A turbocharger and its wastegate valve pneumatic actuator
A technology of pneumatic actuators and wastegate valves, which is applied in the direction of machines/engines, combustion engines, engine components, etc., can solve problems such as unstable working air pressure, enlarged associated gaps, mutual wear of parts, etc., and achieve vibration suppression and related problems. Effects of metal knocking noise, suppression of resonance phenomenon, and stable control
Active Publication Date: 2022-04-26
SAIC MOTOR
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Problems solved by technology
With people's pursuit of high power and low emission of supercharged engines, the working range of turbochargers has reached higher and higher compressor compression ratios. At the same time, the accompanying noise of turbochargers has become more and more affected Pay attention, especially in some transitional conditions, the working air pressure related to the wastegate valve actuator is unstable, and the phenomenon of push rod vibration is prominent, resulting in damage between the push rod and the rocker arm and between the wastegate valve and the valve seat. Metal collision and knocking noises occur at many connection parts, the parts wear each other seriously, the connection gap becomes larger, and even the connection loosens
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[0033] For ease of understanding, the present invention will be further described below in conjunction with the accompanying drawings.
[0034] see Figure 1 ~ Figure 4 , figure 1 It is a three-dimensional schematic diagram of a turbocharger provided by an embodiment of the present invention, figure 2 yes figure 1 Schematic diagram of the wastegate pneumatic actuator for the turbocharger shown, image 3 yes figure 2 Cutaway view of actuator 1 in, Figure 4 yes image 3 A-A sectional view in .
[0035] The turbocharger provided by the embodiment of the present invention includes a turbine 4, a solenoid valve 5, a compressor 6, and a pneumatic actuator of a wastegate valve. The wastegate valve pneumatic actuator includes a rocker arm 3 fixedly connected to the wastegate valve 8 , a push rod 2 hinged to the rocker arm 3 , and an actuator 1 for driving the push rod 2 . The solenoid valve 5 is a three-way valve, and its three interfaces are respectively connected to the p...
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The invention provides a turbocharger and a wastegate valve pneumatic actuator thereof. The wastegate pneumatic actuator includes a rocker arm, a push rod and an actuator (1), and the housing of the actuator is composed of a diaphragm ( 12) It is divided into an air pressure chamber and a spring chamber. A partition (13) with a nozzle (131) in the middle is arranged in the air pressure chamber. In the middle of the bottom, a labyrinth-type voltage stabilizing unit is arranged between the bottom of the shell and the partition, and the stabilizing unit includes a cylinder (15) and a cylinder (16) that are arranged on the bottom of the shell and are coaxial with the air inlet. The number of ribs is odd, the ribs are located in the cylinder and lower than the cylinder, and the end of the cylinder away from the bottom of the shell is sealed by a cover plate (14), and a plurality of air holes are provided on the cover plate and the cylinder. The wastegate valve pneumatic actuator provided by the invention can realize stable control, effectively suppress the vibration of the push rod and related metal knocking noise, and help to improve the working reliability of the turbocharger and the ride comfort.
Description
technical field [0001] The invention relates to the technical field of turbochargers, in particular to a turbocharger and a waste gas bypass valve pneumatic actuator thereof. Background technique [0002] In order to meet the power demand of a supercharged engine, it is generally necessary to control the air flow (pressure) entering the cylinder. This is mainly achieved by controlling the opening of the wastegate valve of the turbocharger, that is, the engine control unit (ECU) issues instructions, which are executed by mechanism to complete the specified switching action of the wastegate valve. With people's pursuit of high power and low emission of supercharged engines, the operating range of turbochargers has reached higher and higher compressor compression ratios. At the same time, the accompanying noise of turbochargers has become more and more affected Pay attention, especially in some transitional conditions, the working air pressure related to the wastegate valve ac...
Claims
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IPC IPC(8): F02B37/18F01D17/26
CPCF02B37/186F01D17/26Y02T10/12
Inventor 陈如彬谢正海王康
Owner SAIC MOTOR