10-616: VCM may refer to: Variable Cylinder Management , Honda's term for a variable-displacement technology Variable Coding and Modulation , a technique for optimizing satellite broadcasts Vermont City Marathon , a marathon in Burlington, Vermont Vecima networks , a maker of telecommunications equipment Victoria Conservatory of Music , a Canadian music school Victoria Coren Mitchell , (Born 18 August 1972) an English writer, presenter and professional poker player Vienna City Marathon ,
20-553: A marathon in Vienna, Austria Vinyl chloride monomer, a compound used to produce polyvinyl chloride Virtual Channel Memory , a memory architecture which was originally developed by NEC Virtual Collection of Masterpieces , a search platform to a collection of Asian masterpieces Voce del padrone-Columbia-Marconiphone , an Italian record label Voice Coil Motor , an electric linear motor used to position hard drive heads. Value Continuum Machine tbd. Topics referred to by
30-401: A step further, allowing the engine to go from 6 cylinders, down to 4, and further down to 3 as the computer sees fit. The most recent version of VCM (VCM-3) reverted to the previous 3- and 6-cylinder operation. Unlike the pushrod systems used by DaimlerChrysler 's Multi-Displacement System and General Motors ' Active Fuel Management , Honda's VCM uses overhead cams . A solenoid unlocks
40-434: Is different from Wikidata All article disambiguation pages All disambiguation pages Variable Cylinder Management Variable Cylinder Management ( VCM ) is Honda 's term for its variable displacement technology, which saves fuel by using the i-VTEC system to disable one bank of cylinders during specific driving conditions—for example, highway driving. The second version of VCM (VCM-2) took this
50-553: Is enabled. Instead of replacing motor mounts, owners often override the VCM with a bypass mechanism, such as an in-line resistor based temperature override module. This has the effect of the vehicle computer believing that a sufficient engine temperature to enable VCM has not been reached. While this cannot guarantee that VCM will be disabled (e.g. differing climates/load scenarios), it can generally keep VCM from engaging under normal driving conditions. More advanced VCM disabler systems include
60-400: The cam followers on one bank from their respective rockers , so the cam follower floats freely while the valve springs keep the valves closed. The system operates through controlling the flow of hydraulic engine oil pressure to locking mechanisms in the cam followers. The engine's drive by wire throttle allows the engine management computer to smooth out the engine's power delivery, making
70-506: The cylinder. When VCM disengages, the engine then misfires if needing to clear the cylinder of oil. This unique type of oil consumption has led to premature failure of parts like spark plugs, catalytic converters, engine mounts, pistons/rings, and cylinder walls. Newer versions of VCM have been developed to improve system reliability but consumers continue to log complaints. Owners of vehicles equipped with VCM frequently face vibration problems due to engine motor mount malfunction while ECO mode
80-400: The rear bank of cylinders. A single solenoid on the rear camshaft is activated to close oil pressure to unlock the cam followers, thereby closing the valves. In theory, the closing of all rear bank valves produces an ‘air spring’ effect. However, the reciprocating effect of the piston with closed valves reportedly produces a vacuum condition where oil can get pulled past the piston rings to flood
90-403: The same term [REDACTED] This disambiguation page lists articles associated with the title VCM . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=VCM&oldid=1181188415 " Category : Disambiguation pages Hidden categories: Short description
100-454: The system nearly imperceptible on some vehicles. When the VCM system disables cylinders, an "ECO" indicator lights on the dashboard, Active Noise Cancellation (ANC) pumps an opposite-phase sound through the audio speakers to reduce cabin noise, and Active Control Engine Mount (ACM) systems reduce vibration. The VCM hydraulic circuit control is defaulted open, meaning that the engine has to build up enough oil pressure on initial startup to disable
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