US 12,442,320 B2
Method and apparatus for mitigating fuel in oil
Samuel Rios, Coventry (GB); and Ben Kisiel, Coventry (GB)
Assigned to JAGUAR LAND ROVER LIMITED, Coventry (GB)
Appl. No. 18/703,419
Filed by JAGUAR LAND ROVER LIMITED, Warwickshire (GB)
PCT Filed Oct. 14, 2022, PCT No. PCT/EP2022/078720
§ 371(c)(1), (2) Date Apr. 22, 2024,
PCT Pub. No. WO2023/072637, PCT Pub. Date May 4, 2023.
Claims priority of application No. 2115310 (GB), filed on Oct. 25, 2021.
Prior Publication US 2025/0243794 A1, Jul. 31, 2025
Int. Cl. F01M 1/16 (2006.01); B60W 50/08 (2020.01); F01M 11/10 (2006.01); F02D 41/06 (2006.01)
CPC F01M 1/16 (2013.01) [B60W 50/082 (2013.01); F01M 11/10 (2013.01); F02D 41/064 (2013.01); F01M 2001/165 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of mitigating fuel in oil in an internal combustion engine of a hybrid electric vehicle, the method comprising: determining an amount of fuel flow into the engine oil during one or more cold start phases of engine operation; determining an amount of fuel flow into the engine oil during one or more enrichment phases of engine operation; determining an amount of fuel evaporated from the engine oil during one or more phases of vehicle operation with the engine on; determining an amount of fuel evaporated from the engine oil during one or more phases of vehicle operation with the engine off; determining a percentage of fuel in the engine oil from the amount of fuel flow into the engine oil and the amount of fuel evaporated from the engine oil; modifying vehicle operation based on the percentage of fuel in the engine oil exceeding a first fuel in oil threshold or a second fuel in oil threshold; and when the percentage of fuel in the engine oil exceeds the first fuel in oil threshold and is less than the second fuel in oil threshold, inhibiting an engine stop unless the vehicle speed is below a first threshold vehicle speed or braking of the vehicle is effected at a vehicle speed below a second threshold vehicle speed.