Patent ID: 8695543
Filing Date: 2014-04-15
Classification: F01P

Abstract:
1. A unit for cooling an internal combustion engine, the unit comprising: a crankcase exchanger configured to allow circulation of a heat transfer fluid for cooling a crankcase; a first pump at an inlet to the crankcase exchanger configured to force heat transfer fluid in a first direction into the inlet of the crankcase exchanger; a main radiator; a second pump downstream from the crankcase exchanger and upstream from the main radiator, the second pump being configured to force heat transfer fluid in a second direction toward an outlet of the crankcase exchanger; an additional radiator; a cooling circuit configured to carry the heat-transfer fluid between the crankcase exchanger and the radiators; and a burnt gases exchanger including a pipe for carrying burnt gases and with a pipe for carrying heat transfer fluid, the burnt gases exchanger configured to carry heat transfer fluid and perform an exchange of heat between burnt gases and the heat transfer fluid, and wherein the cooling circuit is configured to carry heat transfer fluid between the burnt gases exchanger and the main and additional radiators; and an expansion vessel with high fluid inlet connected to an outlet of the crankcase exchanger and a low outlet connected to the pipe for carrying heat transfer fluid at an inlet of the first pump, wherein the main radiator has a surface area for heat exchange that is greater than a surface area for heat exchange of the additional radiator, wherein the cooling circuit comprises actuators and is configured to selectively adopt a series configuration in which the radiators are fluidly connected in series or a parallel configuration in which the radiators are fluidly connected in parallel, and wherein in the parallel configuration a proportion of heat transfer fluid passing through the main radiator and a proportion of fluid passing through the additional radiator are regulated.