JPS63121755U - - Google Patents

Description

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

第１〜７図はこの考案の実施例を示し、第１図
は過給機付内燃機関におけるＥＧＲ装置の概略図
、第２図はＥＧＲ装置の概略説明図、第３図は絞
り弁開度と負圧との関係を示す図、第４図ａはこ
の実施例におけるＥＧＲ調整弁の作動圧力範囲を
示す図、第４図ｂは従来のＥＧＲ調整弁の作動圧
力範囲を示す図、第５図は絞り弁開度に応じて圧
力制御弁を作動制御する説明図、第６図は絞り弁
開度とＥＧＲ量との関係を示すグラフ図、第７図
は車速とＥＧＲ率との関係を示すグラフ図である
。第８図はこの考案の他の実施例を示し、ＥＧＲ
装置の概略図である。第９図は従来のＥＧＲ装置
の概略図である。 図において、２は内燃機関、４は過給機、６は
給気通路、８は絞り弁、１０は排気通路、１８は
ＥＧＲ通路、２０はＥＧＲ調整弁、３０は第１圧
力室、３２は第２圧力室、３６は第１圧力通路、
４０は第２圧力通路、４２はバイパス通路、４４
は圧力調整弁、そして４６は制御部である。 Figures 1 to 7 show examples of this invention, Figure 1 is a schematic diagram of an EGR device in a supercharged internal combustion engine, Figure 2 is a schematic explanatory diagram of the EGR device, and Figure 3 is a throttle valve opening. FIG. 4a is a diagram showing the operating pressure range of the EGR regulating valve in this embodiment. FIG. 4b is a diagram showing the operating pressure range of the conventional EGR regulating valve. The figure is an explanatory diagram for controlling the operation of the pressure control valve according to the throttle valve opening degree, Figure 6 is a graph diagram showing the relationship between the throttle valve opening degree and EGR amount, and Figure 7 is a graph diagram showing the relationship between vehicle speed and EGR rate. FIG. FIG. 8 shows another embodiment of this invention, in which the EGR
FIG. 2 is a schematic diagram of the device. FIG. 9 is a schematic diagram of a conventional EGR device. In the figure, 2 is an internal combustion engine, 4 is a supercharger, 6 is an air supply passage, 8 is a throttle valve, 10 is an exhaust passage, 18 is an EGR passage, 20 is an EGR adjustment valve, 30 is a first pressure chamber, and 32 is a a second pressure chamber, 36 a first pressure passage;
40 is a second pressure passage, 42 is a bypass passage, 44
is a pressure regulating valve, and 46 is a control section.

Claims (1)

【実用新案登録請求の範囲】 １ 過給機付内燃機関のＥＧＲ通路途中にＥＧＲ
量を調整するＥＧＲ調整弁を設け、このＥＧＲ調
整弁を作動させる圧力応動体の一側に区画形成さ
れた第１圧力室に絞り弁開度に応じた吸気管圧力
信号を導く第１圧力通路を設けるとともに前記圧
力応動体の他側に区画形成された第２圧力室には
前記給気通路の絞り弁上流側の正圧信号を導く第
２圧力通路を設け、前記第１圧力通路と前記第２
圧力通路とを連通すべくバイパス通路を設けると
ともにこのバイパス通路途中には前記過給機付内
燃機関の運転状態に応じＥＧＲ量を調整すべく前
記バイパス通路を開閉し前記第１圧力室と第２圧
力室との圧力差を制御する圧力制御弁を設けたこ
とを特徴とするターボ車のＥＧＲ装置。 ２ 前記第１圧力通路は、前記第１圧力室と前記
バイパス通路の接続部位間に第１絞り部を有する
第１圧力通路である実用新案登録請求の範囲第１
項記載のターボ車のＥＧＲ装置。 ３ 前記第２圧力通路は、前記第２圧力室と前記
バイパス通路の接続部位間に第２絞り部を有する
第２圧力通路である実用新案登録請求の範囲第１
項記載のターボ車のＥＧＲ装置。[Scope of claim for utility model registration] 1 EGR in the EGR passage of an internal combustion engine with a supercharger
A first pressure passage that is provided with an EGR adjustment valve that adjusts the amount of EGR, and that guides an intake pipe pressure signal according to the opening degree of the throttle valve to a first pressure chamber defined on one side of a pressure-responsive body that operates the EGR adjustment valve. A second pressure chamber defined on the other side of the pressure-responsive body is provided with a second pressure passage for guiding a positive pressure signal on the upstream side of the throttle valve in the air supply passage; Second
A bypass passage is provided to communicate with the pressure passage, and in the middle of this bypass passage, the bypass passage is opened and closed to adjust the EGR amount according to the operating state of the supercharged internal combustion engine, and the first pressure chamber and the second pressure chamber are connected to each other. An EGR device for a turbo vehicle, characterized in that it is equipped with a pressure control valve that controls the pressure difference between the pressure chamber and the pressure chamber. 2. Utility model registration claim 1, wherein the first pressure passage is a first pressure passage having a first constriction portion between the connection portion of the first pressure chamber and the bypass passage.
The EGR device for a turbo vehicle as described in section. 3. Utility model registration claim 1, wherein the second pressure passage is a second pressure passage having a second constriction portion between the connection portion of the second pressure chamber and the bypass passage.
The EGR device for a turbo vehicle as described in section.