US 8,757,110 B2Granted

Coolant circuit

AssigneeAudi AG

InventorsSteffen Triebe, Dieter Lachner, Stefan Rank, Stephan Adam, Markus Störmer

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Abstract

Coolant circuit, in particular a coolant circuit having a plurality of sub-circuits 1, 2, 3 of an internal combustion engine 11 includes a primary cooling circuit 1 and a heating circuit 2 as well as a coolant delivery pump 5 disposed on a rotary actuator 4, with the rotary actuator 4 having a rotary-slide housing 20 with several ports 8a, 8b, 9a, 9b, 10a through which coolant can flow, and a first and at least one second rotary slide 6 and 7 which are rotatably supported in the rotary-slide housing 20 and have each at least one rotary-slide pass-through opening 8, 9, 10 forming a flow path, wherein the ports 8a, 8b, 9a, 9b, 10a can be brought into at least partial coincidence with the rotary-slide pass-through openings 8, 9, 10 by a rotary motion of the respective rotary slide 6 and/or 7), wherein a first branch 1a of the primary cooling circuit 1 leads from the internal combustion engine 11 via a main radiator 12 to a main radiator port 8b of the first rotary slide and can be controlled by the first rotary slide 6, and that a second branch 1b of the primary cooling circuit 1 leads from an outlet 21 of the coolant delivery pump 5 to the internal combustion engine 11 and can be controlled by the second rotary slide 7.

Claims16

Dependent claims

A coolant circuit of an internal combustion engine, comprising:

a primary cooling circuit having a first branch leading from the internal combustion engine, and a second branch leading to the internal combustion engine;
a main radiator disposed in the first branch;
a rotary actuator;
and
a coolant delivery pump disposed on the rotary actuator and having an outlet fluidly connectable to the internal combustion engine via the second branch,
said rotary actuator including:
a rotary-slide housing,
a first rotary slide having at least one rotary-slide pass-through opening and being supported in the rotary-slide housing for rotation to allow at least partial coincidence of the at least one rotary-slide pass-through opening with a main radiator port of the rotary-slide housing to thereby control a flow of coolant through the first branch from the internal combustion engine via the main radiator to the at least one rotary-slide pass-through opening of the first rotary valve;
and
a second rotary slide having at least one rotary-slide pass-through opening and being supported in the rotary-slide housing for rotation to allow at least partial coincidence with a further port of the rotary-slide housing to thereby control a flow of coolant through to the second branch from the outlet of the coolant delivery pump to the internal combustion engine.

7 more elements

Dependencies are inferred from the claim text.