JPH053712Y2 - - Google Patents
Info
- Publication number
- JPH053712Y2 JPH053712Y2 JP1983044413U JP4441383U JPH053712Y2 JP H053712 Y2 JPH053712 Y2 JP H053712Y2 JP 1983044413 U JP1983044413 U JP 1983044413U JP 4441383 U JP4441383 U JP 4441383U JP H053712 Y2 JPH053712 Y2 JP H053712Y2
- Authority
- JP
- Japan
- Prior art keywords
- intake port
- accumulation chamber
- opening
- pressure accumulation
- valve
- 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.)
- Expired - Lifetime
Links
- 238000009825 accumulation Methods 0.000 claims description 14
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Description
【考案の詳細な説明】
直接噴射式デイーゼル機関の吸気ポートにおけ
る空気の流れは吸気弁が開かれることにより始ま
り、吸気ポートの形状に従つて所期のスワールが
燃焼室内に発生される。DETAILED DESCRIPTION OF THE INVENTION The air flow in the intake port of a direct injection diesel engine begins with the opening of the intake valve, and a desired swirl is generated in the combustion chamber according to the shape of the intake port.
本案は、吸気弁が閉じられる瞬間に吸気弁の直
前にある空気が可成り大きな流速をもつ状態より
流速が０の状態に移行することにより無効のもの
とされる速度エネルギの利用を意図し、以下図に
ついて説明する如く、速度ヘツドを圧力ヘツドに
変換する室を設け、この室に一時的に蓄えられた
エネルギが次の吸気工程において放出されて、そ
れがスワールの生成に有効に作用されて吸入効率
が向上されるようにするものである。 This proposal is intended to utilize the velocity energy that is rendered ineffective by shifting from a state where the air immediately in front of the intake valve has a considerably high flow velocity to a state where the flow velocity is 0 at the moment the intake valve is closed. As explained in the figure below, a chamber is provided to convert the velocity head into a pressure head, and the energy temporarily stored in this chamber is released during the next intake stroke, and it is effectively used to generate a swirl. This is to improve inhalation efficiency.
第１図および第２図において、１は吸気ポー
ト、２は吸気弁、３は本案により吸気ポート１に
付設された蓄圧室、４はこの蓄圧室３の開閉弁
（蓄圧室弁）である。蓄圧室弁４は吸気弁２より
僅か遅れて機械的または電磁的手段により開閉さ
れる。第３図は吸気弁２の開閉時期に対する蓄圧
室弁４の開閉時期の遅れ量ａを示す。 In FIGS. 1 and 2, 1 is an intake port, 2 is an intake valve, 3 is a pressure accumulation chamber attached to the intake port 1 according to the present invention, and 4 is an on-off valve (pressure accumulation chamber valve) for this pressure accumulation chamber 3. The pressure accumulator valve 4 is opened and closed slightly later than the intake valve 2 by mechanical or electromagnetic means. FIG. 3 shows the delay amount a of the opening/closing timing of the pressure accumulator valve 4 with respect to the opening/closing timing of the intake valve 2.
蓄圧室３は、吸気弁２が閉じられた際に起る速
度ヘツドの圧力ヘツドへの移行による吸気ポート
内の圧力上昇を利用して上昇された圧力の空気を
一時的に捕捉し、それを次の吸気工程の初期にお
いて放出する。蓄圧室３より放出される空気がス
ワールの生成に関してプラスに作用するようにす
るため、蓄圧室３の内部空間５の吸気ポート１と
の間の流路６の方向は、第２図の点線矢印７で示
す如く吸気ポート１内における空気のヘリカル流
８を加速する方向に選定されている。蓄圧室３は
多くの部分をシリンダヘツド９内に進入させて設
けることができ、その場合、上記の流路６は長さ
の短かいものとされる。 The pressure accumulator 3 takes advantage of the pressure increase in the intake port due to the transition of the velocity head to the pressure head that occurs when the intake valve 2 is closed, and temporarily captures the air at the increased pressure, and stores it. It is released at the beginning of the next intake stroke. In order to make the air released from the pressure accumulation chamber 3 have a positive effect on the generation of swirl, the direction of the flow path 6 between the internal space 5 of the pressure accumulation chamber 3 and the intake port 1 is determined by the dotted line arrow in FIG. As shown by 7, the direction is selected to accelerate the helical flow 8 of air within the intake port 1. The pressure accumulator 3 can be provided with many parts extending into the cylinder head 9, in which case the above-mentioned flow path 6 is made short in length.
従来の機関の場合、吸気ポートが閉じられる
と、吸気ポート内の空気の流動が止まり、空気の
もつていた速度エネルギは無効のものとならざる
を得なかつたのであるが、上記本案による吸気ポ
ート部を具えた機関においては無効なものとなる
べき速度エネルギの多くの部分が蓄圧室３におい
て圧力エネルギとして一時的に蓄えられ、さきに
説明したように、それが次の吸入行程において有
効に利用されるのである。 In the case of conventional engines, when the intake port was closed, the flow of air within the intake port stopped and the velocity energy of the air had to become invalid, but with the intake port according to the above-mentioned invention, In an engine equipped with a large number of pumps, a large portion of the velocity energy that would otherwise be ineffective is temporarily stored as pressure energy in the pressure storage chamber 3, and as explained earlier, it can be used effectively in the next suction stroke. It will be done.
第１図は本案による吸気ポート部の垂直断面
図、第２図は第１図に示すものの吸気ポートと蓄
圧室との関係を断面をとりつつ示す平面図、第３
図は第１図および第２図に示すものにおける吸気
弁の開閉時期と蓄圧室の開閉時期との関係を示す
線図である。
１……吸気ポート、２……吸気弁、３……蓄圧
室、４……蓄圧室の開閉弁、５……蓄圧室の内部
空間、６……吸気ポートと蓄圧室との間の流路、
７……蓄圧室内の空気の放出方向、８……吸気ポ
ート内のヘリカル流、９……シリンダヘツド。
Fig. 1 is a vertical sectional view of the intake port section according to the present invention, Fig. 2 is a plan view showing the relationship between the intake port and the pressure accumulator shown in Fig. 1 with a cross section taken, and Fig. 3
The figure is a diagram showing the relationship between the opening/closing timing of the intake valve and the opening/closing timing of the pressure accumulator in what is shown in FIGS. 1 and 2. 1...Intake port, 2...Intake valve, 3...Pressure accumulation chamber, 4...Opening/closing valve of the pressure accumulation chamber, 5...Internal space of the pressure accumulation chamber, 6...Flow path between the intake port and the pressure accumulation chamber ,
7... Direction of release of air in the pressure accumulation chamber, 8... Helical flow in the intake port, 9... Cylinder head.
Claims (1)
蓄圧室３を設け、吸気弁２が閉じる時点より蓄圧
室３の開閉弁４が閉じる時点までの間において蓄
圧室３内に捕捉された空気が蓄圧室３の開閉弁４
が開くことにより吸気ポート１内に放出される方
向７を、吸気ポート１に生じる空気のヘリカル流
８を加速する方向に選定したことを特徴とする、
直接噴射式デイーゼル機関の吸気ポート部。 A pressure accumulation chamber 3 is provided that opens and closes slightly later than the opening and closing timing of the intake valve 2, and the air trapped in the pressure accumulation chamber 3 is removed between the time when the intake valve 2 closes and the time when the opening/closing valve 4 of the pressure accumulation chamber 3 closes. Opening/closing valve 4 of pressure accumulation chamber 3
The direction 7 in which the air is released into the intake port 1 by opening is selected to accelerate the helical flow 8 of air generated in the intake port 1.
Intake port of direct injection diesel engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4441383U JPS59150946U (en) | 1983-03-28 | 1983-03-28 | Intake port of direct injection diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4441383U JPS59150946U (en) | 1983-03-28 | 1983-03-28 | Intake port of direct injection diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59150946U JPS59150946U (en) | 1984-10-09 |
| JPH053712Y2 true JPH053712Y2 (en) | 1993-01-28 |
Family
ID=30174945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4441383U Granted JPS59150946U (en) | 1983-03-28 | 1983-03-28 | Intake port of direct injection diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59150946U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5627026A (en) * | 1979-08-09 | 1981-03-16 | Yamaha Motor Co Ltd | Suction device of engine |
| JPS5823220A (en) * | 1981-08-04 | 1983-02-10 | Yamaha Motor Co Ltd | Suction device of internal combustion engine |
-
1983
- 1983-03-28 JP JP4441383U patent/JPS59150946U/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5627026A (en) * | 1979-08-09 | 1981-03-16 | Yamaha Motor Co Ltd | Suction device of engine |
| JPS5823220A (en) * | 1981-08-04 | 1983-02-10 | Yamaha Motor Co Ltd | Suction device of internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59150946U (en) | 1984-10-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4228772A (en) | Low throttled volume engine | |
| JPS6060010B2 (en) | Intake system for multi-cylinder internal combustion engine | |
| JPS55119911A (en) | Combustion chamber of compression firing internal combustion engine | |
| JPH053712Y2 (en) | ||
| JP2662799B2 (en) | Engine intake control device | |
| JP3004323B2 (en) | In-cylinder injection two-stroke engine | |
| JPH0232823Y2 (en) | ||
| JPH0696977B2 (en) | Engine air blower | |
| JPS6014905Y2 (en) | Internal combustion engine starting accelerator | |
| JPS5840299Y2 (en) | Internal combustion engine air cleaner | |
| JPH0138261Y2 (en) | ||
| JP2909588B2 (en) | Combustion chamber of multi-valve engine | |
| JPS6023463Y2 (en) | Diesel engine fuel injection nozzle device | |
| JPH0584373B2 (en) | ||
| JPS6137790Y2 (en) | ||
| JP2000282867A (en) | Internal combustion engine | |
| JPS6242101Y2 (en) | ||
| JPS6218663Y2 (en) | ||
| JPH0379534B2 (en) | ||
| JPH0433378Y2 (en) | ||
| JPH075247Y2 (en) | diesel engine | |
| JPS5941292Y2 (en) | Supercharged engine fuel supply system | |
| JPH0521631Y2 (en) | ||
| JPS6323544Y2 (en) | ||
| JPH0337015B2 (en) |