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Work done divided by heat provided
Engine efficiency of thermal engines is the relationship between the total energy contained in the fuel, and the amount of energy used to perform useful
Engine_efficiency
System that converts heat or thermal energy to mechanical work
energy to mechanical work. Heat engines distinguish themselves from other types of engines by the fact that their efficiency is fundamentally limited by Carnot's
Heat_engine
Aircraft engine that produces thrust by emitting a jet of gas
turbofan engines. They give higher speed and greater fuel efficiency than piston and propeller aeroengines over long distances. A few air-breathing engines made
Jet_engine
Engine in which fuel combusts with an oxidizer
An internal combustion engine (ICE or IC engine) is a heat engine in which the combustion of a fuel occurs with an oxidizer (usually air) in a combustion
Internal_combustion_engine
Internal combustion engine type
The diesel engine is a technical refinement of the 1876 Otto-cycle engine. Where Otto had realized in 1861 that the efficiency of the engine could be increased
Four-stroke_engine
Type of internal combustion engine that uses compression to create combustion
needed] The diesel engine has the highest thermal efficiency (see engine efficiency) of any practical internal or external combustion engine due to its very
Diesel_engine
Engine that uses steam to perform mechanical work
piston type steam engines were the dominant source of power until the early 20th century. The efficiency of stationary steam engines increased dramatically
Steam_engine
Reciprocating internal combustion engine
improvements resulted in increased engine efficiency that reduced fuel consumption by 10%. The adoption of VVTi, a higher efficiency single turbocharger as well
Toyota_JZ_engine
Performance measure of a device that uses thermal energy
internal combustion engine, steam turbine, steam engine, boiler, furnace, refrigerator, ACs etc. For a heat engine, thermal efficiency is the ratio of the
Thermal_efficiency
Non-airbreathing engine used to propel a missile or vehicle
order to achieve practical thermal efficiency are extreme compared to a non-afterburning airbreathing jet engine. No atmospheric nitrogen is present
Rocket_engine
Reciprocating internal combustion engine
maintenance intervals. To enhance thermal efficiency and structurally rigid lightweight characteristics, the engine utilizes a structural oil pan made of
Mazda_L_engine
Measure of engine efficiency
Volumetric efficiency (VE) in internal combustion engine engineering is defined as the ratio of the equivalent volume of the fresh air drawn into the
Volumetric_efficiency
Measurement indicator of fuel conversion
A jet engine converts fuel into thrust. One key metric of performance is the thermal efficiency; how much of the chemical energy (fuel) is turned into
Jet_engine_performance
Form of thermal efficiency
unit of fuel consumed. It is dependent on several factors including engine efficiency, transmission design, and tire design. In most countries, using the
Fuel_efficiency
Engine designed for use in powered aircraft
links to diagrams) The Aircraft Engine Historical Society Jet Engine Specification Database Aircraft Engine Efficiency: Comparison of Counter-rotating
Aircraft_engine
Maximum attainable efficiency of any heat engine
specifies limits on the maximum efficiency that any heat engine can obtain. Carnot's theorem states that all heat engines operating between the same two
Carnot's theorem (thermodynamics)
Carnot's_theorem_(thermodynamics)
Mixture formation system
can improve engine efficiency and specific power output, and can also reduce exhaust emissions from vehicles. The first production engine to use GDI was
Gasoline_direct_injection
Vehicle with hydrogen internal combustion engine
theoretical efficiency limit is 100%, based on it being an open cycle engine and therefore not limited by Carnot efficiency. In comparison, the efficiency of a
Hydrogen internal combustion engine vehicle
Hydrogen_internal_combustion_engine_vehicle
Degree to which a process minimizes waste of resources
antenna Volumetric efficiency, in internal combustion engine design Lift-to-drag ratio Faraday efficiency, electrolysis Quantum efficiency, a measure of sensitivity
Efficiency
Measure of efficiency in aerospace engineering
vehicles are propelled by heat engines of some kind, usually an internal combustion engine. The efficiency of a heat engine relates how much useful work
Propulsive_efficiency
Idealized thermodynamic cycle
upper limit on the efficiency of any classical thermodynamic engine during the conversion of heat into work, or conversely, the efficiency of a refrigeration
Carnot_cycle
Reciprocating internal combustion engine
smoother operation at that engine speed, and increased engine efficiency.[citation needed] The MZ series has an aluminium engine block and aluminium alloy
Toyota_MZ_engine
Form of electric spacecraft propulsion
of atmospheric drag, requiring periodic altitude boosts – a high-efficiency engine (high specific impulse) for station-keeping would be valuable; theoretically
Ion_thruster
Vehicle propelled by ejection of gases
{m}}v_{e}^{2}}{\eta _{combustion}P_{chem}}}} 100% efficiency within the engine (engine efficiency η c = 100 % {\displaystyle \eta _{c}=100\%} ) would
Rocket
Thermodynamic cycle
Atkinson-cycle engine is a type of internal combustion engine invented by James Atkinson in 1882. The Atkinson cycle is designed to provide efficiency at the
Atkinson_cycle
Distance traveled by a vehicle compared to volume of fuel consumed
Conversions of units: While the thermal efficiency (mechanical output to chemical energy in fuel) of petroleum engines has increased since the beginning of
Fuel_economy_in_automobiles
Closed-cycle regenerative heat engine
heat sink, thereby increasing its efficiency. The heat is supplied from the outside, so the hot area of the engine can be warmed with any external heat
Stirling_engine
Airbreathing jet engine designed to provide thrust by driving a fan
consumption. The other penalty relates to trying to improve the thermal efficiency of the engine by increasing pressure ratio and turbine temperature. This causes
Turbofan
Jet engine where combustion takes place in supersonic airflow
a given engine and fuel. This results in tradeoffs between the efficiency of the engine (takeoff fuel weight) and the complexity of the engine (takeoff
Scramjet
Airbreathing jet engine which is typically used in aircraft
developed the concept independently into practical engines during the late 1930s. Turbojets have poor efficiency at low vehicle speeds, which limits their usefulness
Turbojet
Theoretical engine
concept of entropy. The Carnot engine is the most efficient heat engine which is theoretically possible. The efficiency depends only upon the absolute
Carnot_heat_engine
Version of the second law of thermodynamics
limit of heat engine efficiencies, and the equality of this expression is what is called the Carnot efficiency, that is the efficiency of all reversible
Clausius_theorem
Automotive supplement
contributes to a higher temperature in the combustion engine, the decomposition increases engine efficiency and performance, which is directly related to the
Nitrous_oxide_engine
Discussing what form of transport is the most fuel efficient and economical
engine efficiency. Jet-engine efficiency increases at altitude up to the tropopause, the temperature minimum of the atmosphere. Jet engine efficiency
Energy efficiency in transport
Energy_efficiency_in_transport
Machine that converts one or more forms of energy into mechanical energy (of motion)
pressure in the cylinders to improve efficiency, increasing the size of the engine, and increasing the rate at which the engine produces work. The higher forces
Engine
Type of continuous-flow turbine engine
the machine was 750 kW (1,000 hp), and its efficiency is below that of contemporary reciprocating engines. 1920s The practical theory of gas flow through
Gas-turbine_engine
Internal combustion engine powered by gaseous fuel
reduces the efficiency further still. GE Jenbacher's J624 engine from 2013 was the world's first high efficiency methane-fueled 24-cylinder gas engine. When
Gas_engine
Engine series from Toyota
0-litre engine. High speed combustion technologies: Long stroke (stroke/bore ≈ 1.2) Wider angle between the intake and exhaust valve High efficiency intake
Toyota_Dynamic_Force_engine
Event in a steam engine
cylinder at the end of the stroke, this is achieved at the expense of engine efficiency. In this situation the steam will still have considerable pressure
Cutoff_(steam_engine)
Series of turbocharged, direct-injection gasoline engines
larger-displacement (cylinder volume) naturally aspirated engines, while achieving up to 20% better fuel efficiency and 15% fewer greenhouse emissions, according
Ford_EcoBoost_engine
Turbojet engine component
an alternative to a larger, heavier engine. However, it increases fuel consumption and decreases fuel efficiency, which limits its use to short periods
Afterburner
Family of internal combustion engines
develop a completely new engine for the Toyota Tercel, the successor of Toyota's K engine. The goal was to achieve good fuel efficiency and performance as well
Toyota_A_engine
This is because an engine, theoretically, produces double the power when operated twice as fast if combustion (thermal) efficiency and energy loss remain
Formula_One_engines
Reciprocating internal combustion engine
added. Mazda rotary engines have a reputation for being relatively small and powerful at the expense of poor fuel efficiency. The engines became popular with
Mazda_Wankel_engine
Efficiency of incineration in terms of usable heat energy and minimization of emissions
fuel efficiency engine efficiency depending on whether the level of efficiency is determined by the fuel itself or the combustion chamber or engine. "Types
Combustion_efficiency
Exhaust-powered forced-induction device for engines
and greater efficiency at higher engine speeds. The benefit of variable-geometry turbochargers is that the optimum aspect ratio at low engine speeds is
Turbocharger
Effect in internal combustion engines
efficiently. This efficiency and swirling can also reduce the amount of soot production. Squish piston engines are achieved by modifying an engine's head, block
Squish_(piston_engine)
Reciprocating internal combustion engine
The GD engine featured Economy with Superior Thermal Efficient Combustion (ESTEC) technology. Toyota claims they have a maximum thermal efficiency of 44
Toyota_GD_engine
Means of creating force leading to movement
condition. For these airplanes, excess thrust is not as important as high engine efficiency and low fuel usage. Since thrust depends on both the amount of gas
Propulsion
Type of engine
reaction mass. Every engine wastes some energy, but even assuming 100% efficiency, the engine needs energy amounting to 1 2 M V e 2 {\displaystyle {\begin{matrix}{\frac
Reaction_engine
Reciprocating internal combustion engine
torque over the M272. This efficiency improvement led to the various models with this engine being labeled with Blue Efficiency moniker. Retaining most of
Mercedes-Benz_M276_engine
Type of internal combustion engine
the rest of the chamber; ultimately allowing the engine to use a leaner mixture thus improving efficiency while ensuring complete combustion. A higher mechanical
Stratified_charge_engine
introduction for non-specialists. The efficiency of the ideal, or Carnot, engine is surprisingly low. That of real heat engines is worse. Carnot's innovation
Carnot_engine_explanation
Engine family by Ford Motor Company
Clarke to develop a new V8 engine that would surpass Ford's earlier V8s in every meaningful way, from power and efficiency to emissions performance and
Ford_Modular_engine
Computer used for engine control in aerospace engineering
for both piston engines and jet engines. The goal of any engine control system is to allow the engine to perform at maximum efficiency for a given condition
FADEC
Subset of irreversible thermodynamics
{\displaystyle {\sqrt {T_{H}T_{L}}}} so that the efficiency is the Carnot efficiency for an engine working between T H {\displaystyle T_{H}} and T H
Endoreversible_thermodynamics
Measure of the fuel efficiency of internal combustion engines
power-specific fuel consumption, for this reason. BSFC allows the fuel efficiency of different engines to be directly compared. The term "brake" here as in "brake
Brake-specific fuel consumption
Brake-specific_fuel_consumption
Amount of an alternative fuel with equal energy content
engine. The measure of this is engine efficiency, often called thermal efficiency in the case of internal combustion engines. A diesel cycle engine can
Gasoline_gallon_equivalent
NOx reduction technique used in gasoline and diesel engines
a spark-ignition engine, an ancillary benefit of recirculating exhaust gases via an external EGR valve is an increase in efficiency, as charge dilution
Exhaust_gas_recirculation
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
Engine where combustion is pulsed instead of continuous
detonation engine, which involves repeated detonations in the engine, and which can potentially give high compression and reasonably good efficiency. Russian
Pulsejet
carburetor enabled the use of less volatile fuels. Further improvements in engine efficiency were attempted at higher compression ratios, but early attempts were
History_of_gasoline
Reciprocating internal combustion engine
roller-bearing rocker arms are used to help reduce friction and improve engine efficiency, except the secondary intake valve rocker arm does not have a roller-bearing
Honda_F_engine
Series of I6 engines built by American Motors and Chrysler
aimed to improve engine efficiency and power output. The flathead version was reintroduced in 1958, serving as the base economy engine for the newly launched
AMC_straight-6_engine
Reciprocating internal combustion engine
modified-Atkinson cycle to improve thermal efficiency. The 1NR-FE is a compact 1.3-litre inline-four piston engine featuring Stop & Start technology and Dual
Toyota_NR_engine
Reciprocating internal combustion engine
chamber and high compression ratios, improving engine efficiency while reducing emissions. This engine is also equipped with a dual ignition spark plug
Maserati_Nettuno_engine
Mechanism to convert between rotational and reciprocating motion
1968, p50, "Appraising Engine Efficiency" para2 Bourke Engine Documentary, Published 1968, p51, "Important Factors in Engine Design" "Effect of the Ratio
Scotch_yoke
Internal combustion engine designed to run on gasoline
have a thermodynamic efficiency of about 20-30% (approximately half that of some diesel engines). Applications of petrol engines include automobiles,
Petrol_engine
Automobile variable valve timing technology
improved engine efficiency. VVT-i replaces the previous VVT system introduced in 1991 with the five-valve per cylinder 4A-GE "Silver Top" engine found in
VVT-i
Physics of heat, work, and temperature
thermodynamics developed out of a desire to increase the efficiency of early steam engines, particularly through the work of French physicist Sadi Carnot
Thermodynamics
Type of internal combustion engine
the engine's inlet tract, which includes the intake manifold, a small pressure drop occurs as air is drawn in, resulting in a volumetric efficiency of
Naturally_aspirated_engine
Kind of engine made by Nissan
journals, and offset cylinder placement in an attempt for increased efficiency. The MR engine family features 'under stress' manufacture, meaning while the
Nissan_MR_engine
Reciprocating internal combustion engine
increased compared to the EJ engine; previously, the chassis precluded a longer stroke. These changes improve combustion efficiency and allow higher torque
Subaru_FB_engine
Steam engine that is used to power a ship or boat
greatly improved steam engine efficiency and allowed more compact engine arrangements. Successful adaptation of the steam engine to marine applications
Marine_steam_engine
Reciprocating internal combustion engine
material common to open deck engines. For increased cooling efficiency, the 1GR employs water passages between the bores of the engine. There are two such passages
Toyota_GR_engine
Driving using techniques that reduce fuel consumption
when the engine is in standby, efficiency increases when shutting off the engine when the car is stopped. While up to 95% of the efficiency limits at
Energy-efficient_driving
Reciprocating internal combustion engine
essentially unchanged. The resulting engine was somewhat improved as to power and efficiency. The 5.9 L V8 engines followed suit in 1989, but also received
Chrysler_LA_engine
Engine utilising one or more reciprocating pistons
pressure gas above the piston does not leak past it and reduce the efficiency of the engine. This seal is usually provided by one or more piston rings. These
Reciprocating_engine
Type of spacecraft
require huge advances in spacecraft propulsion, energy storage, and engine efficiency which may or may not ever be possible. Nuclear pulse propulsion could
Relativistic_rocket
Diesel engine with a turbocharger
diesel engine equipped with a turbocharger. As with other engine types, turbocharging a diesel engine can significantly increase its efficiency and power
Turbo-diesel
Type of rocket engine
to future defence applications”. They believe the engine with no moving parts can increase efficiency and cost due to the lower complexity, allowing for
Rotating_detonation_engine
American industrial company
original on October 11, 2007. "The Role of a Garrett Turbocharger in Engine Efficiency for Industrial Applications". MCGILL Industries. March 4, 2026. Retrieved
Garrett_Motion
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
Thermodynamic cycle for spark ignition piston engines
temperature. The transfer of energy amounts to an efficiency improvement and the resulting power density of the engine is also improved. The intake air is typically
Otto_cycle
Systems vehicles with multiple power sources use to transmit power to the wheels
more low-engine-speed torque, lower fuel efficiency) is often modified to an Atkinson cycle or Miller cycle (lower power density, less low-engine-speed torque
Hybrid_vehicle_drivetrain
Methods for higher energy efficiency
affect the efficiency of the energy expended. Turbochargers can increase fuel efficiency by allowing a smaller displacement engine. The 'Engine of the year
Efficient_energy_use
Type of propelling nozzle
sea-level operation will quickly lose efficiency at higher altitudes. In a multi-stage design, the second stage rocket engine is primarily designed for use at
Rocket_engine_nozzle
Mazda motor vehicle engine
Mazda to increase fuel efficiency and engine output. The initial announcement of the Skyactiv technologies included new engines, but has grown to include
Skyactiv
Heat engine that performs mechanical work using steam as its working fluid
made by James Watt (1736–1819) greatly increased its efficiency, and in 1781 he adapted a steam engine to drive factory machinery, thus providing a reliable
History_of_the_steam_engine
Highly refined form of kerosene used as rocket fuel
times, combustion efficiencies, and combustion-chamber pressures increased, engine masses decreased, which led to unmanageable engine temperatures. Raw
RP-1
Fuel-based auxiliary power unit that extends the range of a battery electric vehicle
conventional drivetrain where varying speed demands reduce rotary engine efficiency. Mazda deployed a production Wankel range extender in the MX-30 R-EV
Range_extender
gasoline engine. Cummins reduced development time and cost by 10%–15% using KIVA to develop its high-efficiency 2007 ISB 6.7-L diesel engine that was
KIVA_(software)
Type of four-stroke engine
on the same side of the engine block.) Although a sidevalve engine can safely operate at high speed, its volumetric efficiency swiftly deteriorates, so
Flathead_engine
Change in velocity per amount of fuel
types of engines. Specific impulse can be taken as a measure of efficiency. In cars and planes, it typically corresponds with fuel efficiency, i.e. the
Specific_impulse
Aircraft fuel efficiency
transport energy efficiency of aircraft. Fuel efficiency is increased with better aerodynamics and by reducing weight, and with improved engine brake-specific
Fuel_economy_in_aircraft
Regional turboprop airliner
cockpit, and the adoption of newer engine versions to deliver enhanced performance, such as increased efficiency and reliability and reductions in operating
ATR_72
Design parameter of gas turbines
maximum theoretical thermal efficiency in an ideal Brayton cycle engine, a high pressure ratio leads to higher thermal efficiency: η = 1 − ( 1 P R γ − 1 γ
Overall_pressure_ratio
Aircraft gas turbine function
extra electric generation is believed to provide a net improvement in engine efficiency, lower weight, and ease of maintenance. According to Boeing internal
Bleed_air
Valvetrain configuration
valves to increase the volumetric efficiency, so that with the same displacement as an OHV engine, the OHC engine will end up being the physically larger
Overhead_camshaft_engine
American developer of opposed-piston, two-stroke, compression ignition engines
Achates Power, its opposed-piston, two-stroke engine has demonstrated an increase in fuel efficiency with engine-out emissions levels sufficient to meet tailpipe
Achates_Power
ENGINE EFFICIENCY
ENGINE EFFICIENCY
Girl/Female
Latin
Worthy.
Female
Greek
Feminine form of Greek Nêreus, NERINE means "daughter of Nereus" or "sea sprite" or "wet one." It is also the name of a genus of plants native to South Africa but now spread worldwide. It is a bulb plant that produces beautiful pink funnel-shaped flowers in the fall, similar to the Belladonna Lily, though smaller. In use by the English.
Female
Turkish
Feminine form of Turkish Emin, EMINE means "honest, reliable, trustworthy."
Girl/Female
Indian
Lovable
Male
Turkish
Turkish name ENGIN means "vast."
Girl/Female
English
Good elf.
Girl/Female
Teutonic
Intimidating fame.
Female
French
French form of Welsh Enid, ENIDE means "soul."
Boy/Male
American, British, Celtic, English
Noble; White
Female
English
Old French form of Greek HelénÄ“, possibly ELAINE means "torch." In Malory's Morte D'Arthur (Death of Arthur), this is the name of the tragic figure who dies of grief because Sir Lancelot is unable to return her love.Â
Girl/Female
Greek
Rock.
Girl/Female
Greek
Wellborn. Feminine of Eugene.
Surname or Lastname
English (Cumbria)
English (Cumbria) : variant of Irvin.
Female
English
English short form of Latin Angela, ANGIE means "angel, messenger."
Girl/Female
Greek Latin
The sea nymphs.
Boy/Male
Greek American
Well-born. Famous bearer: Prince Eugene of Savoy; American playwright Eugene O'Neill.
Girl/Female
Arthurian Legend American French Greek
In Arthurian legend, Elaine was mother to Sir Lancelot's son Galahad.
Female
French
French form of Roman Latin Leontina, LÉONTINE means "lion-like."
Female
English
Feminine form of Greek Nereus, NERINE means "daughter of Nereus" or "sea sprite" or "wet one." It is also the name of a genus of plants native to South Africa but now spread worldwide. It is a bulb plant that produces beautiful pink funnel-shaped flowers in the fall, similar to the Belladonna Lily, though smaller. In use by the English.
Girl/Female
Anglo Saxon Gaelic
Elfin.
ENGINE EFFICIENCY
ENGINE EFFICIENCY
Boy/Male
Tamil
Gold
Boy/Male
Tamil
The Moon, Dawn, The end of night, Pleasant early morning
Girl/Female
Latin
Belongs to God.
Boy/Male
Indian
Commodities
Boy/Male
Hindu, Indian, Kannada, Telugu
Sri Hari; Siri
Boy/Male
Sikh
Sea, Ocean
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Telugu, Traditional
Lord Vishnu
Girl/Female
Arabic, Bengali, Hindu, Indian, Kannada, Marathi, Muslim, Telugu
Cool Breeze
Boy/Male
African, Finnish, Hindu, Indian, Japanese, Tamil
Autumn; Bright; Short Form of Joakim; Established by God
Girl/Female
Greek
Gods incarnate.
ENGINE EFFICIENCY
ENGINE EFFICIENCY
ENGINE EFFICIENCY
ENGINE EFFICIENCY
ENGINE EFFICIENCY
n.
A contriver; an inventor; a contriver of engines.
a.
Belonging to, or proceeding from, the original stock; native; hence, not counterfeit, spurious, false, or adulterated; authentic; real; natural; true; pure; as, a genuine text; a genuine production; genuine materials.
v. t.
To take the lining out of; hence, to empty; as, to unline one's purse.
v. t.
To lay out or construct, as an engineer; to perform the work of an engineer on; as, to engineer a road.
n.
One who manages as engine, particularly a steam engine; an engine driver.
a.
Andean; as, Andine flora.
a.
Complete in all parts; undivided; undiminished; whole; full and perfect; not deficient; as, the entire control of a business; entire confidence, ignorance.
v. t.
To clothe with, or as with, ermine.
n.
The act or art of managing engines, or artillery.
n.
Engines, in general; instruments of war.
v. t.
To equip with an engine; -- said especially of steam vessels; as, vessels are often built by one firm and engined by another.
v. t.
To assault with an engine.
v. t.
To gain for service; to bring in as associate or aid; to enlist; as, to engage friends to aid in a cause; to engage men for service.
v. t.
To engird.