hitzdraht - air flow meters - arrangement for brennkraftmaschinen

摘要

The body (1) of the device in the engine air intake forms a substantially cylindrical prim. flow path (3) into which an integrally-formed projection (2) opens at a bellmouth (4a) to provide an auxiliary flow path (4) past the hot-wire element (10) and temp. compensator (12). These components (10,12) are installed in an axial section of the auxiliary flowpath (4) which then bends into a radial section (5) with outlets (5a) into the main flow. The bend has a pressure-damping effect which protects USE/ADVANTAGE : Esp. with automotive engine, compact flowmeter is sufficiently precise for control if air/fuel ratio but free from turbulence noise and pulsation instability, hot-wire element is not susceptible to damage from engine blowback.