Various embodiments include a method for detecting deviations occurring in the valve drive of an internal combustion engine comprising: measuring dynamic pressure oscillations of intake air in an air intake tract of respective internal combustion engine during operation; calculating an inlet valve stroke phase difference and/or an outlet valve stroke phase difference based on the measured dynamic pressure oscillation; calculating a valve stroke phase deviation value with respect to a valve stroke phase reference value based on the calculated phase difference; and calculating a first valve drive deviation value based on the valve stroke phase deviation value.

A generator management system is provided. The generator management system includes a generator and including an engine, a controller communicably coupled and operatively coupled to the generator to control operation of the generator. The controller includes a load sensing circuit structured to receive a load value of the engine, a fuel level sensing circuit structured to receive a fuel level value of a fuel source supplying fuel to the engine, and an evaluation circuit. The evaluation circuit structured to receive the load value of the engine from the load sensing circuit, receive the fuel level value from the fuel level sensing circuit, evaluate the load value and the fuel value to determine a remaining runtime of the generator, and control the generator to selectively supply power to a subset of one or more load sources based on the remaining runtime of the generator and a desired runtime of the generator.

A method to obtain average revolutions per independent unit includes a total number of engine revolutions with an on-board computing device and a current distance value with the on-board computing device and a retrofitted global positioning system unit so that a final value can be calculated by dividing the total number of engine revolutions with the current distance value for a designated time period. The current distance value can be a distance unit or time unit as the final value, which is the average revolutions per independent unit, is displayed with a control panel of a vehicle. The final value provides an accurate conclusion regarding the current condition of an engine in addition to the accuracy mileage of the engine or the engine hours.

A system comprising a refrigeration engine (132) and regulator (250, 350, 450, 550, 650) positioned within a housing (144, 244), the regulator (250, 350, 450, 550, 650) controlling fuel to the engine through a fuel line (354), a lock-off valve connected to the regulator (250, 350, 450, 550, 650) to shut off fuel supply through the regulator (250, 350, 450, 550, 650), a controller operably connected to the lock-off valve and/or the regulator (250, 350, 450, 550, 650), a guide (462, 562) positioned within the housing (144, 244) and proximate to the refrigeration engine (132), the regulator (250, 350, 450, 550, 650), and/or the fuel line (354) to direct gases leaking from the refrigeration engine (132), regulator (250, 350, 450, 550, 650), and/or at least one fuel line (354), and a methane sensor (566, 666A) positioned within the guide (462, 562) to detect the presence of methane within the guide (462, 562) that is directed by the guide (462, 562), the methane sensor (566, 666A) in communication with the controller and configured to transmit a signal to the controller when methane is detected by the methane sensor (566, 666A). The controller performs a safety action when the signal from the methane sensor (566, 666A) is received.

An engine control apparatus and method in which when an injector malfunction is determined based on a difference in variation of angular velocity of a crankshaft between a plurality of cylinders of a vehicle engine, determining whether the injector malfunctions by avoiding the time when the driving torque of an air compressor is applied or at the time when the influence thereof is reduced, thereby preventing the erroneous determination of whether the injector malfunctions from occurring due to the driving torque of the air compressor connected to the vehicle engine.

When a permission condition which is set in advance is satisfied in a state in which a vehicle is stopped by an operation of a brake pedal by the driver, an engine mounted on the vehicle is automatically stopped; and when the engine is automatically stopped, while a vehicle stop maintaining control to generate a braking force capable of maintaining a stop state of the vehicle is operated even when a brake operation is reduced, there is started notification to the occupant of the vehicle about ignition information which indicates that a state of an ignition switch of the vehicle is on when a parking brake is operated.

Methods and systems for predictive emission maintenance of an engine. In one embodiment, a method for predictive emission maintenance of an engine is provided. The method can include a controller obtaining operational status information of the engine upon startup of a transport refrigeration unit (TRU) or a TRU generator set (GenSet). The method also includes the controller predicting engine emission maintenance based on the operational status information. Also, the method includes the controller providing an advanced notification warning based on whether the controller predicts engine emission maintenance.

A control system for a heating system of an exhaust system is provided. The control system includes at least one electric heater disposed within an exhaust fluid flow pathway, and a control device adapted to receive at least one input selected from the group consisting of mass flow rate of an exhaust fluid flow, mass velocity of an exhaust fluid flow, flow temperature upstream of the at least one electric heater, flow temperature downstream of the at least one electric heater, power input to the at least one electric heater, parameters derived from physical characteristics of the heating system, and combinations thereof. The control device is operable to modulate power to the at least one electric heater based on at least one input.

An engine start control device is provided with: a starter relay that is provided between a battery and a starter motor; a start abnormality determining means that determines the occurrence of start abnormality of an engine; and a start control means, which turns on the starter relay, and starts supplying power from the battery to the starter motor in the cases where a start instruction signal is inputted from a start switch, and which turns off the starter relay in the cases where the start abnormality determining means determined the occurrence of start abnormality of the engine.

Systems and methods for wireless control of welding power supplies are disclosed. An example welding power supply includes: a housing comprising a control panel configured to receive inputs from an operator; power conversion circuitry configured to convert input power into output power for a welding operation; and local control circuitry configured to wirelessly receive a control signal from remote control circuitry of a portable electronic device, and to control the welding power supply based on the received control signal; wherein the local control circuitry is configured to set prioritization of control of the welding power supply between the portable electronic device and the control panel of the welding power supply, prevent the control panel from controlling a parameter of the welding power supply when the portable electronic device is prioritized, and prevent the portable electronic device from controlling the parameter when the control panel is prioritized.