Chevrolet Debuts Nine-Speed Automatic Slated for Malibu, Cruze Diesel, in addition to fresh Equinox


Chevrolet Debuts Nine-Speed Automatic Slated for Malibu, Cruze Diesel, in addition to fresh Equinox

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in which whirring sound you hear can be Henry Ford in addition to Louis Chevrolet revving up in their graves. Why? Because Chevy in addition to Ford are collaborating on automatic-transmission design in addition to development. This kind of has been going on for more than a decade, with the first fruits of This kind of cooperation appearing as the six-speed automatic transaxle currently in wide use throughout Ford in addition to General Motors.

Based on in which trial’s success, the Detroit rivals agreed to yet another program in 2013 covering fresh nine- in addition to 10-speed automatics. Ford already can be producing the jointly developed 10-speed for F-series trucks; the Mustang can be supposed to get This kind of soon, too. Chevrolet’s Camaro ZL1 arrives soon with GM’s edition, followed by eight additional 2018 designs. The nine-speed can be for transverse applications. As Ford led the development of the longitudinal 10-speed, GM Powertrain engineers led the design of the nine-speed. Chevrolet has just introduced the Hydra-Matic 9T50 for the 2017 Cruze diesel, the 2017 Malibu, in addition to the all-fresh 2018 Equinox, with additional applications to follow.

GM/Ford co-developed 9T50 automatic transmission

Competitors enter these sorts of agreements via time to time because designing fresh transmissions can be a labor- in addition to resource-intensive process, in addition to few customers know or care where their transmissions come via. In spending the same time in addition to investment dollars required to engineer one transmission, Ford in addition to GM reaped two fresh state-of-the-art designs. The same parts used by both companies are identified with different Ford in addition to GM part numbers. Even though the hardware can be common, each company writes its own software code to achieve distinctive operating characteristics.

Every maker can be adding gear ratios to improve drivability in addition to fuel efficiency. A sufficiently low gear can be needed to launch the vehicle smartly via a stoplight. Extra gears facilitate snappy acceleration through the full speed range. Then, when the driver lifts off to cruise the interstate, an overdrive gear reduces rpm to hold the engine at a quiet in addition to efficient operating point. Narrowing the space between ratios with more gears minimizes driveline disturbance while increasing the number of shifts. The fresh nine-speed has an overall ratio spread of 7.6 versus the outgoing six-speed’s 6.0.

2018 Chevrolet Equinox

The 9-speed automatic will also be found inside the redesigned 2018 Chevrolet Equinox SUV.

 

Computer-aided design in addition to a few clever touches helped GM Powertrain engineers pack a few planetary gearsets, four stationary brakes, in addition to three rotating clutches into the existing six-speed’s space. The fresh transmission weighs yet another 22 pounds, a fair cost to pay for the expected 2 percent gain in fuel efficiency.

More than 60 patents filed by GM cover innovations such as replacing the two clutches previously used to control reverse in addition to first gears with an individual, more compact device called a selectable one-way clutch. Computer-controlled solenoids manage all shifting functions. A large hydraulic pressure accumulator supports the essential engine stop/start function. The fresh elliptical-cross-section torque converter can be more compact in addition to provides three operating modes: full slippage, partial slippage, in addition to full lockup. Gears are skipped in certain accelerating in addition to coasting conditions to improve smoothness. Automatic downshifts provide engine braking on downgrades.

In manual mode (what GM calls range select), the driver can hold a gear with engine rpm at or near the redline. Final-drive ratios ranging between 2.89:1 in addition to 3.81:1 are available, in addition to This kind of nine-speed can be engineered for four-cylinder, V-6, front-, in addition to all-wheel-drive applications.

The Hydra-Matic 9T50 will be available in 10 designs throughout GM by the end of 2017. While Ford hasn’t yet revealed its plans to implement the nine-speed automatic, rest assured in which This kind of’s not about to lag behind inside the ratio race.

Chevrolet Debuts Nine-Speed Automatic Slated for Malibu, Cruze Diesel, in addition to fresh Equinox

Source: Chevrolet Debuts Nine-Speed Automatic Slated for Malibu, Cruze Diesel, in addition to fresh Equinox

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