HYBRID COOLING SYSTEM OF AN INTERNAL COMBUSTION ENGINE
First Claim
1. A hybrid cooling system for an internal combustion engine, comprising:
- a block cooling circuit through which engine oil flows;
a head cooling circuit through which coolant flows, the head and block circuits having a common heat exchanger;
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 also to bearing points in a cylinder block and also to bearing points in a cylinder head; and
a control element arranged in a control line, which control element reduces the delivery capacity of the delivery device through the block cooling circuit at least during the first phase of the warm-up phase.
1 Assignment
0 Petitions
Accused Products
Abstract
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.
28 Citations
17 Claims
-
1. A hybrid cooling system for an internal combustion engine, comprising:
-
a block cooling circuit through which engine oil flows; a head cooling circuit through which coolant flows, the head and block circuits having a common heat exchanger; 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 also to bearing points in a cylinder block and also to bearing points in a cylinder head; and a control element arranged in a control line, which control element reduces the delivery capacity of the delivery device through the block cooling circuit at least during the first phase of the warm-up phase. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A method for an engine having a block oil circuit, a head coolant circuit, and a common heat exchanger, comprising:
preventing coolant flow in the head circuit at least in a first phase of a warm-up phase of the engine, the warm-up phase including a coolant temperature lower than a first threshold, an oil temperature lower than a second threshold, and a control element of the block circuit being open. - View Dependent Claims (7, 8, 9)
-
10. A coolant system of a vehicle, comprising:
-
a cylinder head coolant circuit including a first loop controlled by 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 cylinder block oil circuit including a control element arranged upstream of 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. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
-
Specification