US 11,719,177 B2
Split cycle engine control
Nick Owen, Sussex (GB); Andrew Atkins, Sussex (GB); and Anoop Selvaraj, Sussex (GB)
Assigned to DOLPHIN N2 LIMITED
Appl. No. 17/433,742
Filed by Dolphin N2 Limited, Sussex (GB)
PCT Filed Feb. 25, 2020, PCT No. PCT/GB2020/050448
§ 371(c)(1), (2) Date Aug. 25, 2021,
PCT Pub. No. WO2020/174228, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 1902593 (GB), filed on Feb. 26, 2019.
Prior Publication US 2022/0154658 A1, May 19, 2022
Int. Cl. F02D 41/40 (2006.01); F02D 41/02 (2006.01); F02D 13/02 (2006.01); F02B 33/22 (2006.01)
CPC F02D 41/021 (2013.01) [F02D 13/0215 (2013.01); F02D 41/401 (2013.01); F02B 33/22 (2013.01); F02D 2200/021 (2013.01); F02D 2200/023 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A split cycle internal combustion engine comprising:
a compression cylinder accommodating a compression piston;
a combustion cylinder accommodating a combustion piston;
a recuperator arranged to exchange heat between exhaust fluid from the combustion cylinder and working fluid being supplied from the compression cylinder to the combustion cylinder via a crossover passage; and
a controller configured to control operation of the engine based on an indication of a temperature of at least one of (i) a material of the recuperator and (ii) the working fluid in the crossover passage;
wherein controlling operation of the engine based on the indication of the temperature comprises: in the event that the indicated temperature exceeds an upper threshold value, controlling operation of the engine to reduce a temperature of the recuperator to reduce an amount of heat-induced damage inflicted on the recuperator.