A work machine with a remote diagnostic system includes a combustion engine, a pump, a coolant temperature sensor to monitor and transmit a coolant fluid temperature, a pressure sensor coupled to an inlet of the pump, and a controller. The pressure sensor is configured to monitor and transmit a coolant fluid pressure. The controller is operatively associated with the engine, the coolant fluid temperature sensor, the pressure sensor and an equipment care advisor module. The equipment care advisor module is configured to monitor the coolant fluid temperature during a start-up of the work machine, monitor the coolant fluid pressure during the start-up of the work machine, calculate an expected coolant fluid pressure based on the monitored coolant fluid temperature and the monitored coolant fluid pressure, and generate a failure code indicating a combustion gas leak when the monitored coolant fluid pressure exceeds the expected coolant fluid pressure.

When an engine rotation speed is lower than a reference rotation speed, first failure determination in which failure of a flow rate control valve is determined based on a pressure change of cooling water detected by a pressure sensor is executed, when a valve closing instruction to switch the flow rate control valve from an opened state to a closed state is output from a valve control device; and when an engine rotation speed is equal to or higher than the reference rotation speed, second failure determination in which failure of the flow rate control valve is determined based on a pressure change of cooling water detected by a pressure sensor is executed, when a valve opening instruction to switch the flow rate control valve from a closed state to an opened state is output from the valve control device.

A controller for a motor vehicle (1) has an internal combustion engine (3), a transmission (4), and a cooling device (5) with a coolant (5b) for cooling the internal combustion engine (3), wherein the controller (2) is configured to determine a target minimum rotational speed for the internal combustion engine (3) on the basis of the temperature of the internal combustion engine (3) and/or the temperature of the coolant (5b) and to determine a target gear setting on the basis of the target minimum rotational speed.

A control method for a vehicle, provided with an integrated coolant control valve, includes; performing, by a controller, a fault diagnosis of the integrated coolant control valve; determining, by the controller, whether a position sensor is faulty, the position sensor measuring a position of a cam and outputting a corresponding position output when the controller determines that the integrated coolant control valve is faulty; moving the cam for opening and closing a plurality of valves to a maximum position by operating the integrated coolant control valve when the controller determines that the position sensor is faulty; stopping the operation of the integrated coolant control valve by the controller; and limiting a torque output of an engine by the control of the controller according to the position of the cam.

The transparent radiator hose is configured for use with the engine cooling system of a vehicle. The transparent radiator hose diagnoses the interchange of the cooling fluid pumped through the engine cooling system with a system fluid selected from the group consisting of the engine oil, the transmission fluid, and the power steering fluid. The transparent radiator hose comprises a modified radiator hose, a plurality of tracer dyes and an ultraviolet lamp. Each tracer dye is a fluorescent compound. There is a one to one relationship between the plurality of tracer dyes and the group consisting of the engine oil, the transmission fluid, and the power steering fluid. The modified radiator hose transports the cooling fluid used to cool the combustion engine. The modified radiator hose is partially transparent such that the cooling fluid can be seen through the modified radiator hose. The ultraviolet lamp generates ultraviolet radiation.

Methods and systems are provided for controlling operation of an engine of a vehicle to supply power to a power box that in turn supplies power to loads external to the vehicle. In one example, a method comprises, responsive to a request by an operator to operate an engine to power one or more loads external to the vehicle, monitoring an engine temperature and issuing an alert requesting the operator to take mitigating action to reduce the engine temperature when the engine temperature reaches a threshold temperature, and controlling a cooling fan as a function of whether or not the mitigating action is taken. In this way, fuel economy may be improved and power supply to power external loads may be optimized.

A cooling control system for a working machine includes a fan, a housing to which the fan is attached, a prime mover having an output shall, a rotor to be rotated by a rotating power of the output shaft and to be rotated with the housing by a fluid introduced to a gap formed between the housing and the rotor, a fluid setting circuit to set an introduction amount of the fluid introduced to the gap, and a control device to control the fluid setting circuit to control the fan. The control device includes a setting circuit to set a target rotation speed of the fan based on a responsiveness of an actual rotation speed of the fan at time of changing of the target rotation speed of the fan.

A method of identifying air flow faults within a cooling system of an automobile comprises measuring the temperature of coolant entering a heat exchanger for the cooling system, measuring the temperature of coolant leaving the heat exchanger, and measuring the temperature of ambient air that is flowing into the heat exchanger, calculating Actual Delta T by subtracting the temperature of coolant leaving the heat exchanger from the temperature of coolant entering the heat exchanger, calculating Expected Delta T, wherein Expected Delta T is a pre-determined value of an expected difference between the temperature of the coolant entering the heat exchanger and the temperature of the coolant leaving the heat exchanger, calculating Effective Delta T by subtracting Expected Delta T from Actual Delta T, and identifying a fault in the air flow through the heat exchanger based on the value of Effective Delta T.

A method for ascertaining a control-caused behavior of a valve installed in a vehicle for adjusting a flow of a medium. Operating a pump, which has an electric motor and at least one pump element for conveying the medium, so that the medium is conveyed by the pump in that the pump element is driven by means of the electric motor. Controlling the valve by an electronic computing device of the vehicle. The control of the valve is varied by the electronic computing device. While the medium is conveyed by the pump, and while the control of the valve is varied: sensing at least one parameter characterizing the operation of the pump. Determining the behavior of the valve as a function of the sensed parameter.

When an engine rotation speed is lower than a reference rotation speed, first failure determination in which failure of a flow rate control valve is determined based on a pressure change of cooling water detected by a pressure sensor is executed, when a valve closing instruction to switch the flow rate control valve from an opened state to a closed state is output from a valve control device; and when an engine rotation speed is equal to or higher than the reference rotation speed, second failure determination in which failure of the flow rate control valve is determined based on a pressure change of cooling water detected by a pressure sensor is executed, when a valve opening instruction to switch the flow rate control valve from a closed state to an opened state is output from the valve control device.