Electric motor vehicle vacuum pump arrangement

US9989058B2 · kind B2 · utility

Assignee

• PIERBURG PUMP TECHNOLOGY GMBH · DE

Inventors

• Nabil Salim Al-Hasan · Korschenbroich, DE
• Mathias Zill · Nossen, DE
• Sebastian Cramer · Pulheim, DE
• Daniel Mueller · Dubuque, US

Key dates

• Filing date: Mar 5, 2013
• Grant date: Jun 5, 2018
• Expiry date: Feb 24, 2034

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04C2270/12
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An electric vehicle vacuum pump assembly includes a combination, a separate acoustic barrier casing configured to encase the combination in each of a radially-spaced relationship and an axially-spaced relationship, and an annular gastight attenuation assembly radially arranged between the separate acoustic barrier casing on a first side and the combination on a second side. The combination comprises a pump unit and a drive motor comprising a rotor space, a stator space, a ventilation inlet, and a ventilation outlet. The rotor space comprises a motor rotor, and the stator space comprises a motor stator. The separate acoustic barrier casing comprises an intake connection and a discharge connection. The ventilation inlet and the ventilation outlet of the drive motor are configured to provide a forced ventilation past the annular gastight attenuation assembly and through at least one of the rotor space and the stator space.