System and method for preventing failure of exhaust heat recovery device
AssigneeHyundai Motor Company
InventorsMyung Jun Lee, Jun Yong Lee
Life of this patent
Estimating the term…
Abstract
A system and method for preventing a failure of an exhaust heat recovery device are provided. The method includes operating a sole exhaust heat recovery mode when cooling water has a temperature less than a warm-up reference temperature to introduce all exhaust gas flowing from a DPF into the exhaust heat recovery device where the exhaust gas exchanges heat with the cooling water. Additionally, a passage through which the exhaust gas bypasses the exhaust heat recovery device is opened when the exhaust gas at a rear of the DPF has a temperature greater than the warm-up reference temperature during the sole exhaust heat recovery mode.
Claims10
A method for preventing a failure of an exhaust heat recovery device, comprising:
- operating, by a controller, a sole exhaust heat recovery mode to introduce all exhaust gas flowing from a diesel particulate filter (DPF) into the exhaust heat recovery device where the exhaust gas exchanges heat with the cooling water in response to determining that cooling water has a temperature that is less than a warm-up reference temperature;
- opening, by the controller, a passage through which the exhaust gas bypasses the exhaust heat recovery device in response to determining that the exhaust gas at a rear of the DPF has a temperature that is greater than the warm-up reference temperature during the sole exhaust heat recovery mode;
- determining, by the controller, regeneration of the DPF based on a back pressure of the DPF when the temperature of the exhaust gas at the rear of the DPF is less than a breakdown reference temperature during the sole exhaust heat recovery mode;
- and
- deactivating, by the controller, the sole exhaust heat recovery mode, when the DPF is determined to undergo regeneration and an opening degree of an accelerator position sensor (APS) is greater than an open reference value.
A system for preventing a failure of an exhaust heat recovery device, comprising:
- a memory configured to store program instructions;
- and
- a processor configured to execute the program instructions, the program instructions when executed configured to:
- operate a sole exhaust heat recovery mode to introduce all exhaust gas flowing from a diesel particulate filter (DPF) into the exhaust heat recovery device where the exhaust gas exchanges heat with the cooling water in response to determining that cooling water has a temperature that is less than a warm-up reference temperature;
- open a passage through which the exhaust gas bypasses the exhaust heat recovery device in response to determining that the exhaust gas at a rear of the DPF has a temperature that is greater than the warm-up reference temperature during the sole exhaust heat recovery mode;
- determine regeneration of the DPF based on a back pressure of the DPF when the temperature of the exhaust gas at the rear of the DPF is less than a breakdown reference temperature during the sole exhaust heat recovery mode;
- and
- deactivate the sole exhaust heat recovery mode, when the DPF is determined to undergo regeneration and an opening degree of an accelerator position sensor (APS) is greater than an open reference value.
Dependencies are inferred from the claim text.