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Before the invention of precombustion chamber injection, air-blast injection was the only way a properly working internal air fuel mixture system could be built, required for a Diesel engine. During the 1920s, [2] air-blast injection was rendered obsolete by superior injection system designs that allowed much smaller but more powerful engines ...
Air injection is now used to support the catalytic converter's oxidation reaction, and to reduce emissions when an engine is started from cold. After a cold start, an engine needs an air-fuel mixture richer than what it needs at operating temperature , and the catalytic converter does not function efficiently until it has reached its own ...
Air injection can also be achieved by taking advantage of the negative pressure pulses in the exhaust system at engine idle. A sensitive reed valve assembly called the aspirator valve is placed in the air injection pumping, which draws its air directly from the clean side of the air filter. During engine idle, brief but periodic negative ...
The first four-stroke direct-injection petrol engine for a passenger car was released the following year, in the Mercedes-Benz 300SL sports car. [41] However the engine suffered lubrication problems due to petrol diluting the engine oil, [ 42 ] [ 43 ] and subsequent Mercedes-Benz engines switched to a manifold injection design.
The fuel pump is mounted above the cylinder head and driven by the camshaft, [21] the air-blast pump is cast onto the cylinder and driven via a lever by two connecting rods from the engine's piston rod. [26] Like all air-blast injected diesel engines, the Motor 250/400 has a compressed gas bottle for the injection air. It is made of welded ...
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WASHINGTON (Reuters) -China-based DJI and Autel Robotics could be banned from selling new drones in the United States market under an annual military bill set to be voted on later this week by the ...