Device and Method for Ascertaining Measured Values of Gases and/or an Aerosol for a Machine

摘要

In order to improve a system for monitoring the working chamber atmosphere of a machine, there is proposed a measuring device (2) with a suction means (8) that draws out an aerosol air mixture from the working chamber (4) of the machine and feeds the same to an optical sensor unit with at least an optical emitter (15) and at least an optical receiver (17). The optical sensor unit is operated by means of an electronic device. The suction means is configured as a compressed air jet pump (8) with a compressed air feed (26), a compressed air nozzle (32), a preferably funnel-shaped pressure discharge channel and an underpressure region (10), with the compressed air nozzle (32) having an outlet direction which is oriented substantially in the direction of the pressure discharge channel. The compressed air feed (26) can be connected to a compressed air source. A suction line that can be connected to the working chamber (4) of the machine is connected to the underpressure region (10). According to the invention, the optical sensor unit has an optical passage between the optical emitter (15) and the optical receiver (17) which is oriented substantially perpendicular to the outlet direction of the compressed air nozzle (32) and leads through the underpressure region.

主权项

1. A measuring device for determining measured data for an aerosol in the working chamber of a machine, namely the aerosol concentration in the working chamber of an internal combustion engine, with a suction means that draws out an aerosol air mixture from the working chamber of the machine and feeds the same to an optical sensor unit having at least an optical emitter and at least an optical receiver, and with an electronic device for operating the optical sensor unit, wherein the suction means is configured as a compressed air jet pump with a compressed air feed, a compressed air nozzle, a preferably funnel-shaped pressure discharge channel and an underpressure region, the compressed air nozzle having an outlet direction which is oriented substantially in the direction of the pressure discharge channel, the compressed air feed being connectable to a compressed air source, and a suction line that is connectable to the working chamber of the machine being connected to the underpressure region,
characterized in that the optical sensor unit has an optical passage between the optical emitter and the optical receiver which is oriented substantially perpendicular to the outlet direction of the compressed air nozzle and leads through the underpressure region.