Patent ID: 11970966
Assignee: DOLPHIN N2 LIMITED
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 18:
19. A method of operating a split cycle internal combustion engine, the engine comprising:
a combustion cylinder accommodating a combustion piston; and
a compression cylinder accommodating a compression piston and being arranged to receive air and compress the air to provide a compressed working fluid to the combustion cylinder for combustion, the compression cylinder being coupled to a water reservoir;, the method comprising:
receiving an indication of at least one parameter associated with at least one of: (i) the engine, and (ii) a fluid associated therewith, and controlling an amount of water delivered from the reservoir to the compression cylinder based on the indication of the at least one parameter such that during a compression stroke water in the compression cylinder absorbs, via both sensible heat and latent heat, a rise in temperature caused by the compression stroke such that the majority of the water vaporises into its gaseous phase during the compression stoke and a rise in temperature caused by the compression stroke is limited by absorption of heat by the water;
wherein the delivery of the amount of water is controlled such that the amount of water in the compressed working fluid at an end of the compression stroke results in a level of water concentration in the compressed working fluid that is less than a threshold water concentration level; wherein the threshold water concentration level is selected based on a maximum water concentration level in the compressed working fluid for supporting combustion in the combustion cylinder.