[USA] Toyota Tundra 2022

[J-Gian]

In pratica un ibrido parallelo, con un elettrico tra V6 e cambio a 10 rapporti con convertitore di coppia: nulla a che vedere con il classico PSD Toyota.

Qui l'elettrico serve per garantire coppia a manetta!  

 

 

[...] The electric motor itself produces 48 hp and 184 lb-ft of torque, and the clutch that connects it to the engine is sandwiched inside the motor's rotor. (The need to package a clutch eroded the potential packaging advantage that might have come with a slimmer axial-flux "pancake" motor.) This clutch allows the Tundra's hybrid motor to start and instantly propel the truck after any auto stop/start event, though a traditional starter is also fitted and used for cold starts. The nickel-metal-hybrid battery pack positioned beneath the rear seat cushion has a capacity of 1.9 kWh. That's small, but it's reportedly sufficient enough to provide the assistance Toyota's going for when it comes to acceleration, climbing grades, etc. Anything larger would only support electric-only range, which was not a priority here. [...]

 

Efficiency was of secondary importance in the design of the i-Force Max (we'll eschew the shout-case from here on). The goal instead was to deliver a diesel-like torque curve. This helps explain retaining a torque converter rather than just letting the electric motor handle launches from a stop. The converter provides the smaller motor some torque multiplication when launching the 2022 Tundra with a trailer attached, heading up a steep grade, or overcoming off-road obstacles. Once underway, the torque converter typically locks up, but slipping it a little during transmission shifts makes for smoother acceleration.

 

The Tundra i-Force Max will drive around at low speeds and low loads under electric-only power in its default "Normal" drive mode, and the motor will support light pure-electric cruising at highway speeds. But this is not the rig to get you across some future EVs-only city center. The engine is always on in the Tundra's Tow and Tow+ modes and in its various off-road modes (TRD Pro, sand, mud, etc.) to prevent the potential for a clumsy restart if torque demand suddenly increases. (Note: Mud mode permits the driver to spin the tires fast enough to sling mud from the treads.) [...]

 

Articolo completo su: https://www.motortrend.com/features/2022-toyota-tundra-hybrid-tech-dive

 

 

 

Il cambio a 10 rapporti invece dovrebbe essere questo: https://global.toyota/en/powertrain/transmission/

 

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