Patent ID: 7819637

Claim:
A flow-metering valve for metering a flow of liquid, comprising: a liquid inlet port, through which the liquid is supplied to the flow-metering valve; a liquid outlet port, through which the liquid outflows from the flow-metering valve; a liquid chamber that is formed between the liquid inlet port and the liquid outlet port; a valve member, which is arranged in the liquid chamber, wherein: the valve member is reciprocally displaceable between a first position and a second position in the liquid chamber according to a differential pressure between a first position side of the valve member and a second position side of the valve member; the valve member enables communication between the liquid inlet port and the liquid outlet port when the valve member is spaced away from the first position; and the valve member is made of a magnetic material, a stopper that is arranged at the second position in the liquid chamber, wherein: the stopper is made of a magnetic material; and the stopper contacts the valve member when the valve member is located at the second position, which serves as a valve opening position; and an electromagnetic driving member that generates a magnetic attractive force between the valve member and the stopper to hold the valve member at the second position when the electromagnetic driving member is energized, wherein: the electromagnetic driving member is provided at a location radially outward of the stopper; and the electromagnetic driving member forms a magnetic field when the electromagnetic driving member is energized such that the electromagnetic driving member generates the magnetic attractive force between the valve member and the stopper to directly magnetically attract the stopper to the valve member.