Direct Injection


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Direct Injection

 

a method of supplying fuel to the combustion chamber of an internal-combustion engine with internal mixing; the fuel is atomized as it enters the chamber at high speed. Direct injection is achieved by means of manifold fuel feed equipment operating at a maximum injection pressure of up to 100 meganewtons per sq m (MN/m2; 1 MN/m2 = 10 kilograms-force per sq cm) or by a pump-and-injector unit at a pressure of up to 200 MN/m2. Direct injection is used in diesel engines and in certain types of engines with spark ignition.

References in periodicals archive ?
In contrast, motor function improved 28 to 35 days posttransplantation in the BMSC/ direct injection group.
(CDP) develops a patent pending system of fuel injection for Direct Injection (DI) applications.
The instrument features an injection volume range of 1 [micro]L to 5 mL using a minimal dead volume direct injection design.
This direct injection 3,498 cc power plant is 30 per cent more economical than before, yet with 306 hp at 6,500 rpm and 370 Nm of torque at 3,500 - 5,250 rpm it also delivers sharper performance, accelerating the two-seater to 62 mph in 5.9 seconds and onto a 155 mph electronically limited top speed.
The Units are available in either direct injection or closed circuit configurations for controlled cooling.
The Micra's engine is a direct injection unit with a supercharger, and uses the Miller cycle and direct petrol injection to raise the engine's compression ratio for greater combustion efficiency and the supercharger for instant throttle response and added power.
While similar in theory to "direct-injection" systems, which also inject fuel directly into cylinders, such direct injection systems are difficult to use on small-displacement engines because they require a high-pressure pump that complicates system design, making component layout less cost-efficient.
AT one time, direct injection petrol engines were almost as economical as diesels.
Continental, one of the world's largest automotive suppliers, developed such an innovative technology and is the first to mass-produce the gasoline Piezo direct injection system.
The Pinin five-door gets a 2.0-litre direct injection petrol engine instead of the three-door model's 1.8, and this is enough to make it faster than most.
EcoBoost isn't entirely new technology, at least not to Europeans, who are already familiar with the concept of direct injection (DI).

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