Basics
Evaporative emissions canister purge
During engine-off conditions, the fuel stored in the fuel system tends to evaporate into the atmosphere. To reduce…
July 16, 2021 · Prabhu TLAuthor: Prabhu TL
Prabhu TL is a SenseCentral contributor covering digital products, entrepreneurship, and scalable online business systems. He focuses on turning ideas into repeatable processes—validation, positioning, marketing, and execution. His writing is known for simple frameworks, clear checklists, and real-world examples. When he’s not writing, he’s usually building new digital assets and experimenting with growth channels.
Basics
Closed-loop ignition timing
The ignition system described in the foregoing section is an open-loop system. The major disadvantage of open loop…
July 16, 2021 · Prabhu TLBasics
Electronic ignition control
An engine must be provided with fuel and air in correct proportions and the means to ignite this…
July 16, 2021 · Prabhu TLBasics
EGR control
A second electronic engine control subsystem is the control of exhaust gas that is recirculated back to the…
July 16, 2021 · Prabhu TLBasics
Idle air control
A block diagram of a simplified idle speed control system is shown in Fig. b. Idle speed is…
July 16, 2021 · Prabhu TLBasics
Idle speed control
Idle speed control is used by some manufacturers to prevent engine stall during idle. The goal is to…
July 16, 2021 · Prabhu TLBasics
Deceleration leaning
During periods of light engine load and high RPM such as during coasting or hard deceleration, the engine…
July 16, 2021 · Prabhu TLBasics
Closed-loop control
Perhaps the most important adjustment to the fuel injector pulse duration comes when the control is in the…
July 16, 2021 · Prabhu TLBasics
Open-loop control
For a warmed-up engine, the controller will operate in an open loop if the closed-loop mode is not…
July 16, 2021 · Prabhu TLBasics
Engine warm-up
While the engine is warming up, an enriched air/fuel ratio is still needed to keep it running smoothly,…
July 16, 2021 · Prabhu TL