Cooling circuit for an internal combustion engine

A cooling circuit for an internal combustion engine including a cylinder block and a cylinder head block, these blocks each including integrated cooling means in a form of integrated portions of circuit, the cooling circuit also including, at least a first, a second and a third separate recirculation loops for external recirculation or reinjection mounted in parallel and looped on said integrated cooling means and, a circulating pump connected fluidically to the integrated cooling means and to the three recirculation loops, causing a liquid to circulate in said integrated cooling means and in said three recirculation loops;

• wherein said at least three recirculation loops offer at least one common fluid node and wherein a single actuator controls the flow of liquid circulating in said at least three recirculation loops;
• wherein three regulating components are incorporated into a same structural unit to which are fluidically connected to form portions of said at least three recirculation loops, said structural unit also incorporating said at least one common fluid node, wherein a first regulating component of said three regulating components is placed between said at least one common fluid node and a first pipeline forming the first recirculation loop, a second regulating component of said three regulating components is placed between said at least one common fluid node and a second pipeline forming the second recirculation loop, a third regulating component of said three regulating components is placed between said at least one common fluid node and a third pipeline forming the third recirculation loop, and the first and second regulating components are also connected to each other by a portion of a fourth pipeline
• wherein the third regulating component is made in the form of a valve mounted so that it pivots around an axis perpendicular to a longitudinal axis of the third pipeline and said valve connected to an actuating shaft by a device for transmission and transformation of the rotating movement of said actuating shaft.