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Front-mounted air-to-air intercooler Top-mounted air-to-liquid intercooler (the silver cuboid-shaped part) on a BMW S55 turbocharged engine. An intercooler is a heat exchanger used to cool a gas after compression. [1] Often found in turbocharged engines, intercoolers are also used in air compressors, air conditioners, refrigeration and gas ...
Some engines have an oil cooler, a separate small radiator to cool the engine oil. Cars with an automatic transmission often have extra connections to the radiator, allowing the transmission fluid to transfer its heat to the coolant in the radiator. These may be either oil-air radiators, as for a smaller version of the main radiator.
Oil cooling is the use of engine oil as a coolant, typically to remove surplus heat from an internal combustion engine. The hot engine transfers heat to the oil which then usually passes through a heat-exchanger, typically a type of radiator known as an oil cooler. The cooled oil flows back into the hot object to cool it continuously.
The major changes are new headlights, engine, design, and the interior as well. The new engine is a 12.8-liter 6R30 turbocharged intercooled diesel engine with 394-421 PS and 2,000-2,100 Nm. The new 6R30 engine also complies with the JH25 mode heavy-duty fuel efficiency standards.
Nissan revised the piston design to accommodate the forced induction by adding extended oil squirters and oil cooling the pistons. Crankshafts were also updated to suit turbo engines. The fuel pumps were upgraded to an 11mm plunger style on these models to handle the increase of fuel supply needed for the turbo application.
Because a turbocharged engine has a higher operating temperature they used sodium filled exhaust valves and a thermostat controlled oil cooler (air/oil model). In 1983 the B23 was introduced to the United States market as a B23F engine. Also introduced in 1983, the "intercooler boost system" (IBS) was introduced for the B21FT motors.
A ring-shaped oil cooler core was built into the BMW-provided forward cowl, just behind the fan. The outer portion of the oil cooler's core was in contact with the main cowling's sheetmetal, to possibly act as a heat sink. Comprising the BMW-designed forward cowl, in front of the oil cooler was a ring of metal with a C-shaped cross-section ...
The oil collects in sump (1), is withdrawn continuously by scavenge pump (2) and travels to the oil tank (3), where gases entrained in the oil separate and the oil cools. Gases (6) are returned to the engine sump. Pressure pump (4) forces the de-gassed and cooled oil (5) back to the engine's lubrication points (7).