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Inside the wastegate actuator, a spring acts to open the wastegate, and oil pressure acts to close the wastegate. On the oil output side of the wastegate actuator sits the density controller, an air-controlled oil valve which senses upper deck pressure and controls how fast oil can bleed from the wastegate actuator back to the engine. As the ...
This system consists of an electrically driven water pump and a 3-way rotary valve which allows the engine to maintain proper operating temperatures and quicker warm-ups. Also, a continuously variable oil pump helps to lower parasitic losses and provide proper lubrication and cooling to the engine, especially under high-load conditions. [ 1 ]
The upper part of the valve stem, within the rocker box, is lubricated by oil. If this oil travels unchecked along the valve stem, engine HC emissions will become excessive. To control this, an elastomeric seal is fitted over the top of the valve guide. These may wear or stiffen with age, so are usually replaced whenever valves are removed for ...
The main differences between the naturally aspirated and the turbocharged versions are the cylinder head, injection pump, valves, camshafts, rods, intake and exhaust manifolds and some minor differences like oil feed and return holes for the turbo and different crankcase ventilation system, valve cover and plastic engine cover.
The specifications called for wastegate exhaust pipes to be a minimum of 1.470 inches (inside diameter). The standard pipe diameter was typically 2 or 2½ inches. In addition, the pop-off valves affixed to the cars were to be set at 50 inHg of "boost" for qualifying (down from 80 inHg). USAC issued a last-minute ruling that in-car adjustments ...
Using a turbocharger spool valve to increase exhaust gas flow speed to the (twin-scroll) turbine; Using a butterfly valve to force exhaust gas through a smaller passage in the turbo inlet; Electric turbochargers [51] and hybrid turbochargers. A similar phenomenon that is often mistaken for turbo lag is the boost threshold. This is where the ...
DOHC 4 valves x cyl. Combustion; Turbocharger: Variable geometry (A II only) Wastegate (A I only) Fuel system: Common rail direct injection: Management: Bosch with air system-based charge control: Fuel type: Diesel: Cooling system: Water-cooled: Output; Power output: 110–177 PS (81–130 kW; 108–175 hp) Torque output: 33–46 kg⋅m (324 ...
The N26 is based on the BMW N20, with the following changes: metal fuel lines (instead of rubber), a valve in the fuel tank venting system to test the fuel system for leaks, an electronic wastegate and larger catalytic converters.