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The Jaguar AJ-V6 engine is a piston engine based on the Ford Duratec V6 engine. [2] The Duratec V6 was originally a Porsche design, purchased by the Ford Motor Company with Cosworth finishing the engineering to suit Ford's needs. One notable addition is the use of variable valve timing, a feature also shared with Mazda's version of the engine ...
The solenoid valve regulates the amount of oil pumped by the cam action to either the valve or a bypass reservoir. When pressurized, the hydraulic line behaves like a solid body and transmits the lift schedule imparted by the intake cam directly to the intake valve. When the solenoid is disengaged, a spring takes over valve actuation duties.
The system, developed by Fiat Powertrain Technologies, is an hydraulically-actuated variable valve timing (VVT) technology enabling "cylinder by cylinder, stroke by stroke" control of intake air directly via a gasoline engine's inlet valves. [5] In February 2019, Jaguar Land Rover announced their long-rumoured inline-6 engine.
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. It is increasingly being used in combination with variable valve lift systems.
There are many systems for VVT, which involve changing either the relative timing, duration or opening of the engine's inlet and exhaust valves. One of the first practical VVT systems used a variator to change the phase [note 1] of the camshaft and valves. This simple system cannot change the duration of the valve opening, or their lift.
It was introduced in 2002 to replace the 4.0 SC and produces 390 hp (291 kW; 395 PS) at 6,100 rpm with 399 lb⋅ft (541 N⋅m) of torque at 3,500 rpm. The engine was later updated to AJ34S specification to include Variable Valve Timing as well as other minor updates. 4.2-litre Supercharged V8 in a 2003 Jaguar XKR. Vehicles using this engine:
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