| Look up GM, Gm, or gm in Wiktionary, the free dictionary. |
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GM or Gm may refer to:
Companies[edit]
- General Motors, US automobile manufacturing company which was founded in 1908
- Motors Liquidation Company, the US automobile manufacturing company known as General Motors Corporation from 1916 to 2009
- General Mills, US food manufacturing company
- Gunn & Moore, UK sports equipment company
Sports and gaming[edit]
- RGM-79 GM, a mobile suit series in the video game Mobile Suit Gundam
- Gamemaster or game master, a person officiating in a multiplayer role-playing game
Places[edit]
- The Gambia, by ISO 3166 code
- Germany, by FIPS 10-4 country code
- Greater Manchester, England
Science and measurement[edit]
- Geiger–Müller tube or G-M tube, a type of radiation detector
- Genetic modification or Genetically Modified, manipulation of an organism's genome
- Gigametre or gigameter (Gm), one billion metres
- Silty gravel, in the Unified Soil Classification System
- Standard gravitational parameter
- Metacentric height, related to ship stability
- Transconductance, an electronic component parameter
- GM, unit of crosssection named after Maria Goeppert Mayer
Other uses[edit]
- GM chassis or Gusenichnaya Machina, a Russian tracked vehicle chassis
- General MIDI, a standardized specification for music synthesizers
- George Medal, a UK, primarily civil, decoration for acts of great bravery
- Gold master, a version of software to be distributed to customers, i.e. ready for release to manufacturing
- Gunner's mate, a US Navy rating
- G minor, chords and scale
See also[edit]
| Search for 'gm' on Wikipedia. |
- Grace Monroe, the main protagonist in Book Three (and a minor antagonist in Book Two) of the animated anthology series Infinity Train
- GM1, a ganglioside in brain biochemistry
- Gram, a unit of mass, usually abbreviated 'g' rather than 'gm'
| 9G-Tronic | |
|---|---|
| Overview | |
| Manufacturer | Daimler AG |
| Production | 2013–present |
| Body and chassis | |
| Class | 9-speed longitudinalautomatic transmission |
| Chronology | |
| Predecessor | Mercedes-Benz 7G-Tronic transmission |
9G-Tronic is Mercedes-Benz's trademark name for its nine-speed automatic transmission, starting off with the W9A 700 (Wandler-9-Gang-Automatik bis 700 Nm Eingangsdrehmoment; converter-9-gear-automatic with 516 lb-ft maximum input torque; type 725.0) as core model.
Abstract[edit]
In all applications this transmission is identified as the New Automatic Gearbox Generation Three, or NAG3. Initially it debuted on the E 350 blueTEC in 2013,[1][2] before launched in the Mercedes-Benz S-Class (W222). How to download mac os x 10.6 for free. It has been expanded to be used in the Mercedes-Benz C-Class (W205) and the sedan and wagon variants of the Mercedes-Benz E-Class (W213). This transmission was later introduced on Mercedes-Benz M-Class (W166) facelift on the GLE 250 d model. V12 engine models continue to use the older Mercedes-Benz 7G-Tronic transmission. By the end of 2018 unsurpassed ratio span among longitudinalautomatic transmissions for passenger cars.
It is also fabricated by Jatco for use in Nissan and Infiniti vehicles.[3][4]
Specifications[edit]
Basic concept[edit]
Technical and economic progress is reflected in nine forward gears[a] out of ten main components,[b][5] compared to 7 forward gears[c] out of 11 main components[d] in the direct predecessor. It is fully electronic controlled. Torque converter lock-up can operate in all 9 forward gears.
Gear ratios[edit]
| Gear Teeth and Ratios | Planetary Gearset: Teeth | Count | Total | Avg. | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Model Type | First Delivery | Sun 1 Ring 1 | Sun 2 Ring 2 | Sun 3 Ring 3 | Sun 4 Ring 4 | Brakes Clutches | Ratio Span | Gear Step | ||
| Gear | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | R |
| W9A ALL 725.0 | 2013[e][5] | 46 98 | 44 100 | 36 84
| 34 86 | 3 3 | 9.1495 | 1.3188 | ||
| Ratio | 5.5032 | 3.3333 | 2.3148 | 1.6611 | 1.2106 | 1.0000 | 0.8651 | 0.7167 | 0.60148 | - 4.9316 |
| W9A ALL 725.0 | 2016[f][6] | 46 98 | 44 100 | 37 83 | 34 86 | 3 3 | 8.9022 | 1.3143 | ||
| Ratio | 5.35448 | 3.2432 | 2.2523 | 1.6356 | 1.2106 | 1.0000 | 0.8651 | 0.7167 | 0.60148 | - 4.7983 |
Nomogram[edit]
▶️ Interactive Nomogram
This nomogram is a real geometric calculator exactly representing the rotational speeds of the transmission's 3x4 = 12 internal shafts for each of its 9 ratios (+ reverse), grouped according to their 4 permanent coupling on 3 joint ordinates and 5 independent ordinates. These ordinates are positioned on the abscissa in strict accordance with the proportions of the sun gears' teeth numbers relative to those of their rings. Consequently, the output ratios on the 3rd ordinate (carrier of the third planetary gearset) follows closely those of the actual transmission. This advantageous geometric construction sets us free from Willis' famous and tedious formula, because all calculations are exclusively determined by lengths ratios, respectively teeth numbers on the abscissa for the 4 epicyclic ratios, and of rotational speeds on the 3rd ordinate for the 10 gear ratios.
Legend:
A : Brake (blocks s2 sun gear)
B : Brake (blocks r3 ring gear)
C : Brake (blocks c1 carrier gear)
D : Clutch (couples c3 carrier gear with r4 ring gear)
E : Clutch (couples c1 carrier gear with r2 ring gear)
F : Clutch (couples s1 sun gear with c1 carrier gear)
Applications[edit]
Mercedes models[edit]
Mercedes C-Class[edit]
- 2015–2017 Mercedes-Benz W205 (some models)
- 2018–today Mercedes-Benz W205 (all models)
Mercedes E-Class[edit]
- 2014–2016 Mercedes-Benz W212 (E 350 BlueTec only)
- 2016–today Mercedes-Benz W213 (all models)
Mercedes S-Class[edit]
- 2017–today Mercedes-Benz W222 (all except V12 models)
Non Mercedes-Benz models[edit]
- 2021–present Aston Martin DBX
- 2020 Nissan Titan (Jatco JR913E)
See also[edit]
Notes[edit]
- ^plus 1 reverse gear
- ^4 simple planetary gearsets, 3 brakes, 3 clutches
- ^plus 2 reverse gears
- ^4 planetary gearsets (Ravigneaux planetary gearset considered as 2), 4 brakes, 3 clutches
- ^First version with a gear ratio span wider than 9:1 as widest among longitudinal automatic transmissions for passenger cars at that time
- ^Second version introduced without notice with the Mercedes-Benz E-Class (W213) to reduce the step between gear 4 and 5 below the one of the 7G-Tronic (1.3684:1)
References[edit]
- ^'New nine-speed automatic transmission in the Mercedes-Benz E 350 BlueTEC: Premiere of the new 9G-TRONIC - Daimler Global Media Site'. Media.daimler.com. Retrieved 2020-01-16.
- ^'Mercedes-Benz E350 BlueTec gains nine-speed automatic transmission'. Retrieved 22 July 2013.
- ^'Daimler-Renault-Nissan – The alliance in action'.
- ^'Fact Sheet:Press Releases and Project Overview Daimler & Renault-Nissan Alliance'(PDF).
- ^ ab'System description'(PDF). documents.epfl.ch. Retrieved 2020-01-16.
- ^'Der neue Mercedes-Benz SL: Die Legende – jetzt noch dynamischer - Daimler Global Media Site'. Media.daimler.com. Retrieved 2020-01-16.
B And M Transmission Farmersville Ca
External links[edit]
B&m Transmissions Home Page