Study on biodiesel heat transfer through self-temperature limit injector during vehicle cold start

Abstract

A type of self-temperature limit-injector is proposed to reduce the biodiesel consumption and emission in vehicle cold start process. The self-temperature limit-injector is capable of fast raising fuel temperature, which helps improve the quality of diesel spray and its combustion efficiency. A self-temperature limit-injector model is established with consideration of electro-mechanic coupling and fluid-structure interaction. A transient simulation is conducted using dynamic grid technology. The results show that self-temperature limit-injector can effectively raise biodiesel temperature to 350K from 300K in 32 seconds. That is to say, adding self-temperature limit-injector to existing biodiesel combustion system is an environment- friendly solution due to improving atomization and spray quality quickly.