Abstract: A Diesel Emissions Fluid (DEF) Thawing arrangement is provided for use with a vehicle having an engine, an Engine Control Module (ECM), an exhaust system, and an SCR catalytic device. A DEF injection system is connected to the exhaust system and to the ECM. A DEF tank is connected to the DEF injection system. An exhaust pipe branch is connected to the exhaust system. A heat exchanging apparatus is connected to the exhaust pipe branch and is configured to exchange heat from exhaust gas within the exhaust pipe branch to the DEF in the DEF tank. The heat exchanging apparatus may be an exhaust gas to DEF heat exchanger located at least partially within the DEF tank, or may be an exhaust gas to coolant heat exchanger connected to an engine coolant circuit and a coolant to DEF heat exchanger located at least partially within the DEF tank.

Abstract: A method for controlling the operation of a valve of a fuel injector. The method may include selecting an electrical current waveform from a plurality of selectable electrical current waveforms. The selected electrical current waveform is provided to the valve, which may be operated to control a characteristic of an injection event, such as, for example, fuel pressure, injection timing, and/or fuel mass, among others. The method further includes detecting an aberrant combustion event from the combustion of the injected fuel. If an aberrant combustion event is detected, the electrical current waveform associated with the injection event may be disabled. Additionally, upon detection of an aberrant combustion event, a value corresponding to the number of detected aberrant combustion events is incremented, which may be used to determine whether or not to continue to disable the selected waveform.