JPS6216730U

JPS6216730U -

Info

Publication number: JPS6216730U
Application number: JP10799985U
Authority: JP
Priority date: 1985-07-15
Filing date: 1985-07-15
Publication date: 1987-01-31

Description

[Brief explanation of the drawing]

第１図は、この考案の一実施例の概略構成図、
第２図と第３図はそれぞれ前記実施例における第
１の制御回路と第２の制御回路の回路構成図であ
る。第４図は機関の吸入空気流量と圧力比との関
係から本考案の効果を示した特性線図、第５図は
経過時間と吸気管圧力との関係から本考案の効果
を示した特性線図である。１……内燃機関、２……吸気通路、３……排気
通路、４……ターボ過給機、５……排気タービン
、６……吸気コンプレツサ、８……排気バイパス
通路、９……排気バイパス弁、１１……蓄圧器、
１２……補助吸気通路、１３……電磁弁、１４…
…アクセル位置センサ、１５……アクセルペダル
、１６……（第１の）制御回路、２１……補助排
気通路、２２……加圧空気通路、２３……ターボ
圧縮機、２４……補助タービン、２５……補助コ
ンプレツサ、２７……インタークーラ、３０……
排気導入通路、３１……三方電磁弁、３２……圧
力センサ、３３……（第２の）制御回路、４０…
…微分回路、４１……比較回路、４２……タイマ
ー、４３……ＡＮＤ回路、４４……駆動回路、５
０……増幅回路、５１……上限比較回路、５２…
…下限比較回路、５３……駆動回路。 FIG. 1 is a schematic diagram of an embodiment of this invention.
FIGS. 2 and 3 are circuit configuration diagrams of a first control circuit and a second control circuit, respectively, in the embodiment. Figure 4 is a characteristic line showing the effect of the present invention from the relationship between the intake air flow rate and pressure ratio of the engine, and Figure 5 is a characteristic line showing the effect of the present invention from the relationship between elapsed time and intake pipe pressure. It is a diagram. 1... Internal combustion engine, 2... Intake passage, 3... Exhaust passage, 4... Turbo supercharger, 5... Exhaust turbine, 6... Intake compressor, 8... Exhaust bypass passage, 9... Exhaust bypass Valve, 11...Pressure accumulator,
12... Auxiliary intake passage, 13... Solenoid valve, 14...
... accelerator position sensor, 15 ... accelerator pedal, 16 ... (first) control circuit, 21 ... auxiliary exhaust passage, 22 ... pressurized air passage, 23 ... turbo compressor, 24 ... auxiliary turbine, 25...Auxiliary compressor, 27...Intercooler, 30...
Exhaust introduction passage, 31... Three-way solenoid valve, 32... Pressure sensor, 33... (second) control circuit, 40...
... Differentiation circuit, 41 ... Comparison circuit, 42 ... Timer, 43 ... AND circuit, 44 ... Drive circuit, 5
0...Amplification circuit, 51...Upper limit comparison circuit, 52...
...lower limit comparison circuit, 53...drive circuit.

Claims

[Scope of utility model registration request]

In a turbocharger comprising an exhaust turbine interposed in the middle of an engine exhaust passage, and an intake compressor located in the middle of the engine intake passage to pressurize the engine intake air based on the rotational force of the exhaust turbine, the exhaust passage an auxiliary exhaust passage independent of the auxiliary exhaust passage; an auxiliary turbine located in the middle of the auxiliary exhaust passage to generate rotational force; an auxiliary compressor that pressurizes air based on the rotational force of the auxiliary turbine; a pressure accumulator that stores pressurized air; an auxiliary intake passage that communicates the pressure accumulator with an intake passage downstream of the intake compressor; an exhaust introduction passage that communicates the exhaust passage with an auxiliary exhaust passage upstream of the auxiliary exhaust turbine; A first valve device located in the middle of the auxiliary intake passage to open and close the passage; and a first valve device located at a branching point between the auxiliary exhaust passage and the exhaust introduction passage to direct exhaust to the auxiliary turbine side or to the exhaust introduction passage and exhaust passage side. a second valve device that is selectively introduced; a first control device that detects the acceleration state and controls the first valve device; and a second control device that detects the internal pressure of the pressure accumulator and controls the second valve device. The first control device is configured to open the first valve device for a predetermined period of time in a predetermined acceleration state, and the second control device is configured to open the first valve device for a predetermined period of time when the accumulator is in a predetermined acceleration state. The internal combustion engine is characterized in that the second valve device is configured to switch and drive the exhaust gas to the exhaust gas introduction passage when the internal pressure is lower than a predetermined lower limit value, and to the auxiliary turbine when the internal pressure is lower than a predetermined lower limit value. Engine turbocharger.