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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
Combustion chamber capacity ratio
The compression ratio is the ratio between the maximum and minimum volume during the compression stage of the power cycle in a piston or Wankel engine
Compression_ratio
Reciprocating internal combustion engine
engines in both 12-valve and 16-valve versions with a variable compression ratio and variable valve timing developed by Nissan. The KH5T is a 1.5 L (1461 cc)
Nissan_KR_engine
Form of internal combustion
effective compression ratio can be reduced from the geometric ratio by closing the intake valve either very late or very early with variable valve actuation
Homogeneous charge compression ignition
Homogeneous_charge_compression_ignition
Saab engine technology concept
constant, the compression ratio (CR) for a given engine is almost always constant. One exception is the experimental Saab Variable Compression (SVC) engine
Saab Variable Compression engine
Saab_Variable_Compression_engine
homogeneous charge compression ignition (HCCI); variable valve timing; twin variable geometry turbocharging; variable compression ratio; direct fuel injection
DiesOtto
Combustion engine technology
Honda (24%), and FCA (23%). Variable compression ratio. The best known such system was the experimental Saab Variable Compression engine, which used a hinged
Variable_displacement
Machine to increase pressure of gas by reducing its volume
Compression efficiency is then the ratio of temperature rise at theoretical 100 percent (adiabatic) vs. actual (polytropic). Polytropic compression will
Compressor
Type of engine with no crank
free-piston engine, leading to the potentially valuable feature of variable compression ratio. This does, however, also present a control challenge, since the
Free-piston_engine
Thermodynamic cycle
with a variable compression ratio. As inlet manifold pressure goes up (because of the action of the turbocharger) the effective compression ratio in the
Miller_cycle
Compact crossover SUV
decrease of 5 L. For the e-Power model, the system combines the variable compression ratio 1.5-litre VC-Turbo three-cylinder petrol engine with the second-generation
Nissan_X-Trail
Engine in which fuel combusts with an oxidizer
rotary engine Reciprocating engine Stroke Turbocharger Variable displacement / Variable compression ratio "History of Technology: Internal Combustion engines"
Internal_combustion_engine
Type of carbureted engine
glow-plug engines of similar displacement. Variable compression ratio Media related to Carbureted compression ignition model engines at Wikimedia Commons
Carbureted compression ignition model engine
Carbureted_compression_ignition_model_engine
Audio signal processing operation
perceived effect. A limiter is a compressor with a high ratio and, generally, a short attack time. Compression is used to improve performance and clarity in public
Dynamic_range_compression
2017: The 2019 Infiniti QX50 is available with a turbocharged Variable compression ratio engine. 2017: Achates Power shows a maximum brake thermal efficiency
History of the internal combustion engine
History_of_the_internal_combustion_engine
Part of an internal combustion engine or steam engine
Combustion chambers. Cylinder head Engine displacement Combustor Variable compression ratio "Setting Your Squish Clearance". www.nrhsperformance.com. Retrieved
Combustion_chamber
Measure of engine efficiency
current, energy storage, etc. Two-stroke power valve system Variable compression ratio "Volumetric efficiency of an internal combustion engine – x-engineer
Volumetric_efficiency
Automotive transmission technology
A continuously variable transmission (CVT) is an automatic transmission that can change through a continuous range of gear ratios, typically resulting
Continuously variable transmission
Continuously_variable_transmission
Metric used to measure signal quality
published a variant for varying frame delays. Czekanowski distance Data compression ratio Perceptual Evaluation of Video Quality (PEVQ) Structural similarity
Peak_signal-to-noise_ratio
Internal combustion engine designs
its use Dec 25, 1984 4736715 Engine with a six-stroke cycle, variable compression ratio, and constant stroke Apr 12, 1988 4917054 Six-stroke internal
Six-stroke_engine
Standard measure of the performance of an engine or aviation fuel
determined by running the fuel in a test engine at 600 rpm with a variable compression ratio under controlled conditions, and comparing the results with those
Octane_rating
Series of V8 engines built by Chrysler
chamber is a partial hemisphere, a flat-topped piston would yield a low compression ratio unless a very long stroke is used. The piston crown is domed to protrude
Chrysler_Hemi_engine
Compact encoding of digital data
is a variation on LZ optimized for decompression speed and compression ratio, but compression can be slow. In the mid-1980s, following work by Terry Welch
Data_compression
Compact luxury crossover SUV
leather interior upholstery, 2.0-liter inline-four variable compression engine with compression ratio between 8:1 and 14:1), 2016 Los Angeles Auto Show
Infiniti_QX50
Universal lossless data compression algorithm
it both infringed the LZW patent and because gzip produced better compression ratios using the LZ77-based DEFLATE algorithm. The algorithm found wide use
Lempel–Ziv–Welch
Type of turbocharging technology
the edges of the vanes changes, leading to a variable-aspect-ratio system with fewer moving parts. Variable flow turbines are another simplified version
Variable-geometry turbocharger
Variable-geometry_turbocharger
Engine combustion process
engines use glow plugs. "Diesel" model airplane engines have variable compression ratios. Both types depend on special fuels. Some 19th-century or earlier
Diesel_cycle
infanteria (infantry combat vehicle) VCP – Vehicle Check Point VCR – variable compression ratio VCR – Véhicule de Combat à Roues (wheeled combat vehicle) VCR/AT
Glossary of military abbreviations
Glossary_of_military_abbreviations
Video compression method for HDMI and DisplayPort links
standard supports up to a 3∶1 compression ratio (reducing the data stream to 8 bits per pixel) with constant or variable bit rate, RGB or Y′CBCR 4:4:4
Display_Stream_Compression
Methods of compressing data tailored specifically for genomic data
typically the case in genomic sequence data). The compression ratio of currently available genomic data compression tools ranges between 65-fold and 1,200-fold
Compression of genomic sequencing data
Compression_of_genomic_sequencing_data
Fuel made from vegetable oils or animal fats
(2011). "Performance, emission and combustion characteristics of a variable compression ratio engine using methyl esters of waste cooking oil and diesel blends"
Biodiesel
Technique to compress data
not always optimal among all compression methods – it is replaced with arithmetic coding if a better compression ratio is required. In 1951, David A
Huffman_coding
Reduction of image size to save storage and transmission costs
of a compression method often is measured by the peak signal-to-noise ratio. It measures the amount of noise introduced through a lossy compression of the
Image_compression
HTTPS security vulernability
CRIME (Compression Ratio Info-leak Made Easy) is a security vulnerability in HTTPS and SPDY protocols that utilize compression, which can leak the content
CRIME
Topics referred to by the same term
JID and Vince Staples from the album God Does Like Ugly, 2025 Variable compression ratio Video Cassette Recording, an early videocassette recorder system
VCR_(disambiguation)
Describes the general shape and layout of an aircraft wing
viewed from above or below. See also variable geometry types which vary the wing planform during flight. The aspect ratio is the span divided by the mean or
Wing_configuration
Machine for continuous flow gas compression
a design pressure ratio of about 4:1 or 5:1. As with any heat engine, fuel efficiency is strongly related to the compression ratio, so there is very strong
Axial_compressor
Reciprocating internal combustion engine
and is eqontinuously Variable-valve Timing Control). Bore and stroke are 85 mm × 69 mm (3.35 in × 2.72 in), and compression ratio is 9.8:1. It produces
Nissan_VQ_engine
Reciprocating internal combustion engine
cam phasing and variable valve timing system compared to the LLT. Power and torque are up slightly from the LLT. The compression ratio is 11.5:1. The LFX
GM_High_Feature_engine
Internal combustion engine for models
engine. In addition to this, model diesels have variable compression ratios. This variable compression is achieved by a "contra-piston", at the top of
Model_engine
Work done divided by heat provided
loads and with correspondingly higher effective compression ratios. This technique is known as variable displacement. Most petrol (gasoline, Otto cycle)
Engine_efficiency
Inline-four engine
0 cu in (1,246 cc) Bore x Stroke: 73 mm × 74.4 mm (2.87 in × 2.93 in) Compression Ratio: 10.8:1 Power: 78 PS (57 kW; 77 hp) at 5,700 rpm Torque: 110 N⋅m (81 lb⋅ft)
Honda_L_engine
Straight-6 DOHC piston engine
N52 versions include a variable-length intake manifold ("DISA") with three stages instead of one, and the static compression ratio lowered from 10.7:1 to
BMW_N52
Mazda motor vehicle engine
featuring gasoline direct injection and high compression ratios. Engines in the family have a compression ratio of up to 14:1, except in the United States
Skyactiv
Thermodynamic cycle
effective compression ratio is reduced—for the time the air is escaping the cylinder freely rather than being compressed—but the expansion ratio is unchanged
Atkinson_cycle
Reciprocating internal combustion engine
dual-stage intake manifold. The 1JZ-GE is a common version, with a 10:1 compression ratio, weighing 200 kg (440 lb). Output for the early non-turbo, non-VVT-i
Toyota_JZ_engine
Engine series from Toyota
Hydraulic variable valve timing on both intake and exhaust camshafts. Very high compression-moderated Atkinson cycle engine. Longer stroke to bore ratio (under-square
Toyota_Dynamic_Force_engine
Means of compressing an executable file
compress executable code, they often achieve better compression ratio than standard data compression facilities such as gzip, zip or bzip2.[citation needed]
Executable_compression
Reciprocating internal combustion engine
78 mm × 69.5 mm (3.07 in × 2.74 in). It has a 9.5:1 compression ratio and two variants: with variable valve timing (VVT) valvetrain without VVT (Suzuki
Suzuki_M_engine
Type of engine created by Toyota
DOHC 16-valve Bore x Stroke : 80.5 mm × 78.5 mm (3.17 in × 3.09 in) Compression Ratio : 10.2:1 Applications Toyota Auris (ZRE151) (Europe only) Toyota Corolla
Toyota_ZR_engine
Reciprocating internal combustion engine
naturally aspirated and features variable valve timing (VVT). The B4204T is a 1.9 L (1,948 cc) straight-four with a compression ratio of 9.0:1. It is turbocharged
Volvo_Modular_Engine
Computer graphics algorithm
over the space/quality tradeoff inherent in any lossy compression scheme. With ASTC, the ratio between adjacent bit rates is of the order of 25%, making
Adaptive scalable texture compression
Adaptive_scalable_texture_compression
Reciprocating internal combustion engine
the same as the 2.2 L L61. Compression ratio is 10.0:1. Major features that set it apart from the 2.2 L L61 are variable-valve-timing and other cylinder
GM_Ecotec_engine
Reciprocating internal combustion engine
engines use a clean-sheet design and variable valve timing, with the V6 and V8 sharing the same bore/stroke ratio, with the V6 version displacing 2.7 L
Ford_AJD-V6/PSA_DT17
Reciprocating internal combustion engine
74 in × 3.94 in), 2,835 cc (173.0 cu in), swirl combustion chamber Compression ratio 21.0:1, Zexel Distributor type injection pump, 59 kW (80 PS) at 4000 rpm
Mitsubishi_4M4_engine
Series of turbocharged, direct-injection gasoline engines
10.0:1 compression ratio 2018–present Lincoln Navigator 450 hp (336 kW) at 5000 rpm, 510 lb⋅ft (691 N⋅m) at 3500 rpm, 10.0:1 compression ratio 2017–2020
Ford_EcoBoost_engine
Physical model of an aircraft for display, research, or amusement
spark-ignition gasoline operation, carbureted diesel operation and variable compression-ratio engines. Diesels are preferred for endurance and have higher torque
Model_aircraft
Lossless data compression algorithms
probabilistic ensembles). This measure gives a bound on the data compression ratio that can be achieved. It is then shown that there exists finite lossless
LZ77_and_LZ78
Reciprocating internal combustion engine
(280 lb⋅ft) Compression Ratio: 9.7:1 The Barra 190 was released in 2005, and was standard in the BF Falcon and SY Territory. It increased in compression ratio, power
Ford_Barra_engine
Inline-four engine made by Nissan
It has a 76 mm (3.0 in) bore and 88 mm (3.5 in) stroke with 9.5:1 compression ratio. In North America it was used in the 1991-1999 Sentra, and NX models
GA16DE
Files in which the rate of bit transmission is non-constant
Dirac and other video compression formats.[citation needed] Additionally, variable rate encoding is inherent in lossless compression schemes such as FLAC
Variable_bitrate
Airbreathing jet engine designed to provide thrust by driving a fan
LP/IP compression adding a zero-stage to the HP compression improving the compression process, without adding stages (e.g. higher fan hub pressure ratio) all
Turbofan
Low availability of energy resources
electrification systems and new engines such as the Ganz-Mavag locomotive variable compression ratio for vehicles Other responses include the development of unconventional
Energy_crisis
Family of V8 and V6 engines
GM's Oil Life System, Active Fuel Management, and variable valve timing. It has the same compression ratio and power/torque ratings as its predecessor. Applications:
General Motors LS-based small-block engine
General_Motors_LS-based_small-block_engine
Suzuki automobile engine
and multi-port fuel injection with a 9.7:1 compression ratio. Unlike its successor, it did not have variable valve timing. It produces 130 PS (96 kW; 128 hp)
Suzuki_J_engine
Lossless compression algorithm
dictionary compression scheme somewhat similar to the LZ77 algorithm published by Abraham Lempel and Jacob Ziv in 1977 and features a high compression ratio (generally
LZMA
Reciprocating internal combustion engine
and a compression ratio of 10.8:1. The redline is 7,200 rpm. The S50 has an individual throttle body for each cylinder, single-VANOS (variable valve timing
BMW_M50
Type of reciprocating engine
A four-stroke, air-cooled unit, it had seven cylinders and a variable compression ratio, altered by changing the wobble-plate angle and hence the length
Axial_engine
Average uncertainty in variable's states
English; the PPM compression algorithm can achieve a compression ratio of 1.5 bits per character in English text. If a compression scheme is lossless
Entropy_(information_theory)
Kind of engine made by Nissan
MR16DDT are: Twin variable valve timing control (CVTCS on intake and exhaust valves) Turbo-charged and intercooled Compression ratio of 9.5:1 Lightweight
Nissan_MR_engine
Reciprocating internal combustion engine
octane. This engine features Toyota's VVT-i, variable valve timing system on the intake cam and a compression ratio of 10.0:1. Service weight, including fluids
Toyota_GR_engine
Reciprocating internal combustion engine
lower fuel consumption. In 2015, a higher boost and a slightly lower compression ratio (10.5:1) were used to create a DE30LA version for AMG models, and
Mercedes-Benz_M276_engine
Reciprocating internal combustion engine
(81 kW) at 5,500 rpm and 145 Nm at 4,400 rpm without variable valve timing and with a 9.2:1 compression ratio. The B5D was also found in the Autozam AZ-3, a
Mazda_B_engine
Fast data compression and decompression library written in C++ by Google
"Westmere" 2.26 GHz Core i7 processor running in 64-bit mode. The compression ratio is 20–100% lower than gzip. Snappy is widely used in Google projects
Snappy_(compression)
Open-source file archiver
Volumes of dynamically variable sizes, allowing use for backups on removable media such as writable CDs and DVDs Multi-threaded compression Opening EXE files
7-Zip
Family of internal combustion engines
instead of four. It uses Toyota's Variable Valve Timing (VVT) system on the intake cam, an increased compression ratio (10.5:1), and the intake system was
Toyota_A_engine
Reciprocating internal combustion engine
2nd Generation Common Rail Direct Injection (CRDi) Compression ratio - 16.5:1 Turbocharger - Variable Geometry (VG) technology application: Mitsubishi Challenger
Mitsubishi_Astron_engine
Reciprocating internal combustion engine
1.8L version is an inline 4-cylinder engine that carries a 10.5:1 compression ratio; the engine makes 133–138 PS (98–101 kW; 131–136 hp) at 6,000–6,200 rpm
Hyundai_Theta_engine
Reciprocating internal combustion engine
a peak torque output of 270 lb⋅ft (366 N⋅m) at 1,200 rpm, and a compression ratio of 19:1. There were no OEM automotive applications for 6B engines
Cummins_B_Series_engine
Compression method for digital images
file downloads fractal compression becomes more competitive. At common compression ratios, up to about 50:1, fractal compression provides similar results
Fractal_compression
with ECU-controlled variable valve timing for both inlet and exhaust valves, compression ratio: 10.8:1 aspiration plastic variable intake manifold, tubular
List of discontinued Volkswagen Group petrol engines
List_of_discontinued_Volkswagen_Group_petrol_engines
Diesel engine with a turbocharger
followed by passenger cars in the late 1970s. Since the 1990s, the compression ratio of turbo-diesel engines has been dropping. Diesel engines are typically
Turbo-diesel
Refrigeration process
Vapour-compression refrigeration or vapor-compression refrigeration system (VCRS), in which the refrigerant undergoes phase changes, is one of the many
Vapor-compression refrigeration
Vapor-compression_refrigeration
Digital audio format
algorithm with auditory masking that achieved a significant data compression ratio for its time. IEEE's refereed Journal on Selected Areas in Communications
MP3
Reciprocating internal combustion engine
83 mm (3.27 in) Bore — 75 mm (2.95 in) Stroke — 75.4 mm (2.97 in) Compression ratio — 10.5:1 Power — 70 kW (95 PS; 94 hp) at 6000 rpm Torque — 125 N⋅m
Mitsubishi_4A9_engine
Thermodynamic process in which no mass or heat is exchanged with surroundings
a diatomic gas with 5 degrees of freedom, and so γ = 7/5 ); the compression ratio of the engine is 10:1 (that is, the 1 L volume of uncompressed gas
Adiabatic_process
Relationship between two numbers of the same kind
used in technological areas where ratio comparisons are important, such as aspect ratios (imaging), compression ratios (engines or data storage), etc. Weisstein
Ratio
Audio compressor
output transformers, fast attack and release times, and different compression ratios and modes. The 2019 book Innovation in Music states that the 1176
1176_Peak_Limiter
Reciprocating internal combustion engine
ceramic glowplug system. The engines are designed to operate at a lower compression ratio, thus lowering the combustion pressure, allowing the use of an aluminium
Mitsubishi_4N1_engine
Reciprocating internal combustion engine
180 bar (2,600 psi), improving on power and torque. Compression ratio is 16.5:1. For 2012, compression ration is reduced to 16.3:1, and a new intake port
GM_Family_Z_engine
Speed of sound wave through elastic medium
usually travel at different speeds than compression waves, as exhibited in seismology. The speed of compression waves in solids is determined by the medium's
Speed_of_sound
Process of altering the timing of a valve lift event
1920s incorporated variable valve timing gear, mainly to vary the inlet valve timing in connection with higher compression ratios. The Lycoming R-7755
Variable_valve_timing
Reciprocating internal combustion engine
120 N⋅m (89 lb⋅ft), Malaysia Version: 121 N⋅m (89 lb⋅ft) at 4000 rpm Compression Ratio: 11.5:1; Indonesia Euro 4 Version: 10.5:1 Valve Mechanism: 16-valve
Toyota_NR_engine
Reciprocating internal combustion engine
at low rpm Redline: 6,800 rpm Compression: 10.5:1 Valve train : SOHC i-VTEC (belt-driven, intake2, exhaust2) Variable Cylinder Management (VCM) : (3
Honda_J_engine
Reciprocating internal combustion engine
× 90.5 mm (3.86 in × 3.56 in) as the M157 but with a higher 12.6:1 compression ratio. Compared to its predecessor, the M152 features new cylinder heads
Mercedes-Benz_M152_engine
Reciprocating internal combustion engine
in 1994. Bore is 80 mm (3.1 in) and stroke is 66 mm (2.6 in). The compression ratio is 11.0:1. Applications: 1994–1998 E36 320i 1995–1998 E39 520i A 2
BMW_M52
Reciprocating internal combustion engine
technologies, including variable displacement oil pump, double vortex turbocharger, intake and exhaust door timing variable, high compression ratio, lightweight
Mitsubishi_Sirius_engine
Reciprocating internal combustion engine
(bore x stroke): 5.0 L (5,038 cc) (96 mm × 87 mm (3.78 in × 3.43 in)) Compression ratio: 11.5:1 Block material: High pressure die casting aluminum block Cylinder
Hyundai_Tau_engine
Lossless, but memory-consuming, data compression algorithm
space complexity. The experiments showed that Re-Pair achieves high compression ratios and offers good performance for decompression. However, the major
Re-Pair
Small Japanese gasoline engines
12 Valve Displacement: 658.2 cc Bore & stroke: 64.0 mm × 68.2 mm Compression ratio: 11.2:1 Power: 43 kW (58 PS; 57 hp) at 7,300 rpm Torque: 65 N⋅m (48 lb⋅ft)
Honda_S_engine
VARIABLE COMPRESSION-RATIO
VARIABLE COMPRESSION-RATIO
Boy/Male
Hindu, Indian, Marathi, Punjabi, Sikh, Telugu
Compassion
Girl/Female
Tamil
Valuable
Girl/Female
Welsh
Impression.
Girl/Female
Gujarati, Indian, Kannada, Tamil
Compassion
Boy/Male
Tamil
Compassion
Boy/Male
Gujarati, Indian
Compassion
Boy/Male
Hindi
Valuable.
Girl/Female
Indian, Telugu
Compassion
Girl/Female
Gujarati, Hindu, Indian
Valuable
Girl/Female
American, British, English, Latin
Compassion
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
Indian
Compassion.
Girl/Female
Indian
Valuable
Boy/Male
Hindu, Indian
Compassion
Boy/Male
Anglo, British, English
Variable
Girl/Female
African, Indian, Swahili
Compassion
Girl/Female
Arabic
Compassion
Boy/Male
Hawaiian
Valuable.
Girl/Female
Armenian
Valuable.
Boy/Male
Vietnamese
Valuable.
VARIABLE COMPRESSION-RATIO
VARIABLE COMPRESSION-RATIO
Girl/Female
Indian, Kannada
Loved by All
Surname or Lastname
English or Scottish
English or Scottish : probably an altered form of the nickname Frog (see Frogge).
Girl/Female
Italian
Famous bearer: Alcine is mistress of alluring enchantments and sensual pleasures in the Orlando...
Boy/Male
Indian
Leader
Female
Russian
(ГюлиÑтанÑкий) Russian form of Persian Gulistan, GULISTANSKIY means "rose-land."
Surname or Lastname
English
English : nickname from Latin angelus dei, Old French angele ‘angel’ + Dieu ‘God’.
Boy/Male
Indian, Punjabi, Russian, Sikh
Blessed; Power; Peace; Calm
Boy/Male
Norse
A blind son of Odin.
Biblical
falsehood of a song; rejoicing
Girl/Female
Arabic, Muslim
Aim; Goal; Plural of Hadaf; Target
VARIABLE COMPRESSION-RATIO
VARIABLE COMPRESSION-RATIO
VARIABLE COMPRESSION-RATIO
VARIABLE COMPRESSION-RATIO
VARIABLE COMPRESSION-RATIO
n.
An invariable quantity; a constant.
a.
Friendly; kindly; sweet; gracious; as, an amiable temper or mood; amiable ideas.
n.
Arable land; plow land.
n.
That which is variable; that which varies, or is subject to change.
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.
Liable to vary; too susceptible of change; mutable; fickle; unsteady; inconstant; as, the affections of men are variable; passions are variable.
a.
Having value or worth; possessing qualities which are useful and esteemed; precious; costly; as, a valuable horse; valuable land; a valuable cargo.
adv.
In a variable manner.
n.
A sense of heaviness or obstruction in the body or mind; depression; dullness; lassitude; as, an oppression of spirits; an oppression of the lungs.
a.
Compressing, or having power or tendency to compress; as, a compressive force.
n.
The pressure of the type on the paper, or the result of such pressure, as regards its appearance; as, a heavy impression; a clear, or a poor, impression; also, a single copy as the result of printing, or the whole edition printed at a given time.
n.
The act of compressing, or state of being compressed.
a.
Worthy; estimable; deserving esteem; as, a valuable friend; a valuable companion.
a.
Invariable.
n.
A machine for compressing gases; especially, an air compressor.
v. t.
To represent by parable.
n.
An instrument for compressing an artery (esp., the femoral artery) or other part.
a.
Having the capacity of varying or changing; capable of alternation in any manner; changeable; as, variable winds or seasons; a variable quantity.
a.
Arable; tillable.
n.
The act of pressing; compression; oppression.