Research of fuel temperature control in fuel pipeline of diesel engine using positive temperature coefficient material

Abstract

As fuel temperature increases, both its viscosity and surface tension decrease, and this is helpful to improve fuel atomization and then better combustion and emission performances of engine. Based on the self-regulated temperature property of positive temperature coefficient material, this article used a positive temperature coefficient material as electric heating element to heat diesel fuel in fuel pipeline of diesel engine. A kind of BaTiO 3 -based positive temperature coefficient material, with the Curie temperature of 230°C and rated voltage of 24 V, was developed, and its micrograph and element compositions were also analyzed. By the fuel pipeline wrapped in six positive temperature coefficient ceramics, its resistivity-temperature and heating characteristics were tested on a fuel pump bench. The experiments showed that in this installation, the surface temperature of six positive temperature coefficient ceramics rose to the equilibrium temperature only for 100 s at rated voltage. In rated power supply for six positive temperature coefficient ceramics, the temperature of injection fuel improved for 21°C-27°C within 100 s, and then could keep constant. Using positive temperature coefficient material to heat diesel in fuel pipeline of diesel engine, the injection mass per cycle had little change, approximately 0.3%/°C. This study provides a beneficial reference for improving atomization of high-viscosity liquids by employing positive temperature coefficient material without any control methods.

A sandwich-structured intelligent anti-icing/de-icing film with ice-oriented power self-regulating performance

“…Generally the larger f means better temperature self-regulating ability of the PTC heater. But in engineering applications, 35 PTC materials with f above 10 are of practical value for regulating the temperature. From this point of view, it is feasible for both sandwich PTC films and parallel PTC coatings with 50% GP to be applied as temperature self-regulating anti-icing/de-icing techniques.…”

Pengaruh Pemanasan Bahan Bakar Pada Mesin Diesel Terhadap Konsumsi Bahan Bakar Dengan Metode Heat Recovery Jacket Cooler

“…Pemanasan bahan bakar juga bertujuan untuk mempertahankan suhu bahan bakar diesel yang memiliki potensi viskositas tinggi dan untuk mencegah presipitasi (Wei and Geng, 2016), (Li et al, 2016).…”

Properties of Surface Heating Textile for Functional Warm Clothing Based on a Composite Heating Element with a Positive Temperature Coefficient

“…In addition, heat balance between heat generation and dissipation was achieved at high temperatures by reducing heat generation, which allowed for a constant temperature to be maintained [ 13 , 14 , 15 ]. PTC characteristics have proven to be useful in various applications, such as controlling the fuel temperature of automobile engines and defrosting heat pump systems [ 16 , 17 , 18 , 19 ].…”

“…Figure18. Heating temperature of the PTC-SHT according to power consumption before and after washing (inserts: thermal images at an applied voltage of 3 V).…”