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  2. Active valve control system - Wikipedia

    en.wikipedia.org/wiki/Active_valve_control_system

    The active valve control system (AVCS) is an automobile variable valve timing technology used by Subaru. 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 ...

  3. Subaru FB engine - Wikipedia

    en.wikipedia.org/wiki/Subaru_FB_engine

    Subaru claims a 28-percent reduction in friction losses, mainly due to lighter pistons and connecting rods. [4] [5] A compact oil pump is also credited with contributing to the reduction in friction losses. [1] The FB has a 10% improvement in fuel economy [1] with the power coming on sooner and the torque band being broader. [6]

  4. Subaru EJ engine - Wikipedia

    en.wikipedia.org/wiki/Subaru_EJ_engine

    Because they are non-interference engines, if the timing belt fails, the engine of the models up to 1995 will not be damaged. The oil pump is driven directly from the crank shaft and the waterpump by the timing belt. All DOHC and 1998–up SOHC EJ engines are interference engines, if the timing belt fails the valves will likely be damaged.

  5. List of Subaru engines - Wikipedia

    en.wikipedia.org/wiki/List_of_Subaru_engines

    The (Japanese: Subaru EL engine) replaced the EJ15 and is used in the JDM Subaru Impreza 1.5R (series GD, GG, GE, GH) starting with model year 2006. It is based on the EJ engine and shares many components, like the crankshaft from the EJ25. It has DOHC cylinder heads with AVCS variable valve timing on the intake. [22] [23] Displacement: 1,498 cc

  6. Subaru six-cylinder engines - Wikipedia

    en.wikipedia.org/wiki/Subaru_six-cylinder_engines

    Subaru Alcyone VX. Created as a refined luxury engine with improved power over the EA82T, Subaru introduced the ER27 engine in November 1985 for the Subaru ACX-II concept car, shown at the Tokyo Motor Show and billed as the 'concept car of the near future.' [2] The concept went into production as the Subaru Alcyone VX (Subaru XT6 in North America) in August 1987, [3] the exclusive application ...

  7. Subaru FA engine - Wikipedia

    en.wikipedia.org/wiki/Subaru_FA_engine

    The FA20D features both direct and port injection (Toyota's D-4S injection system) and Subaru AVCS variable valve timing system. It is used in the Subaru BRZ, and is identified by a Toyota engine family code known as the 4U-GSE, which is installed in the Toyota 86 and the Scion FR-S. [5] According to Subaru, 0W-20 oil is recommended. Wards Auto ...

  8. Ignition timing - Wikipedia

    en.wikipedia.org/wiki/Ignition_timing

    Pressure in cylinder pattern in dependence on ignition timing: (a) - misfire, (b) too soon, (c) optimal, (d) too late. In a spark ignition internal combustion engine, ignition timing is the timing, relative to the current piston position and crankshaft angle, of the release of a spark in the combustion chamber near the end of the compression stroke.

  9. Valve timing - Wikipedia

    en.wikipedia.org/wiki/Valve_timing

    In an external combustion engine, such as a steam engine, the control of the valve timing is by the valve gear. In a typical piston valve arrangement, the timing of the intake and exhaust events for each cylinder are inextricably related as they are governed by the movement of a single piston uncovering two ports. However, the duration of the ...

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