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Aircraft propulsion system efficient at a range of speeds higher and lower than sound's
A variable cycle engine (VCE), also referred to as adaptive cycle engine (ACE), is an aircraft jet engine that is designed to operate efficiently under
Variable_cycle_engine
Thermodynamic cycle
non-hybrid vehicles now feature engines with variable valve timing. Variable valve timing can run in the Atkinson cycle as a part-time operating regimen
Atkinson_cycle
Type of rocket engine
design is similar to the pulse detonation engine (PDE), the RDE can function continuously because the waves cycle around the chamber, while the PDE requires
Rotating_detonation_engine
Thermodynamic cycle
introduced a small three-cylinder engine with variable intake valve timing that claims to operate an Atkinson cycle at low load (thus the lower power
Miller_cycle
US aircraft engine development program
Air Force with the goal of developing an efficient adaptive cycle, or variable cycle engine for next generation military aircraft; initial demonstrators
Adaptive Versatile Engine Technology
Adaptive_Versatile_Engine_Technology
Engine component
engine compressors provide the compression part of the gas turbine engine thermodynamic cycle. There are three basic categories of gas turbine engine
Gas turbine engine compressors
Gas_turbine_engine_compressors
Airbreathing jet engine which is typically used in aircraft
system Exoskeletal engine Jet car Turbine engine failure Turbojet development at the RAE Variable cycle engine Motorjet "Turbojet Engine". NASA Glenn Research
Turbojet
Engine where combustion is pulsed instead of continuous
functioned to perpetuate the combustion cycle, and attained stable resonance frequency at 43 cycles per second. The engine produced 2,200 N (490 lbf) of static
Pulsejet
Process of altering the timing of a valve lift event
Variable valve timing (VVT) is the process of altering the timing of a valve lift event in an internal combustion engine, and is often used to improve
Variable_valve_timing
Type of rocket engine
The aerospike engine is a type of rocket engine that maintains its aerodynamic efficiency across a wide range of altitudes. It belongs to the class of
Aerospike_engine
priming pump system was used to assist starting of British engines. Aircraft fitted with variable-pitch propellers or constant speed propellers are started
Aircraft_engine_starting
Turbojet engine component
it pays to select an engine cycle with a high specific thrust (i.e. high fan pressure ratio/low bypass ratio). The resulting engine is relatively fuel efficient
Afterburner
Type of engine created by Toyota
The ZR engine is a family of straight-four 16-valve all-aluminum and water cooled gasoline engines with a die-cast aluminum block and variable valve timing
Toyota_ZR_engine
Thermodynamic cycle
The Brayton cycle, also known as the Joule cycle, is a thermodynamic cycle that describes the operation of certain heat engines that have air or some
Brayton_cycle
Computer used for engine control in aerospace engineering
multiple input variables of the current flight condition including air density, power lever request position, engine temperatures, engine pressures, and
FADEC
Compression ratio adjustment technology
Variable compression ratio (VCR) is a technology to adjust the compression ratio of an internal combustion engine while the engine is in operation. This
Variable_compression_ratio
Reciprocating internal combustion engine
found on a K-series engine, and both versions can come with variable timing control (VTC) on the intake cam. The VTEC system on engines like the K20A3 only
Honda_K_engine
Toyota 4-cylinder engine introduced in 2008
Atkinson cycle variant of the 2AR-FE. It has the same bore and stroke, but the cams and pistons are unique. Only the intake valves are variable with VVT-i
Toyota_AR_engine
Propeller with blades that can be rotated to control their pitch while in use
revolution and allows the engine to spin slower while moving an equivalent volume of air, thus maintaining velocity. Another use of variable-pitch propellers is
Variable-pitch propeller (aeronautics)
Variable-pitch_propeller_(aeronautics)
Supersonic atmospheric jet engine
air turboramjet engine is a combined cycle engine that merges aspects of turbojet and ramjet engines. The turboramjet is a hybrid engine that essentially
Ramjet
Reciprocating internal combustion engine
all. The M276 engine features an aluminum engine block with Nanoslide cylinder coating and dual overhead camshafts with independent variable valve timing
Mercedes-Benz_M276_engine
Type of engine issue in aviation
aviation, a flameout (or flame-out) is the run-down of a jet engine or other turbine engine due to the extinguishment of the flame in its combustor. The
Flameout
Aircraft gas turbine function
systems. In a bleedless aircraft such as the Boeing 787, each engine has two variable-frequency electrical generators to compensate for not providing
Bleed_air
Reciprocating internal combustion engine
of straight-3 12-valve and straight-4 16-valve automobile engines with continuously variable valve timing, involving development by Nissan (Aichi Kikai)
Nissan_HR_engine
Turbine engine driving an aircraft propeller
normally a constant-speed (variable pitch) propeller type similar to that used with larger aircraft reciprocating engines, except that the propeller-control
Turboprop
Machine for continuous flow gas compression
first major example of a variable stator design, and today it is a common feature of most military engines. Closing the variable stators progressively,
Axial_compressor
Type of aircraft engine
A propfan, also called a propjet, an open rotor engine, or an open fan engine, is an aircraft engine combining features of turbofans and turboprops. It
Propfan
Term for a compressor in certain aircraft engines in the UK
concept for a variable cycle combat engine. The T-stage is part of the HP rotor in this concept. A US concept for a variable cycle combat engine also uses
T-stage
Airbreathing jet engine designed to provide thrust by driving a fan
maximum cycle temperature, i.e. temperature at which work transfer takes place Axial fan design Gas turbine Turbine engine failure Variable cycle engine Motorjet
Turbofan
Alternative vehicle power source
starter (JFS) is a device similar to an APU but directly linked to a main engine and started by an onboard compressed air bottle. During World War I, the
Auxiliary_power_unit
Internal combustion engine type
A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft
Four-stroke_engine
Brief description of components needed for jet engines
engines. It uses two example engines; the type most familiar to the general public, the modern airliner engine, and the military afterburning engine.
Components_of_jet_engines
American variable-cycle turbofan engine
internally designated as GE37, was a variable cycle afterburning turbofan engine designed by General Electric Aircraft Engines in the late 1980s and early 1990s
General_Electric_YF120
Non-airbreathing engine used to propel a missile or vehicle
common to many large rocket engines or, in some newer rocket systems, by a bleed-off of high-pressure gas from the engine cycle to autogenously pressurize
Rocket_engine
Engine that uses steam to perform mechanical work
The ideal thermodynamic cycle used to analyze this process is called the Rankine cycle. In general usage, the term “steam engine” can refer to either complete
Steam_engine
Piston engine starting system
The Coffman engine starter (also known as a "shotgun starter") was a starting system used on many piston engines in aircraft and armored vehicles of the
Coffman_engine_starter
Internal combustion engine type
A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a power cycle with two strokes of the piston, one up and
Two-stroke_engine
Aircraft engine that produces thrust by emitting a jet of gas
Stipa-Caproni Thrust reversal Turbojet development at the RAE Variable cycle engine Water injection (engine) Note: In Newtonian mechanics kinetic energy is frame
Jet_engine
Power source for starting large engines
initial rotation to start large diesel engines and gas turbines. Compared to a gasoline (petrol) engine, a diesel engine has a very high compression ratio
Air-start_system
Gas turbine used to spin a shaft
turboshaft engine is a form of gas turbine that is optimized to produce shaft horsepower rather than jet thrust. In concept, turboshaft engines are very
Turboshaft
Work done divided by heat provided
classifications of thermal engines- Internal combustion (gasoline, diesel and gas turbine-Brayton cycle engines) and External combustion engines (steam piston, steam
Engine_efficiency
Reciprocating internal combustion engine
(377 N⋅m; 38 kg⋅m) at 3700 rpm when tuned for 91 octane. This engine features Toyota's VVT-i, variable valve timing system on the intake cam and a compression
Toyota_GR_engine
Aerofoil; individual component of a turbine disc
Finally, vibrations from the engine and the turbine itself can cause fatigue failures. Higher temperatures lead to better cycle efficiency in a turbine, calling
Turbine_blade
Type of aviation fuel
type of aviation fuel designed for use in aircraft powered by gas-turbine engines. It is colorless to straw-colored in appearance. The most commonly used
Jet_fuel
25-500-kW internal combustion engine, typically Brayton cycle-type
FlightGlobal. Variable Geometry in Miniature Gas Turbine for Improved Performance and Reduced Environmental Impact Trends of Micro Turbojet Engines within Thrust
Microturbine
Automobile variable valve timing technology
longer time. The switch-over point is variable, between a minimum and maximum point, and is determined by engine load. The switch back from high- to low-rpm
VTEC
Avionics system developed by Airbus
undertake to correct the problem. ECAM is similar to other systems, known as Engine Indicating and Crew Alerting System (EICAS), used by Boeing, Bombardier
Electronic centralised aircraft monitor
Electronic_centralised_aircraft_monitor
Aircraft propulsion component
attack. Therefore, most propellers use a variable pitch mechanism to alter the blades' pitch angle as engine speed and aircraft velocity are changed.[citation
Propeller_(aeronautics)
Jet engine where combustion takes place in supersonic airflow
(26 April 2005). "United States Patent: 6883330: Variable geometry inlet design for scram jet engine". USPTO. Archived from the original on 17 October
Scramjet
Airliner faster than the speed of sound
at take-off. Therefore, a future SST might well benefit from a variable cycle engine, where the specific thrust (and therefore jet velocity and noise)
Supersonic_transport
Robust aircraft electronic recording device
(only 29 were required until 2002), but some systems monitor many more variables. Generally each parameter is recorded a few times per second, though some
Flight_recorder
Aircraft cockpit with electronic displays
engine performance. The Boeing 757 and 767-200/-300 introduced an electronic engine-indicating and crew-alerting system (EICAS) for monitoring engine
Glass_cockpit
Medium to transfer power in hydraulic machinery
the engines directly, or by electrically driven pumps. In modern commercial aircraft these are electrically driven pumps; should all the engines fail
Hydraulic_fluid
Proportion of ducted compared to combusted air in a turbofan engine
The bypass ratio (BPR) of a turbofan engine is the ratio between the mass flow rate of the bypass stream to the mass flow rate entering the core. A 10:1
Bypass_ratio
Measurement indicator of fuel conversion
"EGT margin indicates engine health"' pp. 5–11, Safety first The Airbus Safety magazine, February 2022 "A Variable Cycle Engine for Subsonic Transport
Jet_engine_performance
Turbomachinery concept
several engine cycles that used liquid hydrogen to precool the inlet air to the engine before using it as fuel. Interest in precooled engines saw an emergence
Precooled_jet_engine
Aircraft engine manufacturer
aircraft engine manufacturer, with a 35% market share as of 2020[update]. In addition to aircraft engines, Pratt & Whitney manufactures gas turbine engines for
Pratt_&_Whitney
Engine combustion process
The Diesel cycle is a combustion process of a reciprocating internal combustion engine. In it, fuel is ignited by heat generated during the compression
Diesel_cycle
Reciprocating internal combustion engine
fuel injectors that deliver five squirts of fuel per combustion cycle. The M176 engines are mostly assembled by machine with some components assembled
Mercedes-Benz M176/M177/M178 engine
Mercedes-Benz_M176/M177/M178_engine
Thermodynamic cycle for spark ignition piston engines
Otto cycle (named after Nicolaus Otto) is an idealized thermodynamic cycle that describes the functioning of a typical spark ignition piston engine. It
Otto_cycle
Reciprocating internal combustion engine
Lower-powered versions only have variable cam phasing on the inlet cam (LE0). Selected models also include variable exhaust. The engine weighs 370 lb (170 kg) as
GM_High_Feature_engine
Shock-induced combustion ramjet engine
A shock-induced combustion ramjet engine (abbreviated as shcramjet; also called oblique detonation wave engine; also called standing oblique detonation
Shcramjet
Temporary diversion of an aircraft engine's thrust
systems used on jet engines: the target, clam-shell, and cold stream systems. Some propeller-driven aircraft equipped with variable-pitch propellers can
Thrust_reversal
Nozzle that converts the internal energy of a working gas into propulsive force
fixed geometry, or they may have variable geometry to give different exit areas to control the operation of the engine when equipped with an afterburner
Propelling_nozzle
Type of alert system on aircraft
An engine-indicating and crew-alerting system (EICAS) is an integrated system used in modern aircraft to provide aircraft flight crew with instrumentation
Engine-indicating and crew-alerting system
Engine-indicating_and_crew-alerting_system
Two-propeller design for improving low-airspeed maneuverability
propellers, apply the maximum power of usually a single engine piston powered or turboprop engine to drive a pair of coaxial propellers in contra-rotation
Contra-rotating_propellers
Idealized thermodynamic cycle
done by the system or engine to the environment per Carnot cycle depends on the temperatures of the thermal reservoirs per cycle such as W = QH(TH − TC)/TH
Carnot_cycle
Reciprocating internal combustion engine
of rotations for a thermodynamic cycle to occur. For a 4-cycle engine to complete a thermodynamic cycle, the engine must rotate two complete revolutions
Mazda_Wankel_engine
Total pressure ratio across a jet engine
The engine pressure ratio (EPR) is the total pressure ratio across a jet engine, measured as the ratio of the total pressure at the exit of the propelling
Engine_pressure_ratio
Reciprocating internal combustion engine
and has 4 valves per cylinder. Some versions have VVT-i variable valve timing. The engine typically weighs 69 kg (150 lb) with all ancillaries but no
Toyota_KR_engine
Gas turbine phenomenon
authority digital engine control (FADEC). Modern compressors are carefully designed and controlled to avoid or limit stall within an engine's operating range
Compressor_stall
Inline-four engine
transmission, continuously variable transmission (CVT). With the introduction of the Fit in Canada and the United States, an L-series engine was mated to a traditional
Honda_L_engine
Type of motorcycle
(1,980 cc) version equipped with variable-valve timing debuted on the CVO models. In 2016, the Milwaukee-Eight engines became available on Touring and
Harley-Davidson Milwaukee-Eight engine
Harley-Davidson_Milwaukee-Eight_engine
Automotive piston engine technology
Variable valve lift (VVL) is an automotive piston engine technology which varies the height a valve opens in order to improve performance, fuel economy
Variable_valve_lift
System that converts heat or thermal energy to mechanical work
or closed cycles. In a closed cycle the working fluid is retained within the engine at the completion of the cycle whereas is an open cycle the working
Heat_engine
Angle of a blade in a fluid
fuel economy. It is quite common for an aircraft to be designed with a variable-pitch propeller, to give maximum thrust over a larger speed range. A fine
Blade_pitch
Reciprocating internal combustion engine
engine produced by a Japanese manufacturer. The VR38DETT featured 24 valves controlled by dual overhead camshafts (2 per cylinder head) with variable
Nissan_VR_engine
Sub-class of turbomachinery
the compression in water-chiller cycles. Because of the wide variety of vapor compression cycles (thermodynamic cycle, thermodynamics) and the wide variety
Centrifugal_compressor
Engine fuel systems in aircraft
fuel reaching the engine in case of an engine fire. The second function is to allow the pilot to choose which tank feeds the engine. Many aircraft have
Aircraft_fuel_system
Simplest known jet propulsion device
fresh air mass. This cycle is repeated many times per second. During the brief mass acceleration phase of each cycle, the engine's physical action is like
Valveless_pulsejet
Type of gearbox used on jet engines
the jet engine gearbox speed varies from idle to full power, this creates the need for a constant-speed drive (CSD). The CSD takes the variable speed output
Constant-speed_drive
Russian military turbofan engine variants
turbofan engine variants by NPO Lyulka-Saturn. The original AL-41F, development designation izdeliye 20, was a variable-bypass ratio turbofan engine, designed
Saturn_AL-41
Inline-3 engine
Engineering in 2002. The variable displacement system allows fuel economy to be 15%-20% higher than a variable camshaft engine. Cold start emissions are
Koenigsegg_TFG
Jet nozzle at the tip of some helicopter rotor blades
separate engine, to create jet thrust. Other types use a system that functions similarly to the afterburner (reheat) on a conventional jet engine, except
Tip_jet
Engine in which fuel combusts with an oxidizer
internal combustion engines. By number of strokes: Two-stroke engine Clerk cycle Day cycle Four-stroke engine (Otto cycle) Six-stroke engine By type of ignition:
Internal_combustion_engine
Reciprocating internal combustion engine
system provides two-stage variable valve lift in addition to continuous variable timing. Continuously commanded by the engine control unit, the valve rocker
GM_Ecotec_engine
Linked cyclic series of thermodynamic processes
other state variables within the system, and that eventually returns the system to its initial state. In the process of passing through a cycle, the working
Thermodynamic_cycle
Turboshaft with power from independent exhaust
which is modelled using the Brayton Cycle. The (free) power turbine is on a separate shaft. Turboshaft engines are sometimes characterized by the number
Free-turbine_turboshaft
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
Topics referred to by the same term
Cisco Systems Video Coding Engine, a video data processing hardware component Variable cycle engine, an aircraft thrust engine type Venice Marco Polo Airport
VCE
Part of a jet engine where fuel is burned
scramjet engine where combustion takes place. It is also known as a burner, burner can, combustion chamber or flame holder. In a gas turbine engine, the combustor
Combustor
Theoretical engine
A Carnot heat engine is a theoretical heat engine that operates on the Carnot cycle. The basic model for this engine was developed by French military engineer
Carnot_heat_engine
Reciprocating internal combustion engine
7NR engines have Dual VVT-i standard and the 8NR engine has VVT-iW, enabling it to operate in the Otto cycle as well as a modified-Atkinson cycle to improve
Toyota_NR_engine
Type of engine with no crank
fore-and-aft cycle. However, a split cycle four-stroke version has been patented, GB2480461 (A) published 2011-11-23. The modern free-piston engine was proposed
Free-piston_engine
Model that is used to predict the performance of steam turbine systems
cycle is an idealized thermodynamic cycle describing the process by which certain heat engines, such as steam turbines or reciprocating steam engines
Rankine_cycle
Topics referred to by the same term
United States, an unincorporated community Adaptive Cycle Engine, also Variable cycle engine, a jet engine design that can operate efficiently under varying
Ace_(disambiguation)
Type of aircraft jet engine intake duct
designed with an S-duct layout, but never built. Components of jet engines Variable cycle engine Wikimedia Commons has media related to S-ducts. The Aeronautical
S-duct
Automobile variable valve timing technology
200 / 25 Lotus Elise Caterham 7 Caterham 21 GTM Libra Variable Valve Timing Rover K-Series engine How the MGF VVC really works MG Rover Group Archived
Variable_Valve_Control
Display system in an aircraft's cockpit which displays flight information electronically
of a primary flight display (PFD), multi-function display (MFD), and an engine indicating and crew alerting system (EICAS) display. Early EFIS models used
Electronic flight instrument system
Electronic_flight_instrument_system
System that allows a pilot to control thrust without manually setting fuel flow
system that allows a pilot to control the power setting of an aircraft's engines by specifying a desired flight characteristic, rather than manually controlling
Autothrottle
VARIABLE CYCLE-ENGINE
VARIABLE CYCLE-ENGINE
Girl/Female
Assamese, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
Valuable
Girl/Female
Gujarati, Hindu, Indian
Valuable
Boy/Male
Hindu, Indian
Valuable
Boy/Male
Hindu
Free from the cycle of births and deaths
Boy/Male
Arabic, Bengali, Hindu, Indian, Kannada, Marathi, Muslim, Telugu
Valuable
Girl/Female
Indian
Valuable
Boy/Male
Hawaiian
Valuable.
Boy/Male
Greek
Amiable.
Surname or Lastname
English
English : from the feminine personal name Mirabel, equated in medieval records with Latin mirabilis ‘marvellous’, ‘wonderful’ (in the sense ‘extraordinary’).
Boy/Male
Tamil
Jaramarana Varjita | ஜராமாஂரநா வரà¯à®œà¯€à®¤à®¾
Free from the cycle of births and deaths
Jaramarana Varjita | ஜராமாஂரநா வரà¯à®œà¯€à®¤à®¾
Boy/Male
Arabic, Indian, Muslim
Valuable
Girl/Female
Tamil
Valuable
Boy/Male
Hindu
Amiable
Girl/Female
Armenian
Valuable.
Boy/Male
Hindi
Valuable.
Male
Danish
, amiable.
Boy/Male
Tamil
Amiable
Boy/Male
Anglo, British, English
Variable
Male
Danish
, amiable.
Boy/Male
Vietnamese
Valuable.
VARIABLE CYCLE-ENGINE
VARIABLE CYCLE-ENGINE
Girl/Female
Biblical
Defending, forbidding, taking away.
Boy/Male
Indian, Tamil
Guard; Protector
Girl/Female
Muslim
Virginity
Boy/Male
Hindu, Indian, Sanskrit
Cloud; Comet; Water
Girl/Female
Indian
Excellent, Highest social standing, Tall, Towering
Girl/Female
Tamil
Smiles
Girl/Female
Tamil
Array of clouds
Girl/Female
Bengali, Indian
Small Flower
Boy/Male
Gujarati, Hindu, Indian
King of Wisdom
Boy/Male
American, Australian, Chinese, Danish, Finnish, French, German, Greek, Scandinavian, Swedish
Manly; Priceless; Brave; Warrior
VARIABLE CYCLE-ENGINE
VARIABLE CYCLE-ENGINE
VARIABLE CYCLE-ENGINE
VARIABLE CYCLE-ENGINE
VARIABLE CYCLE-ENGINE
a.
Of or pertaining to a cycle or circle; moving in cycles; as, cyclical time.
adv.
In a variable manner.
p. pr. & vb. n.
of Cycle
n.
An invariable quantity; a constant.
a.
Arable; tillable.
v. t.
To represent by parable.
v. i.
To pass through a cycle of changes; to recur in cycles.
a.
Worthy; estimable; deserving esteem; as, a valuable friend; a valuable companion.
n.
One entire round in a circle or a spire; as, a cycle or set of leaves.
imp. & p. p.
of Cycle
a.
Having the capacity of varying or changing; capable of alternation in any manner; changeable; as, variable winds or seasons; a variable quantity.
a.
Friendly; kindly; sweet; gracious; as, an amiable temper or mood; amiable ideas.
n.
An interval of time in which a certain succession of events or phenomena is completed, and then returns again and again, uniformly and continually in the same order; a periodical space of time marked by the recurrence of something peculiar; as, the cycle of the seasons, or of the year.
n.
Arable land; plow land.
n.
That which is variable; that which varies, or is subject to change.
v. i.
To ride a bicycle, tricycle, or other form of cycle.
a.
Having value or worth; possessing qualities which are useful and esteemed; precious; costly; as, a valuable horse; valuable land; a valuable cargo.
a.
Invariable.
a.
Liable to vary; too susceptible of change; mutable; fickle; unsteady; inconstant; as, the affections of men are variable; passions are variable.
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.