Investigation of coking diesel injector spray nozzles in operationAslan Apazhev, Yuri Shekikhachev, Vladimir Batyrov, Lyudmila Shekikhacheva and Anzor BolotokovE3S Web Conf., 262 (2021) 01020DOI: https://doi.org/10.1051/e3sconf/202126201020