PHEV heating modes to provide cabin comfort
First Claim
1. A vehicle comprising:
- an engine;
a coolant loop including an electric heater and a heater core;
a valve configured to selectively direct coolant from the engine to the coolant loop; and
a controller programmed to, in response to a heat demanded from the heater core being greater than a heat capability of the electric heater, operate the valve to direct coolant from the engine to the coolant loop and request the engine to run.
1 Assignment
0 Petitions
Accused Products
Abstract
A vehicle is disclosed that has multiple coolant paths selected by control of a valve. A valve system is configured to direct coolant from an engine to a heat exchanger according to a difference between a temperature associated with the engine and a temperature associated with the heat exchanger. The valve system is also configured to direct coolant from the engine to an electric heater and to, in response to a heat demanded from the heat exchanger being greater than a heat capability of the electric heater, request the engine to run. A method is disclosed for controlling a valve to change from an isolation position in which the valve isolates coolant circulating through an electric heater and the valve from coolant circulating through an engine to a non-isolation position in which the valve directs coolant from the engine to the electric heater.
64 Citations
9 Claims
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1. A vehicle comprising:
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an engine; a coolant loop including an electric heater and a heater core; a valve configured to selectively direct coolant from the engine to the coolant loop; and a controller programmed to, in response to a heat demanded from the heater core being greater than a heat capability of the electric heater, operate the valve to direct coolant from the engine to the coolant loop and request the engine to run. - View Dependent Claims (2, 3, 4)
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5. A vehicle heating system comprising:
a controller programmed to operate a valve to change from an isolation position in which the valve isolates coolant circulating through an electric heater and a heater core from coolant circulating through an engine to a non-isolation position in which the valve directs coolant from the engine to the electric heater and request the engine to run in response to a difference between a heat demanded from the heater core and a heat capability of the electric heater being greater than a threshold. - View Dependent Claims (6, 7, 8, 9)
Specification