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N-VTC varies valve timing by rotating the affected camshaft relative to the sprocket; valve lift and duration are not altered. This rotation is achieved when an electric solenoid, controlled by the car's ECU, allows pressurized engine oil to flow into and through the cam and into a slave mechanism, axially advancing camshaft timing relative to ...
Nissan QR25DE Engine The QR25DE is a 2.5 L (2,488 cc) variant built with cast steel connecting rods, a steel timing chain, counter-rotating balance shafts , and an aluminum intake manifold. The engine bore and stroke is 89 mm × 100 mm (3.50 in × 3.94 in) and a compression ratio ranging from 9.5:1 to 10.5:1 depending on the vehicle.
In the new Nissan X-Trail, Qashqai and C-Platform Sentra, the MR20DE produces 108 kW; 145 hp (147 PS) at 5100 rpm and 199 N⋅m (147 lb⋅ft) of torque at 4800 rpm. Middle East version of the MR20DE engine that goes in the Nissan Qashqai produces 110 kW; 148 hp (150 PS) at 5200 rpm and 200 N⋅m (148 lb⋅ft) of torque at 4400 rpm.
Nissan does not have a letter designation for the SOHC configuration so the camshaft configuration type is assumed as SOHC if no letter is present. Another example is the MR16DDT engine, which has feature designations that describe an engine with dual overhead camshafts, direct cylinder fuel injection and a single turbocharger.
The Nissan CA would also be developed into a diesel engine, known as the CD, which replaced the four-cylinder LD series. Production of the CA series ceased in 1994. The engine was deemed too expensive to produce due to its cast-iron block, while it also no longer met the ever-changing Japanese emission standards emerging at the time.
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Reduction of engine friction by machining the cam shaft to a crowning mirror-like finish and application of a fluorine coating to the chain guide; Delayed valve closure timing of the intake, achieved through the increased conversion angle of C-VTC and superior timing management, thus reducing pumping loss when idling; Lower idling speed
The Nissan RD engine series is basically a Nissan RB engine design, except that it is only a single overhead cam six-cylinder diesel engine. It was the successor to the Nissan LD and SD six-cylinder engines and was joined by the six-cylinder Nissan TD engine. From 1997 onwards the turbocharged versions were fitted with electronic fuel injection.