CN211448826U

CN211448826U - Exhaust gas turbocharger bypass valve control device

Info

Publication number: CN211448826U
Application number: CN201922470638.2U
Authority: CN
Inventors: 卢永信; 郭焱; 池晓谷; 郑智展
Original assignee: Sinotruk Jinan Power Co Ltd
Current assignee: China National Heavy Duty Truck Group Hangzhou Engine Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-09-08
Anticipated expiration: 2029-12-31

Abstract

In order to solve the problem of booster bypass valve aperture control, the utility model provides an exhaust-gas turbine booster bypass valve controlling means mainly includes exhaust-gas turbine booster and connects in the aperture controlling means of booster bypass valve, its characterized in that, aperture controlling means mainly includes: the two ends of the pressure control valve are respectively connected with the high-pressure air source and the supercharger bypass valve, the pressure control valve is connected with the high-pressure air source through an air taking pipe of the pressure control valve, and the pressure control valve is connected with the supercharger bypass valve through an air outlet pipe of the pressure control valve; and the ECU is connected with the engine through an engine wiring harness, and the ECU is connected with the pressure control valve through a pressure control valve wiring harness for controlling the pressure control valve.

Description

Exhaust gas turbocharger bypass valve control device

Technical Field

The utility model relates to the technical field of engines, in particular to exhaust-gas turbocharger bypass valve controlling means.

Background

In order to increase the power per liter of the engine and reduce the fuel consumption rate of the engine, an exhaust gas turbocharger is widely used. The exhaust gas turbocharger fully utilizes the energy of exhaust gas to drive the pressure end of the supercharger to compress fresh air and then the fresh air enters the interior of the engine to participate in combustion. In order to take care of the running conditions of the engine under different rotating speeds and loads, the exhaust gas needs to be bypassed when the energy of the exhaust gas is excessively utilized, so that the supercharger is ensured to run in a high-efficiency area without excessive energy. The common air relief valve supercharger is opened completely only when the pressure at the end of the air compressor reaches a set value, and the bypass valve is closed completely when the pressure at the end of the air compressor is lower than the set value. The bypass valve opening and closing is completely uncontrolled by the ECU and is a purely mechanical switch setting. Although the variable-area exhaust gas turbocharger can regulate the energy utilization of the turbine end in the whole process, it is expensive. The supercharger in which the bypass valve is controlled by the motor may be connected to the opening degree of the bypass valve according to the command of the ECU, but the motor is expensive and needs to be far from the heat source, which causes many difficulties in the layout of the engine.

Disclosure of Invention

In order to solve the problem, the utility model provides an exhaust-gas turbocharger bypass valve controlling means, the technical scheme of adoption as follows:

an exhaust gas turbocharger bypass valve control device mainly comprising an exhaust gas turbocharger and an opening degree control device connected to a supercharger bypass valve, characterized in that the opening degree control device mainly comprises:

the two ends of the pressure control valve are respectively connected with the high-pressure air source and the supercharger bypass valve, the pressure control valve is connected with the high-pressure air source through an air taking pipe of the pressure control valve, and the pressure control valve is connected with the supercharger bypass valve through an air outlet pipe of the pressure control valve;

and the ECU is connected with the engine through an engine wiring harness, and the ECU is connected with the pressure control valve through a pressure control valve wiring harness for controlling the pressure control valve.

Preferably, the high-pressure gas source is gas in an intake pipe of the intercooled engine.

Preferably, the control valve takes the gas pressure in the gas pipe to be greater than the atmospheric pressure.

The beneficial effects of the utility model reside in that: the original configuration on the engine is utilized, low-cost pressure control and pipelines thereof are added, and the bypass flow of the exhaust gas turbocharger bypass is smoothly controlled, so that the aims of controlling the resistance of the turbocharger at the pressure end and the working energy of the pressure end are fulfilled, the aim of adjusting the running efficiency of the engine is fulfilled, and the advantages of reducing oil consumption, reducing emission, prolonging the service life of the engine and the like are facilitated.

Drawings

FIG. 1 is a schematic view of the structure of the present invention

The system comprises an engine 1, an intercooler 2, an engine air inlet pipe 3, an engine exhaust manifold 4, a turbine 5, a supercharger bypass valve 501, a bypass valve pipeline 502, a pressure control valve 6, a pressure control valve air intake pipe 601, a pressure control valve air outlet pipe 602, an ECU7, an engine wiring harness 8, a pressure control valve wiring harness 801 and a compressor 9.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

As shown in fig. 1, the exhaust gas turbocharger bypass valve control device is composed of a turbine 5 and a compressor 9, an intercooler 2 is connected between the compressor 9 and an engine intake pipe 3, the exhaust gas turbocharger is installed behind an engine exhaust manifold 4, the engine exhaust manifold 4 is connected with the turbine 5, a bypass control valve 501 and a bypass valve pipeline 502 are arranged at the exhaust end of the exhaust gas turbocharger, the supercharger bypass valve 501 is connected with the air outlet end of a pressure control valve 6 through a pressure control valve air outlet pipe 602, the air inlet end of the pressure control valve 6 is connected with the engine intake pipe 3 through a pressure control valve air outlet pipe 601, an engine harness 8 is connected between an ECU7 and the engine 1 and used for reading the operation conditions (such as ambient temperature, ambient pressure, after-intercooler pressure, temperature, engine speed, engine torque, engine temperature, engine fuel injection amount, etc.), the ECU7 is connected to the pressure control valve 6 via a pressure control valve harness 801 for controlling the pressure of the pressure control valve outlet 602.

The ECU7 calculates the required opening of the supercharger bypass valve 501 by reading the operating condition of the engine, when the supercharger bypass valve 501 needs to be opened to a certain degree, the ECU7 issues a data command to the control valve 6, so that the pressure control valve 6 adjusts the gas pressure in the pressure control valve gas outlet pipe 602 to drive the supercharger bypass valve to be opened to the required degree, and at the moment, part of the waste gas directly enters the supercharger rear-end pipeline through the bypass valve channel 502; when the supercharger bypass valve 501 needs to be completely closed, the ECU issues a data command to the pressure control valve 6, at this time, the pressure control valve 6 adjusts the gas pressure in the pressure control valve gas outlet pipe 602 to be close to the atmospheric pressure, and the supercharger bypass valve 501 is completely closed by the supercharger bypass valve 501 returning mechanism.

On the basis of the original engine, the bypass flow of the exhaust gas turbocharger bypass is smoothly controlled by increasing pressure control and a pipeline thereof, so that the aims of controlling the resistance of the turbocharger and the working energy of the pressure end and adjusting the running efficiency of the engine are fulfilled, and the engine control system is simple in structure and convenient to modify.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements can be made, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. An exhaust gas turbocharger bypass valve control device mainly comprising an exhaust gas turbocharger and an opening degree control device connected to a supercharger bypass valve, characterized in that the opening degree control device mainly comprises:

2. The exhaust gas turbocharger bypass valve control apparatus according to claim 1, wherein the high pressure gas source is intercooled engine intake pipe gas.

3. The exhaust-gas turbocharger bypass valve control apparatus according to claim 1 or 2, characterized in that the control valve takes in-pipe gas pressure that is greater than atmospheric pressure.