1.5T turbocharged engine runs, and the intake pipe falls off from the front end of the throttle valve, and the engine stops at once. I can't hit it,

Intake pressure sensor: it reflects the change of absolute pressure in intake manifold and provides reference signal for ECU (Engine Electronic Control Unit) to calculate fuel injection duration;

Air flow sensor: measures the amount of air inhaled by the engine and provides it to ECU as a reference signal for fuel injection time;

Throttle position sensor: measures the throttle opening and provides it to ECU as a reference signal for fuel cut-off, air-fuel ratio control and ignition advance angle correction;

Crankshaft angle sensor: detects the rotating speed of crankshaft and engine, and provides it to ECU as reference signal to determine ignition timing and working sequence;

Oxygen sensor: detects the oxygen concentration in the exhaust gas and provides it to ECU as a reference signal to control the air-fuel ratio near the optimal value (theoretical value);

Air temperature sensor: detects the intake air temperature and provides it to ECU as the basis for calculating air density;

Water temperature sensor: detects the temperature of coolant and provides engine temperature information to ECU;

Deflagration sensor: installed on the cylinder block, it detects the deflagration of the engine and provides it to ECU to adjust the ignition advance angle according to the signal.

Guess: the actual intake air after falling off is sucked (scalded) near the engine, and the temperature and pressure are different from those received by ECU, so it cannot be ignited.