What is cruise mode in a car?
Cruise control (sometimes known as speed control or autocruise, or tempomat in some countries) is a system that automatically controls the speed of a motor vehicle. The system is a servomechanism that takes over the throttle of the car to maintain a steady speed as set by the driver.
What is cruise control in Kia?
“Cruise control allows you to maintain a set speed without using the accelerator. Once you’ve selected the speed, you can take your foot off the accelerator and the vehicle will cruise at that speed.”
How does acceleration work in a torque converter?
Acceleration occurs when the driver takes his foot off the brake and steps on the gas pedal. The impeller starts rotating faster, and there is a large difference between the impeller and turbine speed. This creates torque, and the converter produces torque multiplication, which is necessary for acceleration.
How does the amount of torque affect the top speed?
The amount of torque is overall slightly less, and the maximum torque occurs at higher revs. Such an engine develops more top-end power which would give a higher top speed, but its decreased overall torque requires higher revs for the same power output and more gearchanging — a less ‘lazy’ drive.
What should the stall speed of a torque converter be?
Slippage needs to be controlled; otherwise the vehicle might never move. That’s where the stall speed comes in. Let’s say a torque converter has a stall speed of 2,500 RPM.
Why does the torque converter spin faster than the turbine?
Because there is no direct connection in the torque converter, the impeller will always spin faster than the turbine – a factor known as “slippage.” Slippage needs to be controlled; otherwise the vehicle might never move. That’s where the stall speed comes in. Let’s say a torque converter has a stall speed of 2,500 RPM.
When do you use acceleration and deceleration torque?
Acceleration/Deceleration Torque. As opposed to load torque (which is constant), acceleration torque is the required torque to accelerate (or decelerate) an inertial load up to its target speed. It is only present when accelerating (or decelerating) an inertial load. Total Required Torque.
Why do we need a bigger acceleration motor?
That’s because even though immediately starting at the target speed might seem easier, but it results in a lot of acceleration torque, and thus requires a bigger motor. A bigger motor also equals higher cost and bigger footprint, which are not the most desirable for machine designs.
How is the total torque of a motor calculated?
The total required torque is the sum of the load torque and acceleration torque as shown below (with a safety factor to cover for what we don’t know). Mathematically, acceleration torque is made up of load inertia and acceleration rate as shown below. This is the most common equation used to calculate acceleration torque for all types of motors.
How to calculate acceleration torque on a servo?
For manual-tuned servo motors, it can increase to 100:1. After you make a tentative motor selection based on load inertia, find the motor rotor inertia in the specifications, then plug the value for J0 in order to complete the acceleration torque calculation.