DENSO Develops Exhaust Gas Temperature Sensor With Improved Temperature Detection Accuracy
- Contributes to cleaner emissions and better fuel efficiency -
"DENSO's improved Exhaust Gas Temperature Sensor is a result of the company's continuous efforts to develop products that enable our customers to reduce emissions and improve fuel economy of diesel systems," said
To improve the sensor's temperature accuracy, DENSO increased the probe length to almost twice that of the conventional product and extended the sensing tip into the exhaust pipe. The company achieved this by developing a vibration-resistant structure with an anti-resonance pipe to support the probe, or sheath pin, at its optimal position. Also, while the temperature of DPF regeneration needs to be controlled under 650 degrees Celsius for the DPF to maintain its capability, the sensor is equipped with a newly developed thermistor, or sensing element, which improves detection accuracy to plus or minus 10 degrees Celsius compared to that of the conventional product of plus or minus 30 degrees Celsius. These two developments improved the sensor's temperature detection accuracy of the most intensely heated part of the DPF, its core.
With the improved temperature detection performance, the new sensor helps regenerate DPFs more efficiently, resulting in cleaner emissions, as well as increased fuel efficiency due to less fuel required in the DPF regeneration process. In addition, because less fuel is needed for DPF regeneration, less fuel is mixed in the engine oil, which helps prevent the engine oil from deteriorating.
"With more stringent emissions regulations and increasing environmental awareness, DENSO expects an increase in requirements to improve diesel exhaust aftertreatment technologies, which also will increase the demand for highly precise and extended exhaust gas temperature sensors," said
In addition, DENSO also expects an increase in gasoline-powered vehicles with turbochargers to meet the demand for higher engine power as downsizing progresses. To help control the turbocharging system's temperature more precisely, the company plans to apply the new vibration-resistant technology to a gasoline exhaust temperature sensor that can withstand heavy vibrations when mounted near the turbocharger.
DENSO Corporation, headquartered in Kariya, Aichi prefecture,
In the Americas, DENSO employs more than 17,000 people with consolidated sales totaling
U.S. dollar amounts have been translated, for convenience only, at the rate of
* The process of recovering the DPF's filtering capability by burning the particulate matter (PM) trapped in the device through catalytic reaction.
SOURCE DENSO Corporation