JPS63201319A - Twin turbosupercharger - Google Patents

Abstract

PURPOSE:To make the captioned turbosupercharger compact and improve supercharging efficiency by housing two large and small turbosuperchargers in parallel in one housing and providing flow-in ports and flow-out ports for compressors and exhaust gas respectively, on said housing. CONSTITUTION:A twin turbosupercharger 8 is formed by housing two large and small superchargers 12, 13 consisting of compressors 12a, 13a and turbines 12b, 13b respectively in one housing 14. And, a pressurized air from one compressor 13a is introduced out of a discharge port 8e2 toward the other compressor 12a and, after being made confluent with a pressurized air discharged out of the other discharge port 8e1, fed into an engine. On the other hand, a flow-in port 8f for exhaust gas is provided on the turbine 12b, 13b side of the housing 14, and exhaust gas through the flow-in port 8f is fed into the turbines 12b, 13b via separate flow-in ports 8f1, 8f2 partitioned by a distribution wall 16 formed in the middle.

Description

[Detailed description of the invention]

[Industrial Application IIF1] The present invention relates to a twin turbo supercharger in which two large and small superchargers are arranged in one supercharger housing. [Prior Art] Conventionally, as shown in Japanese Utility Model Application Laid-open No. 59-70031, a high-pressure side exhaust turbine and a low-pressure side exhaust turbine are installed in series, respectively. There is a type in which a low-pressure side exhaust turbine is connected and fixed with bolts downstream of a high-pressure side exhaust turbine. Furthermore, as shown in Japanese Utility Model Application Publication No. 55-112020, at least two superchargers are provided adjacent to each other, and exhaust gas supplied from separate exhaust gas supply ports is fed into one exhaust vent. There is something that merges and is discharged outside the engine.゛

[Problems to be solved by the invention]

However, in the former conventional supercharger,
Since a plurality of turbo superchargers are each installed in series and fixed long distances with bolts, etc., there is a problem that the entire device becomes large and requires time and effort to assemble. In addition, in the latter conventional turbocharger, exhaust gas is supplied to each turbocharger from separate exhaust gas supply ports, so the resistance of the exhaust gas passage is high, making it impossible to actively utilize exhaust pulsation. There was a problem. The present invention was proposed to solve the above-mentioned problems, and includes integrally forming a supercharger housing that accommodates at least two large and small superchargers, and one exhaust gas inlet. The purpose of this invention is to provide a twin-turbo supercharger in which the device is made more compact by having only one compressor in one place, paralleling the compressor in accordance with the size of the turbine, and having a single compressor discharge port. be.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a turbocharger consisting of at least two turbines, one large and one small, driven by engine exhaust gas, and a compressor connected by a rotating shaft corresponding to the size of the turbine. In a twin turbo supercharger equipped with a charger, the two large and small turbo superchargers described above are arranged in parallel, and the turbine and compressor of each supercharger are connected to an integrally formed turbo supercharger. The compressor inlet of the supercharger housing is formed on the suction side of each of the compressors, and the discharge port of one of the compressors is communicated with the discharge port of the other compressor. One exhaust gas inlet formed on the turbine side of the turbocharger housing is formed to communicate with each turbine inlet, and the exhaust gas outlet of each turbine is connected to the turbocharger side. They are configured to be formed in the housing, respectively.

[For production]

Based on the above configuration, exhaust gas from the engine flows into each turbine from the exhaust gas inlet provided at only one location in the supercharger housing, and drives the large and small turbines to rotate. Since the large and small compressors also rotate with the rotation, the air flowing into the compressor is pressurized by the large and small compressors. The outlet from the small compressor communicates with the outlet of the large compressor, and a guide for guiding pressurized air is provided near the outlet of the large compressor, so the air pressurized by the small compressor flows smoothly. It flows to the compressor discharge port side, merges with the air pressurized by the large compressor, and is sent to the engine, where supercharging is performed. τEmbodiments] Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. In FIG. 1, 1 is an engine, 2 is an intake manifold of the engine 1, 3 is an intake passage provided upstream of the engine 1, and 4 is an exhaust passage. Reference numeral 5 denotes an intake passage 9 that communicates between an air flow meter 7 that measures the intake air flow rate from the air cleaner 6 and a first intake port 8a of the twin turbo supercharger 8;
is branched from the intake passage 5 and is connected to the second part of the twin turbo supercharger 8.
The intake passage 9 communicates with the intake port 8b, and the intake passage 9 is provided with a one-way valve 9a. 1G is an exhaust passage communicating with a first outlet 8C through which exhaust gas flows out from the twin-turbo supercharger 8, and 11 is an exhaust passage 10 and a second outlet 8d through which exhaust gas flows out from the twin-turbo supercharger 118. An exhaust gas distribution valve 11a is provided in the exhaust passage that communicates with the exhaust gas distribution valve 11a. The twin turbo supercharging l18 includes a large supercharger 12 consisting of a compressor 12a and a turbine 12b, and a compressor 1.
A small supercharger @13 consisting of a turbine 3a and a turbine 13b is housed in a supercharger housing 14. compressor 1
A discharge port 8e through which the pressurized air pressurized by 3a is discharged.
2 is provided with a guide 8e3 as shown in FIG.
The pressurized air from the compressor 13a is guided by the guide 8e3, pressurized by the compressor 12a, merges with the pressurized air discharged from the discharge port sel, and then flows from the discharge port 8e formed in the supercharger housing 14. Intake passage 3. Throttle body 15. It flows into the engine 1 via the intake manifold 2. On the other hand, the turbine 12b, 1 of the supercharger housing 14
3b side, as shown in FIG. 3, an exhaust gas inlet 8f connected to the exhaust pipe 4 for guiding exhaust gas from the engine 1 is formed, and one side of the exhaust gas from the inlet 8t is to the turbine 13b of the small supercharger 13 via the inlet 8f,
The other one passes through the inlet 8f2 to the turbine 12 of the large supercharger 12.
flows into b. A distribution wall 16 is provided between the inlets 8f- and 8f2 to appropriately distribute the exhaust gas flow l flowing into the turbines 12b and 13b. A bypass valve 17a is provided between the intake passage 3 and the intake passage 9.
A bypass passage 17 is provided. The code 18 is Uniist Game!・Valve 19 is an exhaust gas treatment device. Here, the operation of each of the above control valves will be described. One way valve 9
a is normally closed, and the compressor 1 of the large supercharger 12
When 2a rotates, it operates in the opening direction. In addition, the exhaust gas distribution valve 11a controls the engine rotation speed. It is controlled to open and close depending on the load (or throttle valve opening); it closes when the rotation is low and the load is low, and opens when the rotation is increased and the load is high. On the other hand, the bypass valve 17a is normally closed, but if the throttle is suddenly closed when the supercharger is rotating at high speeds, such as when the throttle is fully open, the compressor will continue to rotate due to inertia, leaving no place for air to escape. To prevent this, the valve is opened to allow air to circulate. Since this embodiment has the above-described configuration, exhaust gas from the engine 1 passes through the exhaust passage 4 from the inlet 8t of the supercharger housing 14 to the inlet 8t2゜8.

[It attempts to flow into the turbine 12b of the large supercharger [112] and the turbine 13b of the small supercharger 1113 through the tray, but when the engine 1 is at low rotation speed and/or under low load, the exhaust gas distribution valve 11a of the exhaust passage 11 is closed. Since it is closed, only the turbine 13b rotates. Due to the rotation of the turbine 13b, the compressor 1
3a rotates, air from the air cleaner 6 flows into the intake passage 5. Compressor 13 via first suction port 8a
The pressurized air that flows into the air outlet 8e2 and is pressurized by the compressor 13a is guided by the guide 8e3 from the outlet 8e2, flows into the intake passage 3 through the outlet 8e1, and then flows into the intake passage 3 through the outlet 8e1. It is sent to engine 1 via intake manifold 2,
Supercharging is performed. Next, when the engine 1 is operated at high speed and/or under high load, the exhaust gas distribution valve 11a opens, so the turbine 121
) rotates. Then, the compressor 12a starts to rotate, so the one-way valve 9a opens, and the compressor 12a,
A large amount of pressurized air pressurized at 13a is sucked into the engine 1. [Effects of the Invention] As described above, the present invention has at least a large number of advantages. Since the two small superchargers are housed in the integrally formed supercharger housing, the twin turbo supercharger itself can be made more compact. Additionally, the turbocharger housing has only one exhaust gas inlet, and a distribution wall is formed at the branch where the exhaust gas flows to each turbine, reducing the passage resistance of the exhaust gas and preventing it from being discharged from the engine. The exhaust gas can be guided straight and can be used as is without attenuating the exhaust pulsation. Furthermore, since the heat dissipation area can be reduced and attenuation of exhaust energy can also be suppressed, it is possible to expect an improvement in the thermal efficiency of each turbine. Furthermore, the pressurized air discharge port of the turbocharger housing is formed at only one location common to each compressor, and the discharge port from the small compressor is communicated with the discharge port of the large compressor, and the discharge port from the small compressor is connected to the discharge port of the large compressor. Since a guide for guiding pressurized air is provided in the compressor, the pressurized air from each compressor can be smoothly merged, and there is no collision loss of pressurized air, so that efficient supercharging can be performed. Therefore, not only can intake air response be improved, but also the drivability of the vehicle when mounted on the vehicle can be improved, and many other excellent effects can be exhibited.

[Brief explanation of the drawing]

The first koji is a system explanatory diagram of a twin-turbo supercharger showing an embodiment of the present invention, FIG. 2 is a schematic diagram of the twin-turbo supercharger seen from the direction of arrow A in FIG. Arrow B in Figure 1
It is a schematic diagram of a twin turbo supercharger seen from the direction. 1...Engine, 2...Intake manifold, 3,5
゜9...Intake passage, 4...Exhaust passage, 8...Twin turbo supercharger, 8a...First intake port, 8b...
2nd inlet, 8C...1st outlet, 8d...2nd outlet, 8e...discharge port, 8f...inlet, 1
0.11...Exhaust passage, 12...Large supercharger, 13.
...Small supercharger, 12a, 13a...Compressor, 12b, 13b...Turbine, 14...Supercharger housing, 16...Distribution wall, 17...Bypass passage. Patent Applicant Fuji Heavy Industries Co., Ltd. Agent Patent Attorney Nobu Kobashi Jundo Patent Attorney Susumu Murai Figure 2 Figure 3

Claims (1)

[Claims] A turbo supercharger comprising at least two large and small turbines driven by engine exhaust gas, and a compressor connected by a rotating shaft corresponding to the size of the turbine. In a twin turbo supercharger, the two large and small turbo superchargers mentioned above are arranged in parallel, and the turbine and compressor of each supercharger are housed inside the integrally formed supercharger housing. a compressor suction port of the supercharger housing is formed on the suction side of each of the compressors, and a discharge port of one of the compressors is formed to communicate with a discharge port of the other compressor; 1 formed on the turbine side of the supercharger housing.
one exhaust gas inlet is formed in communication with each turbine inlet, and the exhaust gas outlet of each of the turbines is formed to communicate with each turbine inlet.
A twin turbo supercharger characterized in that each of the above supercharger housings is formed.