In a pressure carburetor, where is the fuel discharged?

In a pressure carburetor, fuel is discharged downstream of the throttle valve. This design allows for better atomization and mixing of fuel with air, which is crucial for efficient combustion in the engine. When fuel is discharged after the throttle valve, it ensures that the flow of fuel can be controlled effectively in relation to the airflow entering the engine.

By positioning the discharge point downstream, pressures and flows can be optimized as the throttle is opened or closed. This configuration minimizes the risk of fuel pooling and ensures that the engine receives an adequate and consistent mixture of air and fuel across various operating conditions. It also supports better performance at different throttle settings, enhancing overall engine response and efficiency.

The other options would not provide the efficient fuel-air mixture needed for optimal engine operation. Discharging fuel before or at the throttle valve could disrupt the airflow characteristics and lead to poor atomization, resulting in incomplete combustion.