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The I-Shift Dual Clutch has two input shafts which are alternatively connected to the engine through two clutches. When driving, the first gear is engaged by one input shaft while the other one pre-selects the next gear. At the actual gear change, the previously engaged clutch is disengaged as the
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The I-Shift has no clutch pedal. It is controlled either by a gearstick mounted on the driver's seat or by buttons on the dashboard, just like a standard automatic gearbox. With the gearstick, the driver can use buttons to manually select gear, although this feature is disabled on some vehicles
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that handles the clutch and shifts. It constantly receives information about vehicle speed, acceleration, weight, road grade, torque demand and more, and can adjust revs and engine brake effect, the main shaft speed plate is responsible for the transmission speed and revs per particular gear in
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In 2016, Volvo launched a new member of the I-Shift family, the I-Shift with
Crawler Gears. The new gears, which are added to the automated transmission, provides exceptional startability for trucks carrying heavy loads and can start from standstill for up to 325 tonnes of GVW.
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The I-Shift with
Crawler Gears adds 1 or 2 Crawler Gears as optional, the first one has a low crawler gear with a 19.38 to 1 ratio and the second one has an ultra low crawler gear with a 32.04 to 1 ratio, they also enable to drive as slowly as 0.5 km/h.
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83:. The standard versions have a gear ratio of 1:1, while the overdrive has a ratio of 0.78:1, suitable for long-distance use. The numbers show maximum torque in hundreds of
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motion in correspondence with the gear file on ECU. The I-Shift uses different software for different type of application.
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The different versions of the I-Shift are named AT (Automatic
Transmission) or ATO, where the O stands for
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idling clutch is engaged at the same time. This results in a
Powershift and seamless transfer of power.
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version of the I-Shift, known as SPO2812, with overdrive and a maximum torque of 2800
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Automated Manual
Transmission Gearbox manufactured by Volvo for Volvo Trucks and Buses
162:"Automatic diagnostic system for I-shift transmission using vibration analysis"
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123:. The dual-clutch version is only available for trucks up to 540 hp.
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and IV, D for Euro V and EEV, and E and F for the Euro VI version.
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241:"Volvo Trucks launches a unique gearbox for heavy vehicles"
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AT2412E, AT2612E, AT2812E, ATO2612E, ATO3112E, ATO3512E
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AT2412D, AT2612D, AT2812D, ATO2612D, ATO3112D, ATO3512D
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100:AT2412C, AT2512C, AT2812C, ATO2512C, ATO3112C
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115:In June 2014, Volvo Trucks presented a new
50:Inside view of a Volvo I-Shift transmission
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220:Volvo Trucks Great Britain & Ireland
190:Volvo Trucks Great Britain & Ireland
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76:(where the gearstick has no buttons).
61:unsynchronised parallel-shaft gearbox
160:Lennartsson, Richard (30 May 2010).
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304:Automatic transmission tradenames
67:, responsible for operating the
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59:Technically the I-Shift is an
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25:automated manual transmission
268:. Volvo Trucks. 16 June 2014
243:. Volvo Trucks. 17 June 2014
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131:I-Shift with Crawler Gears
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65:electronic control unit
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263:"SP2812 - Fact Sheet"
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196:on 18 September 2012
111:I-Shift Dual Clutch
33:Volvo Powertrain AB
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37:Volvo Trucks
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299:Volvo buses
117:dual-clutch
41:Volvo Buses
31:subsidiary
288:Categories
144:References
63:, with an
216:"I-Shift"
186:"I-Shift"
81:overdrive
89:Euro III
272:30 July
247:30 July
225:30 July
200:30 July
170:30 July
55:Design
23:is an
266:(PDF)
165:(PDF)
29:Volvo
274:2015
249:2015
227:2015
202:2015
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39:and
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19:The
121:N·m
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