As a development partner of its customers, SHW possesses a broad portfolio of engine oil pumps and extensive know-how. The company offers robust efficiency-optimised oil pumps for the widest range or engines- from small two-cylinder engines to large heavy-duty motors.
SHW offers its engine oil pumps in a range of models.
Fixed displacement pumps
If engine speed increases, the flow rate of the oil pumps increases as well. This raises the oil pressure in the engine. The maximum pressure is capped by a cut-off valve. This valve opens automatically as soon as a certain oil pressure is exceeded and keeps the oil pressure in the engine within the defined parameters.
The fixed displacement pumps from SHW feature optimised pump geometry to maximise efficiency. As a result, they place less load on the engine. This reduces the power needed to drive them and therefore fuel consumption.
SHW has extensive knowledge in manufacturing this type of pump. The focus of development lies on the compact design and high efficiency. Fixed displacement pumps from SHW are used in many internal combustion engines.
They are available as internal gear pumps with or without a crescent, or as pressure-controlled oil pump.
Variable oil pumps / Map-controlled oil pumps
Variable oil pumps from SHW adjust the flow rate to the oil requirements for the respective engine speed and temperature range of the engine. They do this either by moving the pump wheels towards each other axially or, in the case of a vane pump, by adjusting the adjustment ring in the pump housing. If the engine needs less oil, the flow rate of the pump reduces accordingly. This makes them different to fixed displacement oil pumps.
SHW develops and produces various models of variable oil pumps, such as regulated pumps, external gear pumps or vane pumps. In this way they address the requirements of the various types of engine. In addition, oil pumps can be combined with vacuum pumps and/or balancer shafts.
A map-controlled oil pump is a special form of variable oil pump that possesses an electromagnetic control valve. The map stores the target pressure values that the pump should attain. These values are based on the operating parameters of the combustion engine. At the same time, the map-controlled pump is networked to the engine control unit on-board the vehicle. In this way it can set the engine oil pressure to the required setting regardless of its current operating condition. The oil flow is regulated by the electromagnetic control valve.
SHW offers variable oil pumps as external gear pumps or as vane pumps.