A Pump for recirculating a cooling fluid of a vehicle comprises a pump body, which is fixed during use; an impeller mounted on a driven shaft; with a friction coupling of the electromagnetic type, made of a fixed electromagnet, a rotor and an armature. A pulley for taking up a rotational movement is connected to a movement source such as a shaft of the combustion engine of the vehicle and mounted on an outer bearing keyed onto the pump body. An electric motor is provided for driving the driven shaft independently of the movement take-up pulley; and a bell member is fastened to an end of the driven shaft opposite to that which carries the impeller.

The friction coupling is designed to rotationally couple/decouple the pulley and bell member and the electric motor is arranged inside the bell member on the opposite side to the impeller relative to friction coupling.

The present disclosure provides a method of determining a coolant condition of a vehicle, and more particularly, a method of accurately determining a coolant condition, e.g., a condition in which gas is present in a system and an insufficient coolant condition without a separate additional sensor in a vehicle using an electric water pump (EWP). To this end, the present disclosure provides a method of determining a coolant condition of a vehicle, including, in a vehicle including an electric water pump (EWP) for circulating a coolant, acquiring driving state information of a water pump while the water pump is driven, by a controller, calculating a ripple value of a driving state from the acquired driving state information of the water pump, by the controller, and comparing the calculated ripple value with a reference value to determine a condition of a coolant, by the controller.

An electric water pump of which productivity, maintainability, and use convenience may be improved by simplifying a production process through a change in a structure, and a method of manufacturing the same. The electric water pump includes: a pump housing accepting a motor therein; an acceptor having a cylindrical shape of which one side is opened and formed at one side of the pump housing; a control substrate installed in the acceptor; an external terminal formed of a conductor and penetrating through the acceptor to electrically connect the control substrate to an external power supply; and an internal terminal formed of a conductor and penetrating through the pump housing and the acceptor to electrically connect the motor and the control substrate to each other.

A hybrid-driven dual pump for conveying a coolant for a combustion engine, is proposed. The dual pump comprises: a first pump assembly with a first pump impeller, a first spiral housing and a first pump shaft driven via a mechanical drive connection by a combustion engine; a second pump assembly with a second pump impeller, a second spiral housing, a second pump shaft and an electric drive; a joint pump housing enclosing the first pump assembly and the second pump assembly with a joint pump inlet and a joint pump outlet; and a flap arranged freely pivotably between an outlet of the first spiral housing and an outlet of the second spiral housing such that a direct flow connection between the first spiral housing and the second spiral housing is blocked.

A cooling apparatus for an internal combustion engine includes a pump, a radiator, a flow rate adjustment valve, a bypass passage, and a controller. The flow rate adjustment valve includes a valve member that rotates to change an open degree of the flow rate adjustment valve and a valve member biasing component that biases the valve member in a valve-closing direction in which the open degree decreases. The valve member rotates in a valve-opening direction in which the open degree increases when a pressure difference increases between positions upstream and downstream of the valve member in a flow direction of coolant in the circulation circuit and rotate in the valve-closing direction when the pressure difference decreases. The controller increases the pump discharge amount as a target radiator flow rate that is a target of an amount of coolant passing through the radiator increases.

A pump group of a cooling system of a vehicle engine is provided. The pump group extends with respect to an axis (X-X) and has an impeller, a shaft, the impeller being integrally mounted on the shaft, an electric motor having a rotor integrally mounted on the shaft and a stator. A pump body, extending with respect to the axis (X-X), has an impeller casing housing the impeller in an impeller chamber, and a motor casing housing the electric motor in a motor chamber. The motor casing has an intermediate tubular wall positioned between the rotor and the stator so as to define a rotor chamber and a stator chamber sealingly separated from each other. The stator chamber contains a predefined amount of cooling oil, the predefined amount of cooling oil at least partially filling the stator chamber so that the stator is cooled by convection.

A plug-in coolant pump for motor vehicles includes an impeller surrounded by a pump housing. The impeller can be driven about a longitudinal axis extending through the pump housing by a pump shaft. A seal is provided between the pump shaft and the pump housing to seal the coolant-carrying pump housing, wherein the pump housing includes retaining domes on which a sealing disc is fastened which sets a sealing gap between a pump inlet with a pressure slope and the open impeller.

In a urea injection system of a vehicle, to detect the shortage of the cooling water by using an electric water pump (EWP) to cool a dosing injector during the running of the vehicle engine, the apparatus for detecting shortage of the cooling water in the vehicle includes a urea injector that injects urea into an exhaust pipe of the vehicle, a pump that cools the urea injector, and a controller that applies a reference current to the pump, measures a time taken until a revolutions per minute (RPM) of the pump reaches a reference RPM, and detects the shortage of the cooling water in the pump by comparing the measured time and a reference time.

A vehicle thermal energy control system that is able to achieve improved heat management in the entirety of a vehicle is provided. A thermal energy control system is provided in a vehicle and includes heat sources and a heat amount distributor configured to assign a demanded heat amount calculated from heat demands generated in the entirety of the vehicle, to each heat source on the basis of a suppliable heat amount of each heat source.

A pump device for a cooling circuit of an internal combustion engine of a commercial or motor vehicle includes two electric pumps in parallel, each of which includes a switchable backflow valve in a suction line, so that the electric pumps can be operated selectively individually or in parallel.