JP4597101B2 - Engine breather equipment - Google Patents
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- JP4597101B2 JP4597101B2 JP2006222162A JP2006222162A JP4597101B2 JP 4597101 B2 JP4597101 B2 JP 4597101B2 JP 2006222162 A JP2006222162 A JP 2006222162A JP 2006222162 A JP2006222162 A JP 2006222162A JP 4597101 B2 JP4597101 B2 JP 4597101B2
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Description
本発明は、エンジンのブリーザ装置に関し、詳しくは、過給機を用いるに当たり、必要なオイル分離機能が確実に得られるエンジンのブリーザ装置に関するものである。 The present invention relates to a breather device for an engine, and more particularly, to a breather device for an engine that can reliably obtain a necessary oil separation function when a supercharger is used.
従来のエンジンのブリーザ装置として、本発明と同様、シリンダヘッドの上にヘッドカバーを取り付け、このヘッドカバーの天井壁にブリーザ室を設け、このブリーザ室のブリーザ出口からブリーザパイプを導出し、このブリーザパイプの導出端部を吸気経路に接続したものがある(例えば、特許文献１参照)。
この種のエンジンのブリーザ装置では、ブローバイガスに含まれるオイルミストをブリーザ室でオイル分離し、残ったオイルミストはブローバイガスとともに吸気経路に流入させ、オイルミストがエンジンのブリーザ装置外に流出するのを防止している。
As a conventional engine breather device, as in the present invention, a head cover is mounted on the cylinder head, a breather chamber is provided on the ceiling wall of the head cover, a breather pipe is led out from a breather outlet of the breather chamber, and the breather pipe There is one in which a leading end is connected to an intake path (see, for example, Patent Document 1).
In this type of engine breather device, oil mist contained in the blow-by gas is separated into oil in the breather chamber, and the remaining oil mist flows into the intake passage together with the blow-by gas, and the oil mist flows out of the engine breather device. Is preventing.
しかし、上記従来のエンジンのブリーザ装置では、ブリーザ室入口からブリーザ室に流入したブローバイガスが、弁座周壁とブリーザ通路周壁との周囲を浮上し、開弁した弁面と弁座との間からブリーザ通路に流出するだけの構造であるため、次の問題がある。 However, in the above-described conventional engine breather device, blow-by gas that has flowed into the breather chamber from the breather chamber inlet floats around the valve seat peripheral wall and the breather passage peripheral wall, and from between the opened valve surface and the valve seat. Since it is a structure that only flows out into the breather passage, there are the following problems.
《問題》 過給機を用いるに当たり、必要なオイル分離機能が得られない場合がある。
過給機を用い、過給機の吸気入口にブリーザパイプの導出端部を接続した場合、ブリーザ室でのブローバイガスの通過量が多くなるため、上記構造をそのまま採用した場合、必要なオイル分離機能が得られない場合がある。
<< Problem >> When using a turbocharger, the required oil separation function may not be obtained.
When using a turbocharger and connecting the outlet end of the breather pipe to the intake inlet of the turbocharger, the amount of blow-by gas passing through the breather chamber increases. The function may not be obtained.
本発明は、上記問題点を解決することができるエンジンのブリーザ装置、すなわち、過給機を用いるに当たり、必要なオイル分離機能が確実に得られるエンジンのブリーザ装置を提供することを課題とする。 An object of the present invention is to provide an engine breather apparatus that can solve the above-described problems, that is, an engine breather apparatus that can reliably obtain a necessary oil separation function when using a supercharger.
(請求項１に係る発明)
請求項１に係る発明の発明特定事項は、次の通りである。
図３に例示するように、シリンダヘッド(１)の上にヘッドカバー(２)を取り付け、このヘッドカバー(２)の上部にブリーザ室(３)を設け、このブリーザ室(３)のブリーザ出口(４)からブリーザパイプ(５)を導出し、このブリーザパイプ(５)の導出端部(６)を吸気経路(７)に接続した、エンジンのブリーザ装置において、
過給機(８)の吸気入口(９)にブリーザパイプ(５)の導出端部(６)を接続するに当たり、次のようにした。
(Invention of Claim 1)
Invention specific matters of the invention according to
As illustrated in FIG. 3, a head cover (2) is mounted on the cylinder head (1), a breather chamber (3) is provided on the head cover (2), and a breather outlet (4) of the breather chamber (3) is provided. ) From the breather pipe (5) and connecting the lead-out end (6) of the breather pipe (5) to the intake passage (7).
In connecting the outlet end portion (6) of the breather pipe (5) to the intake port (9) of the supercharger (8), the following procedure was performed.
図２(Ａ)に例示するように、ヘッドカバー(２)の上部にブリーザ室取付座(１１)を設け、このブリーザ室取付座(１１)にブリーザ室周壁(１２)を着脱自在に取り付け、このブリーザ室周壁(１２)の上面に弁取付座(１３)を形成し、ブリーザ室周壁(１２)で囲まれたブリーザ室(３)内に弁座周壁(１４)を配置し、この弁座周壁(１４)の上面に弁座(１５)を形成し、弁取付座(１３)にダイヤフラム弁(１６)の周縁部(１７)を取り付け、このダイヤフラム弁(１６)の弁面(１８)を弁座(１５)に着座させ、弁座周壁(１４)とブリーザ室周壁(１２)との間にブリーザ通路周壁(１９)を架設し、ブリーザ室周壁(１２)にブリーザ出口(４)を設け、ブリーザ通路周壁(１９)内に弁座(１５)の弁口(１５ａ)からブリーザ出口(４)に至るブリーザ通路(２０)を設け、図２(Ａ)〜(Ｅ)に例示するように、ブリーザ室(３)の下部にブリーザ室入口(２１)を設け、
図２(Ａ)に例示するように、このブリーザ室入口(２１)からブリーザ室(３)に流入したブローバイガスが、弁座周壁(１４)とブリーザ通路周壁(１９)の周囲を浮上し、開弁した弁面(１８)と弁座(１５)との間を通過して、ブリーザ通路(２０)に流入するようにした。
As illustrated in FIG. 2A, a breather chamber mounting seat (11) is provided on the top of the head cover (2), and a breather chamber peripheral wall (12) is detachably mounted on the breather chamber mounting seat (11). A valve mounting seat (13) is formed on the upper surface of the breather chamber peripheral wall (12), and the valve seat peripheral wall (14) is disposed in the breather chamber (3) surrounded by the breather chamber peripheral wall (12). A valve seat (15) is formed on the upper surface of (14), a peripheral portion (17) of the diaphragm valve (16) is attached to the valve mounting seat (13), and the valve surface (18) of the diaphragm valve (16) is attached to the valve seat. A breather passage peripheral wall (19) is installed between the valve seat peripheral wall (14) and the breather chamber peripheral wall (12), and a breather outlet (4) is provided on the breather chamber peripheral wall (12). A breather passage (20) extending from the valve port (15a) of the valve seat (15) to the breather outlet (4) is provided in the peripheral wall (19) of the breather passage. Shimesuru so on, provided the breather chamber inlet (21) in the lower portion of the breather chamber (3),
As illustrated in FIG. 2A, blow-by gas that has flowed into the breather chamber (3) from the breather chamber inlet (21) floats around the valve seat peripheral wall (14) and the breather passage peripheral wall (19). The valve face (18) opened and the valve seat (15) are passed between them to flow into the breather passage (20).
そして、図２(Ａ)に例示するように、ヘッドカバー(２)の上部に前段ブリーザ室周壁(１０)を設け、この前段ブリーザ室周壁(１０)の上部に上記ブリーザ室取付座(１１)を設け、この前段ブリーザ室周壁(１０)で囲まれた前段ブリーザ室(２８)内に予備弁座周壁(２２)を配置し、この予備弁座周壁(２２)の上面に予備弁座(２３)を形成し、ブリーザ室取付座(１１)は前記ダイヤフラム弁(１６)を取り付けられるようにし、予備弁座(２３)は、ブリーザ室取付座(１１)に上記ダイヤフラム弁(１６)を取り付けた場合に、このダイヤフラム弁(１６)の弁面(１８)が着座できるようにし、予備弁座周壁(２２)と前段ブリーザ室周壁(１０)との間に予備ブリーザ通路周壁(２４)を架設し、前段ブリーザ室周壁(１０)に予備ブリーザ出口(２５)を設け、予備ブリーザ通路周壁(２４)内に予備弁座(２３)の予備弁口(２３ａ)から予備ブリーザ出口(２５)に至る予備ブリーザ通路(２６)を設け、予備ブリーザ出口(２５)を着脱自在のプラグ(２７)で封止し、前段ブリーザ室(２８)の下部に前段ブリーザ室入口(３３)を設け、
この前段ブリーザ室入口(３３)から前段ブリーザ室(２８)に流入したブローバイガスが、予備弁座周壁(２２)と予備ブリーザ通路周壁(２４)の周囲を浮上し、ブリーザ室入口(２１)からブリーザ室(３)に流入するようにした。
2A, a front breather chamber peripheral wall (10) is provided at the top of the head cover (2), and the breather chamber mounting seat (11) is provided at the top of the front breather chamber peripheral wall (10). The preliminary valve seat peripheral wall (22) is disposed in the front breather chamber (28) surrounded by the front breather chamber peripheral wall (10), and the preliminary valve seat (23) is disposed on the upper surface of the preliminary valve seat peripheral wall (22). The breather chamber mounting seat (11) can be mounted with the diaphragm valve (16), and the spare valve seat (23) is mounted with the diaphragm valve (16) on the breather chamber mounting seat (11). In addition, the valve face (18) of the diaphragm valve (16) can be seated, and a preliminary breather passage peripheral wall (24) is installed between the preliminary valve seat peripheral wall (22) and the front-stage breather chamber peripheral wall (10). A spare breather outlet (25) is provided on the peripheral wall (10) of the front breather chamber, and a spare breather passage is provided. A spare breather passage (26) from the spare valve port (23a) of the spare valve seat (23) to the spare breather outlet (25) is provided in the peripheral wall (24), and the spare breather outlet (25) is detachably attached to the plug (27 ), And a front breather chamber entrance (33) is provided at the bottom of the front breather chamber (28),
The blow-by gas that has flowed into the front-stage breather chamber (28) from the front-stage breather chamber inlet (33) floats around the preliminary valve seat peripheral wall (22) and the preliminary breather passage peripheral wall (24), and from the breather chamber inlet (21). It was made to flow into the breather chamber (3).
そして、図２(Ａ)に例示するように、ブリーザ室取付座(１１)からブリーザ室周壁(１２)を取り外した場合には、ブリーザ室取付座(１１)に前記ダイヤフラム弁(１６)を取り付け、このダイヤフラム弁(１６)の弁面(１８)を予備弁座(２３)に着座させ、予備ブリーザ出口(２５)のプラグ(２７)を外し、この予備ブリーザ出口(２７)からブリーザパイプ(５)を導出することによって、前段ブリーザ室(２８)をダイヤフラム弁(１６)を備えた単一のブリーザ室として用いることができるようにした。 As illustrated in FIG. 2A, when the breather chamber peripheral wall (12) is removed from the breather chamber mounting seat (11), the diaphragm valve (16) is mounted on the breather chamber mounting seat (11). Then, the valve face (18) of the diaphragm valve (16) is seated on the spare valve seat (23), the plug (27) of the spare breather outlet (25) is removed, and the breather pipe (5 ), The front breather chamber (28) can be used as a single breather chamber equipped with a diaphragm valve (16).
（請求項１に係る発明）
《効果》 過給機を用いるに当たり、必要なオイル分離機能が確実に得られる。
図２(Ａ)に例示するように、ブローバイガスがブリーザ室(３)に流入する前に、前段ブリーザ室入口(３３)から前段ブリーザ室(２８)に流入したブローバイガスが、予備弁座周壁(２２)と予備ブリーザ通路周壁(２４)の周囲を浮上するため、ブローバイガスに含まれるオイルミストが予備弁座周壁(２２)と予備ブリーザ通路周壁(２４)の表面で凝縮し、オイル分離がなされる。また、ブリーザ室入口(２１)からブリーザ室(３)に流入したブローバイガスが、弁座周壁(１４)とブリーザ通路周壁(１９)の周囲を浮上するため、ブローバイガスに含まれるオイルミストが弁座周壁(１４)とブリーザ通路周壁(１９)の表面で凝縮し、オイル分離がなされる。このように、前段ブリーザ室(２８)とブリーザ室(３)とで二重にオイル分離がなされ、過給機(８)を用いるに当たり、必要なオイル分離機能が確実に得られる。
(Invention according to Claim 1)
<Effect> When using a turbocharger, the necessary oil separation function can be obtained reliably.
As illustrated in FIG. 2A, before the blowby gas flows into the breather chamber (3), the blowby gas that has flowed into the front breather chamber (28) from the front breather chamber inlet (33) Since the oil mist contained in the blowby gas is condensed on the surfaces of the spare valve seat circumferential wall (22) and the spare breather passage circumferential wall (24), the oil separation occurs. Made. Further, since blow-by gas flowing into the breather chamber (3) from the breather chamber inlet (21) floats around the valve seat peripheral wall (14) and the breather passage peripheral wall (19), oil mist contained in the blow-by gas is valved. Oil is separated by condensation on the surfaces of the peripheral wall (14) and the breather passage peripheral wall (19). In this way, oil separation is performed twice in the front breather chamber (28) and the breather chamber (3), and a necessary oil separation function can be reliably obtained when using the supercharger (8).
《効果》 過給エンジンの前段ブリーザ室を無過給エンジンのブリーザ室に転用することができる。
図２(Ａ)に例示するように、ブリーザ室取付座(１１)からブリーザ室周壁(１２)を取り外した場合には、ブリーザ室取付座(１１)にダイヤフラム弁(１６)を取り付け、このダイヤフラム弁(１６)の弁面(１８)を予備弁座(２３ａ)に着座させ、予備ブリーザ出口(２５)のプラグ(２７)を外すことによって、前段ブリーザ室(２８)をダイヤフラム弁(１６)を備えた単一のブリーザ室として使用できる。このため、この過給エンジンの前段ブリーザ室(２８)を、高いオイル分離機能を必要としない無過給エンジンのブリーザ室に転用することができる。
<Effect> The front breather chamber of the supercharged engine can be diverted to the breather chamber of the non-supercharged engine.
As illustrated in FIG. 2A, when the breather chamber peripheral wall (12) is removed from the breather chamber mounting seat (11), a diaphragm valve (16) is mounted on the breather chamber mounting seat (11). The valve face (18) of the valve (16) is seated on the spare valve seat (23a), and the plug (27) of the spare breather outlet (25) is removed, whereby the front breather chamber (28) is moved to the diaphragm valve (16). It can be used as a single breather chamber. For this reason, the pre-stage breather chamber (28) of the supercharged engine can be diverted to the breather chamber of the non-supercharged engine that does not require a high oil separation function.
《効果》 無過給エンジンとヘッドカバーを共通部品化することができる。
図２(Ａ)に例示するように、予備弁座周壁(２２)の上面に予備弁座(２３)を形成し、ブリーザ室取付座(１１)に前記ダイヤフラム弁(１６)を取り付けられるようにし、予備弁座(２３)は、ブリーザ室取付座(１１)に上記ダイヤフラム弁(１６)を取り付けた場合に、このダイヤフラム弁(１６)の弁面(１８)が着座できるようにしているため、無過給エンジンとヘッドカバー(２)を共通部品化することができる。
<Effect> The non-supercharged engine and the head cover can be made into a common part.
As illustrated in FIG. 2 (A), a spare valve seat (23) is formed on the upper surface of the spare valve seat peripheral wall (22) so that the diaphragm valve (16) can be attached to the breather chamber mounting seat (11). The spare valve seat (23) allows the valve face (18) of the diaphragm valve (16) to be seated when the diaphragm valve (16) is attached to the breather chamber mounting seat (11). The non-supercharged engine and the head cover (2) can be made into a common part.
（請求項２に係る発明）
請求項１に係る発明の効果に加え、次の効果を奏する。
《効果》 前段ブリーザ室とブリーザ室のオイル分離機能が高い。
図２(Ａ)に例示するように、ブリーザ室(３)の下部にブリーザ室底壁(２９)を設け、このブリーザ室底壁(２９)にブリーザ室入口(２１)を設けたので、前段ブリーザ室(２８)のブローバイガス中のオイルミストは、ブリーザ室底壁(２９)の下面で凝縮し、オイル分離される。また、ブリーザ室(３)のブローバイガス中のオイルミストは、ブリーザ室底壁(２９)の上面で凝縮し、オイル分離される。このため、前段ブリーザ室(２８)とブリーザ室(３)のオイル分離機能が高い。
(Invention according to Claim 2)
In addition to the effect of the invention according to
<Effect> The oil separation function of the front breather chamber and the breather chamber is high.
As illustrated in FIG. 2A, a breather chamber bottom wall (29) is provided at the lower part of the breather chamber (3), and the breather chamber inlet (21) is provided in the breather chamber bottom wall (29). Oil mist in the blow-by gas in the breather chamber (28) is condensed on the lower surface of the bottom wall (29) of the breather chamber and separated into oil. The oil mist in the blow-by gas in the breather chamber (3) is condensed on the upper surface of the bottom wall (29) of the breather chamber and separated into oil. For this reason, the oil separation function of the pre-stage breather chamber (28) and the breather chamber (3) is high.
（請求項３に係る発明）
請求項２に係る発明の効果に加え、次の効果を奏する。
《効果》 ブリーザ室底壁のオイル分離機能が高い。
図２(Ｂ)〜(Ｅ)に例示するように、ブリーザ室入口(２１)の弁座周壁(１４)寄りの開口縁部(３０)からオイルガイド板(３１)を下り傾斜状に導出したので、ブリーザ室底壁(２９)の下面で凝縮したオイルのうち、ブリーザ室入口(２１)に接近するものは、オイルガイド板(３１)に沿って斜め下に案内され、オイルがブリーザ室入口(２１)からブリーザ室(３)内に連れ出される不具合が防止される。このため、ブリーザ室底壁(２９)のオイル分離機能が高い。
(Invention according to claim 3)
In addition to the effect of the invention according to
<Effect> The oil separation function of the breather chamber bottom wall is high.
As illustrated in FIGS. 2B to 2E, the oil guide plate (31) is led out downwardly from the opening edge (30) near the valve seat peripheral wall (14) of the breather chamber inlet (21). Therefore, among the oil condensed on the lower surface of the breather chamber bottom wall (29), the oil approaching the breather chamber inlet (21) is guided obliquely downward along the oil guide plate (31), and the oil is introduced into the breather chamber inlet. The problem of being taken out from (21) into the breather chamber (3) is prevented. For this reason, the oil separation function of the breather chamber bottom wall (29) is high.
（請求項４に係る発明）
請求項１から請求項３のいずれかに係る発明の効果に加え、次の効果を奏する。
《効果》 寒冷時のブリーザ室の氷結を抑制することができる。
図４に例示するように、排気管(３２)の上部に過給機(８)を配置するに当たり、ブリーザ室周壁(１２)をヘッドカバー(２)から上向きに突出させ、ブリーザパイプ(５)がブリーザ出口(４)から過給機(８)に向けて下り傾斜するようにしたので、ブリーザパイプ(５)内で水蒸気が凝縮しても、凝縮水が自重でブリーザ出口(４)に流れ込むことがない。このため、寒冷時のブリーザ室(３)の氷結を抑制することができる。
(Invention of Claim 4)
In addition to the effects of the invention according to any one of
<Effect> It is possible to suppress freezing in the breather chamber during cold weather.
As shown in FIG. 4, when the supercharger (8) is arranged on the upper part of the exhaust pipe (32), the breather chamber peripheral wall (12) protrudes upward from the head cover (2), and the breather pipe (5) Since it is inclined downward from the breather outlet (4) toward the supercharger (8), even if water vapor condenses in the breather pipe (5), the condensed water flows into the breather outlet (4) by its own weight. There is no. For this reason, freezing of the breather chamber (3) during cold weather can be suppressed.
本発明の実施の形態を図面に基づいて説明する。図１から図４は本発明の実施形態に係るエンジンのブリーザ装置を説明する図で、この実施形態では、ディーゼルエンジンのブリーザ装置について説明する。 Embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 4 are diagrams for explaining an engine breather device according to an embodiment of the present invention. In this embodiment, a breather device for a diesel engine will be described.
本発明の実施形態の概要は、次の通りである。
このエンジンは、図３に示すように、シリンダヘッド(１)の横一側に排気マニホルド(３６)を、横他側に吸気マニホルド(３７)をそれぞれ取り付け、シリンダヘッド(１)の上にヘッドカバー(２)を取り付け、このヘッドカバー(２)の上部にブリーザ室(３)を設け、このブリーザ室(３)のブリーザ出口(４)からブリーザパイプ(５)を導出し、このブリーザパイプ(５)の導出端部(６)を吸気経路(７)に接続している。具体的には、過給機(８)の吸気入口(９)にブリーザパイプ(５)の導出端部(６)を接続している。図３及び図４に示すように、過給機(８)の吸気出口(３８)から過給パイプ(３９)を導出し、過給パイプ(３９)の導出端(４０)を吸気マニホルド(３７)に接続している。
The outline of the embodiment of the present invention is as follows.
As shown in FIG. 3, this engine is provided with an exhaust manifold (36) on one side of the cylinder head (1) and an intake manifold (37) on the other side, and a head cover on the cylinder head (1). (2) is attached, a breather chamber (3) is provided at the top of the head cover (2), and a breather pipe (5) is led out from a breather outlet (4) of the breather chamber (3). Is connected to the intake passage (7). Specifically, the outlet end portion (6) of the breather pipe (5) is connected to the intake port (9) of the supercharger (8). As shown in FIGS. 3 and 4, the supercharging pipe (39) is led out from the intake outlet (38) of the supercharger (8), and the leading end (40) of the supercharging pipe (39) is connected to the intake manifold (37). ).
ブリーザ室の構成は、次の通りである。
図２(Ａ)に示すように、ヘッドカバー(２)の上部にブリーザ室取付座(１１)を設け、このブリーザ室取付座(１１)にブリーザ室周壁(１２)を着脱自在に取り付け、このブリーザ室周壁(１２)の上面に弁取付座(１３)を形成している。ブリーザ室周壁(１２)で囲まれたブリーザ室(３)内に弁座周壁(１４)を配置し、この弁座周壁(１４)の上面に弁座(１５)を形成し、弁取付座(１３)にダイヤフラム弁(１６)の周縁部(１７)を取り付け、このダイヤフラム弁(１６)の弁面(１８)を弁座(１５)に着座させている。弁座周壁(１４)とブリーザ室周壁(１２)との間にブリーザ通路周壁(１９)を架設し、ブリーザ室周壁(１２)にブリーザ出口(４)を設け、ブリーザ通路周壁(１９)内に弁座(１５)の弁口(１５ａ)からブリーザ出口(４)に至るブリーザ通路(２０)を設け、図２(Ｃ)〜(Ｅ)に示すように、ブリーザ室(３)の下部にブリーザ室入口(２１)を設けている。これにより、このブリーザ室入口(２１)からブリーザ室(３)に流入したブローバイガスが、弁座周壁(１４)とブリーザ通路周壁(１９)の周囲を浮上し、開弁した弁面(１８)と弁座(１５)との間を通過して、ブリーザ通路(２０)に流入する。
The configuration of the breather room is as follows.
As shown in FIG. 2A, a breather chamber mounting seat (11) is provided on the top of the head cover (2), and a breather chamber peripheral wall (12) is detachably mounted on the breather chamber mounting seat (11). A valve mounting seat (13) is formed on the upper surface of the chamber peripheral wall (12). A valve seat peripheral wall (14) is arranged in a breather chamber (3) surrounded by a breather chamber peripheral wall (12), a valve seat (15) is formed on the upper surface of the valve seat peripheral wall (14), and a valve mounting seat ( The peripheral edge portion (17) of the diaphragm valve (16) is attached to 13), and the valve surface (18) of the diaphragm valve (16) is seated on the valve seat (15). A breather passage peripheral wall (19) is installed between the valve seat peripheral wall (14) and the breather chamber peripheral wall (12), a breather outlet (4) is provided in the breather chamber peripheral wall (12), and the breather passage peripheral wall (19) is provided. A breather passage (20) from the valve opening (15a) of the valve seat (15) to the breather outlet (4) is provided, and as shown in FIGS. 2 (C) to (E), the breather chamber (3) has a breather at the lower part thereof. A chamber entrance (21) is provided. As a result, the blow-by gas flowing into the breather chamber (3) from the breather chamber inlet (21) floats around the valve seat peripheral wall (14) and the breather passage peripheral wall (19), and the valve surface (18) opened. And the valve seat (15) and flows into the breather passage (20).
前段ブリーザ室の構成は、次の通りである。
図２(Ａ)に示すように、ヘッドカバー(２)の上部に前段ブリーザ室周壁(１０)を設け、この前段ブリーザ室周壁(１０)の上部に上記ブリーザ室取付座(１１)を設けている。この前段ブリーザ室周壁(１０)で囲まれた前段ブリーザ室(２８)内に予備弁座周壁(２２)を配置し、この予備弁座周壁(２２)の上面に予備弁座(２３)を形成し、ブリーザ室取付座(１１)に前記ダイヤフラム弁(１６)を取り付けられるようにし、予備弁座(２３)は、ブリーザ室取付座(１１)に上記ダイヤフラム弁(１６)を取り付けた場合に、このダイヤフラム弁(１６)の弁面(１８)が着座できるようにしている。予備弁座周壁(２２)と前段ブリーザ室周壁(１０)との間に予備ブリーザ通路周壁(２４)を架設し、前段ブリーザ室周壁(１０)に予備ブリーザ出口(２５)を設け、予備ブリーザ通路周壁(２４)内に予備弁座(２３)の予備弁口(２３ａ)から予備ブリーザ出口(２５)に至る予備ブリーザ通路(２６)を設け、予備ブリーザ出口(２５)を着脱自在のプラグ(２７)で封止し、前段ブリーザ室(２８)の下部に前段ブリーザ室入口(３３)を設けている。
The configuration of the former breather chamber is as follows.
As shown in FIG. 2 (A), a front breather chamber peripheral wall (10) is provided at the top of the head cover (2), and the breather chamber mounting seat (11) is provided above the front breather chamber peripheral wall (10). . A preliminary valve seat peripheral wall (22) is disposed in the front stage breather chamber (28) surrounded by the front stage breather chamber peripheral wall (10), and a preliminary valve seat (23) is formed on the upper surface of the preliminary valve seat peripheral wall (22). The diaphragm valve (16) can be attached to the breather chamber mounting seat (11), and the spare valve seat (23) is installed when the diaphragm valve (16) is attached to the breather chamber mounting seat (11). The valve face (18) of the diaphragm valve (16) can be seated. A preliminary breather passage peripheral wall (24) is installed between the preliminary valve seat peripheral wall (22) and the front breather chamber peripheral wall (10), and a preliminary breather outlet (25) is provided on the front breather chamber peripheral wall (10). A spare breather passage (26) from the spare valve port (23a) of the spare valve seat (23) to the spare breather outlet (25) is provided in the peripheral wall (24), and the spare breather outlet (25) is detachably attached to the plug (27 ), And a front breather chamber inlet (33) is provided at the bottom of the front breather chamber (28).
これにより、この前段ブリーザ室入口(３３)から前段ブリーザ室(２８)に流入したブローバイガスが、予備弁座周壁(２２)と予備ブリーザ通路周壁(２４)の周囲を浮上し、ブリーザ室入口(２１)からブリーザ室(３)に流入する。また、ブリーザ室取付座(１１)からブリーザ室周壁(１２)を取り外した場合には、ブリーザ室取付座(１１)に前記ダイヤフラム弁(１６)を取り付け、このダイヤフラム弁(１６)の弁面(１８)を予備弁座(２３)に着座させ、予備ブリーザ出口(２５)のプラグ(２７)を外し、この予備ブリーザ出口(２７)からブリーザパイプ(５)を導出することによって、前段ブリーザ室(２８)をダイヤフラム弁(１６)を備えた単一のブリーザ室として用いることができるようになっている。これにより、この過給エンジンの前段ブリーザ室(２８)を、無過給エンジンのブリーザ室に転用することができ、無過給エンジンとヘッドカバーを共通部品化することができる。 As a result, blow-by gas that has flowed into the front breather chamber (28) from the front breather chamber inlet (33) floats around the preliminary valve seat peripheral wall (22) and the preliminary breather passage peripheral wall (24), and enters the breather chamber inlet ( 21) flows into the breather chamber (3). Further, when the breather chamber peripheral wall (12) is removed from the breather chamber mounting seat (11), the diaphragm valve (16) is mounted on the breather chamber mounting seat (11), and the valve surface of the diaphragm valve (16) ( 18) is seated on the preliminary valve seat (23), the plug (27) of the preliminary breather outlet (25) is removed, and the breather pipe (5) is led out from the preliminary breather outlet (27), whereby the front breather chamber ( 28) can be used as a single breather chamber with a diaphragm valve (16). Thereby, the front-stage breather chamber (28) of the supercharged engine can be diverted to the breather chamber of the non-supercharged engine, and the non-supercharged engine and the head cover can be made a common component.
図２(Ａ)に示すように、前段ブリーザ室(２８)の下部には前段ブリーザ室底壁(３４)を配置し、この前段ブリーザ室底壁(３４)とヘッドカバー天井壁(３５)との間の前後の開口を前段ブリーザ室入口(３３)としている。予備弁座周壁(２２)と予備ブリーザ通路周壁(２４)の下方にある部分は、ブリーザ室入口(２１)の下方にある部分よりも段落ちさせ、予備弁座周壁(２２)と予備ブリーザ通路周壁(２４)の底面との間に隙間を確保し、前段ブリーザ室入口(３３)から前段ブリーザ室(２８)内に流入したブローバイガスの一部が予備弁座周壁(２２)と予備ブリーザ通路周壁(２４)の底面に沿って流れ、これらの表面でオイルミストが凝縮できるようにしてある。 As shown in FIG. 2 (A), the front breather chamber bottom wall (34) is arranged at the lower part of the front breather chamber (28), and the front breather chamber bottom wall (34) and the head cover ceiling wall (35) are arranged. The front and rear openings are the front breather chamber entrance (33). The portion below the spare valve seat peripheral wall (22) and the spare breather passage peripheral wall (24) is stepped down from the portion below the breather chamber inlet (21), so that the spare valve seat peripheral wall (22) and the spare breather passage A gap is secured between the peripheral wall (24) and the bottom surface of the peripheral wall (24), and a part of the blow-by gas flowing into the front breather chamber (28) from the front breather chamber inlet (33) is part of the preliminary valve seat peripheral wall (22) and the preliminary breather passage. It flows along the bottom surface of the peripheral wall (24), and oil mist can be condensed on these surfaces.
他の工夫は、次の通りである。
図２(Ａ)〜(Ｅ)に示すように、ブリーザ室(３)の下部にブリーザ室底壁(２９)を設け、このブリーザ室底壁(２９)にブリーザ室入口(２１)を設けている。また、ブリーザ室入口(２１)の弁座周壁(１４)寄りの開口縁部(３０)からオイルガイド板(３１)を下り傾斜状に導出している。図２(Ｄ)(Ｅ)に示すように、ブリーザ室底壁(２９)は円板状で、その周縁の一部を２箇所、斜め下向きに折り曲げ、ブリーザ室入口(２１)とオイルガイド板(３１)を形成している。図２(Ａ)に示すように、このブリーザ室底壁(２９)は予備弁座(２３)の上に載せ、予備弁座(２３)の予備弁口(２３ａ)を塞いでいる。図２(Ｃ)に示すように、予備弁座周壁(２２)を間に挟んで、予備ブリーザ通路(２６)と反対側で、予備弁座周壁(２２)と前段ブリーザ室周壁(１０)との間にリブ(４１)を架設し、このリブ(４１)をオイルガイド板(３１)(３１)の間に挟み付けて、ブリーザ室底壁(２９)をヘッドカバー(２)に着脱自在に固定している。ブリーザ室底壁(２９)の周縁部を、ブリーザ室取付座(１１)とブリーザ室周壁(１２)との間に挟み付けることにより、ブリーザ室底壁(２９)を固定してもよい。図２(Ｃ)に示すように、予備弁座周壁(２２)と前段ブリーザ室周壁(１０)との間には、予備ブリーザ通路(２６)と直交する向きに２枚のリブ(４１)を架設している。また、図２(Ｂ)に示すように、弁座周壁(１４)とブリーザ室周壁(１２)との間には、弁座周壁(１４)を間に挟んで、ブリーザ通路(２０)と反対側に１枚のリブ(４２)を架設し、ブリーザ通路(２０)と直交する向きに２枚のリブ(４２)を架設している。
Other ideas are as follows.
As shown in FIGS. 2A to 2E, a breather chamber bottom wall (29) is provided at the lower part of the breather chamber (3), and a breather chamber inlet (21) is provided on the breather chamber bottom wall (29). Yes. Further, the oil guide plate (31) is led out downwardly from the opening edge (30) near the valve seat peripheral wall (14) of the breather chamber inlet (21). As shown in FIGS. 2 (D) and (E), the breather chamber bottom wall (29) has a disc shape, and a part of the periphery of the breather chamber is bent diagonally downward at two locations, and the breather chamber inlet (21) and the oil guide plate (31) is formed. As shown in FIG. 2A, the breather chamber bottom wall (29) is placed on the spare valve seat (23) and closes the spare valve port (23a) of the spare valve seat (23). As shown in FIG. 2C, the preliminary valve seat peripheral wall (22) and the front breather chamber peripheral wall (10) are disposed on the opposite side of the preliminary breather passage (26) with the preliminary valve seat peripheral wall (22) interposed therebetween. A rib (41) is installed between the oil guide plates (31) and (31), and the breather chamber bottom wall (29) is detachably fixed to the head cover (2). is doing. The breather chamber bottom wall (29) may be fixed by sandwiching the peripheral portion of the breather chamber bottom wall (29) between the breather chamber mounting seat (11) and the breather chamber peripheral wall (12). As shown in FIG. 2 (C), two ribs (41) are provided between the preliminary valve seat peripheral wall (22) and the front breather chamber peripheral wall (10) in a direction perpendicular to the preliminary breather passage (26). It is erected. Further, as shown in FIG. 2B, the valve seat peripheral wall (14) is sandwiched between the valve seat peripheral wall (14) and the breather chamber peripheral wall (12), and is opposite to the breather passage (20). One rib (42) is installed on the side, and two ribs (42) are installed in a direction perpendicular to the breather passage (20).
(１) シリンダヘッド
(２) ヘッドカバー
(３) ブリーザ室
(４) ブリーザ出口
(５) ブリーザパイプ
(６) 導出端部
(７) 吸気経路
(８) 過給機
(９) 吸気入口
(１０) 前段ブリーザ室周壁
(１１) ブリーザ室取付座
(１２) ブリーザ室周壁
(１３) 弁取付座
(１４) 弁座周壁
(１５) 弁座
(１５ａ) 弁口
(１６) ダイヤフラム弁
(１７) 周縁部
(１８) 弁面
(１９) ブリーザ通路周壁
(２０) ブリーザ通路
(２１) ブリーザ室入口
(２２) 予備弁座周壁
(２３) 予備弁座
(２３ａ) 予備弁口
(２４) 予備ブリーザ通路周壁
(２５) 予備ブリーザ出口
(２６) 予備ブリーザ通路
(２７) プラグ
(２８) 前段ブリーザ室
(２９) ブリーザ室底壁
(３０) 開口縁部
(３１) オイルガイド板
(３２) 排気管
(３３) 前段ブリーザ室入口
(1) Cylinder head
(2) Head cover
(3) Breezer room
(4) Breeza exit
(5) Breather pipe
(6) Outlet end
(7) Intake route
(8) Turbocharger
(9) Intake inlet
(10) Front breather room wall
(11) Breather chamber mounting seat
(12) Breezer room wall
(13) Valve mounting seat
(14) Valve seat wall
(15) Valve seat
(15a) Valve port
(16) Diaphragm valve
(17) Perimeter
(18) Valve face
(19) Breather passage wall
(20) Breezer passage
(21) Breezer room entrance
(22) Spare valve seat wall
(23) Spare valve seat
(23a) Spare valve port
(24) Spare breather passage wall
(25) Preliminary breather exit
(26) Spare breather passage
(27) Plug
(28) Front breather room
(29) Breezer room bottom wall
(30) Opening edge
(31) Oil guide plate
(32) Exhaust pipe
(33) Front breather room entrance
Claims (4)
過給機(８)の吸気入口(９)にブリーザパイプ(５)の導出端部(６)を接続するに当たり、
ヘッドカバー(２)の上部にブリーザ室取付座(１１)を設け、このブリーザ室取付座(１１)にブリーザ室周壁(１２)を着脱自在に取り付け、このブリーザ室周壁(１２)の上面に弁取付座(１３)を形成し、ブリーザ室周壁(１２)で囲まれたブリーザ室(３)内に弁座周壁(１４)を配置し、この弁座周壁(１４)の上面に弁座(１５)を形成し、弁取付座(１３)にダイヤフラム弁(１６)の周縁部(１７)を取り付け、このダイヤフラム弁(１６)の弁面(１８)を弁座(１５)に着座させ、弁座周壁(１４)とブリーザ室周壁(１２)との間にブリーザ通路周壁(１９)を架設し、ブリーザ室周壁(１２)にブリーザ出口(４)を設け、ブリーザ通路周壁(１９)内に弁座(１５)の弁口(１５ａ)からブリーザ出口(４)に至るブリーザ通路(２０)を設け、ブリーザ室(３)の下部にブリーザ室入口(２１)を設け、
このブリーザ室入口(２１)からブリーザ室(３)に流入したブローバイガスが、弁座周壁(１４)とブリーザ通路周壁(１９)の周囲を浮上し、開弁した弁面(１８)と弁座(１５)との間を通過して、ブリーザ通路(２０)に流入するようにし、
ヘッドカバー(２)の上部に前段ブリーザ室周壁(１０)を設け、この前段ブリーザ室周壁(１０)の上部に上記ブリーザ室取付座(１１)を設け、この前段ブリーザ室周壁(１０)で囲まれた前段ブリーザ室(２８)内に予備弁座周壁(２２)を配置し、この予備弁座周壁(２２)の上面に予備弁座(２３)を形成し、ブリーザ室取付座(１１)に前記ダイヤフラム弁(１６)を取り付けられるようにし、予備弁座(２３)は、ブリーザ室取付座(１１)に上記ダイヤフラム弁(１６)を取り付けた場合に、このダイヤフラム弁(１６)の弁面(１８)が着座できるようにし、予備弁座周壁(２２)と前段ブリーザ室周壁(１０)との間に予備ブリーザ通路周壁(２４)を架設し、前段ブリーザ室周壁(１０)に予備ブリーザ出口(２５)を設け、予備ブリーザ通路周壁(２４)内に予備弁座(２３)の予備弁口(２３ａ)から予備ブリーザ出口(２５)に至る予備ブリーザ通路(２６)を設け、予備ブリーザ出口(２５)を着脱自在のプラグ(２７)で封止し、前段ブリーザ室(２８)の下部に前段ブリーザ室入口(３３)を設け、
この前段ブリーザ室入口(３３)から前段ブリーザ室(２８)に流入したブローバイガスが、予備弁座周壁(２２)と予備ブリーザ通路周壁(２４)の周囲を浮上し、ブリーザ室入口(２１)からブリーザ室(３)に流入するようにし、
ブリーザ室取付座(１１)からブリーザ室周壁(１２)を取り外した場合には、ブリーザ室取付座(１１)に前記ダイヤフラム弁(１６)を取り付け、このダイヤフラム弁(１６)の弁面(１８)を予備弁座(２３)に着座させ、予備ブリーザ出口(２５)のプラグ(２７)を外し、この予備ブリーザ出口(２７)からブリーザパイプ(５)を導出することによって、前段ブリーザ室(２８)をダイヤフラム弁(１６)を備えた単一のブリーザ室として用いることができるようにした、ことを特徴とするエンジンのブリーザ装置。 A head cover (2) is mounted on the cylinder head (1), a breather chamber (3) is provided at the top of the head cover (2), and a breather pipe (5) is connected from a breather outlet (4) of the breather chamber (3). In the breather device for the engine, the lead-out end (6) of the breather pipe (5) is connected to the intake passage (7).
In connecting the outlet end (6) of the breather pipe (5) to the intake inlet (9) of the supercharger (8),
A breather chamber mounting seat (11) is provided on the upper part of the head cover (2), a breather chamber peripheral wall (12) is detachably mounted on the breather chamber mounting seat (11), and a valve is mounted on the upper surface of the breather chamber peripheral wall (12). A seat (13) is formed, a valve seat peripheral wall (14) is disposed in a breather chamber (3) surrounded by a breather chamber peripheral wall (12), and a valve seat (15) is disposed on the upper surface of the valve seat peripheral wall (14). The peripheral edge portion (17) of the diaphragm valve (16) is attached to the valve mounting seat (13), the valve face (18) of the diaphragm valve (16) is seated on the valve seat (15), and the valve seat peripheral wall (14) and a breather chamber peripheral wall (12), a breather passage peripheral wall (19) is installed, a breather outlet (4) is provided in the breather chamber peripheral wall (12), and a valve seat ( 15) A breather passage (20) from the valve port (15a) to the breather outlet (4) is provided, and the breather chamber inlet (21) is provided at the lower part of the breather chamber (3). Provided,
The blow-by gas that has flowed into the breather chamber (3) from the breather chamber inlet (21) floats around the valve seat peripheral wall (14) and the breather passage peripheral wall (19), and opens the valve surface (18) and valve seat. (15) to flow into the breather passage (20),
A front breather chamber peripheral wall (10) is provided above the head cover (2), and the breather chamber mounting seat (11) is provided above the front breather chamber peripheral wall (10), which is surrounded by the front breather chamber peripheral wall (10). A preliminary valve seat peripheral wall (22) is disposed in the front breather chamber (28), and a preliminary valve seat (23) is formed on the upper surface of the preliminary valve seat peripheral wall (22). When the diaphragm valve (16) is attached to the breather chamber attachment seat (11), the spare valve seat (23) can be attached to the valve face (18) of the diaphragm valve (16). ), A preliminary breather passage peripheral wall (24) is installed between the preliminary valve seat peripheral wall (22) and the front breather chamber peripheral wall (10), and a preliminary breather outlet (25) is provided on the front breather chamber peripheral wall (10). ) And the spare valve seat (23) is reserved in the spare breather passage peripheral wall (24). A spare breather passage (26) from the valve port (23a) to the spare breather outlet (25) is provided, and the spare breather outlet (25) is sealed with a detachable plug (27), and the lower part of the front breather chamber (28). The front breather chamber entrance (33),
The blow-by gas that has flowed into the front-stage breather chamber (28) from the front-stage breather chamber inlet (33) floats around the preliminary valve seat peripheral wall (22) and the preliminary breather passage peripheral wall (24), and from the breather chamber inlet (21). To flow into the breather chamber (3)
When the breather chamber peripheral wall (12) is removed from the breather chamber mounting seat (11), the diaphragm valve (16) is mounted on the breather chamber mounting seat (11), and the valve face (18) of the diaphragm valve (16). Is seated on the preliminary valve seat (23), the plug (27) of the preliminary breather outlet (25) is removed, and the breather pipe (5) is led out from the preliminary breather outlet (27), whereby the front-stage breather chamber (28). A breather device for an engine, characterized in that it can be used as a single breather chamber equipped with a diaphragm valve (16).
ブリーザ室(３)の下部にブリーザ室底壁(２９)を設け、このブリーザ室底壁(２９)にブリーザ室入口(２１)を設けた、ことを特徴とするエンジンのブリーザ装置。 The breather apparatus for an engine according to claim 1,
A breather device for an engine, wherein a breather chamber bottom wall (29) is provided at a lower portion of the breather chamber (3), and a breather chamber inlet (21) is provided on the breather chamber bottom wall (29).
ブリーザ室入口(２１)の弁座周壁(１４)寄りの開口縁部(３０)からオイルガイド板(３１)を下り傾斜状に導出した、ことを特徴とするエンジンのブリーザ装置。 The breather apparatus for an engine according to claim 2,
A breather device for an engine, characterized in that an oil guide plate (31) is led out downwardly from an opening edge (30) of the breather chamber inlet (21) near the valve seat peripheral wall (14).
排気管(３２)の上部に過給機(８)を配置するに当たり、
ブリーザ室周壁(１２)をヘッドカバー(２)から上向きに突出させ、ブリーザパイプ(５)がブリーザ出口(４)から過給機(８)に向けて下り傾斜するようにした、ことを特徴とするエンジンのブリーザ装置。 The breather apparatus for an engine according to any one of claims 1 to 3,
In placing the supercharger (8) above the exhaust pipe (32),
The breather chamber peripheral wall (12) protrudes upward from the head cover (2), and the breather pipe (5) is inclined downward from the breather outlet (4) toward the supercharger (8). Engine breather device.
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| JP6365310B2 (en) * | 2015-01-07 | 2018-08-01 | スズキ株式会社 | Internal combustion engine |
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| JP2002235520A (en) * | 2001-02-09 | 2002-08-23 | Yanmar Diesel Engine Co Ltd | Breather device of engine |
| JP2004116292A (en) * | 2002-09-24 | 2004-04-15 | Kubota Corp | Engine with supercharger |
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| JP2002235520A (en) * | 2001-02-09 | 2002-08-23 | Yanmar Diesel Engine Co Ltd | Breather device of engine |
| JP2004116292A (en) * | 2002-09-24 | 2004-04-15 | Kubota Corp | Engine with supercharger |
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