How are feedforward control systems different from open loop control systems?
There are also feedforward control systems, which are open loop control systems but with an adjustment of the control input function of disturbances. In an open loop control system the input (control action) doesn’t depend on the output of the system.
How does a closed loop control system work?
Closed loop (feedback) system. In a closed loop control system, the input is adjusted function of the output of the system. This means that any disturbances affecting the system will be compensated by the input.
How to set MAF sensor fail frequency to 0?
In the VCM Editor>Edit>Engine Diagnostics>General>MAF Sensor Fail Frequency = 0. This will set a P0103 code and turn on the SES light. Ensure that the P0103 DTC is enabled and you are seeing P0103 in the DTC list.
How does setting up timing affect idle speed?
Setting up your timing like this has a stabilizing effect on the idle. When the idle speed drops, the timing advances, increasing power and moving the idle speed back up. The result is an automatic feedback loop that helps maintain a constant idle speed.
What should my AFR be at full throttle?
Most stock to slightly modified engines will run just fine at an AFR of 14.5:1 and yield better MPG. If you prefer better PERFORMANCE then we suggest to run an AFR of 13.5:1 or even richer to around 13:1. FULL THROTTLE / HIGH RPMS: 12.5 AFR – target with RED mode Driving full out within a gear will bring you into our FULL THROTTLE zone.
What should my AFR be in idle mode?
IDLE / LIGHT CRUISE: 13.5 AFR – target with GREEN mode When you start your vehicle we refer to this as being in IDLE condition. When you shift into gear and drive at a low mph we refer to this as being a LIGHT CRUISE. With 14.7 being the industry standard stoich AFR value, we typically like to see these conditions run slightly richer.
What does the AFR read on a sniper?
Without the engine running, AFR will read 35.6 AFR (Air Fuel Ratio). Once engine is started and closed loop is active, the AFR should read close to the Target AFR in the handheld readouts. If ignition is turned on and the engine is not started, after a period of time, the AFR will start reading “Init…” until the Sniper EFI ECU sees an RPM signal.
What does AFR stand for in four stroke engine?
AFR Values & Characteristics in Four Stroke Engines 6.0 AFR – Rich Burn Limit (engine fully warm) 9.0 AFR – Black Smoke / Low Power 11.5 AFR – Best Rich Torque at Wide Open Throttle 12.2 AFR – Safe Best Power at Wide Open Throttle 13.3 AFR – Lean Best Torque 14.6 AFR – Stoichiometric AFR (Stoich) 15.5 AFR – Lean Cruise 16.5 AFR – Usual Best Economy