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Exhaust Gas Pressure Sensor

Exhaust Gas Pressure Sensor - EBP Sensor

The use of the Exhaust Gas Pressure Sensor in today's High Performance diesel engines is due to the advent of the stricter environmental protection measures instituted to reduce harmful pollution levels. 




Eltek EBP (Exhaust Back Pressure) sensor is suitable for measuring the back pressure in exhausted gas systems to protect engine and turbocharger against overpressures and for the regeneration of DPF (Diesel Particulate Filter). Suitable for PC-LD and Truck applications. Chemical resistance is guaranteed by means of approved materials. The sensitive element is a ceramic element capable of detecting relative or absolute pressure, integrating a signal conditioning IC, which is directly assembled on the sensor. All the active and sensing electronic circuits are not in contact with the exhausted gas. The sensor output is ratiometric with the power supply. Calibration procedure, fault conditions management, ESD, and EMI requirements are guaranteed by means of an approved IC according to automotive standards.

Exhaust Gas Recirculation (EGR) Pressure Sensors

What does the Exhaust Gas Recirculation Pressure Sensor / EGR Pressure Sensors do? 

Determine the exact pressure within the EGR system.

How do they work?

EGR pressure sensors measure and compare the ambient air pressure to the positive pressure that should be in a functioning EGR system, verifying proper EGR valve operation.

Where is the Exhaust Gas Pressure Sensor located?

Near the EGR valve in the engine compartment.

What are the Symptoms of Exhaust Gas Pressure Sensor - EBP Sensor failure?

  • Check engine light is illuminated.
  • DTC code shows fault: P0470 or P0471
  • Rough idle
  • Engine hesitation
  • Poor fuel economy
  • Loss of engine power
  • Failed emissions test

What do these Error Codes mean?

  • Error Code P0470 is defined as Exhaust Pressure Sensor Malfunction. This means the sensor in charge of evaluating the exhaust pressure is not working due to a poor electrical connection or backpressure sensor.
  • Error Code P0471: Exhaust Pressure Sensor Range. This can be caused by a fault in the electrical circuit or mechanical failure of the exhaust backpressure sensor. 

 

Sensor body, connector and wiring must be in good condition. Check for bumps, cracks or housing damage. 
Visual inspection can help but it is not enough to determine if the sensor is operating well.
 

FAILURE CAUSES CAN BE:
  • Breaks, pores or cracks in the pipes.

  • Wear signs in the connector or wirings.

  • Damage of the sensing element causing bad pressure readings.

  • Air leakage in the sensor.

  • Wear in the joints between the sensor and the pipes.

MALFUNCTION OF SENSOR CAN CAUSE ANY OF THE FOLLOWING SYMPTOMS:
  • Unnecessary filter regenerations.

  • Power losses if the sensor is not detecting the filter saturation level.

  • Dashboard light for Particulate filter (or preheating in some models) and blinking light for pre-heating.

  • Reduction of filter lifespan due to unnecessary regenerations.

  • Increase in oil consumption.

  • Increase in pollution levels.

Definition; Common Symptoms; Possible Causes; How to Check; How to Fix ... Error Code P0471 takes place when the PCM (powertrain control module, also known ... This can be caused by a fault in the electrical circuit or mechanical failure. ... Faulty exhaust back pressure sensor; Shorted or open exhaust back pressure ...
The requirement for diesel engines is to develop a high-level engine management systems which reduce both PM(Particulate Matter)and NOx. For PM reduction, post-treatment technology using a pressure sensor and a diesel particulate filter (hereinafter referred to as DPF) is necessary. This system burns out the clogged PM at the filter that the pressure sensor detects. The pressure sensor used in the DPF system has to be at an affordable price and to be reliable against corrosion, freezing, moisture and clogged soot in the harsh environment of exhaust gas with high humidity where highly-acid condensation water and the produced soot can intrude.
This paper describes our newly developed pressure sensor that is suitable for the DPF system.
The main features are as follows:
a. Semiconductor type sensor with a simple structure and is less costly.
b. Employing back surface sensing method and gel protection structure to achieve high reliability against corrosion, freezing and clogging by keeping the surface of the sensor chip circuit away from the exhaust gas. The protection gel is highly acid-resistant to stand in such a tough condition, which was newly developed.

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