Structure and system for natural gas engine to control exhaust gas turbocharger

Abstract

The utility model discloses a structure and a system for a natural gas engine to control an exhaust gas turbocharger, which comprise an air pressure regulator body and are characterized by further comprising an air inlet joint, and the air inlet joint is communicated with one side of the air pressure regulator body; the air outlet connector is communicated with the other side of the air pressure regulator body; the top of the adjusting cover is fixedly connected with the bottom of the air pressure regulator body through a bolt; the fixing support is arranged between the opposite sides of the adjusting cover and the air pressure regulator body. According to the air taking scheme of the air pressure regulator, an external stable air source is adopted for taking air, the air source is clean and free of condensate water, and the air storage tank of the whole vehicle is provided with a drying agent and a filter; stable air source pressure is provided for a turbine bypass valve actuator, pumping loss caused by unsmooth air inlet of an engine is reduced, and therefore the engine achieves the optimal performance.

Description

Technical Field

[0001] The utility model belongs to the technical field of natural gas engines, and in particular relates to a structure of an exhaust gas turbocharger for controlling a natural gas engine. Background Art

[0002] Domestic natural gas engine exhaust systems all use exhaust gas turbochargers. This turbocharger has a bypass valve inside to control the turbocharger speed, thereby achieving the purpose of controlling the pressure after supercharging and meeting the optimal engine intake pressure requirements. The bypass valve is controlled by a dedicated valve, which needs to be driven by external air pressure.

[0003] The existing technology is to drive the engine by taking air from the rear of the intercooler. The disadvantage of this technology is that the air pressure is unstable when taking air from the rear of the intercooler, and it will cause poor air intake and pumping loss, which will result in the engine being unable to achieve optimal performance under certain operating conditions. Utility Model Content

[0004] The utility model provides a structure for controlling an exhaust gas turbocharger of a natural gas engine, so as to solve the problems existing in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is: a structure for controlling exhaust gas turbocharger of natural gas engine, including air pressure regulator body,

[0006] An air inlet connector, the air inlet connector being connected to one side of the air pressure regulator body;

[0007] An air outlet connector, the air outlet connector being connected to the other side of the air pressure regulator body;

[0008] An adjusting cover, the top of which is fixedly connected to the bottom of the air pressure regulator body by bolts;

[0009] The fixing bracket is arranged between the regulating cover and a side opposite to the air pressure regulator body.

[0010] A system for controlling an exhaust gas turbocharger of a natural gas engine includes an air storage tank, the output end of the air storage tank being connected to the air inlet of an air pressure regulator via a first air pipe, the air outlet of the air pressure regulator being connected to an exhaust gas bypass control valve via a second air pipe, one end of the exhaust gas bypass control valve being provided with a turbine bypass valve actuator, the other end of the turbine bypass valve actuator being provided with a supercharger, and the other end of the exhaust gas bypass control valve being connected to the exhaust gas turbocharger via a third air pipe.

[0011] The beneficial effects of adopting the above technical solution are:

[0012] 1. The utility model adopts an air pressure regulator to take air from an external stable air source. The air source is clean and free of condensed water. The vehicle air tank is equipped with a desiccant and a filter. It provides a stable air source pressure for the turbine bypass valve actuator and reduces the pumping loss caused by poor engine air intake, thereby achieving optimal engine performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the air pressure regulator of the utility model;

[0014] Figure 2 This is the system flow diagram of the utility model;

[0015] in:

[0016] 1. Air pressure regulator body; 2. Air inlet connector; 3. Air outlet connector; 4. Adjustment cover; 5. Fixing bracket; 6. Air tank; 7. Air pressure regulator; 8. Waste gas bypass control valve; 9. Turbine bypass valve actuator; 10. Supercharger; 11. Waste gas turbocharger. DETAILED DESCRIPTION

[0017] The following is a further detailed description of the specific implementation methods of the present invention by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and to facilitate its implementation.

[0018] Example 1:

[0019] like Figure 1 As shown, the utility model is a structure for controlling an exhaust gas turbocharger for a natural gas engine, comprising an air pressure regulator body 1, an air inlet connector 2, the air inlet connector 2 being connected to one side of the air pressure regulator body 1; an air outlet connector 3, the air outlet connector 3 being connected to the other side of the air pressure regulator body 1; an adjusting cover 4, the top of the adjusting cover 4 being fixedly connected to the bottom of the air pressure regulator body 1 by bolts; and a fixing bracket 5, the fixing bracket 5 being arranged between the adjusting cover 4 and the opposite side of the air pressure regulator body 1.

[0020] The bolts on the adjusting cover 4 are locked and glued to prevent the adjusting cover from rotating. If the pressure needs to be adjusted, the screws on the adjusting cover need to be loosened, the adjusting cover needs to be lifted and rotated in the direction indicated by the arrow on the adjusting cover, and then the adjusting cover needs to be pressed down and the screws need to be tightened to ensure stable pressure.

[0021] Example 2:

[0022] like Figure 2As shown, the present invention is a system for controlling an exhaust gas turbocharger of a natural gas engine, comprising an air storage tank 6, the output end of the air storage tank 6 being connected to the air inlet of an air pressure regulator 7 via a first air pipe, the air outlet of the air pressure regulator 7 being connected to an exhaust gas bypass control valve 8 via a second air pipe, one end of the exhaust gas bypass control valve 8 being provided with a turbine bypass valve actuator 9, the other end of the turbine bypass valve actuator 9 being provided with a supercharger 10, and the other end of the exhaust gas bypass control valve 8 being connected to an exhaust gas turbocharger 11 via a third air pipe;

[0023] The air pressure regulator 7 takes air from the air storage tank 6 and provides stable air pressure to the waste gas bypass control valve 8 through the first air pipe and the second air pipe;

[0024] The wastegate control valve 8 controls the turbine bypass valve actuator 9, thereby controlling the pressure after the turbocharger 10 boosts. The turbine bypass valve actuator 9 responds to a PWM control signal from the engine control unit (ECU) to control the valve core to a certain opening, thereby controlling the pressure at the ACT terminal (the mechanical actuator connected to the exhaust turbocharger bypass valve) to a certain value. (The ECU calculates the target value for the ACT terminal pressure control based on the engine operating conditions and monitors the reading of the ACT terminal pressure sensor to achieve closed-loop control.) At this pressure, the turbine bypass valve actuator 9 pushes the bypass valve to a certain opening, thereby controlling the engine boost pressure. When the wastegate control valve 8 releases pressure, the exhaust gas returns through the air pipe to the exhaust turbocharger 11 (compressor).

[0025] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above-mentioned concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A structure for controlling an exhaust gas turbocharger for a natural gas engine, comprising an air pressure regulator body (1), characterized in that: Also includes An air inlet connector (2), the air inlet connector (2) being connected to one side of the air pressure regulator body (1); An air outlet connector (3), the air outlet connector (3) being connected to the other side of the air pressure regulator body (1); An adjusting cover (4), the top of the adjusting cover (4) being fixedly connected to the bottom of the air pressure regulator body (1) via bolts; A fixing bracket (5) is provided between the regulating cover (4) and a side opposite to the air pressure regulator body (1).

2. A system for controlling an exhaust gas turbocharger of a natural gas engine, characterized by: The invention comprises an air storage tank (6), wherein the output end of the air storage tank (6) is connected to the air inlet of an air pressure regulator (7) through a first air pipe, the air outlet of the air pressure regulator (7) is connected to an exhaust gas bypass control valve (8) through a second air pipe, one end of the exhaust gas bypass control valve (8) is provided with a turbine bypass valve actuator (9), the other end of the turbine bypass valve actuator (9) is provided with a supercharger (10), and the other end of the exhaust gas bypass control valve (8) is connected to an exhaust gas turbocharger (11) through a third air pipe.

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