Can electric lines appear as closed loops?
Electric field lines start (or diverge) from the +ve (positive) charge and terminate (or converge) on negative charge. If the electric field lines form a closed loop, these lines must originate and terminate on the same charge which is not possible because electric field lines always move from positive to negative.
What is Closed Loop?
Closed-loop systems are designed to automatically achieve and maintain the desired output condition by comparing it with the actual condition. In other words, a “closed-loop system” is a fully automatic control system in which its control action being dependent on the output in some way.
What is a closed loop system example?
Two very common examples of closed loop systems people use frequently are temperature control systems (house thermostat) and cruise control systems (in vehicles). Both rely on feedback and a closed-loop system to make automatic adjustments without input from a user, other than creating a set point.
What’s the difference between an open loop and closed loop?
The main difference between an open-loop system and a closed-loop system is that the closed-loop system has the ability to self-correct while the open-loop system doesn’t. Consequently, closed-loop systems are often called feedback control systems while open-loop systems are also known as non-feedback controls.
What is Open Loop vs Closed Loop?
– An open loop control system acts completely on the basis of input and the output has no effect on the control action. – A closed loop control system considers the current output and alters it to the desired condition. The control action in these systems is based on the output. These systems can be easily implemented.
What causes open loop?
Open Loop – Drive, also known as fuel enrichment, occurs during heavy acceleration and WOT. On a two bank vehicle Closed Loop – Fault is when one bank O2 sensor or A/F sensor has a fault. This can be caused by a bad sensor or by one bank being extremely rich or extremely lean.
What are examples of open loop systems?
Open Loop System Applications
- Washing Machine.
- Electric Bulb.
- Electric Hand Drier.
- Time based Bread Toaster.
- Automatic Water Faucet.
- TV Remote Control.
- Electric Clothes Drier.
- Shades or Blinds on a window.
What makes a car Closed Loop?
In a nutshell, closed loop is where the engine operates with a feedback loop. A sensor closes the loop. The sensor in question is a lambda sensor, also known as an oxygen sensor or air/fuel ratio mixture sensor. In closed loop mode, the engine listens to the lambda sensor to adjust fuel/air mixture.
How do I know if my car has a closed loop?
Just use a DVM or a cheap A/F gauge to see if the car is *likely* going into closed loop. A scope/data logger will show you for sure.
What temperature does a car go into closed loop?
Closed loop operation should begin when the the O2 sensor becomes active, engine coolant temperature exceeds 50*C (122*F) for more than 30 seconds and the PCM has seen 1200 RPM or greater for 10 seconds.
How long does a car stay in open loop?
Engine stays in open loop for a few minutes To get faster oxygen sensor readings, car makers added heaters to the sensors. With the heaters, an oxygen sensor can start reporting live readings in just one or two minutes after start up.
When an EFI engine is running in open loop it means?
The 2007 Harley-Davidson EFI systems use close loop mode of operation with a narrow band oxygen sensor for each cylinder. Open Loop operation refers to the time when the ECU is reading the engine sensors and using the internal fuel maps to determine the appropriate amount of fuel to inject into the engine.
What is fuel open loop?
Many modern-day fuel systems offer a new look into system status definitions. This is referred to as ‘open loop’ operation because no input is used from the O2 sensor to regulate the fuel mixture.” Our second definition is “closed loop.” The oxygen sensor at this point is now being used for feedback control.
What is open loop mode?
One type of control system in which the output has no influence or effect on the control action of the input signal is called an Open-loop system. An “open-loop system” is defined by the fact that the output signal or condition is neither measured nor “fed back” for comparison with the input signal or system set point.