JPS62138830U

JPS62138830U -

Info

Publication number: JPS62138830U
Application number: JP2784386U
Authority: JP
Priority date: 1986-02-27
Filing date: 1986-02-27
Publication date: 1987-09-01

Description

[Brief explanation of the drawing]

第１図は、本考案のターボ過給機付エンジン概
略図である。第２図は、大、小容量ターボ過給機
の配列図であつて、Ａは横状並列配列図であり、
Ｂは対角状並列配列図であつて、そしてＣは、縦
状並列配列図である。第３図は、切換弁設置構造
図であつて、Ａは、１個の切換弁による構造図で
、Ｂは、２個の切換弁による構造図である。第４
図は、大小容量ターボ過給機が切換弁の操作で形
成する流量特性図である。第５図は、大、小容量
ターボ過給機による３つの流量特性を有したシス
テムの各種特性図である。第６図は、エンジンの
回転数に対する負荷の関係を示す特性図であつて
、Ａは、小容量ターボ過給機のみの運転領域を低
回転数高負荷領域のみとした特性図であり、Ｂは
、小容量ターボ過給機のみの運転領域を低回転高
負荷、低回転数及びアクセルＯＦＦ負荷領域とし
た特性図であつて、Ｃは、小容量ターボ過給機の
みの運転領域を低回転数高負荷、及びアクセルＯ
ＦＦ負荷領域とした特性図である。第７図は、従
来のターボ過給機付エンジン概略図である。第８
図は、従来の２つの流量特性を有したシステムの
各種特性図である。１……大容量ターボ過給機、１′……主ターボ
過給機、２……小容量ターボ過給機、２′……補
助ターボ過給機、３，３′……エンジン燃焼室、
４，４′……排気ガス、５，５′……排気ガス通
路、６，６′，１１，１１′……タービン、７，
７′，１２，１２′……コンプレツサー、８，８
′……給気通路、９，１０……切換弁、９′……
排気バイパス、１０′……バイパス弁、１３，１
４……逆止弁、１５……給気、１６……給気通路
。 FIG. 1 is a schematic diagram of the turbocharged engine of the present invention. FIG. 2 is an arrangement diagram of large and small capacity turbochargers, and A is a horizontal parallel arrangement diagram;
B is a diagonal parallel arrangement diagram, and C is a vertical parallel arrangement diagram. FIG. 3 is a diagram of a switching valve installation structure, in which A is a structural diagram of one switching valve and B is a structural diagram of two switching valves. Fourth
The figure is a flow rate characteristic diagram formed by large and small capacity turbo superchargers by operating switching valves. FIG. 5 is a diagram showing various characteristics of a system having three flow characteristics using large and small capacity turbochargers. FIG. 6 is a characteristic diagram showing the relationship between engine speed and load, in which A is a characteristic diagram in which the operating range of only a small capacity turbocharger is limited to a low revolution speed and high load region; is a characteristic diagram in which the operating range of only a small capacity turbocharger is low rotation, high load, low rotation speed, and accelerator OFF load range, and C is a characteristic diagram in which the operating range of only a small capacity turbocharger is set to low rotation and high load, low rotation speed, and the accelerator OFF load range. Number of high loads and accelerator O
It is a characteristic diagram in the FF load region. FIG. 7 is a schematic diagram of a conventional turbocharged engine. 8th
The figures are various characteristic diagrams of a conventional system having two flow characteristics. 1... Large capacity turbo supercharger, 1'... Main turbo supercharger, 2... Small capacity turbo supercharger, 2'... Auxiliary turbo supercharger, 3, 3'... Engine combustion chamber,
4, 4'... Exhaust gas, 5, 5'... Exhaust gas passage, 6, 6', 11, 11'... Turbine, 7,
7', 12, 12'... Compressor, 8, 8
'...Air supply passage, 9,10...Switching valve, 9'...
Exhaust bypass, 10'...Bypass valve, 13,1
4...Check valve, 15...Air supply, 16...Air supply passage.

Claims

[Scope of utility model registration request]

Turbo superchargers with large and small capacities are arranged in parallel, and an exhaust gas passage is provided between each turbine of the turbo supercharger and the combustion chamber of the engine via a switching valve. An air supply passage is provided through which air is supplied to the combustion chamber by the compressor via the check valve, and by controlling the opening and closing of the switching valve, it is possible to perform starting and low-speed, high-load areas by operating only the small-capacity turbocharger. A three-stage region is formed: a medium-speed, high-load region when only the capacity turbocharger is operated, and a high-speed, high-load region when both the large and small-capacity turbochargers are operated. A turbocharged engine that matches engine characteristics.