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  2. Variable valve timing - Wikipedia

    en.wikipedia.org/wiki/Variable_valve_timing

    The timing, duration and lift of these valve events has a significant impact on engine performance. Without variable valve timing or variable valve lift, the valve timing is the same for all engine speeds and conditions, therefore compromises are necessary to achieve the desired result in intake and exhaust efficiency . This has been described ...

  3. VTEC - Wikipedia

    en.wikipedia.org/wiki/VTEC

    A Honda K24A Engine with i-VTEC. VTEC (described as Variable Valve Timing & Lift Electronic Control, but stands for Valve Timing Electronically Controlled) is a system developed by Honda to improve the volumetric efficiency of a four-stroke internal combustion engine, resulting in higher performance at high RPM, and lower fuel consumption at low RPM.

  4. Variator (variable valve timing) - Wikipedia

    en.wikipedia.org/wiki/Variator_(variable_valve...

    The inlet camshaft position is advanced 25 degrees, thus increasing valve overlap. It remains in this advanced state until about 5000 rpm when the solenoid switches off, and the variator piston returns the valve timing to its natural state. The variable timing increases the engine's mid-range flexibility and reduces emissions.

  5. Honda advanced technology - Wikipedia

    en.wikipedia.org/wiki/Honda_advanced_technology

    The development of the IMA system is a result of optimizing the various technologies that Honda has built over the years, including the lean-burn combustion, low-emission engines, variable valve timing, high-efficiency electric motors, regenerative braking, nickel-metal hydride (Ni-MH) battery technology and the microprocessor control. [12]

  6. Variable Valve Control - Wikipedia

    en.wikipedia.org/wiki/Variable_Valve_Control

    In order to improve the optimisation of the valve timing for differing engine speeds and loads, the system is able to vary the timing and duration of the inlet valve opening. It achieves this by using a complex and finely machined mechanism to drive the inlet camshafts.

  7. Honda C engine - Wikipedia

    en.wikipedia.org/wiki/Honda_C_engine

    The engine was the second Honda engine ever to utilize Honda's proprietary VTEC variable valve timing system in an automotive application after the B16A, which adjusts cam lift depending on engine RPM and throttle position. VTEC allows the C30A to produce a high maximum power level while maintaining a relatively flat torque curve.

  8. MultiAir - Wikipedia

    en.wikipedia.org/wiki/MultiAir

    For variable valve lift, competing technologies (e.g., Honda's VTEC and BMW's Valvetronic) use electromechanical concepts, achieving valve lift variation via dedicated mechanisms; it can also be combined with camshaft phasers to allow control of both valve lift and phase. In contrast, MultiAir uses managed hydraulic fluid to provide variable ...

  9. Engine control unit - Wikipedia

    en.wikipedia.org/wiki/Engine_control_unit

    Idle speed control (typically either via an idle air control valve or the electronic throttle system) Variable valve timing and/or variable valve lift systems; The sensors used by the ECU include: [2]

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