Hybrid cooling system of an internal combustion engine

摘要

A hybrid cooling system for an engine is provided. The system comprises a block oil cooling circuit, a head coolant cooling circuit, the head and block circuits having a common heat exchanger. The system also includes a flow device in the head cooling circuit for preventing coolant flow in the head cooling circuit at least during a first phase of a warm-up phase of the internal combustion engine, a delivery device in the block cooling circuit which delivers engine oil constantly under pressure through the block cooling circuit to bearing points in a cylinder block and to bearing points in a cylinder head, and a control element arranged in a control line to reduce the delivery capacity of the delivery device through the block cooling circuit at least during the first phase of the warm-up phase. In this way, heat transfer in the common heat exchanger may be substantially prevented.

主权项

1. A coolant system of a vehicle, comprising:
a cylinder head coolant circuit including a first loop controlled by a shut-off valve arranged downstream of a heat exchanger and upstream of a pump, the pump to pump coolant through a head coolant jacket before reaching the heat exchanger, a second loop including a thermostat to control coolant flow from a main cooler to the pump; a cylinder block oil circuit including a control element arranged upstream of a variable oil pump, the heat exchanger arranged downstream of the variable oil pump, the variable oil pump to pump oil through the heat exchanger to a block coolant jacket; and a control system including instructions to:
close the shut-off valve to block flow through the coolant circuit and open the control element to provide a first amount of oil through the oil circuit when a temperature of coolant in a cylinder head jacket is below a first threshold; andclose the thermostat to block coolant flow through the second loop when an inlet coolant temperature is below a third threshold.