Abstract:
A cooling fan (10) for a vehicle engine (50), comprising a fan casing (60) and a fan rotor (12) which is movable axially relative to the fan casing during operation. According to the invention there is an actuator (20) for moving the fan rotor (12) to positions which represent various degrees of protrusion (a) from an end of the fan casing (60) in order to optimise the fan's suction capacity and efficiency on the basis of current operating parameters such as fan speed and vehicle velocity.
Abstract:
The invention relates to 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 comprises the steps of: - detecting (s410) a temperature-related parameter which affects the engine's temperature during specific cooling conditions; - activating operation of the fan when the engine's temperature fulfils a predetermined condition. The method comprises the step of determining (s440) said 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. The invention relates also to a computer programme product comprising programme code (P) for a computer (200; 210) for implementing a method according to the invention. The invention relates also to a device and a motor vehicle equipped with the device.
Abstract:
The invention relates to a cooling system for a motor vehicle comprising a first heat exchanger (1), in particular, embodied in the form of a main cooler for cooling a first liquid coolant (3) of an internal combustion engine (2) by means of an air flow coming from the ambient air and a second heat exchanger (7, 13, 407, 415) for cooling gases introduceable into the internal combustion engine, in particular, exhaust gases and/or charge air, wherein the second heat exchanger (7, 13, 407, 415) is coolable by the an air flow coming from the ambient air and is spatially separated from the main cooler (1).
Abstract:
The invention relates to a cooling system for a motor vehicle in which a closing unit for the cooling airflow is monitored with regard to the function thereof in order to optimize the operational parameters of the internal combustion engine. Said closing unit, preferably a flap or shutter, is monitored in the function thereof for controlling the cooling airflow in order to avoid a temperature build-up or a falling short of the operating temperature. In order to monitor the position of the closing unit (1), the invention provides that the progression of the cooling water temperature is compared with a stored model progression of the temperature by using a temperature sensor which, as a rule, is present. If the cooling water temperature is within a predetermined tolerance range, the closing unit is functionally ready, and in the other case, the closing unit is blocked. In this case, the closing unit is deliberately controlled and the subsequent temperature progression is compared with a corresponding model progression. If the cooling water temperature is now outside another pre-set tolerance range (S21, S22), said range then serves as an index for blocking the closing unit (1). This shortcoming is indicated and/or stored.
Abstract:
The invention relates to an airflow vane shutter assembly for a motor vehicle (14). The shutter assembly includes a damper (16) configured to control the amount of intake air entering an engine compartment of the vehicle (14), the damper (16) providing an identification of the motor vehicle (14). In an alternative embodiment, the present invention relates to an airflow vane shutter assembly for a motor vehicle, the shutter assembly includes a damper (16) configured to control the amount of air entering an engine compartment of the vehicle. The assembly includes a sensor, the sensor receiving data input corresponding to temperature variable in combination with at least one or more of the following other variables: pressure, vehicle speed, transmission gear position, engine revolutions per minute, shift lever position, vehicle weight. The sensor then selects a position for the damper based upon the temperature variable in combination with one or more of the other input variables.
Abstract:
A first coolant flow passage (31, 32) is provided to extend in a longitudinal direction of a cylinder head (101). In at least one of cross sections perpendicular to the longitudinal direction, the first coolant flow passage (31, 32) is located between a flat plane (S1) including central axes of a plurality of combustion chambers (4) and parallel to the longitudinal direction and a central line plane (S2) including central lines of a plurality of intake ports (2). In at least one of cross sections perpendicular to the longitudinal direction, at least a portion (20c) of a second coolant flow passage is located between a cylinder block mating surface (la) of the cylinder head (101) and the intake port central line plane (S2). A coolant at a temperature lower than that of a coolant flowing in the second coolant flow passage (20c) flows in the first coolant flow passage (31, 32).
Abstract:
A fan cooling system and method are provided to control fan speed for cooling vehicle motor components while minimizing power consumption by the fan (52) and reducing engine fuel consumption for an engine partially powering the fan(52). The fan cooling system raises engine coolant temperature of a vehicle in motion to derive a fan speed demand so that fan speed may be reduced. The fan cooling system selects a maximum fan speed demand from one or more fan speed demands to command fan speed based on various sensed inputs, including engine coolant temperatures. The fan cooling system also improves cooling efficiency by incorporating slipheat protection for the fan (52) so as not to overdrive the fan for cooling.