![sight control sight control](https://www.erains.net/Uploads/image/20171115/20171115090421_32755.jpg)
The bottom wheel is operated by the controller. The top wheel connects to the gas pedal and the bottom wheel connects to a motor. Above and below the wheel are two other wheels. One common scheme was to have a single wheel that controls the cable to the throttle body.
#Sight control manual
Service manual diagram from AutoZone showing a throttle cable assembly on a Chrysler vehicle. In an older car, the vacuum setting would be in proportion to the difference between the set speed and the desired speed. On newer cars, the throttle is likely operated by an electric motor anyway and a microprocessor determines the throttle position. Some cars only have a single cable to the throttle body and combine input from the cruise control and gas pedal into that one cable.
![sight control sight control](http://2.bp.blogspot.com/-u-qQi-Uz_lo/UPft8PTMk3I/AAAAAAAABJk/V54cF1wuwCg/s1600/SG%2B1.2%2BPanel.png)
You can see a typical controller in the video below. The controller manages the vacuum via a valve that connects to the intake manifold or a dedicated pump along with a valve that bleeds air into the chamber. You could as well use an RC servo, but in practice, it is nearly always a diaphragm or piston that has a vacuum on one side. Of course, the actuator doesn’t have to use vacuum. Since the cables are attached to each other, when the cruise control engages you can feel it in the gas pedal. A valve draws vacuum or admits air into the chamber causing the diaphragm or piston to move the control cable. The other cable does the same thing but instead of a pedal, it is attached to a valve that uses a spring-loaded diaphragm or piston to control the cable - the cruise control servo. One cable goes to your gas pedal and you intuitively know how that works. From Flyball to VacuumĪ classic cruise control-equipped car will often have two cables running to the throttle body. Carmakers and consumers demanded the locking feature and Teetor finally consented. In fact, the original design by Teetor didn’t actually lock the speed in, but just gave resistance to the gas pedal. That was the year power door locks came out, too, and as you can tell, the public liked both of these inventions since we still have them today. Cadillac renamed the device “cruise control” and the name stuck. In 1958, the Chrysler Imperial, New Yorker, and Windsor offered a dash-mounted speed control. That was invented in 1948 and i mproved upon over the next few years.ġ958 Imperial [Lars-Goran, CC-BY-SA 3.0.Frank Riley and Harold Exline had similar inventions in the 1950s, though Teetor’s device won out.
#Sight control driver
Legend has it that he was a passenger in a car with his lawyer driving and grew annoyed that the car would slow down when the driver was talking and speed up when he was listening. The inventor of the modern cruise control was Ralph Teetor, a prolific inventor who lost his sight as a child. The idea was that faster rotation caused the balls would spread out, closing the fuel or air valve while slower speeds would let the balls get closer together and send more fuel or air into the engine. In the early 1900s, flyball governors originally designed for steam engines could maintain a set speed. But how have we had seventy-plus years of driving automation? A Little History A flyball governor from a US Navy training film.Ĭontrolling the speed of an engine is actually not a very new idea. So how did pre-microcontroller cruise control work? Sure, in your modern car it might work just like you think.
![sight control sight control](http://ccwplus.com/assets/images/eoxps2-0grn_2_hr.jpg)
![sight control sight control](https://www.proquip.com.au/wp-content/uploads/2020/04/47297_2-768x768.jpg)
Piece of cake, right? Except cruise control has been around since at least 1948. Monitor the speed and control the gas using a PID algorithm. Imagine if cars didn’t have cruise control and someone asked you if it were possible. It also colors our thinking of what is possible. Modern gadgets often have a screen-based interface that may hide dozens or hundreds of functions that would have been impractical and confusing to do with separate buttons and controls. The advent of the microcontroller changed just about everything.