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Displacement On Demand
Active Fuel Management (formerly known as displacement on demand (DoD)) is a trademarked name for the car, automobile variable displacement technology from General Motors. It allows a V6 or V8 engine to "turn off" half of the cylinders under light-load conditions to improve Fuel economy in automobiles, fuel economy. Estimated performance on United States Environmental Protection Agency, EPA tests shows a 5.5–7.5% improvement in fuel economy. GM's Active Fuel Management technology used a solenoid to deactivate the Tappet, lifters on selected cylinders of a Valvetrain, pushrod V-layout engine. GM used the Active Fuel Management technology on a range of engines including with the GM Small Block Gen IV engine family, first-generation GM EcoTec3 engine family, second-generation GM High-Feature V6 DOHC engine family, and first-generation High-Feature V8 DOHC engine family. Vehicle applications included the 2005 Chevy TrailBlazer EXT, the GMC Envoy XL, Envoy XUV, and Pontiac Grand Pri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Variable Displacement
Variable displacement is an automobile engine technology that allows the engine displacement to change, usually by deactivating cylinders, for improved fuel economy. The technology is primarily used in large multi-cylinder engines. Many automobile manufacturers have adopted this technology as of 2005, although the concept has existed for some time prior to this. Theory of operation Cylinder deactivation is used to reduce the fuel consumption and emissions of an internal combustion engine during light-load operation. In typical light-load driving the driver uses only around 30 percent of an engine’s maximum power. In these conditions, the throttle valve is nearly closed, and the engine needs to work to draw air. This causes an inefficiency known as pumping loss. Some large capacity engines need to be throttled so much at light load that the cylinder pressure at top dead centre is approximately half that of a small 4-cylinder engine. Low cylinder pressure results in lower fuel e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Opel Signum
The Opel Signum is a large front-engine, front-wheel drive, five-passenger, mid-size executive hatchback manufactured and marketed by the German car manufacturer Opel from 2003 to 2008, exclusively over a single generation, derived from the Opel Vectra. Marketed almost exclusively in Europe, a rebadged Signum was marketed in the United Kingdom as the Vauxhall Signum. The Signum used the long wheelbase version of the GM Epsilon platform also used by the Opel Vectra Caravan. As a very large hatchback with a nearly vertical tailgate, its dimensions placed it between traditional large family cars and executive cars. In most markets, it was also priced accordingly (more expensive than the Opel Vectra, but less than e.g. Audi A6). The Opel Signum, like the Renault Vel Satis, was intended to capture a new market segment. General Motors, Opel's then parent, executed a similar concept in North America of a large hatchback with the related 2004 Chevrolet Malibu Maxx, also derived from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Variable Displacement
Variable displacement is an automobile engine technology that allows the engine displacement to change, usually by deactivating cylinders, for improved fuel economy. The technology is primarily used in large multi-cylinder engines. Many automobile manufacturers have adopted this technology as of 2005, although the concept has existed for some time prior to this. Theory of operation Cylinder deactivation is used to reduce the fuel consumption and emissions of an internal combustion engine during light-load operation. In typical light-load driving the driver uses only around 30 percent of an engine’s maximum power. In these conditions, the throttle valve is nearly closed, and the engine needs to work to draw air. This causes an inefficiency known as pumping loss. Some large capacity engines need to be throttled so much at light load that the cylinder pressure at top dead centre is approximately half that of a small 4-cylinder engine. Low cylinder pressure results in lower fuel e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ward's 10 Best Engines
Wards 10 Best Engines is an annual list of the ten "best" automobile engines available in the U.S. market, that are selected by '' Wards AutoWorld'' magazine. The list was started in 1994 for model year 1995, and has been drawn every year since then, published at the end of the preceding year. Engines must be available in regular-production vehicles on sale in the U.S. market no later than the first quarter of the year. Eligibility has also been based on availability in a vehicle below a base price limit, which increased progressively from for the 1995 list up to for the 2020 list; this limit was eliminated for future competitions following the announcement of the 2020 winners. During a 2-month testing period, Wards editors evaluate each engine according to a number of objective and subjective criteria in everyday driving situations – there is no instrumented testing. The selection takes into account power and torque output; noise, vibration, and harshness (NVH) levels; technic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
General Motors LS-based Small-block Engine
The General Motors LS-based small-block engines are a family of V8 and offshoot V6 engines designed and manufactured by the American automotive company General Motors. Introduced in 1997, the family is a continuation of the earlier first- and second-generation Chevrolet small-block engine, of which over 100 million have been produced altogether and is also considered one of the most popular V8 engines ever. The LS family spans the third, fourth, and fifth generations of the small-block engines, with a sixth generation expected to enter production soon. Various small-block V8s were and still are available as crate engines. The "LS" nomenclature originally came from the Regular Production Option (RPO) code LS1, assigned to the first engine in the Gen III engine series. The LS nickname has since been used to refer generally to all Gen III and IV engines, but that practice can be misleading, since not all engine RPO codes in those generations begin with LS. Likewise, although ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fifth-generation Chevrolet Camaro
The fifth-generation Chevrolet Camaro is a pony car that was manufactured by American automobile manufacturer Chevrolet from 2010 to 2015 model years. It is the fifth distinct generation of the muscle/pony car to be produced since its original introduction in 1967. Production of the fifth generation model began on March 16, 2009, after several years on hiatus since the previous generation's production ended in 2002 and went on sale to the public in April 2009 for the 2010 model year. Development By spring 2005, the first concept car of the fifth-generation Camaro was in development. Several sketches of both the exterior and interior were drawn and were shown months later to the public. Once sketches were finished, the Camaro was constructed as a clay model which was completed by fall 2005 and was shown to the public at the Detroit auto show in January 2006. Following the development of the Zeta architecture and because of its position as the GM global center of RWD developme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chevrolet Monte Carlo
The Chevrolet Monte Carlo is a two-door coupe that was manufactured and marketed by the Chevrolet division of General Motors. Deriving its name from the Monte Carlo, city in Monaco, the Monte Carlo was marketed as the first personal luxury car of the Chevrolet brand. Introduced for the 1970 model year, the model line was produced across six generations through the 2007 model year, with a hiatus from 1989 until 1994. The Monte Carlo was a variant of the Pontiac Grand Prix throughout its production. From 1970 until 1972, the Monte Carlo rode on the unique "A-Special" platform with the Grand Prix, shifting to the standard A-body intermediate chassis from the 1973 through 1977 model years. For 1978, the Monte Carlo line underwent downsizing, but was still considered a midsized coupe. The rear-wheel drive A-body platform of this generation of Monte Carlo was redesignated as the G-body when GM's front-wheel drive A-body cars were introduced for the 1982 model year. After an abbreviate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chevrolet Impala
The Chevrolet Impala () is a full-size car that was built by Chevrolet for model years 1958 to 1985, 1994 to 1996, and 2000 to 2020. The Impala was Chevrolet's popular flagship passenger car and was among the better-selling American-made automobiles in the United States. For its debut in 1958, the Impala was distinguished from other models by its symmetrical triple taillights. The Chevrolet Caprice was introduced as a top-line Impala Sport Sedan for model year 1965, later becoming a separate series positioned above the Impala in 1966, which, in turn, remained above the Chevrolet Bel Air and the Chevrolet Biscayne. The Impala continued as Chevrolet's most popular full-sized model through the mid-1980s. Between 1994 and 1996, the Impala was revised as a 5.7-liter V8–powered version of the Chevrolet Caprice Classic sedan. In 2000, the Impala was reintroduced again as a mainstream front-wheel drive car.The editors of ''Consumer Guide'' In February 2014, the 2014 Impala ran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GM High Value Engine
The High Value engine family from General Motors is a group of cam-in-block or overhead valve V6 engines. These engines feature cast iron blocks and aluminum heads, and use the same 60° vee bank as the 60° V6 family they are based on, but the new bore required offsetting the bores by away from the engine center line. These engines (aside from the LX9) are the first cam-in-block engines to implement variable valve timing, and won the 2006 Breakthrough Award from ''Popular Mechanics'' for this innovation. For the 2007 model year, the 3900 engine featured optional displacement on demand or "Active Fuel Management" which deactivates a bank of cylinders under light load to increase highway fuel economy. It was rumored that GM would produce a 3-valve design, but that never came to be. These engines were produced primarily at the GM factory in Tonawanda, New York, and at the Ramos Arizpe engine plant in Mexico. The assembly line for this engine was manufactured by Hirata Corporatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GM Small-block Engine
The General Motors LS-based small-block engines are a family of V8 and offshoot V6 engines designed and manufactured by the American automotive company General Motors. Introduced in 1997, the family is a continuation of the earlier first- and second-generation Chevrolet small-block engine, of which over 100 million have been produced altogether and is also considered one of the most popular V8 engines ever. The LS family spans the third, fourth, and fifth generations of the small-block engines, with a sixth generation expected to enter production soon. Various small-block V8s were and still are available as crate engines. The "LS" nomenclature originally came from the Regular Production Option (RPO) code LS1, assigned to the first engine in the Gen III engine series. The LS nickname has since been used to refer generally to all Gen III and IV engines, but that practice can be misleading, since not all engine RPO codes in those generations begin with LS. Likewise, although ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chevrolet TrailBlazer
The Chevrolet Trailblazer is an automobile nameplate used by General Motors for its Chevrolet Chevrolet ( ) is an American automobile division of the manufacturer General Motors (GM). In North America, Chevrolet produces and sells a wide range of vehicles, from subcompact automobiles to medium-duty commercial trucks. Due to the promi ... brand since 1999 for several SUV models: * TrailBlazer, a name of appearance package for the Chevrolet S-10 Blazer used between 1999 and 2002 * Chevrolet Trailblazer, a mid-size SUV produced since 2001 as the successor to the S-10 Blazer * Chevrolet Trailblazer, a subcompact crossover produced since 2020 File:99-02 Chevrolet Blazer TrailBlazer.jpg, 1999–2002 Chevrolet S-10 Blazer with TrailBlazer appearance package File:Chevrolet Trailblazer LTZ 2.8 TD 4x4 2019.jpg, 2019 Chevrolet Trailblazer (SUV) File:2021 Chevrolet TrailBlazer RS AWD, front 7.11.20.jpg, 2021 Chevrolet Trailblazer (crossover) See also * Chevrolet Blazer { ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
