Fixed and variable pumps with parallel flow

摘要

A pump (1, 10) having a housing (15) with a suction-side fluid inlet (4) and with a pressure-side fluid outlet (5), having a first pump unit (2, 11) and having a second pump unit (3, 12), the first pump unit (2, 11) being connected hydraulically in parallel with respect to the second pump unit (3, 12), wherein the first pump unit (2, 11) is a pump unit that exhibits a constant volume flow, wherein the second pump unit (3, 12) is a pump unit that exhibits variably adjustable volume flow.

主权项

1. An internal combustion engine comprising:
an oil pump (1, 10) for lubricating parts of the internal combustion engine, the oil pump having a housing (15) with a single suction-side fluid inlet (4) and with a single pressure-side fluid outlet (5), the oil pump having a first pump unit (2, 11) and having a second pump unit (3, 12), the first pump unit (2, 11) being connected hydraulically in parallel with respect to the second pump unit (3, 12), wherein the first pump unit (2, 11) is a pump unit that exhibits a constant volume flow, wherein the second pump unit (3, 12) is a pump unit that exhibits variably adjustable volume flow for regulating a pressure of the oil delivered through the internal combustion engine as a function of a temperature of the oil, wherein the variably adjustable volume flow of the second pump unit (3, 12) can be adjusted from positive volume flow values to negative volume flow values, with the volume flow of the second pump unit (3, 12) being reversed, and wherein at a first temperature of the oil, the second pump unit delivers the oil in a forward direction towards the internal combustion engine, and at a second temperature of the oil that is lower than said first temperature, the second pump unit delivers at least a portion of the oil in a reverse direction in order to reduce a volume of oil being delivered to the internal combustion engine.