By Jeff Hartman
ISBN-10: 0760343454
ISBN-13: 9780760343456
Figuring out gas injection and engine administration platforms is the main to extracting better functionality from today’s cars in a secure, trustworthy, and driveable style. Turbochargers, superchargers, nitrous oxide, excessive compression ratios, radical camshafts: all are recognized to make horsepower, yet with out right realizing and regulate of gasoline injection and different digital engine administration structures, those well known power-adders won't ever reside as much as their strength and, at worst, may cause pricey engine harm. Drawing on a wealth of data and event and a historical past of greater than 1,000 journal articles at the topic, engine-control professional Jeff Hartman explains every little thing from the fundamentals of gas injection to the development of complicated undertaking automobiles. Hartman covers the newest advancements in fuel-injection and engine administration know-how utilized by way of either overseas and household brands, together with well known aftermarket structures. No different publication available in the market covers the topic of engine administration structures from as many angles and as comprehensively as this ebook. via his non-stop journal writing, writer Jeff Hartman is often updated with the most recent fuel-injection and engine administration items and structures.
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Additional info for How to Tune and Modify Automotive Engine Management Systems - All New Edition: Upgrade Your Engine to Increase Horsepowe
Example text
In a modern Hall effect sensor, the voltage change occurs in a silicon chip placed at a right angle to a magnetic field. When a magnet moves into close proximity of the Hall effect sensor (or when a moving metal shutter blade uncovers a magnet located near the sensor), the sensor’s output voltage suddenly jumps to full scale. When the magnetic field is removed, the voltage abruptly drops to zero. Additional circuitry conditions the input power that is supplied to the sensor and amplifies the output signal.
VE is essentially the ratio of the actual cylinder filling that occurs at a certain engine rpm and loading compared to the normally aspirated displacement of the engine at standard temperature and pressure. , the weight of air arriving in the cylinders. , injection pulse width) required at a given combination of engine speed and loading. In fact, many engine management systems forsake the VE table and target air/fuel ratios concept entirely (or provide the option to do so) in favor of a fuel table of basic injection pulse width values that when corrected for temperature and pressure precisely reflect cylinder fuel mass (much more on this in the chapters of this book about sensors, actuators, and tuning).
In the case of aftermarket programmable engine management computers designed to manage many different engines of very different configurations, there must be an easy and straightforward method available to get calibration and configuration data into electrically erasable flash memory. ) for configuration and tuning, and this option is still available on a few systems. These days, the user interface on the vast majority of aftermarket programmable EMSs is a Windows PC laptop connected to the ECU with a serial cable that allows the user to customize the EMS data for a large variety of engines.
How to Tune and Modify Automotive Engine Management Systems - All New Edition: Upgrade Your Engine to Increase Horsepowe by Jeff Hartman
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