Coolant circuit with head and block coolant jackets connected in series

摘要

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.

主权项

1. 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, where the cylinder head coolant jacket is connected in series with 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.