JPS6378130U - - Google Patents

Description

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

第１図は本考案の実施例の平面図、第２図は同
上実施例におけるＥＣＵに入力するマツプを示す
線図、第３図は同上実施例における第１及び第２
のスロツトル弁のエンジン加速時における開度の
変化を示す線図、第４図はエンジン加速時の第２
のスロツトル弁の制御動作を示すフローチヤート
、第５図は、本考案以前に本出願人の開発した複
吸気弁エンジンの平面図、第６図は同上装置の第
１及び第２のスロツトル弁の開度とエンジン負荷
との関係を示す線図、第７図は同じく本出願人の
開発した他の複吸気弁エンジンの第１及び第２の
スロツトル弁の開度とエンジン負荷との関係を示
す線図である。 １…第１吸気通路、２…第１スロツトル弁、３
…第１吸気ポート、４…第２吸気ポート、５…第
２吸気通路、６…第２スロツトル弁、７…第３吸
気ポート、１０…第１吸気弁、１１…燃焼室、１
２…第２吸気弁、１３…吸気制御弁、１４…第３
吸気弁、１５…燃料噴射弁、１６…点火栓、１９
…スロツトル開度センサ、２０…ＥＣＵ、２１…
スロツトルアクチエータ。 Fig. 1 is a plan view of an embodiment of the present invention, Fig. 2 is a diagram showing a map input to the ECU in the above embodiment, and Fig. 3 is a diagram showing the map input to the ECU in the above embodiment.
Figure 4 is a diagram showing the change in the opening degree of the throttle valve during engine acceleration.
FIG. 5 is a plan view of a dual intake valve engine developed by the applicant prior to the invention of the present invention, and FIG. 6 is a flow chart showing the control operation of the throttle valve of the same device. A diagram showing the relationship between the opening degree and the engine load, and FIG. 7 shows the relationship between the opening degree and the engine load of the first and second throttle valves of another dual intake valve engine also developed by the present applicant. It is a line diagram. 1...First intake passage, 2...First throttle valve, 3
...first intake port, 4...second intake port, 5...second intake passage, 6...second throttle valve, 7...third intake port, 10...first intake valve, 11...combustion chamber, 1
2...Second intake valve, 13...Intake control valve, 14...Third
Intake valve, 15...Fuel injection valve, 16...Ignition plug, 19
...Throttle opening sensor, 20...ECU, 21...
Throttle actuator.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 燃焼室内へ供給する吸気にスワールを発生させ
る常時開放の第１の吸気ポートと、エンジンの高
負荷運転域においてのみ開放する吸気制御弁を有
しかつ燃焼室内にストレートの吸気を供給する第
２の吸気ポートと、燃料噴射弁を設けた第３の吸
気ポートとを具備し、これら第１、第２及び第３
の各吸気ポートを、第１、第２及び第３の吸気弁
を介して燃焼室にそれぞれ開口し、前記第３の吸
気弁の開弁時期は前記第１の吸気弁の開弁時期よ
り遅らせるようにし、また、前記第１及び第２の
吸気ポートの上流側を共に第１の吸気通路に連通
させ、前記第３の吸気ポートの上流側を第２の吸
気通路に連通させ、前記第１の吸気通路に第１の
スロツトル弁を、前記第２の吸気通路に第２のス
ロツトル弁をそれぞれ設け、エンジンの低負荷時
における前記第１のスロツトル弁の開度を前記第
２のスロツトル弁の開度より大きく設定した複吸
気弁エンジンにおいて、エンジンの加速開始時に
前記第２のスロツトル弁の開度を一時的に所定時
間前記第１のスロツトル弁の開度より大きくした
ことを特徴とする複吸気弁エンジン。 A first intake port that is always open to generate a swirl in the intake air supplied into the combustion chamber, and a second intake port that has an intake control valve that opens only in a high-load operating range of the engine and supplies straight intake air into the combustion chamber. It comprises an intake port and a third intake port provided with a fuel injection valve, and these first, second and third intake ports are provided.
each intake port is opened to the combustion chamber via a first, second, and third intake valve, and the opening timing of the third intake valve is later than the opening timing of the first intake valve. Further, upstream sides of the first and second intake ports are both communicated with the first intake passage, an upstream side of the third intake port is communicated with the second intake passage, and the first intake port is configured to communicate with the first intake passage. A first throttle valve is provided in the intake passage, and a second throttle valve is provided in the second intake passage. In a double intake valve engine whose opening is set larger than the opening of the first throttle valve, the opening of the second throttle valve is temporarily set to be larger than the opening of the first throttle valve for a predetermined period of time when the engine starts accelerating. intake valve engine.