A DEVICE, A PROCEDURE AND EMPLOYMENT CONCERNING DIESEL ENGINES USING TWO DIFFERENT FUELS AND EMPLOYMENT OF THE DEVICE FOR STARTING SUCH ENGINES

摘要

For a dual-fuel diesel engine (6, 5) that uses diesel oil and gas boil-off from a cryogenic fluid as fuel, the two fuels being introduced to the engine combustion chamber via respective valves, a valve-controlled conduit connection (7) is arranged from a source of inert gas (N2) to the engine's gas valve (22, 23, 24, 25), and a valve-controlled conduit connection is provided from the engine's gas valve to the atmosphere. This arrangement permits a number of auxiliary functions to be performed, beyond that of introducing gas into the cylinder during normal operation. For example, one can obtain rapid evacuation of gas from the conduit system and neutralize the system (rendering it inert) by gas flow through the gas valves and into the engine cylinders (5, 6). The valves (22, 23, 24, 25) can be effectively cooled by flushing them with inert gas. The engine can be turned over using the system, by introducing inert gas. The engine can be started up by a high pressure introduction of inert gas/air. The engine can also be started up using the boil-off gas and a suitable source of ignition.