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The goal of EGR is thus to reduce NO x production by reducing the combustion temperatures. In modern diesel engines, the EGR gas is usually cooled with a heat exchanger to allow the introduction of a greater mass of recirculated gas. However, uncooled EGR designs do exist; these are often referred to as hot-gas recirculation (HGR).
[77] [full citation needed] In turbocharged engines, EGR needs a controlled pressure differential across the exhaust manifold and intake manifold, which can be met by such engineering as use of a variable geometry turbocharger, [citation needed] which has inlet guide vanes on the turbine to build exhaust backpressure in the exhaust manifold ...
This causes excessive buildup in the cooler matrix, and when the engine warms up these solid chunks of buildup can detach from the EGR cooler and get sucked into the plastic intake tube, melting holes in the intake tube, causing a massive boost leak and in very rare cases an engine fire. BMW has issued a recall to over 1.6 million vehicles in ...
The BMW N57 is a family of aluminium, turbocharged straight-6 common rail diesel engines. The engines utilize variable geometry turbochargers and Bosch piezo-electric injectors. [ 1 ] The engine jointly replaced the M57 straight-6 and M67 V8 engines.
The BMW N73 is a naturally aspirated V12 petrol engine which replaced the BMW M73 and was produced from 2003–2016. It was used in the BMW 7 Series (E65) and Rolls-Royce Phantom VII. The N73 was the world's first production V12 engine to use gasoline direct injection. [1]
Seven News (stylised 7NEWS) is the television news service of the Seven Network and, as of 2021, the highest-rating in Australia. [1]National bulletins are presented from Seven's high definition studios in South Eveleigh, Sydney, while its flagship 6 pm statewide bulletins are produced in studios based in Sydney, Melbourne, Brisbane, Adelaide, and Perth.
Reporting outdoors, news anchor Kyle Clark and weather meteorologist Kathy Sabine at 9news Denver got into a heated exchange that was, to say the least, some of the most awkward TV in recent memory.
KGO-TV (channel 7) is a television station licensed to San Francisco, California, United States, serving the San Francisco Bay Area.It has been owned and operated by the ABC television network through its ABC Owned Television Stations division since the station's inception.