US 11,808,193 B2
Preventative controls logic for coolant control valve (CCV) stuck open
Navtej Singh, Arlington Heights, IL (US); Paul Boon Charintranond, Palatine, IL (US); and Madelyn Rae Hutton, Lisle, IL (US)
Assigned to International Engine Intellectual Property Company, LLC, Lisle, IL (US)
Filed by International Engine Intellectual Property Company, LLC, Lisle, IL (US)
Filed on Mar. 10, 2022, as Appl. No. 17/692,072.
Prior Publication US 2023/0287823 A1, Sep. 14, 2023
Int. Cl. F01N 3/00 (2006.01); F01N 3/20 (2006.01); F01N 11/00 (2006.01)
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
OG exemplary drawing
 
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.