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Engine fuel economy system
Variable Cylinder Management (VCM) is Honda's term for its variable displacement technology, which saves fuel by deactivating the rear bank of 3 cylinders
Variable_Cylinder_Management
Reciprocating internal combustion engine
(which use Variable Timing Control [VTC] instead). One unique feature of some J-family engine models is Honda's Variable Cylinder Management (VCM) system
Honda_J_engine
Chrysler automobile technology
General Motors' Active Fuel Management, and Honda's Variable Cylinder Management, it deactivates four of the V8's cylinders when the throttle is closed
Multi-Displacement_System
Automobile variable valve timing technology
using i-VTEC combine SOHC VTEC operation with Honda VCM (Variable Cylinder Management) variable displacement technology to improve fuel economy under light
VTEC
General Motors' Active Fuel Management, and Honda's Variable Cylinder Management, it deactivates one bank of the engine's cylinders when the throttle is closed
Active_Cylinder_Control
Combustion engine technology
Variable displacement is an automobile engine technology that allows the engine displacement to change, usually by deactivating cylinders, for improved
Variable_displacement
Trademarked variable displacement technology
2019. Variable displacement Honda's Variable Cylinder Management (VCM) Chrysler's Multi-Displacement System (MDS) Daimler AG's Active Cylinder Control
Active_Fuel_Management
Honda research and development program
which used a new Variable Cylinder Management (VCM) technology that runs on six cylinders during acceleration but used only three cylinders during cruising
Honda_advanced_technology
Mid-size crossover SUV
new FWD models featured Honda's Variable Cylinder Management (VCM) system, which can deactivate up to three cylinders under light load to increase fuel
Honda_Pilot
Minivan by Honda for the North American and Chinese market
a version of Variable Cylinder Management (VCM) that only has a 3 cylinder and 6 cylinder mode as opposed to the 3-, 4-, and 6-cylinder modes found on
Honda_Odyssey_(North_America)
Japan's home market for vehicles
2003 Honda Inspire featured the first application of Honda's Variable Cylinder Management. However, the 2003 Honda Accord V6, which was the same basic
Japanese_domestic_market
Motor vehicle
V6. This Inspire marks the first time Honda introduced their Variable Cylinder Management technology. In October 2005, the fourth-generation Inspire received
Honda_Inspire
Mid-size luxury car by Acura (2014-2020)
injected 3.5-liter Earth Dreams V6 gasoline engine using VTEC and Variable Cylinder Management (VCM) marketed as i-VTEC like other J-series Honda engines. It
Acura_RLX
Mid-Size luxury crossover SUV
5-liter direct injected Earth Dreams V6 gasoline engine with Variable Cylinder Management. A front-wheel drive (FWD) model is available for the first time
Acura_MDX
Grand touring car manufactured since 2003
year GT W12 models gained a new engine design which included variable cylinder management to reduce emissions and at the same time had a power increase
Bentley_Continental_GT
Motor vehicle
of the six cylinders under certain conditions for better fuel economy (a technology that Honda calls VCM or Variable Cylinder Management). The new engine
Honda Accord (North America seventh generation)
Honda_Accord_(North_America_seventh_generation)
Motor vehicle
is an all new 3.0L V6 i-VTEC J30A with the VCM (variable cylinder management), shutting-off 3 cylinders on one bank of the V6 when reduced power is needed
Honda_Elysion
Inline-four engine
Applications Integrated Motor Assist (IMA) hybrid system, features Variable Cylinder Management (VCM) Applications Additional notes LDA-MF3 and LDA1 engine feature
Honda_L_engine
Motor vehicle
Updated to three stage i-VTEC and VCM (Variable Cylinder Management), which permits deactivation of all four cylinders when cruising at moderate speed to
Honda Civic (eighth generation)
Honda_Civic_(eighth_generation)
Entry-level luxury car by Acura (1996–2014)
Honda Accord V6 with minor trim changes, and the addition of Variable Cylinder Management, which shuts off half of the engine when not needed to boost
Acura_TL
Process of altering the timing of a valve lift event
pushes the intake-charge back, out from the cylinder, polluting the intake manifold with exhaust. Early variable valve timing systems used discrete (stepped)
Variable_valve_timing
Motor vehicle
improved fuel efficiency due to the Variable Cylinder Management (VCM) system, which shuts off two or three of the cylinders depending on the type of driving
Honda Accord (North America eighth generation)
Honda_Accord_(North_America_eighth_generation)
Topics referred to by the same term
and professional poker player Variable Cylinder Management, Honda's term for a variable-displacement technology Variable Coding and Modulation, a technique
VCM
Reciprocating internal combustion engine
four valves per cylinder Aspiration Single turbocharger or twin-turbochargers with air-to-air intercooler, electronically actuated variable geometry with
Ford_AJD-V6/PSA_DT17
Reciprocating internal combustion engine
was updated in 2000 as the AQN/AZX engine, with four valves per cylinder and variable valve timing, producing 170 PS (125 kW; 168 hp) at 6200 RPM and
VR5_engine
Internal combustion engine technology
In internal combustion engines, a variable-length intake manifold (VLIM),variable intake manifold (VIM), or variable intake system (VIS) is an automobile
Variable-length intake manifold
Variable-length_intake_manifold
Type of turbocharging technology
its 3.6-litre horizontally opposed six-cylinder gasoline engine. In 2007, Acura introduced the RDX with variable geometry turbocharger following a (VFT)
Variable-geometry turbocharger
Variable-geometry_turbocharger
pressure in the two cylinder banks, two-position variable swirl flaps integrated into the intake tract fuel system & engine management common rail (CR) direct
List of Volkswagen Group diesel engines
List_of_Volkswagen_Group_diesel_engines
Reciprocating internal combustion engine
strong low-end torque. In addition to GM's active fuel management, start-stop system, and variable valve timing, which are already featured on GM's other
GM_L3B_engine
valvetrain cast aluminium alloy; four valves per cylinder, double overhead camshafts (DOHC), intake variable valve timing aspiration Garrett GT12 turbocharger
List of discontinued Volkswagen Group petrol engines
List_of_discontinued_Volkswagen_Group_petrol_engines
Reciprocating internal combustion engine
and engine management are all unique to the Aston Martin version. In May 2008, Aston Martin released a new design that used pressed cylinder liners instead
Jaguar_AJ-V8_engine
Straight-6 DOHC piston engine
of local fuel. The engine is equipped with a dual overhead cam 24 valve cylinder head and the crankshaft is held in place with 36 main bearing cap bolts
BMW_N52
Reciprocating internal combustion engine
pressure in the two cylinder banks, two-position variable swirl flaps integrated into the intake tract fuel system & engine management electric low-pressure
Volkswagen-Audi_V8_engine
Cylinders used to record live opera in the early 1900s
The cylinders contain short fragments of actual operatic performances from the Italian, German and French repertoires. Despite their variable quality
Mapleson_Cylinders
Series of turbocharged, direct-injection gasoline engines
Type-turbocharged, direct gasoline-injected inline four-cylinder engine with twin independent variable-camshaft timing Displacement-1,596 cc (1.6 L; 97 cu
Ford_EcoBoost_engine
Family of V8 and V6 engines
cylinder heads, and include direct injection, piston cooling jets, active fuel management, variable displacement oil pump, and continuously variable valve
General Motors LS-based small-block engine
General_Motors_LS-based_small-block_engine
Container to supply high pressure gas for diving operations
A diving cylinder or diving gas cylinder is a gas cylinder used to store and transport high-pressure gas used in diving operations. This may be breathing
Diving_cylinder
Reciprocating internal combustion engine
9-liter 6B/6BT/6BTA Cummins diesel engines. The 3.9 is an inline four-cylinder, either naturally aspirated (4B) or turbodiesel (4BT/4BTA), which was popular
Cummins_B_Series_engine
Reciprocating internal combustion engine
replaced by the BMW N46 four-cylinder engine. Compared with its M43 predecessor, the N42 features a DOHC valvetrain, VANOS (variable valve timing) and an aluminium
BMW_N42
Reciprocating internal combustion engine
the cylinders. The B58, like its predecessor the N55, features direct fuel injection, variable valve timing (called double VANOS by BMW), and variable valve
BMW_B58
Reciprocating internal combustion engine
head with chain driven DOHC with 4 valves per cylinder, Delphi common rail direct injection (CRDi), variable geometry turbocharger (VGT) and intake air swirl
Hyundai_U_engine
Toyota 4-cylinder engine introduced in 2008
aluminium DOHC cylinder head. The engine series shares many of the technologies in the AZ engine, while incorporating features such as variable valve timing
Toyota_AR_engine
Turbocharged inline-four petrol engine
family of 3-cylinder (B38/B37), 4-cylinder (B48/B47) and 6-cylinder (B58/B57) engines, which use a displacement of 500 cc (30.5 cu in) per cylinder. A SULEV
BMW_B48
Computer that adjusts electronics in an internal combustion propulsion system
valve, via spark advance or the electronic throttle system) Variable valve timing and/or variable valve lift systems The sensors used by the ECU include:
Engine_control_unit
Reciprocating internal combustion engine
a different set of cylinder liners. The engine also features an aluminum cylinder head with double overhead camshafts and variable valve timing. The 1
World_Gasoline_Engine
Timing of valve closing in engines
slide valves. Cylinder head porting Valve gear Bennett, Sean (February 2012). Medium/Heavy Duty Truck Engines, Fuel & Computerized Management Systems (4th ed
Valve_timing
Reciprocating internal combustion engine
die-cast aluminium block and aluminium DOHC cylinder heads. The engine series also features 4 valves per cylinder, forged steel connecting rods and crankshaft
Toyota_GR_engine
incorporates variable intake and exhaust timing. The only aspect to be carried over from the EA111 engine that preceded it is the 82 mm cylinder spacing.
List of Volkswagen Group petrol engines
List_of_Volkswagen_Group_petrol_engines
Kind of engine made by Nissan
cooled automobile engines with variable valve timing co-developed by Renault and Nissan. They all have four valves per cylinder. Renault calls this engine
Nissan_MR_engine
Method of printing
tapered, or variable diameter. Digital cylinder printing is a method of reproducing black-and-white or full-color images and text onto cylindrical objects
Digital_printing
Reciprocating internal combustion engine
alloy cylinder heads, fuel injection, overhead camshaft and later multi-valve double overhead camshaft design, variable intake runners, variable valve
Ford_straight-six_engine
Reciprocating internal combustion engine
II block with cylinder head improvements, new camshaft design, E37 engine control module, 58X crankshaft reluctor ring, dual variable valve timing, digital
GM_Ecotec_engine
Reciprocating internal combustion engine
1999. In 1998, the "technical update" (M52TÜ) upgrades included adding variable valve timing to the exhaust camshaft. The M52 was replaced by the M54 in
BMW_M52
BMW engine manufactured from 2009 to 2021
2 sets of exhaust duct to turn 1 turbine wheel, with cylinders 1–3 and 4–6. The engine management system is Bosch MEVD 17.2, and compatible fuels are ROZ
BMW_N55
Cylindrical container for storing pressurised gas
A gas cylinder is a pressure vessel for storage and containment of gases at above atmospheric pressure. Gas storage cylinders may also be called bottles
Gas_cylinder
Reciprocating internal combustion engine
June 1991, the first five-cylinder variant in form of the B5254F hit the market. It was equipped with V-VIS (Volvo Variable Intake System) which was designed
Volvo_Modular_Engine
Reciprocating internal combustion engine
throttle body for each cylinder, single-VANOS (variable valve timing on the intake camshaft), Bosch Motronic M3.3 engine management and redesigned intake
BMW_M50
Reciprocating internal combustion engine
The Hyundai R engine is a diesel 4-cylinder automobile engine produced by Hyundai Motor Group, it was announced during the Advanced Diesel Engine Technology
Hyundai_R_engine
Grass cutting device
self-contained power source for lawn mowers is a small 4-stroke (typically one-cylinder) internal combustion engine. Smaller mowers often lack any form of self-propulsion
Lawn_mower
Reciprocating internal combustion engine
injections, thus allowing for a more complete, quieter combustion in the cylinder. Compared to the first-generation JTD engines (Unijet system), which only
Fiat_JTD_engine
Reciprocating internal combustion engine
high rpm. Some Bosch engine management system have the ability to advance and retard ignition timing in individual cylinders, which would be impossible
Alfa_Romeo_Twin_Spark_engine
Reciprocating internal combustion engine
Huck, Armin (March 2002). "The first continuously variable intake system in the new eight-cylinder engine from BMW". MTZ Worldwide. 63 (3): 2–6. doi:10
BMW_N62
Reciprocating internal combustion engine
including: All-new cylinder block casting All-new cylinder head castings Strengthened connecting rods Forged steel crankshaft Continuously variable valve timing
GM_High_Feature_engine
Sportscar racing series
degree cylinder angle, 4 valves per cylinder, DOHC, petrol direct injection, emission control by two race catalytic converters Engine management: Bosch
Audi_R8_LMS_Cup
Reciprocating internal combustion engine
Valve springs: Wire-type Cylinder head: 4 valves (titanium) per cylinder Fuel injection: Astemo/Bosch 6x direct in-cylinder fuel. Astemo/Bosch 6x high
Chevrolet_Indy_V6
Family of internal combustion engines
again features a completely new cylinder head which uses five valves per cylinder instead of four. It uses Toyota's Variable Valve Timing (VVT) system on
Toyota_A_engine
Reciprocating internal combustion engine
direct fuel injection, camshaft phasing, variable displacement/start-stop cylinder deactivation, and variable-pressure oiling system with piston-cooling
Cadillac_twin-turbo_V8
Reciprocating internal combustion engine
four-cylinder four-stroke car engines introduced in 2001. The K-series engines are equipped with DOHC valvetrains and use roller rockers on the cylinder head
Honda_K_engine
Reciprocating internal combustion engine
straight-4 engine, 16 valve DOHC; EFI; with variable valve timing. This engine has two fuel injectors per cylinder to improve fuel economy and reduce emissions
Nissan_HR_engine
Reciprocating internal combustion engine
(2,960 cc) M104 featured KE-Jetronic fuel injection, cylinder specific ignition-timing, variable valve timing and under-piston cooling jets. Specifications
Mercedes-Benz_M104_engine
Reciprocating internal combustion engine
turbocharged straight-6 common rail diesel engines. The engines utilize variable geometry turbochargers and Bosch piezo-electric injectors. The engine jointly
BMW_N57
Reciprocating internal combustion engine
version. Both offered variable cam timing, though only the turbo version varies both the intake and exhaust valves. On top of the variable cam timing used on
Volvo_SI6_engine
Reciprocating internal combustion engine
produced since 2007. Cylinder bore and stroke is 91 mm × 96 mm (3.58 in × 3.78 in). This series saw the introduction of a variable geometry turbocharger
Hyundai_A_engine
Reciprocating internal combustion engine
Duratec RS). It was also used in the Focus ST170 with a cylinder head modified by Cosworth with Variable Valve Timing on the inlet cam and had 170 bhp (127 kW;
Ford_Zetec_engine
Automobile variable valve timing technology
VVT-i, or Variable Valve Timing with intelligence, is an automobile variable valve timing petrol engine technology manufactured by Toyota Group and used
VVT-i
Combustion chamber capacity ratio
filling the cylinder with liquid and then measuring the volume of the used liquid. Most engines use a fixed compression ratio, however a variable compression
Compression_ratio
Reciprocating internal combustion engine
five-cylinder engine with 20 valves and double overhead camshafts. In all but one late version it has a VGT turbocharger of the type VNT (variable nozzle
Volvo_D5_engine
Reciprocating internal combustion engine
aluminum-block, dual overhead cam V6 engine with a 60° bank angle and cast iron cylinder liners — introduced with the 1993 Ford Mondeo and used widely through 2012
Ford_Duratec_V6_engine
Reciprocating internal combustion engine
The Hyundai D engine is a family of 3-cylinder and 4-cylinder diesel engines produced by Hyundai Motor Company under license from VM Motori. The D-line
Hyundai_D_engine
Mechanical device for storing rotational energy
density of the cylinder, r {\displaystyle r} is the radius of the cylinder, and ω {\displaystyle \omega } is the angular velocity of the cylinder. A rimmed
Flywheel
Reciprocating internal combustion engine
interchangeable. Both contain an aluminium block and cylinder head with iron cylinder liners, variable valve timing is fitted to both camshafts (called "double-VANOS")
BMW_M54
Reciprocating internal combustion engine
ownership and management in August, 2010. The new management intends to offer a single engine across all Volvo models, ultimately a four cylinder. At that
Volvo_B8444S_engine
Reciprocating internal combustion engine
32-valve design with high-pressure common-rail direct injection and aluminum cylinder heads. The following trucks use the LB7: Chevrolet Kodiak/GMC TopKick Chevrolet
Duramax_V8_engine
Scuba set with variable-density buoyancy control
Avelo diving system is a single cylinder, back-mounted scuba set with variable density buoyancy control. The gas cylinder is a carbon fibre over aluminium
Avelo_diving_system
Automobile engine; redesign of the Saab B
families. Saab continued to use its Trionic engine management system with the Ecotec. Saab Variable Compression engine Saab V8 "Brefs" [In brief]. Echappement
Saab_H_engine
Reciprocating internal combustion engine
version of the C20A) The variable length intake manifold used six individual small-bore intake runners below 3,500 rpm for each cylinder and added an additional
Honda_C_engine
Timing of the release of a spark in a combustion engine
pressure in the cylinder will occur sometime after the piston reaches TDC allowing the ignited mixture to push the piston down the cylinder with the greatest
Ignition_timing
Reciprocating internal combustion engine
Motori from Penske Automotive in 2007. In 2010, VM released the A 428 (four-cylinder, 2.8 L displacement), developed from the earlier R 428, which was sold
Duramax_I4_engine
Type of rigid buoyancy control device
motion. The Avelo scuba system uses a variable-buoyancy pressure vessel, which is both the primary breathing gas cylinder and the scuba buoyancy compensator
Variable-buoyancy pressure vessel
Variable-buoyancy_pressure_vessel
Reciprocating internal combustion engine
cast-iron engine block with cast aluminium alloy cylinder heads. The cylinder heads contain four valves per cylinder actuated by dual overhead camshafts which
General_Motors_54°_V6_engine
Reciprocating internal combustion engine
transmission bolt pattern, the same engine mounts, and in many versions, a cylinder head featuring "siamesed" exhaust passages, which reduced the three exhaust
Ford_Cologne_V6_engine
Reciprocating internal combustion engine
primarily for fuel economy and featured a different cylinder head than other CVH engines. The Ford variable venturi carburetor was replaced by a Weber 28/30
Ford_CVH_engine
Reciprocating internal combustion engine
features include single-VANOS (variable valve timing for the intake camshaft) and electronic throttle control. The engine management was updated to Motronic
BMW_M62
External mixture preparation system for internal combustion engines
injection (SPI) are used. In an MPI system, there is one fuel injector per cylinder, installed very close to the intake valve(s). In an SPI system, there is
Manifold_injection
Reciprocating internal combustion engine
featured optional displacement on demand or "Active Fuel Management" which deactivates a bank of cylinders under light load to increase highway fuel economy
GM_High_Value_engine
Reciprocating internal combustion engine
6 L; 97.4 cu in (1,596 cc) Ti-VCT (Twin independent Variable Camshaft Timing) version includes variable valve timing, and generates more power and torque
Ford_Sigma_engine
Reciprocating internal combustion engine
also use twin-turbos – one turbocharger per VR cylinder bank: Fuel system, ignition system, engine management Two linked common rail fuel distributor rails
Volkswagen_Group_W-12_engine
Reciprocating internal combustion engine
000 rpm. Main improvement is adding VVT (variable valve timing) to the engine. The 998 cc (1.0 L) three-cylinder engine makes 69 PS (51 kW; 68 hp) at 6
Hyundai_Kappa_engine
Engine configuration
A W8 engine is an eight-cylinder piston engine with four banks of two cylinders each, arranged in a W configuration. In practice, the W8 engine is created
W8_engine
Type of brake used on steam locomotives
steam brake cylinders from the locomotive boiler via a valve (the brake valve) which may have several fixed settings or be infinitely variable. The piston
Steam_brake
VARIABLE CYLINDER-MANAGEMENT
VARIABLE CYLINDER-MANAGEMENT
Boy/Male
Tamil
Amiable
Boy/Male
Arabic, Indian, Muslim
Valuable
Biblical
cylinder; circuit; district; wheel
Boy/Male
Arabic, Bengali, Hindu, Indian, Kannada, Marathi, Muslim, Telugu
Valuable
Boy/Male
Hindu, Indian
Valuable
Girl/Female
Indian
Valuable
Boy/Male
Hindi
Valuable.
Boy/Male
Anglo, British, English
Variable
Surname or Lastname
English
English : from the feminine personal name Mirabel, equated in medieval records with Latin mirabilis ‘marvellous’, ‘wonderful’ (in the sense ‘extraordinary’).
Girl/Female
Gujarati, Hindu, Indian
Valuable
Surname or Lastname
English (of Irish origin)
English (of Irish origin) : variant of Cavender.
Girl/Female
Tamil
Valuable
Surname or Lastname
Swedish
Swedish : ornamental name from lind ‘lime tree’ + either the German suffix -er denoting an inhabitant, or the surname suffix -ér, derived from the Latin adjectival ending -er(i)us.English (mainly southeastern) : variant of Lind 2.German : habitational name from any of numerous places called Linden or Lindern, named with German Linden ‘lime trees’.
Boy/Male
Bengali, Gujarati, Hindu, Indian, Punjabi, Sikh, Traditional
Lord Krishna
Boy/Male
Hawaiian
Valuable.
Girl/Female
Assamese, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
Valuable
Boy/Male
Vietnamese
Valuable.
Boy/Male
Hindu
Girl/Female
Armenian
Valuable.
Boy/Male
Hindu
Amiable
VARIABLE CYLINDER-MANAGEMENT
VARIABLE CYLINDER-MANAGEMENT
Girl/Female
Muslim
Shining flower
Surname or Lastname
English
English : occupational name for a keeper of goats, Middle English gotherde, from Old English gÄt ‘goat’ + hierde ‘herdsman’, ‘keeper’.German : from a personal name composed of the elements gÅd ‘good’ or god, got ‘god’ + hard ‘hardy’, ‘brave’, ‘strong’.
Boy/Male
Muslim
Jasmine
Boy/Male
Buddhist, Indian
Lord Budha
Girl/Female
Hindu, Indian
One who Knows Everything
Surname or Lastname
English
English : variant of Harwood.
Boy/Male
Welsh
Legendary son of Gwydaawg Gwyr.
Boy/Male
Indian, Punjabi, Sikh
Love of God
Girl/Female
Muslim/Islamic
Good looking attractive
Boy/Male
Tamil
Rahulraj | ராஹà¯à®²à®°à®¾à®œ
Efficient, Capable
VARIABLE CYLINDER-MANAGEMENT
VARIABLE CYLINDER-MANAGEMENT
VARIABLE CYLINDER-MANAGEMENT
VARIABLE CYLINDER-MANAGEMENT
VARIABLE CYLINDER-MANAGEMENT
a.
Friendly; kindly; sweet; gracious; as, an amiable temper or mood; amiable ideas.
adv.
In a variable manner.
n.
Those parts of the sea where a steady wind is not expected, especially the parts between the trade-wind belts.
a.
Worthy; estimable; deserving esteem; as, a valuable friend; a valuable companion.
n.
Arable land; plow land.
n.
An invariable quantity; a constant.
n.
The revolving platen or bed which produces the impression or carries the type in a cylinder press.
n.
A shifting wind, or one that varies in force.
a.
Invariable.
n.
A kind of brick. See Dutch clinker, under Dutch.
a.
Liable to undergo a judicial examination; properly coming under the cognizance of a court; as, a cause may be triable before one court which is not triable in another.
n.
A machine, used for the purpose of giving cloth, paper, etc., a smooth, even, and glossy or glazed surface, by cold or hot pressure, or for watering them and giving them a wavy appearance. It consists of two or more cylinders revolving nearly in contact, with the necessary apparatus for moving and regulating.
a.
Possessing sweetness of disposition; having sweetness of temper, kind-heartedness, etc., which causes one to be liked; as, an amiable woman.
a.
Arable; tillable.
a.
Having value or worth; possessing qualities which are useful and esteemed; precious; costly; as, a valuable horse; valuable land; a valuable cargo.
a.
Liable to vary; too susceptible of change; mutable; fickle; unsteady; inconstant; as, the affections of men are variable; passions are variable.
n.
That which is variable; that which varies, or is subject to change.
v. t.
To represent by parable.
n.
A quantity which may increase or decrease; a quantity which admits of an infinite number of values in the same expression; a variable quantity; as, in the equation x2 - y2 = R2, x and y are variables.
a.
Having the capacity of varying or changing; capable of alternation in any manner; changeable; as, variable winds or seasons; a variable quantity.