Which component plays a decisive role in fuel injection quantity?

[StManuel]

The sensor that plays a decisive role in fuel injection quantity is the throttle position sensor. Introduction to fuel injectors: A fuel injector is a high-precision device with stringent manufacturing requirements, featuring a wide dynamic flow range, strong resistance to clogging and contamination, and excellent atomization performance. The fuel injector receives injection pulse signals from the ECU, enabling precise control of fuel injection quantity. Functions of fuel injectors: Fuel injectors can increase fuel pressure to between 10MPa and 20MPa, control injection timing to start and stop fuel injection as scheduled, and regulate injection quantity based on the diesel engine's operating conditions to adjust engine speed and power output.

[SanSavannah]

While researching car engines recently, I discovered that the component that plays a decisive role in fuel injection quantity is the Engine Control Unit, commonly known as the ECU. It functions like a brain, collecting information from sensors such as the air flow sensor, oxygen sensor, and coolant temperature sensor, and calculates in real-time how much fuel to inject to maintain the optimal air-fuel ratio. This directly impacts fuel efficiency and power output. If a sensor malfunctions, incorrect calculations by the ECU can lead to excessive or insufficient fuel injection, causing issues like high fuel consumption and excessive emissions. During routine maintenance, remember to regularly check if the sensor connections are secure to avoid triggering fault codes that could affect the driving experience.

[LaHenry]

After driving for over a decade, I've concluded one thing: precise fuel injection control entirely depends on the engine control unit. Once when my car's fuel consumption suddenly skyrocketed, the mechanic diagnosed a faulty oxygen sensor causing the ECU to miscalculate and increase fuel injection. This smart device dynamically adjusts injection timing and quantity based on sensor data from various engine components to ensure complete combustion. Keeping sensors clean and wiring unobstructed is crucial—regular maintenance prevents fuel injection issues, saving both money and headaches.

[LauraLynn]

During my car repair process, the fuel injection quantity is most commonly determined by the engine control unit. It receives sensor signals such as intake pressure and crankshaft position to precisely control the injector opening duration. ECU malfunction can cause inaccurate fuel injection, leading to engine shaking or emission issues. It's essential to check sensors like the mass airflow sensor for blockages or aging, as precise fuel injection is crucial for ensuring smooth vehicle operation.