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

Claim 17:
18. A split cycle internal combustion engine comprising:
a combustion cylinder accommodating a combustion piston;
a compression cylinder accommodating a compression piston and being arranged to provide compressed fluid to the combustion cylinder, the compression cylinder being coupled to a water reservoir; and
a controller arranged to receive an indication of at least one parameter associated with at least one of: (i) the combustion cylinder, and (ii) a fluid associated therewith and to control an amount of water delivered into the compression cylinder based on the indicated parameter such that:
when the indicated parameter is less than a target value for the parameter, the controller is configured to deliver no water into the compression cylinder; and
when the indicated parameter is equal to or greater than the target value for the parameter, the controller is configured to control the 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 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; and
a water concentration level in the compressed working fluid is below a maximum water concentration level for supporting combustion in the combustion cylinder.