EFI Auto Vehicle Electrician course in Rawalpindi Shamsabad Murree road Punjab 03115193625 EFI Auto Vehicle Electrician course in Rawalpindi Shamsabad Murree road Punjab 03354176949 International college of Technical education Offers EFI Auto Vehicle course admission open for admission and information call 03115193625, 03354176949 for more visit our website www.icollegete.com, www.courses.com.pk. Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector. This article focuses on fuel injection in reciprocating piston and rotary piston engines.
The term "fuel injection" is vague and comprises various distinct systems with fundamentally different functional principles. Typically, the only thing in common all fuel injection systems have is the lack of carburetion. There are two main functional principles of mixture formation systems for internal combustion engines: internal mixture formation, and external mixture formation. A fuel injection system that uses external mixture formation is called a manifold injection system; there exist two types of manifold injection systems: multi-point injection (port injection), and single-point injection (throttle-body injection). Internal mixture formation systems can be separated into direct and indirect injection systems. There exist several different varieties of both direct and indirect injection systems; the most common internal mixture formation fuel injection system is the common-rail injection system, a direct injection system. The term electronic fuel injection refers to any fuel injection system having an engine control unit. All fuel injection systems comprise three basic components: they have at least one fuel injector (sometimes called an injection valve), a device that creates sufficient injection pressure, and a device that meters the correct amount of fuel. These three basic components can either be separate devices (fuel injector(s), fuel distributor, fuel pump), partially combined devices (injection valve and an injection pump), or completely combined devices (unit injector). Early mechanical injection systems (except air-blast injection) typically used injection valves (with needle nozzles) in combination with a single (or more than one) relatively sophisticated helix-controlled injection pump(s) that both metered the fuel, and created the injection pressure. They were well-suited for intermittently injecting multi-point injection systems as well as all sorts of conventional direct injection systems, and chamber-injected systems. Advancements in the field of microelectronics allowed injection system manufacturers to significantly improve the accuracy of the fuel metering device. In modern engines, the fuel metering and injection valve actuation is usually done by the engine control unit. Therefore, the fuel injection pump does not have to meter the fuel or actuate the injection valves; it only needs to provide injection pressure. These modern systems are used in multi-point-injected engines, and common-rail-injected engines. Unit injection systems have made it into series production in the past, but proved to be inferior to common-rail injection.
EFI Auto Vehicle Electrician course in Rawalpindi Shamsabad Murree road Punjab admission open for admission and information call 03115193625 for more visit our website www.icollegete3.com, www.courses.com.pk.