Skip to main content

Archive

Show more

Introduction of Engine Control Module Function


Introduction of Engine Control Module Function

The engine control module basically controls the intersection of the engine's necessary ingredients to make energy -- fuel, air and spark. That sounds simple, kind of in the same way an engine itself sounds simple if you break it down into really basic terms. But the ECM accomplishes its considerable chore by constantly monitoring a vast network of sensors around the car to ensure conditions are within normal operating range. When something goes wrong, the ECM adjusts conditions or, if it can't, the car won't run properly or at all. When there's a problem, the ECM stores a trouble code so it can be diagnosed by a mechanic (with a scanner specifically designed for that purpose) and triggers the check engine light so the driver knows something's wrong.
Newer engine computer systems also feature lightweight, low-cost memory systems that can be easily accessed by the dealership to fix programming issues and update specifications (kind of like running a system or software update on your computer).

One of the most recent tasks (in the last decade or so, anyway) delegated to the engine computer came about only as automotive companies switched from mechanical throttle control to electronic throttle control. Previously, when your foot made contact with the gas pedal, it was connected to a cable that went directly to the engine so the engine could decide how much fuel to inject, based on whether you caressed the pedal, mashed it to the floor, or most likely, somewhere in between. Now, an electronic sensor at or near the gas pedal sends a signal via electrical wire to the engine management system, which evaluates your throttle contact and then sends a signal to the engine to adjust fuel dosage.

Part of the ECM's start-up procedure is to calibrate the position of the throttle at idle -- in other words, remind itself, and the throttle, how the engine should run when it's not being given any gas. This helps control and prevent an uneven idle. If all the sensors involved don't agree on the right position, the computer will send a signal to the engine and transmission to run in Limp Mode (preventing the driver from achieving high speeds that could get out of hand) and also sends an alert to the instrument cluster. The idea is to allow it to run well enough to get to a repair shop, but not strand you on the side of the road.

The ECM also makes sure the car meets emissions standards, by monitoring and regulating the fuel mixture to ensure the engine isn't running too rich and emitting pollutants beyond the established parameters. And with all those sensors already in place, the ECM is often responsible for managing features like anti-skid brakes, cruise control and theft protection.

That sounds like a lot to keep straight, doesn't it? So, on top of it all, the engine control module, unit, or what have you, runs through a recalibration test every time you turn on the car, just to make sure signals don't get crossed.













Comments

Popular posts from this blog

New Yuchai engine YC6K600-D30 power for diesel generator 50Hz

Silent Cummins 640kw Diesel Generating Sets

Technical data of 800KVA AC diesel generator set The DG Set is skid mounted, directly coupled with Cummins water cooled engine with built in shock absorber for anti vibration. The alternator is Stamford brand with brushless and self excited, with control panel and protection system complete set. Prime power: 640KW/800KVA Standby power:704KW/880KVA Rated voltage: 230/400V Rated current: 1152A Speed/frequency:1500rpm/50Hz ( or 1800rpm/60Hz) Power factory:0.8lag Size: open type genset: 4.2 x1.82x2.25m, silent genset: 6.5 x2.6 x2.78m Net wight: open type genset: 7800kg,   silent genset : 12000kg Technical Data of Diesel Engine Diesel engine brand/model: Chongqing Cummins/ KTA38-G2B( full new) Prime/standby power: 790KW/920KW 4 Stroke Cycle , 60° Vee , 12 Cylinder, Turbocharged &Aftercooled, 1500rpm, 50Hz, bore/stroke: 159/159mm. The Cummins diesel engine is equipped with electronic type governor, over speed shutdown devices to protect against runaway when electronic governor or con...

Guides to Clean VOLVO Diesel Generator Cooling System

VOLVO Engine Cooling System Volvo engine's internal cooling system makes sure the engine works at the right temperature. It is a closed system that must always be filled with a mixture of concentrated coolant and water in order to protect the engine against internal corrosion, cavitation and bursting due to freezing. Coolant of a suitable chemical composition must be used all year round. This also applies in areas where there is never any risk of freezing, to provide the engine of  diesel generator set   with full corrosion protection. The use of anti-corrosion agents alone is not permitted in Volvo Penta engines. Never use water alone as a substitute for coolant. The corrosion protection additives become less effective over time, which means that the coolant must be changed at regular intervals; refer to Maintenance Schedule. The cooling system must be flushed whenever the coolant is changed; Volvo Penta coolants have been prepared to work best ...