| 摘要 |
An electric pump unit which comprises an outer rotor having a trochoidal tooth profile and an inner rotor which meshes with the outer rotor in such a state the inner rotor and the outer rotor are placed eccentric relative to each other for rotation and also comprises a pump part which is accommodated in a bottomed cylindrical pump housing. A low pressure portion and a high pressure portion are formed by both the rotors, and oil is made to be sucked and discharged through an inlet port and an outlet port which communicate respectively with the low pressure portion and the high pressure portion. A relief valve is provided for circulating oil from the high pressure portion to the low pressure portion when an oil pressure at the high pressure side reaches or exceeds a predetermined pressure. |
