| 摘要 |
This invention relates to a Switchable Water Pump and it's hydraulically or pneumatically actuated valve assembly which is able to block coolant circulation of the water cooled internal combustion engine, even though water pump is continuously rotating. By the actuation of valve mechanism; blocked coolant circulation will cause a rapid warm up of engine coolant which helps to reduce harmful exhaust emission. By using this logic, it is possible to create an independent block able circuit which is connected to the common water pump pressure line or suction line. By this advantage water pump main flow can be divided in to different cooling circuits and any of cooling circuit can be blocked while other circuit (such as EGR system cooling circuit) have flow by actuation of dedicated on/off valve assembly. Required power is obtained from existing hydraulic power sources on vehicle engine (such as engine lubrication oil pump or hydraulic steering pump or vacuum pump). Actuation control should be done by ECU via activating a dedicated micro solenoid valve. |
