Where is the fuel injector located on the Baojun 730?
1 Answers
This engine adopts multi-point electronic fuel injection, with the fuel injector mounted on the intake manifold. Working principle of fuel injectors: The injector itself is a normally closed valve. When the electromagnetic coil is energized, it generates suction that lifts the needle valve, opening the injection port. Fuel is then sprayed at high speed through the annular gap between the needle valve tip and injection port, forming a fine mist for optimal combustion. Injection methods: There are two types of fuel injection - one sprays fuel into the intake manifold (called intake manifold injection), while the other directly injects fuel into the cylinder (known as direct cylinder injection). Though their structural principles are identical, they operate under different pressures. Intake manifold fuel systems typically maintain 2-8 kg/cm² pressure (1 kg/cm² when engine is off), which serves as a diagnostic parameter for fuel system issues. Direct cylinder injection operates under high pressure, with system pressure ranging from 24-200 kg/cm².