Toyota K CVT transmission

Toyota K CVT transmission
Overview
ManufacturerAisin
Also calledSuper CVT-i
Production2000 - present

The Toyota K CVT transmission is a series of continuously variable transmissions (CVT) found in many Toyota and Lexus automobiles. The transmissions are manufactured for the company by Aisin, an automotive parts manufacturer that is part of the Toyota Group of companies. A CVT is a type of automatic transmission that can change seamlessly through a continuous range of gear ratios. This contrasts with other transmissions that provide a limited number of gear ratios in fixed steps. The K series uses two pulleys connected by a belt.

K110/K111/K112 series (2000)

K110

The K110 was Toyota's first belt-type CVT and production began in August 2000. Toyota said that the transmission was both fuel-efficient and offered high driving performance. The K110 features a torque converter with a long-travel damper to help achieve quiet operation and improved fuel efficiency.

Applications:

K111

The K111 transmission is an improved version of K110 introduced in July 2004. The K111 adds neutral-gear control and acceleration linear control.

Applications:

K112

The K112 transmission, introduced in October 2005, is a modified version of the K111 that is built to work with higher displacement 2.4L engines.

Applications:

K114

Applications:

K120 "Direct Shift" transmission (2018)

Toyota brands the K120 as the “Direct Shift” CVT and includes a physical first gear (also known as a "launch gear") and nine additional simulated gears, for a total of 10. The launch gear is engaged when the vehicle takes off from being stopped and transitions to the belt drive as the vehicle picks up speed. The benefit of this system is that traditional CVTs tend to have low efficiency in lower gear ratios, creating a moment of sluggishness when starting from a stop.[2] Since the belts in this CVT are handling a narrower band of ratios, belt angles and loads can be reduced, increasing shift speeds and offering a claimed 6% improvement in fuel efficiency.[3] Production began in October 2018.

Applications:

K210 transmission (2002)

Achieve both high fuel efficiency and high powertrain performance through size and weight reductions and are perfect suited for vehicles in the 1.5- to 1.8-liter class. Production began December 2002. Later in February 2003 Toyota achieves fuel efficiency improvements through its Intelligent Idling Stop System developed by adding an electronic oil pump to the K210 belt-type CVT, ensuring excellent startup performance during engine restarts and producing class-leading fuel efficiency.

Applications:

K310/K311/K312/K313 series (2006)

Achieve both high fuel efficiency and high powertrain performance through size and weight reductions and are suitable for vehicles in the 1.5- to 1.8-liter class. Production began in September 2006.

Current applications:

Previous applications:

Toyota Corolla Axio 1.8L ZRE142 (K311)

Low O/D Rev
2.386 0.411 2.505

Final drive:

  • 5.698:1 (when fitted to 1.5L Allion & Premio 1NZ-FE and 1.8L Corolla 2ZR-FE)
  • 5.356:1 (when fitted to 1.8L Allion & Premio 2ZR-FE)

K410/K411/K41 series (2004)

K410

Achieves both high fuel efficiency and high powertrain performance through size and weight reductions. Designed for vehicles with engine displacements between 1- and 1.3-liters. Production began December 2004.

Applications:

Low O/D Rev
2.4 0.43 2.505

Final drive:

  • 5.833:1 (when fitted to 1L 1KR-FE)
  • 5.08:1 (when fitted to 1.3L 1NR-FE)

K41A

A version of the K410 transmission with the differential shifted forward to maximize space the Toyota iQ, a compact city car that was engineered to maximize passenger space, while minimizing exterior length. Production began October 2008.

Applications:

K41B

Created by increasing the capacity of the K41A CVT, for 1.3-liter engines. Production began April 2009.

Applications:

K411

Based on the K410 and adopting a flex-start control mechanism for the first time in a Toyota CVT; Lock-up clutch actively activated during startup to run the engine in the most efficient operating region, thereby improving fuel efficiency. Production began December 2010.

Applications:

  • Several models including Corolla, Auris, Vitz, Vios, Yaris, Corolla Axio and Echo

See also

References

  1. ^ "Toyota CH-R Service Manual - System Description - Continuously Variable Transaxle System".
  2. ^ Zatz, David (2018-03-23). "Toyota's quiet transmission changes". Retrieved 2020-09-17.
  3. ^ "Direct Shift-CVT: A New Type of Continuously Variable Transmission". Toyota Motor Corporation Official Global Website (Press release). 2018-02-26. Retrieved 2020-09-17.
  4. ^ CORPORATION, TOYOTA MOTOR. "Toyota Launches New Noah and Voxy Minivans in Japan | Toyota | Global Newsroom". Toyota Motor Corporation Official Global Website. Retrieved 2023-01-19.
  5. ^ CORPORATION, TOYOTA MOTOR. "Toyota Launches the New Sienta in Japan | Toyota | Global Newsroom". Toyota Motor Corporation Official Global Website. Retrieved 2023-01-19.

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