JPS63150048U

JPS63150048U -

Info

Publication number: JPS63150048U
Application number: JP4170087U
Authority: JP
Priority date: 1987-03-20
Filing date: 1987-03-20
Publication date: 1988-10-03

Description

[Brief explanation of the drawing]

第１図は本考案の基本概念図、第２〜８図は本
考案に係る過給機付圧縮比可変式内燃機関の一実
施例を示す図であり、第２図はその全体構成図、
第３図はその圧縮比可変機構の要部断面図、第４
図はその圧縮比制御のプログラムを示すフローチ
ヤート、第５図はその過給圧制御のプログラムを
示すフローチヤート、第６図はその圧縮比とスロ
ツトル開度との関係を示すテーブルマツプ、第７
図はその目標過給圧力と圧縮比との関係を示すテ
ーブルマツプ、第８図はその給気バイパス弁の制
御量とスロツトル開度との関係を示すテーブルマ
ツプである。１……エンジン、７……ルーツポンプ式過給機
、１７……圧力センサ（過給圧検出手段）、１９
……運転状態検出手段、２１……位置センサ（圧
縮比検出手段）、２２……過給圧可変手段、３０
……コントロールユニツト（第１目標設定手段、
圧縮比制御手段、第２目標設定手段、過給圧制御
手段）、５１……圧縮比可変手段。 FIG. 1 is a basic conceptual diagram of the present invention, FIGS. 2 to 8 are diagrams showing an embodiment of a variable compression ratio internal combustion engine with a supercharger according to the present invention, and FIG. 2 is an overall configuration diagram thereof,
Figure 3 is a sectional view of the main part of the variable compression ratio mechanism, Figure 4
Figure 5 is a flowchart showing the compression ratio control program, Figure 5 is a flowchart showing the boost pressure control program, Figure 6 is a table map showing the relationship between the compression ratio and throttle opening, and Figure 7 is a table map showing the relationship between the compression ratio and throttle opening.
The figure is a table map showing the relationship between the target boost pressure and the compression ratio, and FIG. 8 is a table map showing the relationship between the control amount of the air supply bypass valve and the throttle opening. 1... Engine, 7... Roots pump supercharger, 17... Pressure sensor (supercharging pressure detection means), 19
... Operating state detection means, 21 ... Position sensor (compression ratio detection means), 22 ... Boosting pressure variable means, 30
...control unit (first goal setting means,
compression ratio control means, second target setting means, supercharging pressure control means), 51...compression ratio variable means.

Claims

[Scope of Claim for Utility Model Registration] (a) Operating state detection means for detecting the operating state of the engine; (b) Compression ratio detection means for detecting the compression ratio of the engine; (c) Detecting the supercharging pressure of intake air. (d) first target setting means for setting a target value of the compression ratio according to the operating state of the engine; compression ratio control means for calculating a control value for controlling the operation of the compression ratio variable means so as to reach a target value; (f) compression ratio variable means for changing the compression ratio of the engine based on the output of the compression ratio control means; (g) a second target setting means for setting a target value of boost pressure according to the compression ratio of the engine; and (h) a second target setting means for setting the boost pressure to a predetermined target value based on the output of the boost pressure detection means. (i) a boost pressure variable means that changes the boost pressure of intake air based on the output of the boost pressure control means; A variable compression ratio internal combustion engine equipped with a supercharger.