What is the difference between a NOx sensor and a lambda sensor?
In such cases, the software cancellation of the NOx sensor makes high cost part replacement unnecessary. The Lambda Sensor is located on the exhaust, such as the NOx Sensor, and determines the temperature of the exhausted gas and the amount of unburned fuel and reports it to the ECU.
Are all NOx sensors the same?
Depending on the vehicle’s make and model, the components present can vary. A typical system would comprise a turbocharger, a DPF, and an SCR catalyst – with the NOx sensor sitting upstream from the catalyst. More than one NOx sensor may be present in some vehicles, featuring both an upstream and downstream sensor.
What type of sensor is a NOx sensor?
Overview. Commercial NOx sensors for automotive applications are primarily YSZ electrochemical sensors of the amperometric type. Figure 1 illustrates the basic operating principle. The sensor uses two or three electrochemical cells in adjacent chambers.
What is another name for a lambda sensor?
The lambda sensor, also called an oxygen sensor, is a small probe located on the car exhaust, between the exhaust manifold and the catalytic converter.
Why is oxygen sensor called lambda sensor?
For instance, the oxygen sensor was originally called a Lambda sensor. The Greek letter Lambda is used to describe the voltage range of the sensor when it compares the quantity of oxygen in the exhaust relative to oxygen in the atmosphere.
What causes a NoX sensor not to work?
Common causes of failure include soot buildup on the sensor, ECU water intrusion, and/or damage to the cable, which will cause the check engine light to illuminate. To provide quality and coverage for this important and growing diesel category, we’re proud to introduce a line of Diesel NOx Sensors.
Which is the most common NOx measurement technology?
The most common in-situ NOx measurement technology relies on yttrium-stabilized ZrO 2 (YSZ) electrochemical sensors [984], similar in construction and operating principle to broadband oxygen sensors.
What does NoX sensor 2 on SCR mean?
The second sensor (referred to as NOx sensor 2) measures NOx levels exiting the SCR catalyst. The SCR assembly contains a catalyst brick that requires DEF, or diesel exhaust fluid, for activation.
What is the difference between an oxygen sensor and a lambda sensor?
(more)Loading…. Both Oxygen sensor and Lambda sensor has the same function to do that is to measure the AFR at the exhaust side of the engine and informs the Engine control unit whether the engine is running lean or rich so that necessary actions will be taken by the Engine control unit to maintain the target AFR.
Where are the NOx sensors on a diesel engine?
The assembly uses two NOx sensors: the first sensor (referred to as NOx sensor 1) is located near the turbo downpipe and measures engine out NOx. The second sensor (referred to as NOx sensor 2) measures NOx levels exiting the SCR catalyst.
What kind of sensors are used for NOx adsorber?
Commercial sensors, available from several suppliers, are used for the control of NOx adsorber and SCR aftertreatment. NH 3 sensors have been also developed for use in SCR systems.
The second sensor (referred to as NOx sensor 2) measures NOx levels exiting the SCR catalyst. The SCR assembly contains a catalyst brick that requires DEF, or diesel exhaust fluid, for activation.
The most common in-situ NOx measurement technology relies on yttrium-stabilized ZrO 2 (YSZ) electrochemical sensors [984], similar in construction and operating principle to broadband oxygen sensors.