Denso has improved the accuracy of its newly developed discharge temperature sensor. This new sensor is located in front of the diesel particulate filter (DPF) and was used to control the temperature of DPF recirculation in order to help reduce harmful emissions. Improve fuel efficiency. The product will be installed on heavy-duty trucks and mid-load diesel vehicles sold in the United States in the fall of 2009, and will also be installed on vehicles sold in Europe and Japan in 2010.
Doug Patton, senior vice president of Denso Engineering's Engineering Department, said that Denso's improved exhaust gas temperature sensor is a result of the company's long-term commitment to research and development products, enabling the company's customers to reduce emissions and improve the fuel economy of the diesel system. Due to the improved precision brought about by the extended detection length, customers will be able to control their diesel aftertreatment systems more accurately, helping to improve emissions and fuel economy.
In order to improve the temperature accuracy of the sensor, Denso will increase the detection length by a factor of two over the conventional product and extend the sensing tip into the exhaust pipe. The company supports this probe by developing a shock-absorbing structure with an anti-resonance tube, or installing a sheath pin at the best position. When the DPF recirculation temperature needs to be controlled to maintain its capacity below 650 degrees, the sensor is equipped with a newly developed thermistor, or sensing element, which can reach ±10 degrees Celsius compared with the detection accuracy of the conventional product ±30 degrees Celsius. These two research and development have greatly improved the temperature detection accuracy of the DPF and its core sensor.
With improved temperature detection performance, the new sensor makes recirculating DPF more efficient and produces cleaner emissions. Because the DPF recirculation process requires less fuel, improves fuel efficiency, less fuel is mixed into the engine oil, Prevent deterioration of engine oil.
Masahiko Miyaki, manager of the engine control system business department of Denso Co., Ltd., said that with more stringent emission regulations and people’s increasing environmental awareness, Denso expects an increase in post-processing technical requirements for improving diesel emissions, which will also increase people’s demand. The need for high accuracy and exhaust gas temperature sensors.
In addition, Denso also expects the increase in petrol-powered vehicles with worm-gear boosters to meet the need for higher engine power to reduce the size of the process. To help more precisely control the temperature of the worm-gear booster system, the company plans to use a new type of anti-vibration technology for a gasoline exhaust temperature sensor that can withstand large vibrations when mounted close to the booster.
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