CPC F01N 3/208 (2013.01) [F01N 11/00 (2013.01); F01N 2240/02 (2013.01); F01N 2550/05 (2013.01); F01N 2610/02 (2013.01); F01N 2610/105 (2013.01); F01N 2610/1486 (2013.01); F01N 2900/12 (2013.01); F01N 2900/1811 (2013.01)] | 8 Claims |
1. A vehicle having a Diesel Exhaust Fluid (DEF) Thawing Apparatus, comprising:
an engine;
an engine control module (ECM) connected to the engine and configured to control the engine; an exhaust system connected to the engine;
an SCR catalytic device connected to the exhaust system;
a Diesel Exhaust Fluid (DEF) injection system connected to the exhaust system upstream of the SCR catalytic device, and further connected to the engine control module;
a DEF tank connected to the DEF injection system;
a coolant loop connected to the engine, the coolant loop having at least one Coolant Control Valve (CCV) connected to a control module, and a coolant to DEF heat exchanger;
a DEF temperature sensor in communication with the DEF tank and connected to the control module to which the CCV is connected;
an ambient temperature sensor connected to the control module to which the CCV and DEF temperature sensor are connected; the control module to which the CCV, the DEF temperature sensor, and the ambient temperature sensor are connected being configured to trigger a CCV stuck open fault when the DEF tank temperature exceeds the ambient temperature by a first threshold amount for a first period of time; wherein
at least one of the first period of time and the first threshold amount is a function of at least one of the ambient temperature and the DEF temperature;
the control module to which the CCV, the DEF temperature sensor, and the ambient temperature sensor are connected being further configured to trigger a CCV stuck open fault when the DEF tank temperature exceeds a second threshold amount for a second period of time;
and to trigger the CCV stuck open fault if the vehicle is moving above a threshold velocity for a third period of time and the ambient temperature is above a threshold ambient temperature; and
a Urea Quality Sensor (UQS) arranged in fluid communication with the DEF tank and connected to the control module.
|