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  2. Variable camshaft timing - Wikipedia

    en.wikipedia.org/wiki/Variable_camshaft_timing

    For twin-cam or DOHC engines, VCT was used on either the intake or exhaust camshaft. (Engines that have VCT on both camshafts are now designated as Ti-VCT.↓) The use of variable camshaft timing on the exhaust camshaft is for improved emissions, and vehicles with VCT on the exhaust camshaft do not require exhaust gas recirculation (EGR) as retarding the exhaust cam timing achieves the same ...

  3. Camshaft - Wikipedia

    en.wikipedia.org/wiki/Camshaft

    A camshaft operating two valves. A camshaft is a shaft that contains a row of pointed cams in order to convert rotational motion to reciprocating motion.Camshafts are used in piston engines (to operate the intake and exhaust valves), [1] [2] mechanically controlled ignition systems and early electric motor speed controllers.

  4. Timing belt (camshaft) - Wikipedia

    en.wikipedia.org/wiki/Timing_belt_(camshaft)

    The 1966 Pontiac OHC Six engine was the first US mass-produced vehicle to use a timing belt, [21] [22] while the 1966 Fiat Twin Cam engine was the first mass-produced engine to use a timing belt with twin camshafts. Carmakers began to adopt timing belts in the 1970s and compared to timing chains are less expensive, smaller, lighter, quieter ...

  5. List of automobiles known for negative reception - Wikipedia

    en.wikipedia.org/wiki/List_of_automobiles_known...

    The North American Renault Fuego sports coupe has earned negative retroactive recognition, mainly for its numerous major reliability problems. Car and Driver retroactively described the Fuego as being "shaped like a walrus with gas.” [91] Hemmings Motor News wrote of how "The Fuego soon developed a reputation for unreliable electronics and ...

  6. VANOS - Wikipedia

    en.wikipedia.org/wiki/VANOS

    The first-generation single VANOS system adjusts the timing of the intake camshaft to one of two positions — e.g. the camshaft is advanced at certain engine speeds. [2] [3] VANOS was first introduced in 1992 on the BMW M50 engine used in 3 and 5 Series. In 1998 single infinitely variable VANOS was introduced on the BMW M62 V8 engine. [2]

  7. Overhead camshaft engine - Wikipedia

    en.wikipedia.org/wiki/Overhead_camshaft_engine

    SOHC design (for a 1973 Triumph Dolomite Sprint) . The oldest configuration of overhead camshaft engine is the single overhead camshaft (SOHC) design. [1] A SOHC engine has one camshaft per bank of cylinders, therefore a straight engine has a total of one camshaft and a V engine or flat engine has a total of two camshafts (one for each cylinder bank).

  8. Helical camshaft - Wikipedia

    en.wikipedia.org/wiki/Helical_camshaft

    But as a production car camshaft must ideally last for the life of the vehicle, there must remain some doubt until really long-term testing is carried out. However, indications are that there would probably be no insoluble long-term problems. [citation needed] A helical camshaft must operate through a lift-multiplying pivoting follower.

  9. Active valve control system - Wikipedia

    en.wikipedia.org/wiki/Active_valve_control_system

    It varies the timing of the valves by using hydraulic oil pressure to rotate the camshaft, known as "phasing", [1] in order to provide optimal valve timing for engine load conditions. The system is closed loop using the camshaft sensors, crankshaft sensors, air flow meter, throttle position as well as oxygen sensors and/or Air-Fuel ratio ...

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