- Oil pumps for passenger cars and utility vehicles
- as plug-in pumps, flange pumps, gear wheel or chain-driven pumps
- Oil pumps with direct connection to the engine speed
- Variable oil pumps, electro-hydraulic continuous adjustment for demand-based transportation of the lubricating oil
- Oil suction pumps (e.g. for the suction of oil from the cylinder head)
- Oil/vacuum tandem pumps
Product in focus – advantages
Oil pumps deliver the oil from the oil pan through the oil filter and oil cooler to the engine lubricating points.
The engine lubricating system is tasked with supplying the engine parts with a
sufficient quantity of lubricating oil. It is a fully closed system in which the oil must fulfil a number of tasks.
- Lubrication of all moving parts
- Cooling of engine components (protection against overheating)
- Discharge of deposits, carbon deposits and abrasion
- Corrosion protection
- Noise and vibration damping
- Ultrafine sealing (e.g. piston rings)
- Force transmission
|3 Cylinder bank 1|
|4 Oil pressure support valves|
|5 Injector nozzle valve|
|6 Cylinder bank 2|
|7 Crankshaft and connection rod bearing point|
|8 Chain tensioner|
|9 Balancer shaft|
|10 Pressure control valve|
|11 Oil pump|
|12 Oil pressure safety valve|
|13 Oil cooler (water-cooled)|
|14 Oil filter housing|
|15 Bypass valve|
|16 Filter cartridge|
|17 Non-return valve|
To ensure sufficient cooling and lubrication, the oil pump must pump the entire volume of oil through the engine 4 - 6 times per minute. Moreover, its design must ensure that the lubricating points are supplied with fresh oil as fast as possible after cold starting, and the flow rate is always adequate even at low engine speeds.
Take hydraulic valve timing systems or aluminium alloy engine blocks, for example – modern engines need increasing amounts of oil and lubricant. At the same time, the pump's power consumption must be radically reduced, to keep CO2 emissions as low as possible.
What with their many hydraulic tasks - some of them new - such as hydraulic valve clearance and camshaft compensation, piston cooling and a great deal more, modern engines require disproportionately high flow rates of oil, especially in the low speed range. In conventional, fixed speed pumps, their direct dependence on engine speed results in considerable power losses at higher speeds. Mechanically or electrically controlled oil pumps, on the other hand, enable a demand-based flow rate independent of speed, ensuring better efficiency.
Long life and high efficiency are the yardsticks by which we measure our oil pumps.
- Oil pumps are generally replaced in their entirety. They are not intended to be reconditioned.
- Oil pumps have a long service life, but this may be reduced by maintenance errors, poor oil quality, oil dilution, dirt or engine damage. It may therefore be necessary to change the oil pump early.
Designs and pump designs
- Oil pumps for utility vehicle engines are usually designed as a pump with gear or chain drive. They are driven indirectly by the crank mechanism.
- Oil pumps with gear or actuating drive are easier to replace than chain-driven oil pumps due to their design.
- Rotor pumps can generate high delivery rates at high pressures due to the type of design.
- The advantage of crescent pumps lies in their high delivery rate, particularly at low engine speeds.
- An oil pump can be driven by external teeth, internal toothing for crankshaft direct drives or auxiliary drives.
- In modern passenger cars and trucks, regulated oil pumps are used that
- deliver the oil flow in a demand-based manner and save fuel.