1.1 Continuous Injection System (CIS)
CIS is a completely mechanical fuel injection system, in which the amount of fuel metered to the engine is controlled mechanically by the air flow sensor and fuel pressure.
The main components of the system are the air flow sensor, the fuel distributor, and the fuel injectors. The air flow sensor is moved by the flow of intake air, in effect measuring the volume of air entering the engine. Based directly on the movement of the air flow sensor, the fuel distributor meters a proportional amount of fuel to the fuel injectors. All fuel metering is done by the fuel distributor. The fuel injectors are actually precise nozzles through which fuel flows continuously while the engine is running. They have no fuel metering function.
Several auxiliary components are used to further adapt the fuel mixture to various operating conditions by making changes in fuel pressure. For more detailed information on CIS and its function, see 5. Continuous Injection System (CIS).
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