A heat management system includes a reservoir tank which stores a coolant and can replenish, with the coolant, a coolant line connected to the reservoir tank; a flow path transition valve which is connected to the downstream side, according to the flow direction of the coolant, of the reservoir tank and can control the flow direction of the coolant; and a coolant circulation pump which is connected to the downstream side, according to the flow direction of the coolant, of the flow path transition valve and pumps the coolant along the coolant line, wherein, through the layout structure of the reservoir tank, flow path transition valve, and coolant circulation pump, the distance between parts constituting a coolant system of a vehicle is minimized, and the overall flow of the coolant is formed in the direction of gravity, and, thereby, a pressure drop of the coolant can be reduced.

The invention relates to a fluid drain plug (10) for a fluid reservoir (50) with a drain hole (51), the plug having an extension in an axial direction (A) and comprising a body part (16) rotationally insertable into the drain hole (51), the body part having a proximal axial end (15), a distal axial end (17) and a substantially circular cross section with an outer surface (18), wherein the body part comprises a drain channel (92) having an inlet (91) located at the distal axial end and an outlet opening (94) disposed on the outer surface (18), the body part further comprising a bayonet-type connection slot (40) for accommodating a part of a radial projection (52) of a circumferential surface surrounding the drain hole (51), the bayonet-type connection slot being disposed on the outer surface and comprising an entrance (40a) at the distal axial end, a first path (41) and a second path (42), the first path (41) extending from the entrance, in the axial direction (A) and in one circumferential direction (C), to a first path terminal portion (70), wherein the first path terminal portion (70) is adapted to accommodate the radial projection (52), and the second path (42) extending from the first path terminal portion, in the axial direction (A) and in an opposite direction to the one circumferential direction (C), to a second path terminal portion (72), wherein the second path terminal portion (72) is adapted to accommodate the radial projection.

A control method for an engine coolant valve includes: monitoring an engine driving condition and an engine driving environment; predicting, by a controller, degradation of an engine coolant based on the engine driving condition and the engine driving environment by a controller; changing, by the controller, an opening of an integrated flow control valve when the engine coolant is predicted to be degraded; and generating, by the controller, a coolant exchange alarm when the engine coolant is predicted to be out of a control range and degraded.

Disclosed is a cooling system comprising: a first cooling circuit with a first coolant pump; a second cooling circuit with a second coolant pump; an expansion tank provided with an expansion chamber for accumulation of coolant, wherein the expansion chamber is connected to the second cooling circuit to allow the expansion chamber to receive coolant from the second cooling circuit; and a deaeration device arranged in the first cooling circuit for separation of air bubbles from the coolant circulating therein. The deaeration device is located at a lower position than the expansion tank and connected to said expansion chamber via a static line to allow air bubbles separated from the coolant in the deaeration device to migrate upwards in the static line towards the expansion chamber.

An estimator includes a model unit that calculates a state quantity by using an input signal and a relational expression that expresses a target model, a correction signal measurement sensor that measures a correction signal for correcting the state quantity, a correction unit that outputs a value for correcting the state quantity based on the correction signal to the model unit, and a model changing unit that changes the model unit in accordance with an oil flow related value that relates to a change of flow of cooling oil. The correction signal measurement sensor is arranged to be in contact with a metal member that includes a coil conductive wire that constitutes the stator coil, a terminal connected to the coil conductive wire, and a power line connected between the coil conductive wire and the terminal, at a point on which no cooling oil drops.

An estimator includes a model unit that calculates a state quantity by using an input signal and a relational expression that expresses a target model, a correction signal measurement sensor that measures a correction signal for correcting the state quantity, a correction unit that outputs a value for correcting the state quantity based on the correction signal to the model unit, and a model changing unit that changes the model unit in accordance with an oil flow related value that relates to a change of flow of cooling oil. The correction signal measurement sensor is arranged to be in contact with a metal member that includes a coil conductive wire that constitutes the stator coil, a terminal connected to the coil conductive wire, and a power line connected between the coil conductive wire and the terminal, at a point on which no cooling oil drops.

A coolant circuit for an internal combustion engine includes: a coolant pump; at least one coolant line; a radiator; and a coolant cavity delimited in the internal combustion engine. The coolant pump, the coolant line, the radiator and the coolant cavity are filled with a coolant. One or more sensors, configured to monitor the coolant concentration, are fixedly and permanently arranged in and/or on the coolant circuit.

Methods and systems are provided for estimating a cooling demand of a vehicle powertrain component and selecting a mode of operation of a vehicle cooling system based on the estimated cooling demands of the vehicle powertrain component and the energy usage of the cooling system components. Based on the selected operating mode, each of a radiator fan speed, a coolant system pump output, a vehicle grille shutter opening, and an opening of vents coupled to a powertrain component insulating enclosure may be concurrently adjusted to minimize the cooling parasitic losses while satisfying the cooling requirements of the vehicle.

An expansion tank for a cooling system of a motor vehicle has an inlet mouth and is provided with a shell in plastic material having a wall which defines a cavity for containing a coolant liquid; the shell has, in addition, a projecting collar, at the inlet mouth, and a first inner tubular wall, which protrudes downwards into the cavity and defines a passage with a lower outlet opening, to make the coolant liquid flow into the cavity; the shell has, in addition, a second tubular wall, projecting upwards into the cavity and defining a compartment which is vertically aligned with the passage and has an upper overflow opening vertically arranged at a height that is equal to or greater than that of the outlet opening.

An expansion tank for a coolant circuit of a motor vehicle includes a housing with an upper part with an upper joint and a lower part with a lower joint. An inlet is arranged on the upper part. An outlet is arranged on the lower part. The upper part is connectable by the upper joint to the lower joint of the lower part in at least two different orientations.