This is also the point at which the combustion of air and fuel is most efficient, resulting in lower exhaust emissions.īecause power is the speed at which energy is converted, more power or higher engine RPM generally means higher fuel consumption, with some exceptions in a vehicle equipped with a CVT. Within this wide range of RPM, maximum torque is achieved at the RPM the engine is able to move the maximum amount of air and fuel in and out of the engine. In simple terms, torque describes how much work an engine can do and horsepower describes how quickly that work can be done.Įngines are designed to work over a wide range of engine speeds (RPM) however the torque and power output do not remain constant. In an engine such as the Subaru Boxer Engine the power from the rotational force of the engine’s crankshaft is calculated as a function of the engine torque and engine speed. Power is the speed at which energy (Gasoline) is converted to mechanical forces necessary to propel the vehicle. The following sections are meant to describe the relationship between an engines power output, gear ratios, and their effect on fuel efficiency. To understand the operating characteristics of a CVT we need to understand why CVTs were developed and what they are designed to accomplish.

The Lineartronic ® CVT has proven so well suited to the SUBARU BOXER engine and Subaru symmetrical full-time All-Wheel Drive, it has replaced most traditional automatic transmissions in the Subaru line-up. As it has no physical gears or fixed gear ratios it provides an advantages in terms of acceleration, smoothness, fuel efficiency and eco-friendliness. A Continuously Variable Transmission (CVT) is an automatic transmission that doesn’t use gears, instead relying on a chain and pulleys to transfer power to the driven wheels.

Cvt transmission reliability