Text by Michael Ferrara // Photos by Joe Singleton Future parts will explore the output side of the system along with configuration and setup considerations. For the first part in this tech series, we will start by covering EMS operational basics before taking a close-up look at the input side of the system. Since you canРІР‚в„ўt fix stupid, getting educated is the only way to get the right EMS solution that does everything you need without spending too much. However, not spending enough and ending up with an EMS that doesnРІР‚в„ўt do enough will be even more costly in the long run if the system must be upgraded. For the rest of us that skip meals to buy performance parts, wasting money on an overkill EMS solution (if it can even be obtained by maxing out all of the credit cards) limits the amount of money available for other upgrades. Just buy the best standalone ECU and sensor package, get a custom motorsports harness, hire the best calibrator for your particular ECU, and $15K-$40K later РІР‚вЂњ call it a day. For those that have tons of disposable income, thatРІР‚в„ўs probably not a major concern. When it comes to selecting the standalone solution for your racecar, itРІР‚в„ўs really easy to spend too much on an Engine Management System (EMS) that does more than you actually need. With these differing amounts of oxygen, the oxygen sensor produces & sends a voltage output to the engineРІР‚в„ўs fuel management system.Р”Р‡urthermore, AC Delco, Bosch, Denso, and Hitachi are some of the leading manufacturers of O2 sensors in the world.O verkill or insufficient. Besides, it compares the amount of oxygen in the exhaust gas against the amount of oxygen in the atmosphere. It provides a lambda value of 1 throughout various engine operating conditions. The oxygen sensor helps to maintain the РІР‚СљIdealРІР‚Сњ air/fuel ratio 14.7:1 or Lambda 1. Similarly, it is also important to run the engine and get better performance.

Oxygen sensor measuring element undergoes РІР‚Сљgas permeationРІР‚Сњ testing during manufacturing.Р”Р‡urthermore, oxygen is very important for the human body.Manufacturers also test the ceramic thimble pressure at 420 bars to ensure integrity.Manufacturers conduct the functional quality test on O2 sensors at 1000РІВРЉ.A double laser-welded sensor body avoids moisture ingress to the sensor element/heater.Additionally, it gives superior contact for even minute voltage/current signals. Manufacturers use gold plated terminals on signal and reference connector pins.It provides better resistance to corrosion and thermal stress. Then, the output from the oxygen sensor will be around 450mV. Normal Mixture РІР‚вЂњ when the mixture level is approximately 14.7:1. This results in less conductivity and smaller voltage output, typically around 100 mV. Lean Mixture РІР‚вЂњ the smaller difference between oxygen levels. Hence, the voltage output is high at around 900mV. This results in high conductivity between the electrodes. Rich Mixture РІР‚вЂњ large difference between atmospheric and exhaust oxygen levels. However, the average voltage of the sensor is ~ 450mV which results in the ideal mixture ratio of 14.7:1. So, the sensor produces a low voltage of 100 mV. A lean mixture has less fuel per part of oxygen. So, the sensor produces a high voltage of around 900mV. Typically, a rich mixture contains more fuel per part of oxygen. The oxygen sensor compares atmospheric oxygen, typically 21% approx., to the amount of oxygen in the exhaust. This depends upon the oxygen level in the exhaust gases. It ranges from as little as 100mV (0.1 volts) up to a maximum of 900mV (0.9 volts). Besides, they have a ceramic electrolyte (Zirconium Dioxide) between them. The sensor contains two porous platinum electrodes. Design:Р”Р‡urthermore, the oxygen sensor consists of a РІР‚Вgalvanic cellРІР‚в„ў battery. Thus, it achieves the ideal air-fuel ratio of 14.7:1. The oxygen sensor helps the EMS to monitor the optimal emission in the exhaust system. It provides optimal engine power, emissions and economy over the entire engine operating range. Bosch O2 sensorР”Р‡urthermore, the engine management system (EMS) is calibrated. Thus, it provides real-time feedback on the mixture composition to the engine management system. The sensor generates a voltage with regards to the amount of oxygen in the exhaust gas.

It is located before the catalytic converter in the exhaust pipe. Besides, the exhaust gas oxygen sensor is also known as the РІР‚Вlambda sensorРІР‚в„ў.

So, to achieve the correct air-fuel ratio manufactures employ oxygen sensors in the exhaust systems. It determines the proper engine performance. Technically, oxygen is very important for an engine.

Ems 8860 o2 sensor