JPH0347433U

JPH0347433U -

Info

Publication number: JPH0347433U
Application number: JP10782789U
Authority: JP
Priority date: 1989-09-14
Filing date: 1989-09-14
Publication date: 1991-05-02

Description

[Brief explanation of the drawing]

第１図は、本考案にかかる燃焼制御装置を備え
た過給機付デイーゼルエンジンの側面説明図であ
る。第２図は、第１図に示すデイーゼルエンジン
のシステム構成図である。第３図は、第１図に示
すデイーゼルエンジンに設けられるアクチユエー
タの縦断面説明図である。第４図は第１図に示す
デイーゼルエンジンに設けられたバキユームポン
プから発生する負圧の高度に対する特性を示した
図である。第５図は、第１図に示すデイーゼルエ
ンジンの過給機の過給圧のエンジン回転数に対す
る特性を、高度をパラメータとして示した図であ
る。第６図は、従来のアクチユエータの縦断面説
明図である。第７図は、従来の過給機の過給圧の
エンジン回転数に対する特性を、高度をパラメー
タとして示した図である。１……デイーゼルエンジン、２……共通吸気通
路、５……共通排気通路、６……過給機（排気タ
ーボ式）、７……タービン、９……ポンプ、１２
……バイパス排気通路、１３……ウエストゲート
バルブ、１５……アクチユエータ、１８……バキ
ユームポンプ、２２……第１ダイヤフラム、２９
……第２ダイヤフラム、３０……負圧室、３２…
…第２スプリング、３４……第１スプリング。 FIG. 1 is an explanatory side view of a supercharged diesel engine equipped with a combustion control device according to the present invention. FIG. 2 is a system configuration diagram of the diesel engine shown in FIG. 1. FIG. 3 is an explanatory longitudinal cross-sectional view of an actuator provided in the diesel engine shown in FIG. 1. FIG. 4 is a diagram showing the characteristics of the negative pressure generated from the vacuum pump provided in the diesel engine shown in FIG. 1 with respect to altitude. FIG. 5 is a diagram showing the characteristics of the supercharging pressure of the supercharger of the diesel engine shown in FIG. 1 with respect to the engine rotation speed, using altitude as a parameter. FIG. 6 is an explanatory longitudinal cross-sectional view of a conventional actuator. FIG. 7 is a diagram showing the characteristics of the boost pressure of a conventional supercharger with respect to the engine rotation speed, using altitude as a parameter. 1... Diesel engine, 2... Common intake passage, 5... Common exhaust passage, 6... Supercharger (exhaust turbo type), 7... Turbine, 9... Pump, 12
... Bypass exhaust passage, 13 ... Waste gate valve, 15 ... Actuator, 18 ... Vacuum pump, 22 ... First diaphragm, 29
...Second diaphragm, 30...Negative pressure chamber, 32...
...Second spring, 34...First spring.

Claims

[Claims for Utility Model Registration] An exhaust turbo supercharger including a turbine disposed in an exhaust passage, a pump disposed in an intake passage and driven by the turbine, and a bypass exhaust passage that communicates the exhaust passage with the exhaust passage downstream of the turbine; a waste gate valve that opens and closes the bypass exhaust passage; and a waste gate valve that opens and closes the bypass exhaust passage when the boost pressure is higher than the pressure corresponding to the set load. In a diesel engine equipped with an actuator that suppresses a rise in pressure and a vacuum pump that generates negative pressure, the actuator is provided with a negative pressure chamber into which the negative pressure of the vacuum pump is introduced, and the negative pressure is introduced into the negative pressure chamber. 1. A combustion control device for a supercharged diesel engine, comprising a set load correction means for increasing a set load of an actuator as the absolute value of the negative pressure is smaller.