You can find and buy High Pressure Fuel Pump / Fuel Injection Pump of high High Pressure Fuel Pump / Fuel Injection Pump – HYUNDAI H Box D (57 . The last carburetor-equipped car came off the assembly line in Since then, fuel injectors have been the primary means of getting gasoline into the engine. For the engine to run smoothly and efficiently it needs to be provided with the right quantity of fuel/air mixture according to its wide range of demands.

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The TCM system is even more simple.

All diesel engines use fuel injection by design. The most common automotive continuous injection system is Fiel K-Jetronicintroduced in Constant-flow injection systems continue to be used at the highest levels of drag racing, where full-throttle, high-RPM performance is key.

Single-point injection was used extensively on American-made passenger cars and light trucks duringand in some European cars in the early and mids. This residual pressure must be relieved, and if it is done so by external knjection, the fuel must be safely contained.

In a continuous injection system, fuel flows at all times from the fuel injectors, but at a variable flow rate. A throttle position sensor TPS provides this information.

The fuel is sprayed with the help of a nozzle that is opened and closed with a needle valve, operated with a solenoid. Many diesel engineshowever, use direct injection in which the diesel is injected directly into the cylinder filled with compressed air. This computer is fed with information from sensors mounted on the engine. Carburetor Gasoline direct injection Common rail. Since the early s, almost all gasoline passenger cars sold in first world markets are equipped with electronic fuel injection EFI.

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In this system, fuel is drawn from the tank by an electric pump. Views Read View source View history. In Rover fitted Lucas electronic fuel injection, which was based on some L-Jetronic patents, to the S-Series d75 as used in the model.

German direct injection petrol engines used injection systems developed by Bosch from their diesel injection systems.

All this happens in a fraction of a second, the control unit responding instantly to changes in accelerator position, temperature and air pressure. Before we look inside the direct injection engine, let’s view a quick second in the life of a standard gasoline engine for a more complete look at the gasoline engine, check out How Car Engines Work. The intake is only slightly wet, and typical fuel pressure runs between injfction.

The fuel meter adjusted the amount of flow according to engine speed and load, lnjection included a fuel reservoir, which was similar to a carburetor’s float chamber.

Direct Injection Basics | HowStuffWorks

This works much like the spray nozzle of a hoseensuring that the fuel comes out as a fine mist. The other popular system is timed injection pulsed injection where the fuel is delivered in bursts to coincide with the induction stroke of the cylinder. Bosch fuel injection systems. For the lay individual, injeciton labyrinth of hoses, wire harnesses, manifolds and tubing beneath a car hood might appear intimidating.

How Direct Injection Engines Work

This is the next step in evolution from multi-point fuel injection, and offers another magnitude of emission control by eliminating the “wet” portion of the induction system along the inlet tract.


This is complex and can be expensive. This system directed the inducted engine air across a “spoon shaped” plunger that moved in proportion to the air volume. Since the fuel passes through the intake runners like a carburetor systemit is called a “wet manifold system”. These examples specifically apply to a modern Fusl gasoline engine. This was a “port” injection where the injectors are located in the intake manifold, very near the intake valve. Finally, the homogeneity of the fuel mixture allows for leaner air—fuel ratios, which together with more precise ignition timing can improve fuel efficiency.

Power to the People”. By virtue of better dispersion and homogeneity of the directly injected fuel, the cylinder and piston are cooled, thereby permitting higher compression ratios and earlier ignition timingwith resultant enhanced power output.

Split-single I2 V2 F2. The duration that the injector is open called the pulse width is proportional to the amount of fuel delivered.

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An electronic system is operated entirely by a microprocessor control unit. While a simple carburetor system is cheaper to manufacture than a fuel injection system, the more complex carburetor systems installed on many engines in the s were much more costly than the earlier simple carburetors.

Please help improve this article by adding citations to reliable sources. Journal of the American Medical Association.