High Temperature Diesel Engine Sensors

Goodfellow Ceramic & Glass Division are an award-winning company who supply specialist glass and ceramics for scientific and industrial use. Goodfellow Ceramic & Glass Division aim is to understand your application and then supply the most appropriate materials or components to meet your needs. Our technical staff are qualified in glass technology and materials science and can, therefore, provide impartial advice and full technical support for your projects.

Increasing Efficiency of Diesel Engines

Faced with tough new requirements for vehicle emissions, IMI Vision developed a new system (IMI Vision UDS System) to increase the efficiency of large diesel engines. IMI’s approach to this issue was to inject gaseous ammonia into the exhaust. Not only did this increase efficiency, it also reduced the emissions of nitrous oxides.

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Case Study - Overcoming Premature Component Failure

Whilst this approach dealt with the issue of emissions, the conditions within the system were now leading to failure in some PTFE components. Goodfellow Ceramic & Glass Division was approached to find a solution to the issue of premature component failure. Firstly the types of materials that would be corrosion resistant and electrically insulating in this particularly aggressive environment were assessed. Then sample materials were obtained for life testing in the system.

Development of Diesel Engine Sensors

IMI Vision had several options for the type of sensor to be used and each of these would be manufactured in a different way.

Three prototype designs were considered:

  • Using conventional metal-ceramic bonding technology.
  • Using ceramic components for the high temperature areas of the system and epoxy resin/ceramic components for the cooler areas.
  • Using a new type of chemically resistant coating.

Summary

Prototypes were built to test the techniques, prove the reliability of the materials and ensure the accuracy of the sensors. The preferred design (metallised and brazed components) was then engineered for production use.

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