustion engine that supplies hydraulic oil from an oil pump to various lubrication units and a valve characteristic control device of the internal combustion engine.
【0002】[0002]
【従来の技術】この種の油圧回路として、例えば特開平
10−103034号公報には、オイルポンプから内燃
機関の潤滑各部に作動油を導く第1供給通路と、バルブ
特性制御装置から内燃機関の潤滑各部に作動油を導く第
2供給通路とを備え、更に、内燃機関の低速運転時、第
1供給通路に供給される作動油の流量を制限するスイッ
チングバルブを備えた油圧回路が開示してある。
2. Description of the Related Art As a hydraulic circuit of this type, for example, Japanese Patent Application Laid-Open No. 10-103434 discloses a first supply passage for guiding hydraulic oil from an oil pump to various lubricating parts of an internal combustion engine, and a valve characteristic control device for controlling the internal combustion engine. There is disclosed a hydraulic circuit including a second supply passage for guiding hydraulic oil to each part of the lubrication, and further including a switching valve for limiting a flow rate of the hydraulic oil supplied to the first supply passage when the internal combustion engine is operating at a low speed. is there.
【0003】前記従来の油圧回路は、内燃機関の低速運
転時には内燃機関の潤滑各部に作動油を供給する第1供
給通路への作動油の供給がスイッチングバルブによって
遮断され、オイルポンプから吐出される作動油の全量が
バルブ特性制御装置に送り出されて、バルブ特性制御装
置を作動可能な状態にするようになっている。
In the conventional hydraulic circuit, when the internal combustion engine is operating at a low speed, the supply of the hydraulic oil to a first supply passage for supplying the hydraulic oil to various parts of the internal combustion engine is shut off by a switching valve and discharged from an oil pump. The entire amount of the hydraulic oil is sent to the valve characteristic control device so that the valve characteristic control device can be operated.
【0004】[0004]
【発明が解決しようとする課題】しかしながら、前記従
来例にあっては、内燃機関の低速運転時には内燃機関の
潤滑各部に作動油を供給する第1供給通路への作動油の
供給が遮断されるため、バルブ特性制御装置を介して作
動油が供給されるまでの間は、一時的に潤滑各部に作動
油が供給されない状態が生じる虞がある。これによっ
て、前記潤滑各部の潤滑不良を生じる虞がある。
However, in the above-mentioned conventional example, the supply of the hydraulic oil to the first supply passage for supplying the hydraulic oil to the lubricating parts of the internal combustion engine is interrupted during the low-speed operation of the internal combustion engine. Therefore, until hydraulic oil is supplied via the valve characteristic control device, there is a possibility that a state in which hydraulic oil is not temporarily supplied to each lubricating portion may occur. This may cause poor lubrication of the lubricating parts.
【0005】本発明は前記従来の実情に鑑みて案出され
たもので、内燃機関の潤滑各部の潤滑不良を生じること
がない内燃機関の油圧回路を提供することを目的とす
る。
The present invention has been devised in view of the above conventional circumstances, and has as its object to provide a hydraulic circuit for an internal combustion engine that does not cause poor lubrication of various parts of the internal combustion engine.
【0006】[0006]
【課題を解決するための手段】そこで、請求項1記載の
発明は、オイルポンプから内燃機関の潤滑各部及びバル
ブ特性制御装置に作動油を供給する内燃機関の油圧回路
において、前記オイルポンプから内燃機関の潤滑各部に
作動油を導く第1供給通路と、この第1供給通路から分
岐してバルブ特性制御装置に作動油を導く第2供給通路
と、この第2供給通路の圧力を所定圧力に制御する制御
弁と、前記第1供給通路の第2供給通路への分岐点より
も下流側に設けられたオリフィスと、を備えてなる構成
にしてある。
SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a hydraulic circuit for an internal combustion engine for supplying hydraulic oil from an oil pump to various parts of the internal combustion engine and a valve characteristic control device. A first supply passage for guiding hydraulic oil to various parts of the engine, a second supply passage branching from the first supply passage and guiding hydraulic oil to the valve characteristic control device, and a pressure of the second supply passage to a predetermined pressure. And a control valve for controlling, and an orifice provided downstream of a branch point of the first supply passage to the second supply passage.
【0007】また、請求項2記載の発明は、請求項1記
載の発明の構成において、前記制御弁が、第2供給通路
の圧力に応じて開閉するリリーフ弁である構成にしてあ
る。
According to a second aspect of the present invention, in the configuration of the first aspect, the control valve is a relief valve that opens and closes according to the pressure of the second supply passage.
【0008】また、請求項3記載の発明は、請求項1記
載の発明の構成において、前記制御弁を通過した余剰油
が、内燃機関の潤滑各部に導かれる構成にしてある。
According to a third aspect of the present invention, in the configuration of the first aspect of the present invention, the surplus oil that has passed through the control valve is guided to various lubricating parts of the internal combustion engine.
【0009】また、請求項4記載の発明は、請求項1記
載の発明の構成において、前記オリフィスは、開口面積
が変化可能な可変オリフィスである構成にしてある。
According to a fourth aspect of the present invention, in the configuration of the first aspect, the orifice is a variable orifice whose opening area can be changed.
【0010】斯かる構成においては、内燃機関によって
オイルポンプが駆動され、このオイルポンプからの作動
油が内燃機関の潤滑各部及びバルブ特性制御装置に供給
される。即ち、前記オイルポンプからの作動油が、第1
供給通路を介して内燃機関の潤滑各部に導かれると共
に、第1供給通路から分岐する第2供給通路を介してバ
ルブ特性制御装置に導かれる。
In such a configuration, an oil pump is driven by the internal combustion engine, and hydraulic oil from the oil pump is supplied to various lubricating parts of the internal combustion engine and a valve characteristic control device. That is, the hydraulic oil from the oil pump is
It is guided to various parts of the lubrication of the internal combustion engine via the supply passage, and is guided to the valve characteristic control device via the second supply passage branched from the first supply passage.
【0011】このとき、前記内燃機関の低速運転時は、
オイルポンプの吐出量は少ないから、制御弁が第2供給
通路の圧力を低下させるように作動することはなく、オ
イルポンプからの作動油が第1供給通路を介して内燃機
関の潤滑各部に導かれると共に、第2供給通路を介して
バルブ特性制御装置に導かれる。即ち、前記オイルポン
プからの作動油が、第1供給通路に設けたオリフィスを
介して内燃機関の潤滑各部に導かれると共に、制御弁が
作動することなく、第2吐出通路からバルブ特性制御装
置に導かれる。
At this time, at the time of low speed operation of the internal combustion engine,
Since the discharge amount of the oil pump is small, the control valve does not operate to reduce the pressure in the second supply passage, and the hydraulic oil from the oil pump is guided to the lubricating parts of the internal combustion engine via the first supply passage. While being guided to the valve characteristic control device via the second supply passage. That is, the hydraulic oil from the oil pump is guided to various parts of the lubrication of the internal combustion engine through the orifice provided in the first supply passage, and the control valve is not operated. Be guided.
【0012】一方、前記内燃機関の高速運転時は、オイ
ルポンプの吐出量が増加するから、制御弁が第2供給通
路の圧力を低下させるように作動して、オイルポンプか
らの作動油が第1供給通路を介して内燃機関の潤滑各部
に導かれると共に、第2供給通路を介してバルブ特性制
御装置に導かれる。即ち、前記オイルポンプからの作動
油が、第1供給通路に設けたオリフィスを介して内燃機
関の潤滑各部に導かれると共に、制御弁が作動して第2
供給通路の圧力が制御された状態で、この第2供給通路
からバルブ特性制御装置に導かれる。
On the other hand, when the internal combustion engine is operating at a high speed, the discharge amount of the oil pump increases. Therefore, the control valve operates to reduce the pressure in the second supply passage, and the hydraulic oil from the oil pump is discharged. It is led to each part of the lubrication of the internal combustion engine through one supply passage and to the valve characteristic control device through a second supply passage. That is, the hydraulic oil from the oil pump is guided to each lubricating portion of the internal combustion engine via the orifice provided in the first supply passage, and the control valve is operated to activate the second oil.
In a state where the pressure of the supply passage is controlled, the pressure is guided from the second supply passage to the valve characteristic control device.
【0013】ここで、本発明にあっては、前記内燃機関
の低速運転時において、内燃機関の潤滑各部に作動油を
供給する第1供給通路はオリフィスを介して開通してお
り、遮断されることがない。このため、前記内燃機関の
潤滑各部の潤滑不良を生じることがない。
According to the present invention, during the low-speed operation of the internal combustion engine, the first supply passage for supplying the hydraulic oil to the lubricating parts of the internal combustion engine is opened via the orifice and is shut off. There is no. For this reason, there is no occurrence of poor lubrication of each lubricating portion of the internal combustion engine.
【0014】したがって、内燃機関の潤滑各部の潤滑不
良を生じることがない内燃機関の油圧回路が得られる。
Therefore, it is possible to obtain a hydraulic circuit for an internal combustion engine that does not cause poor lubrication of various parts of the internal combustion engine.
【0015】また、請求項2記載の発明にあっては、前
記制御弁が、第2供給通路の圧力に応じて開閉するリリ
ーフ弁であるから、制御弁を作動させるための格別な制
御装置を必要とせず、構成が簡素化される。
Further, in the invention according to claim 2, since the control valve is a relief valve that opens and closes according to the pressure of the second supply passage, a special control device for operating the control valve is provided. No configuration is required and the configuration is simplified.
【0016】また、請求項3記載の発明にあっては、前
記制御弁を通過した余剰油が内燃機関の潤滑各部に導か
れるから、十分な作動油量をもって潤滑各部を潤滑する
ことができる。
According to the third aspect of the present invention, since the surplus oil that has passed through the control valve is guided to the lubricating parts of the internal combustion engine, the lubricating parts can be lubricated with a sufficient amount of hydraulic oil.
【0017】また、請求項4記載の発明にあっては、前
記オリフィスは、開口面積が変化可能な可変オリフィス
であるから、とりわけ内燃機関の低速運転時において、
内燃機関の潤滑各部に導く作動油の流量を可変制御する
ことができる。
Further, in the invention according to claim 4, since the orifice is a variable orifice whose opening area can be changed, especially when the internal combustion engine is operated at low speed.
It is possible to variably control the flow rate of the working oil guided to each part of the lubrication of the internal combustion engine.
【0018】[0018]
【発明の実施の形態】以下、本発明の実施の形態を、図
面に基づいて詳述する。
Embodiments of the present invention will be described below in detail with reference to the drawings.
【0019】図1は本発明の実施の形態を示す内燃機関
の油圧回路の説明図である。
FIG. 1 is an explanatory diagram of a hydraulic circuit of an internal combustion engine showing an embodiment of the present invention.
【0020】図において、符番1で示されるのはオイル
ポンプで、このオイルポンプ1は内燃機関(図示せず)
によって駆動されるようになっている。前記オイルポン
プ1の吸入通路2は作動油が貯留されたオイルパン3内
に延びており、この吸入通路2の先端にはオイルストレ
ーナ4が設けてある。また、前記オイルポンプ1にはリ
リーフ弁5が付属しており、このリリーフ弁5はオイル
ポンプ1と吸入通路2とを連通するリリーフ通路6内に
設けてある。
In the figure, reference numeral 1 denotes an oil pump, which is an internal combustion engine (not shown).
It is adapted to be driven by. The suction passage 2 of the oil pump 1 extends into an oil pan 3 in which hydraulic oil is stored, and an oil strainer 4 is provided at a tip of the suction passage 2. Further, a relief valve 5 is attached to the oil pump 1, and the relief valve 5 is provided in a relief passage 6 that connects the oil pump 1 and the suction passage 2.
【0021】前記オイルポンプ1の吐出側には、このオ
イルポンプ1から内燃機関の潤滑各部9に作動油を導く
第1供給通路10と、この第1供給通路10から分岐し
てバルブ特性制御装置11に作動油を導く第2供給通路
12が設けてある。
On the discharge side of the oil pump 1, a first supply passage 10 for guiding hydraulic oil from the oil pump 1 to each lubricating portion 9 of the internal combustion engine, and a valve characteristic control device branched from the first supply passage 10 A second supply passage 12 for guiding hydraulic oil to 11 is provided.
【0022】前記第1供給通路10と第2供給通路12
との間には連通路15が設けられており、この連通路1
5に、第2供給通路12の圧力を所定圧力に制御する制
御弁16が設けてある。前記制御弁16はこの実施の形
態において第2供給通路12の圧力に応じて開閉するリ
リーフ弁となっている。
The first supply passage 10 and the second supply passage 12
A communication path 15 is provided between the communication path 1 and the communication path 1.
5 is provided with a control valve 16 for controlling the pressure of the second supply passage 12 to a predetermined pressure. The control valve 16 is a relief valve that opens and closes according to the pressure of the second supply passage 12 in this embodiment.
【0023】また、前記第1供給通路10の第2供給通
路12への分岐点よりも下流側には、オリフィス17が
設けてある。前記オリフィス17はこの実施の形態にお
いて開口面積が変化しない固定オリフィスが示されてい
るけれども、開口面積が変化可能な可変オリフィスとす
ることも可能である。
An orifice 17 is provided downstream of the branch point of the first supply passage 10 to the second supply passage 12. Although the orifice 17 is a fixed orifice whose opening area does not change in this embodiment, it can be a variable orifice whose opening area can change.
【0024】また、前記第1供給通路10の第2供給通
路12への分岐点よりも上流側には、フィルタ18が設
けられており、このフィルタ18によって作動油中の塵
埃等を除去するようになっている。
Further, a filter 18 is provided upstream of a branch point of the first supply passage 10 to the second supply passage 12, and the filter 18 removes dust and the like in the hydraulic oil. It has become.
【0025】斯かる構成においては、内燃機関(図示せ
ず)によってオイルポンプ1が駆動され、このオイルポ
ンプ1からの作動油が内燃機関の潤滑各部9及びバルブ
特性制御装置11に供給される。即ち、前記オイルポン
プ1が駆動されることによって、作動油がオイルストレ
ーナ5を介して吸入通路2から吸入され、このオイルポ
ンプ1からの作動油が、第1供給通路10を介して内燃
機関の潤滑各部9に導かれると共に、第1供給通路10
から分岐する第2供給通路12を介してバルブ特性制御
装置11に導かれる。この場合に、前記オイルポンプ1
内の圧力超過は、リリーフ弁5のリリーフ動作で解除さ
れる。また、前記内燃機関の潤滑各部9及びバルブ特性
制御装置11に導かれる作動油は第1吐出通路10に設
けたフィルタ18によってろ過される。
In such a configuration, the oil pump 1 is driven by the internal combustion engine (not shown), and the hydraulic oil from the oil pump 1 is supplied to the lubricating parts 9 of the internal combustion engine and the valve characteristic control device 11. That is, when the oil pump 1 is driven, hydraulic oil is sucked from the suction passage 2 via the oil strainer 5, and the hydraulic oil from the oil pump 1 is supplied to the internal combustion engine via the first supply passage 10. The lubrication unit 9 guides the first supply passage 10
The valve is guided to the valve characteristic control device 11 through a second supply passage 12 branched from the valve. In this case, the oil pump 1
The excess pressure inside is released by the relief operation of the relief valve 5. The hydraulic oil guided to the lubricating parts 9 and the valve characteristic control device 11 of the internal combustion engine is filtered by a filter 18 provided in the first discharge passage 10.
【0026】このとき、前記内燃機関の低速運転時は、
オイルポンプ1の吐出量は少ないから、制御弁16が第
2供給通路12の圧力を低下させるように作動すること
はなく、オイルポンプ1からの作動油が第1供給通路1
0を介して内燃機関の潤滑各部9に導かれると共に、第
2供給通路12を介してバルブ特性制御装置11に導か
れる。即ち、前記オイルポンプ1からの作動油が、第1
供給通路10に設けたオリフィス17を介して内燃機関
の潤滑各部9に導かれると共に、制御弁16が作動する
ことなく、第2吐出通路12からバルブ特性制御装置1
1に導かれる。
At this time, at the time of low speed operation of the internal combustion engine,
Since the discharge amount of the oil pump 1 is small, the control valve 16 does not operate so as to decrease the pressure of the second supply passage 12, and the operating oil from the oil pump 1
In addition, it is guided to the lubricating parts 9 of the internal combustion engine via the control valve 0 and to the valve characteristic control device 11 via the second supply passage 12. That is, the hydraulic oil from the oil pump 1
The valve characteristic control device 1 is guided to the lubricating parts 9 of the internal combustion engine through an orifice 17 provided in the supply passage 10 and from the second discharge passage 12 without operating the control valve 16.
It is led to 1.
【0027】一方、前記内燃機関の高速運転時は、オイ
ルポンプ1の吐出量が増加するから、制御弁16が第2
供給通路12の圧力を低下させるように作動して、オイ
ルポンプ1からの作動油が第1供給通路10を介して内
燃機関の潤滑各部9に導かれると共に、第2供給通路1
2を介してバルブ特性制御装置11に導かれる。即ち、
前記オイルポンプ1からの作動油が、第1供給通路10
に設けたオリフィス17を介して内燃機関の潤滑各部9
に導かれると共に、制御弁16が作動して第2供給通路
12の圧力が制御された状態で、この第2供給通路12
からバルブ特性制御装置11に導かれる。また、前記制
御弁16を通過した余剰油は、連通路15を介して第1
供給通路10に導かれ、内燃機関の潤滑各部9に導かれ
る。
On the other hand, when the internal combustion engine is operating at a high speed, the discharge amount of the oil pump 1 increases.
It operates so as to reduce the pressure in the supply passage 12, and the operating oil from the oil pump 1 is guided to the lubricating parts 9 of the internal combustion engine via the first supply passage 10, and the second supply passage 1
It is guided to the valve characteristic control device 11 through 2. That is,
The operating oil from the oil pump 1 is supplied to the first supply passage 10
Parts 9 of the internal combustion engine through orifices 17 provided in the
While the pressure in the second supply passage 12 is controlled by operating the control valve 16, the second supply passage 12
From the valve characteristic control device 11. The surplus oil that has passed through the control valve 16 passes through the communication passage 15 to the first oil.
It is guided to the supply passage 10 and to each lubrication section 9 of the internal combustion engine.
【0028】ここで、本発明にあっては、前記内燃機関
の低速運転時において、内燃機関の潤滑各部9に作動油
を供給する第1供給通路10はオリフィス17を介して
開通しており、遮断されることがない。このため、前記
内燃機関の潤滑各部9の潤滑不良を生じることがない。
In the present invention, the first supply passage 10 for supplying hydraulic oil to the lubricating parts 9 of the internal combustion engine is opened via the orifice 17 during the low-speed operation of the internal combustion engine. There is no interruption. For this reason, there is no occurrence of poor lubrication of the lubricating parts 9 of the internal combustion engine.
【0029】したがって、内燃機関の潤滑各部9の潤滑
不良を生じることがない内燃機関の油圧回路が得られ
る。
Therefore, a hydraulic circuit of the internal combustion engine that does not cause poor lubrication of the lubricating parts 9 of the internal combustion engine can be obtained.
【0030】また、前記制御弁16が第2供給通路12
圧力に応じて開閉するリリーフ弁であるから、制御弁1
6を作動させるための格別な制御装置を必要とせず、構
成の簡素化が図られる。
The control valve 16 is connected to the second supply passage 12
Since it is a relief valve that opens and closes according to pressure, the control valve 1
6 does not require a special control device, and the configuration is simplified.
【0031】また、前記制御弁16を通過した余剰油が
内燃機関の潤滑各部9に導かれるから、十分な作動油量
をもって潤滑各部9を潤滑することができる。
Further, since the excess oil that has passed through the control valve 16 is guided to the lubricating parts 9 of the internal combustion engine, the lubricating parts 9 can be lubricated with a sufficient amount of hydraulic oil.
【0032】また、前記オリフィス17を開口面積が変
化可能な可変オリフィスとすることにより、とりわけ内
燃機関の低速運転時において、内燃機関の潤滑各部9に
導く作動油の流量を可変制御することができる。
Further, by using the orifice 17 as a variable orifice whose opening area can be changed, the flow rate of the hydraulic oil guided to the lubricating parts 9 of the internal combustion engine can be variably controlled, especially during low-speed operation of the internal combustion engine. .
【0033】以上、実施の形態を図面に基づいて説明し
たが、具体的構成はこの実施の形態に限られるものでは
なく、発明の要旨を逸脱しない範囲で変更可能である。
Although the embodiment has been described with reference to the drawings, the specific configuration is not limited to this embodiment and can be changed without departing from the spirit of the invention.
【0034】[0034]
【発明の効果】以上、詳細に説明したように、本発明に
よれば、内燃機関の潤滑各部の潤滑不良を生じることが
ない内燃機関の油圧回路が得られる。
As described in detail above, according to the present invention, it is possible to obtain a hydraulic circuit for an internal combustion engine that does not cause poor lubrication of various parts of the internal combustion engine.
【図面の簡単な説明】[Brief description of the drawings]
【図1】本発明の実施の形態を示す内燃機関の油圧回路
の説明図である。
FIG. 1 is an explanatory diagram of a hydraulic circuit of an internal combustion engine showing an embodiment of the present invention.
【符号の説明】[Explanation of symbols]
1 オイルポンプ 9 潤滑各部 10 第1供給通路 11 バルブ特性制御装置 12 第2供給通路 16 制御弁 17 オリフィス DESCRIPTION OF SYMBOLS 1 Oil pump 9 Each part of lubrication 10 1st supply path 11 Valve characteristic control apparatus 12 2nd supply path 16 Control valve 17 Orifice

Claims (4)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 オイルポンプから内燃機関の潤滑各部及
    びバルブ特性制御装置に作動油を供給する内燃機関の油
    圧回路において、前記オイルポンプから内燃機関の潤滑
    各部に作動油を導く第1供給通路と、この第1供給通路
    から分岐してバルブ特性制御装置に作動油を導く第2供
    給通路と、この第2供給通路の圧力を所定圧力に制御す
    る制御弁と、前記第1供給通路の第2供給通路への分岐
    点よりも下流側に設けられたオリフィスと、を備えてな
    ることを特徴とする、内燃機関の油圧回路。
    In a hydraulic circuit of an internal combustion engine for supplying hydraulic oil from an oil pump to various parts of the internal combustion engine and a valve characteristic control device, a first supply passage for introducing hydraulic oil from the oil pump to various parts of the internal combustion engine is provided. A second supply passage branching from the first supply passage and guiding hydraulic oil to the valve characteristic control device, a control valve for controlling the pressure of the second supply passage to a predetermined pressure, and a second supply passage for the first supply passage. A hydraulic circuit for an internal combustion engine, comprising: an orifice provided downstream of a branch point to a supply passage.
  2. 【請求項2】 前記制御弁は、第2供給通路の圧力に応
    じて開閉するリリーフ弁であることを特徴とする、請求
    項1記載の内燃機関の油圧回路。
    2. The hydraulic circuit for an internal combustion engine according to claim 1, wherein the control valve is a relief valve that opens and closes according to the pressure of the second supply passage.
  3. 【請求項3】 前記制御弁を通過した余剰油は、内燃機
    関の潤滑各部に導かれることを特徴とする、請求項1記
    載の内燃機関の油圧回路。
    3. The hydraulic circuit for an internal combustion engine according to claim 1, wherein the surplus oil that has passed through the control valve is guided to various parts of the internal combustion engine that are lubricated.
  4. 【請求項4】 前記オリフィスは、開口面積が変化可能
    な可変オリフィスであることを特徴とする、請求項1記
    載の内燃機関の油圧回路。
    4. The hydraulic circuit according to claim 1, wherein the orifice is a variable orifice having a variable opening area.
JP2000153067A 2000-05-24 2000-05-24 Hydraulic oil pipe line for internal combustion engine Pending JP2001336410A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000153067A JP2001336410A (en) 2000-05-24 2000-05-24 Hydraulic oil pipe line for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000153067A JP2001336410A (en) 2000-05-24 2000-05-24 Hydraulic oil pipe line for internal combustion engine

Publications (1)

Publication Number Publication Date
JP2001336410A true JP2001336410A (en) 2001-12-07

Family

ID=18658397

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP2001336410A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004044995B4 (en) * 2003-09-18 2008-12-04 General Motors Corp. (N.D.Ges.D. Staates Delaware), Detroit Valves using lubrication system to meet various engine oil pressure requirements
DE102004044998B4 (en) * 2003-09-18 2010-06-02 General Motors Corp. (N.D.Ges.D. Staates Delaware), Detroit Engine lubrication system and pressure reducing valve to limit excess oil flow
JP2011080430A (en) * 2009-10-08 2011-04-21 Hitachi Automotive Systems Ltd Control valve, variable displacement pump using control valve, and hydraulic circuit of internal combustion engine
JP2012219807A (en) * 2011-04-14 2012-11-12 Aisin Seiki Co Ltd Hydraulic control device
DE102004034301B4 (en) * 2004-07-15 2013-12-05 Volkswagen Ag Internal combustion engine with valve lift switching
KR102184520B1 (en) * 2019-05-29 2020-11-30 국방과학연구소 Orifice integrated type relief valve assembly, and turbo pump circuit system having the relief valve assembly

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004044995B4 (en) * 2003-09-18 2008-12-04 General Motors Corp. (N.D.Ges.D. Staates Delaware), Detroit Valves using lubrication system to meet various engine oil pressure requirements
DE102004044998B4 (en) * 2003-09-18 2010-06-02 General Motors Corp. (N.D.Ges.D. Staates Delaware), Detroit Engine lubrication system and pressure reducing valve to limit excess oil flow
DE102004034301B4 (en) * 2004-07-15 2013-12-05 Volkswagen Ag Internal combustion engine with valve lift switching
JP2011080430A (en) * 2009-10-08 2011-04-21 Hitachi Automotive Systems Ltd Control valve, variable displacement pump using control valve, and hydraulic circuit of internal combustion engine
CN102032019A (en) * 2009-10-08 2011-04-27 日立汽车系统株式会社 Control valve and variable capacitance pump using control valve and oil pressure circuit of internal combustion engine
US8834132B2 (en) 2009-10-08 2014-09-16 Hitachi Automotive Systems, Ltd. Apparatus having control valve and variable capacitance pump and hydraulic pressure circuit of internal combustion engine in which the same apparatus is used
JP2012219807A (en) * 2011-04-14 2012-11-12 Aisin Seiki Co Ltd Hydraulic control device
EP2511535A3 (en) * 2011-04-14 2013-09-18 Aisin Seiki Kabushiki Kaisha Hydraulic control device
US9291283B2 (en) 2011-04-14 2016-03-22 Aisin Seiki Kabushiki Kaisha Hydraulic control device
KR102184520B1 (en) * 2019-05-29 2020-11-30 국방과학연구소 Orifice integrated type relief valve assembly, and turbo pump circuit system having the relief valve assembly

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