Disclosed is a method for limiting fuel leakage from at least one injector in an engine of a motor vehicle, the engine being stopped and the motor vehicle ignition circuit being switched off, the injector being supplied with fuel via a fuel rail which is pressurized during operation, the pressurization persisting for a certain period when the engine has been stopped and the ignition circuit switched off, leading to leakage of fuel through the injector. The injection rail is subjected to forced cooling following the stoppage of the engine with the motor vehicle ignition circuit switched off, which is sufficient to reduce the pressure, the forced cooling continuing until the pressure in the rail is close to atmospheric pressure.

Agricultural machines such as sprayers can be improved by providing a control system configured to adjust an engine cooling package fan with variable speeds, to thereby minimize parasitic losses, based on progress of the HVAC system for attaining a desired temperature in the operator cab. In one aspect, as a gap between actual and desired temperatures (temperature differential) in the cab minimizes, the cooling package fan can be variably adjusted to increase or decrease in speed, depending on heating or cooling occurring in the cab, respectively. However, if a temperature of an area in the engine compartment reaches a predetermined threshold, such variable speed control can cease, and the cooling package fan can instead be controlled to cool the area.

An apparatus for controlling a cooling fan speed includes a cooling fan motor operating a cooling fan. A pump is connected to the cooling fan motor in series. A relay has one side connected to the cooling fan motor or the pump and another side connected a battery so that power of the battery may be supplied to any one of the cooling fan motor or the pump.

A system and approach for development of setpoints for a controller of a powertrain system. The controller may be parametrized as a function of setpoints to provide performance variables that are considered acceptable by a user or operator for current operating conditions of the engine or powertrain. The controller may determine set point trajectories in real time during operation of the powertrain system and determine positions of manipulated variables do drive controlled variables to associated and determined set point trajectories. The present system and approach may determine set point trajectories for powertrain conditions on-line and in real time, whereas set point trajectories have previously been determined off-line for powertrain control.

An air flap device for a motor vehicle, having an air flap member with a flow-through opening and having a plurality of air flaps, which protrude into the flow-through opening or pass through it and which are each mounted on the air flap member so that they can move between a blocking position as a working position and a feed-through position as another working position, wherein each air flap in its blocking position interferes with flow through the flow-through opening as intended to a greater extent than in the feed-through position, wherein the air flap device has, as one operating position, a closed position, in which each air flap of the plurality of air flaps is in the blocking position as the working position associated with the closed position, and has an open position as another operating position, in which each air flap of the plurality of air flaps is in the feed-through position as the working position associated with the open position, the air flap device having a drive device for supplying a driving force for the movement of the air flaps between the blocking position and the feed-through position and a coupling device for transfer of the driving force supplied by the drive device to the air flaps, the coupling device is coupled to the plurality of air flaps such that at least some of the air flaps, because of an adjustment operation of the air flap device into a target operating position, reach their target working positions associated with the target operating position at different points in time.

A method for improving the performance of a motor vehicle which has a cooler and a fan for cooling the vehicle's engine, the method includes detecting (s410) a temperature-related parameter which affects the engine's temperature during specific cooling conditions; and activating operation of the fan when the engine's temperature fulfils a predetermined condition; determining the (s440) predetermined condition on the basis of outcome as regards engine temperature over a predetermined period of time, and/or outcome as regards the detected parameter over a predetermined period of time. A computer program product includes program code (P) for a computer (200; 210) for implementing a method according to the invention. Also the device that performs the method and a motor vehicle equipped with the device are disclosed.

A control system is provided for thermal management of an aftertreatment device in an engine that is provided in an enclosure. The engine has a cooling fan that is operable in a first direction to cool said engine. The fan is also operable in a reverse direction opposite to the first direction. The control system includes a first temperature sensor that measures a temperature of the engine or the enclosure. The control system further includes a second temperature sensor that measures a temperature of the aftertreatment device. The control system also includes a processor that is coupled to the first and second temperature sensors. The processor is configured to issue control signals, based on whether regeneration is required by the aftertreatment device or not, for selectively controlling a direction of operation associated with the cooling fan.

Disclosed is a cooling system of a vehicle. The cooling system includes an integrated controller for controlling a cooling fan and an active air flap, wherein the cooling fan is connected to the integrated controller through a single data line, and the active air flap is connected to the integrated controller through a single data line. The integrated controller is configured to receive signals of temperatures of cooling water and ambient air via controller area network (CAN) communication using two data lines.

A thermostatic valve to connect a heat source, in particular a gear drive, with a heat exchanger, particularly a motor vehicle. The thermostatic valve having a thermostatic valve housing with a first inlet connection for a first inlet port and a second inlet connection for a second inlet port, as well as a first outlet connection for a first outlet port and a second outlet connection for a second outlet port. The thermostatic valve further including a moveable working element in an intake opening of the thermostatic valve housing to open and close the inlet and outlet ports and a separate restriction element provided in the thermostatic valve housing between the first inlet connection and the first outlet connection.

A system and methods for a vehicle are provided for adjusting each of a speed of a radiator fan and a position of grille shutters of the vehicle responsive to a temperature at a wastegate exceeding a temperature threshold. In one example, a system may include a radiator fan at a front end of a vehicle, an engine coupled to an exhaust passage, a turbine in the exhaust passage having a bypass conduit, a wastegate positioned in the turbine conduit, and the wastegate receiving airflow from downstream of the radiator fan via a cooling duct.