Coolant circuit with head and block coolant jackets connected in series
AssigneeFord Global Technologies, LLC
InventorsBernd Steiner, Jan Mehring, Martin Wirth, Bernd Brinkmann
Life of this patent
Estimating the term…
Abstract
A method to operate a split coolant circuit of a combustion engine wherein a cylinder head coolant jacket and an engine block coolant jacket are provided in series with a pump delivering coolant to an inlet of the cylinder head coolant jacket without being directly connected to an inlet of the engine block coolant jacket. This allows for 100% of the pump flow rate to be delivered to the cylinder head coolant jacket before division of coolant flow occurs for various engine operating conditions.
Claims15
A split coolant circuit of a combustion engine, comprising:
- a cylinder head coolant jacket having an outlet housing into which an exhaust coolant jacket and an inlet coolant jacket of the cylinder head coolant jacket open;
- an engine block coolant jacket;
- a pump delivering coolant to an inlet of the cylinder head coolant jacket without being directly connected to an inlet of the engine block coolant jacket;
- a radiator;
- a control element;
- a heater;
- a block line, without a block control element, arranged directly on the outlet housing and leading to an inlet side of the engine block coolant jacket, coolant conducted in a same flow direction through the engine block coolant jacket as through the cylinder head coolant jacket;
- a block return line opening directly into the control element arranged on an outlet side of the engine block coolant jacket;
- a block shut-off valve arranged in the block return line;
- a heater line which leads to a cabin heater arranged on the control element;
- and
- a heater shut-off valve in a heater return line of the cabin heater.
A method comprising:
- flowing coolant from a pump to an inlet side of a cylinder head coolant jacket with <5% flowing to a turbocharger in a parallel line, without any connection between the pump and an inlet side of a block coolant jacket;
- flowing coolant from the cylinder head coolant jacket to an outlet housing and a control element;
- flowing a first coolant portion from the outlet housing through a block line to the inlet side of the block coolant jacket and then to the control element via a block return line such that coolant is directed in a same flow direction as the cylinder head coolant jacket;
- and
- adjusting a magnitude of the first coolant portion based on an engine temperature via a block shut off valve.
A method comprising:
- flowing coolant from a pump to an engine cylinder head inlet and to a turbocharger, in a parallel with one another,
- flowing coolant from the cylinder head to a cylinder block, said flow being the only coolant flow to the block.
Dependencies are inferred from the claim text.