MASS FLOW THROTTLE FOR LARGE ENGINES ON NATURAL GAS Russian patent published in 2022 - IPC F02D9/10 F02D19/02 F02D41/00 F02M21/02 

FIELD: engines.

SUBSTANCE: invention can be used in internal combustion engines. The throttle for an internal combustion engine with spark ignition provides control of the mass flow rate of the supplied gas flow for the engine based on the engine control signal constituting the instantaneous required mass flow rate for the supplied gas flow. The supplied gas is air or gaseous fuel, or a combination of fuel and air. The throttle comprises a single unit assembly with an inlet (390) for the supplied flow, an outlet (170), and two pressure takeoff holes (230), (240), and a continuous flow channel between the inlet (390) and the outlet (170). The throttle has a throttle valve (210) located movably in the flow channel. A high-speed rotary actuator is provided, installed on the single unit assembly. The rotary actuator has a rotating drive shaft (710) connected integrally with the throttle valve (210). The rotary actuator actuates the drive shaft (710), controls the position of the throttle valve (210), and adjusts the size of the effective area of the flow opening of the throttle. A control circuit is provided, connected by a printed circuit board. The control circuit comprises a microcontroller, pressure sensors, and a thermistor. The first pressure takeoff hole (230) is open for communication with the continuous flow channel at a point upstream from the throttle valve (210). The second pressure takeoff hole (240) is open for communication with the flow channel at a point downstream from the throttle valve (210). The first pressure sensor is coupled with the first pressure takeoff hole (230). The second pressure sensor is coupled with the second pressure takeoff hole (240). The third pressure sensor detects the difference in pressure between two locations in the flow channel. The thermistor determines the temperature of the gaseous flow in the flow channel. The microcontroller receives an engine control signal constituting the instantaneous required mass flow rate for the supplied gas flow. The microcontroller controls the operation of the rotary actuator. The microcontroller is programmed to coordinate the operation of the throttle. The microcontroller modifies the actuation of the rotary actuator to reduce the mass flow rate of the supplied gas flow corresponding to the instantaneous required mass flow rate for the supplied gas flow. Disclosed is a tool for controlling the supplied flow for an internal combustion engine with spark ignition.

EFFECT: increase in the accuracy of mass flow control despite pressure fluctuations occurring during operation in the non-throttled flow.

11 cl, 14 dwg