Speed Controls
Description
Speed control, or cruise control, is the system used to control the speed of a vehicle automatically. Some of the commonly used materials for the construction of speed controls are aluminum, stainless steel, plastic and steel. Speed controls use speedostat to control the speed of a vehicle. In a modern car, the driver manually brings the speed to a particular level and presses a button to set the speed control at the current speed. The speed control takes the signal from the rotating driveshaft or the speedometer cable. A solenoid varies the position of throttle cable to maintain the speed of the car.
Types
Depending on the type of regulator action, speed controls are classified as:
Hydraulic speed controls - Uses hydraulic liquid for absorption of shock and to reduce the motion
Air regulated speed controls - Uses atmospheric air for dampening the speed
Gas regulated speed controls - Uses special gases for speed reduction
Elastomeric speed controls - Uses a synthetic elastomer or rubber to absorb the shock and to dampen the motion
Specifications
The important specifications for speed controls are:
Advantages
The advantages of speed controls in cars are given below:
Provides better fuel efficiency especially during long drives
Helps the drivers to avoid violation of speed limits during a highway journey as well as preventing the situation of getting a speeding ticket
Speed controls are useful in preventing road accidents that are caused by over speeding
Applications
Some of the major applications of speed controls are given below:
Hydraulic speed controls are used in robots, woodworking machinery, drill heads and pneumatic slides
Electronic speed controls are used in race cars for speed control
Speed controls are used to control the speed of loads like moving carriages and machining feeds
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