A vehicle drive having a vacuum system for a vehicle having an internal combustion engine that is connected to a supply air line and to an exhaust air line. The vacuum system has an ejector. A propellant gas line opens into a nozzle channel of a propellant nozzle of the ejector. The nozzle channel opens into a mixing chamber of the ejector through a nozzle opening. A suction line opens into the mixing chamber and the mixing chamber on an outlet side opens directly or indirectly into a mixed gas line. The mixed gas line opens into the supply air line. The suction line is connected to a vacuum consumer, and the nozzle opening in the propellant nozzle is formed by a nozzle edge having teeth and/or corrugations.

Systems and methods for engine coalescer exhaust extraction are provided. In one embodiment, a system comprises an engine including a crankcase fluidly coupled to a coalescer, a muffler adapted to receive combustion exhaust gases from the engine, and a coalescer exhaust passage fluidly coupling the coalescer to the muffler. The coalescer exhaust passage includes an inlet arranged upstream of the muffler adapted to flow a motive fluid to the coalescer exhaust passage to increase a flow speed of coalescer exhaust through the coalescer exhaust passage.

Systems and methods for engine coalescer exhaust extraction are provided. In one embodiment, a system comprises an engine including a crankcase fluidly coupled to a coalescer, a muffler adapted to receive combustion exhaust gases from the engine, and a coalescer exhaust passage fluidly coupling the coalescer to the muffler. The coalescer exhaust passage includes an inlet arranged upstream of the muffler adapted to flow a motive fluid to the coalescer exhaust passage to increase a flow speed of coalescer exhaust through the coalescer exhaust passage.

The invention relates to an internal combustion engine comprising a turbocharger between an air filter and a crankcase, a fuel tank, and a ventilation arrangement for the fuel tank, comprising a jet suction pump.

This blow-by gas system is provided with: a blow-by gas flow path through which a blow-by gas discharged from an internal combustion engine passes; and an oil separator disposed midway along the blow-by gas flow path. A downstream end of the blow-by gas flow path connects to at least one of a predetermined portion of an intake passageway and a midway portion of an air introduction passageway. The predetermined portion is a portion at which at least some of the blow-by gas that has flowed into the intake passageway flows into the air introduction passageway together with an intake air in the intake passageway.

An abnormality determination apparatus for an internal combustion engine in which an intake passage upstream of a supercharger and a crankcase are connected by a breather line includes: an intake flow rate detection unit that detects an intake flow rate in the intake passage; and an abnormality determination unit that determines abnormality of the breather line. The abnormality determination unit accumulates a value calculated from a rotation second-order component of a fluctuation waveform of the intake flow rate over a predetermined period of time and determines the abnormality of the breather line when the accumulated value is less than a predetermined threshold.

An internal combustion engine for a motor vehicle includes a crankcase ventilation device for removing blow-by gas from a crankcase, a pressure sensor being provided for measuring the gas pressure in said crankcase, and a control unit connected to and in communication with the crankcase ventilation device being configured and/or programmed to run a tightness test for said crankcase ventilation device when the internal combustion engine is switched off.

A reflux valve includes a first supported portion that plugs a first opening when a valve body biased by a biasing member moves to one side in an axial direction, the first supported portion opens the first opening when the valve body moves to the other side in the axial direction against a biasing force of the biasing member due to negative pressure applied to a downstream side relative to an upstream side, the valve body includes a first hole extending from an end on the other side in the axial direction to one side in the axial direction, a valve body portion includes a second hole extending from an outer side in a radial direction and reaching the first hole, and the valve body portion includes a third hole at a different position from the second hole in the axial direction.

An oil separator separates oil from aerosol in a combustion engine. The oil separator includes a housing having an inlet opening for the aerosol, an impeller which can be rotatably driven about a rotational axis, and which is adapted for generating an aerosol flow along an axial direction of the impeller and arranged in the housing, and an impact wall which is designed in such a way that a projection of the impeller oriented axially and downstream in the air flow impinges on the impact wall. At least one part of a projection of the impeller oriented axially and downstream in the air flow impinges on the inlet opening.

An ejector device having a base body that includes a suction chamber for sucking in a suction medium, a mixing channel for mixing a propelling medium with the suction medium, and a drive nozzle device for generating and directing a propelling medium jet along a jet direction from the suction chamber and into the mixing channel. The ejector device also includes a fastening device for fastening the base body of the ejector device to a suction channel. The fastening device also includes at least one of a translational locking device for avoiding a translational movement of the base body relative to the suction channel in a direction running parallel to a center axis of a connecting piece of the suction channel and a rotational locking device for preventing the base body from rotating relative to the suction channel.