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EGR valve the top of box on top of the inlet manifold of a Saab H engine in a 1987 Saab 90. In internal combustion engines, exhaust gas recirculation (EGR) is a nitrogen oxide (NO x) emissions reduction technique used in petrol/gasoline, diesel engines and some hydrogen engines. [1]
The crankcase air outlet, where the PCV valve is located, is generally placed as far as possible from the crankcase breather. For example, the breather and outlet are frequently on opposite valve covers on a V engine, or on opposite ends of the valve cover on an inline engine. The PCV valve is often, but not always, placed at the valve cover ...
A blowoff valve is designed to release pressure in the intake system when the throttle is closed. A "recirculating" type blowoff valve releases the pressurised air back into the non-pressurized section of the intake (i.e. upstream of the turbocharger), while an "atmospheric venting" type blowoff valve dumps the air directly into the atmosphere.
The lower intake eliminated the EGR valve. The LU3 also received a "quiet cam" to help reduce vibration at both idle and high engine speeds. This camshaft used the same lift and duration as the older design, but the cam was reprofiled to keep the valve lifters in full contact with the cam lobes as the cam ramps down. [7]
Cylinder head of Honda K20Z3.This engine uses continuously variable timing for the inlet valves. Variable valve timing (VVT) is the process of altering the timing of a valve lift event in an internal combustion engine, and is often used to improve performance, fuel economy or emissions.
These 1.4 L (1,399 cc) SOHC 8-valve turbo diesel engines with bore and stroke of 73.7 mm × 82 mm (2.90 in × 3.23 in), and compression ratio 18.0:1 were shipped to Valencia (now in the Mazda 2 DE to Hiroshima or Hofu plants) and mounted into Mazda 2 DY and Mazda 2 DE together with a 5-speed manual transmission. The engine's maximum power is 50 ...