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Diesel exhaust fluid (DEF; also known as AUS 32 and sometimes marketed as AdBlue [3]) is a liquid used to reduce the amount of air pollution created by a diesel engine. Specifically, DEF is an aqueous urea solution made with 32.5% urea and 67.5% deionized water .
Swirl flap principle in a four-valve engine. A swirl flap is a small butterfly valve fitted to four-stroke internal combustion engines with at least two intake valves.It is installed inside or just before one of a cylinder's two intake ports, allowing to throttle its intake port's air flow, causing a swirl in the other intake port not fitted with a swirl flap.
Typical airflow in a four-stroke engine: In stroke #1, the pistons suck in (aspirate) air to the combustion chamber through the opened inlet valve.. A naturally aspirated engine, also known as a normally aspirated engine, and abbreviated to N/A or NA, is an internal combustion engine in which air intake depends solely on atmospheric pressure and does not have forced induction through a ...
This is a pipe running from the crankcase (or the valve cover on an overhead valve engine) down to a downwards-facing open end located in the vehicle's slipstream. When the vehicle is moving, airflow across the open end of the tube creates suction (a "draught" or draft) that pulls gases out of the crankcase.
Holes on the edges of the plate fit over these bolts and the cover is fastened down with nuts or dogs. Vapor accidents can occur when pressure builds up in the tank below and the Butterworth cover is carelessly removed. [5] Butterworth hatches have been responsible for a number of marine losses. [6]
The most common soot-control device is a diesel particulate filter (DPF) installed downstream of the engine in the exhaust system. This captures soot but causes a reduction in fuel efficiency due to the back pressure created. Diesel particulate filters come with their own set of very specific operational and maintenance requirements. Firstly ...
Cam-in-block 2 (B-Series) or 4 (ISB, QSB) valves/cylinder: Compression ratio: 17.2:1, 17.3:1, 17.5:1, 19:1: Combustion; Turbocharger: Holset Engineering (variable) Fuel system: Common rail high pressure direct injection, symmetrical combustion chamber with 7-hole injectors: Management: Bosch mechanical with electronic advance: Fuel type: Diesel ...
Pressure-fed rocket cycle. Propellant tanks are pressurized to directly supply fuel and oxidizer to the engine, eliminating the need for turbopumps. The pressure-fed engine is a class of rocket engine designs. A separate gas supply, usually helium, pressurizes the propellant tanks to force fuel and oxidizer to the combustion chamber. To ...