How to Deal with the Missing Control Signal of Injector in China Jie Jun in 2009?

In 2009, there was no control signal for the injector in Jie Jun, China, so it was necessary to measure whether the injector was positively charged. Because the computer controls the negative line of the injector. If the fuel injector has positive electricity, there is no negative signal. There is high voltage at present, and the computer needs to be repaired.

Classification of electronically controlled fuel injection systems

According to the test method of intake air flow, it can be divided into three types: quality control type, speed-density type and throttle speed type. According to the different air flow meters used, mass flow types can be divided into three types: hot wire type, plate type and Carmen vortex type.

According to the injection position of the injector, it can be divided into two types: in-cylinder direct injection and port injection. Intake injection type is divided into single-point injection and multi-point injection according to the installation position of injector.

Multi-point injection system means that a central injection device is installed at the intake valve of each cylinder, and the injection is controlled by ECU. Its fuel distribution uniformity is good, but the control system is complex and the cost is high. Mainly used for mid-to high-end cars.

Single-point injection system means that a central injection device is installed above the throttle valve, from 1 to 2 injectors for centralized injection. The sequential injection mode is adopted. Simple structure, few faults and convenient maintenance and adjustment. Widely used in ordinary cars and trucks.