Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
272 words
In an apparatus for measuring the mass of a flowing medium, which includes a flow conduit for the medium which has a restricted section, a bypass line which has a mouth connected to said restricted section and through which a mass of the medium flows which is at a predetermined proportion with respect to a mass of the medium flowing through the flow conduit and discharges from said mouth into said restricted section, at least one temperature-dependent resistor disposed in the bypass line, and a regulating means for regulating the temperature and/or resistance of the at least one temperature-dependent resistor, in accordance with the flowing mass of medium wherein a control variable of the at least one temperature-dependent resistor, is a standard for the flowing mass of medium, the improvement wherein said restricted section includes a shaped body which experiences a medium flow around it, said shaped body being disposed coaxially within the said flow conduit to form said restricted section of the flow conduit for the medium and is embodied such that the flow cross section of the medium in the flow direction becomes smaller up to the mouth of the bypass line and beyond the mouth of the bypass line widens by an amount which corresponds to the bypass line cross section at the mouth, and said shaped body is embodied such that the widening of the flow cross section for the medium by the amount of the bypass line cross section at the mouth of the bypass line is effected over a length extending from an upper edge to a lower edge of the mouth in the flow direction.
Claim 2
Dependent Claim
272 words
In an apparatus for measuring the mass of a flowing medium, which includes a flow conduit for the medium which has a restricted section, a bypass line which has a mouth connected to said restricted section and through which a mass of the medium flows which is at a predetermined proportion with respect to a mass of the medium flowing through the flow conduit and discharges from said mouth into said restricted section, at least one temperature-dependent resistor disposed in the bypass line, and a regulating means for regulating the temperature and/or resistance of the at least one temperature-dependent resistor, in accordance with the flowing mass of medium wherein a control variable of the at least one temperature-dependent resistor, is a standard for the flowing mass of medium, the improvement wherein said restricted section includes a shaped body which experiences a medium flow around it, said shaped body being disposed coaxially within the said flow conduit to form said restricted section of the flow conduit for the medium and is embodied such that the flow cross section of the medium in the flow direction becomes smaller up to the mouth of the bypass line and beyond the mouth of the bypass line widens by an amount which corresponds to the bypass line cross section at the mouth, and said shaped body is embodied such that the widening of the flow cross section for the medium by the amount of the bypass line cross section at the mouth of the bypass line is effected over a length extending from an upper edge to a lower edge of the mouth in the flow direction.
Claim 3
Dependent Claim
17 words
An apparatus as defined by claim 1 in which the shaped body surrounds a fuel injection valve.
Claim 4
Dependent Claim
61 words
An apparatus as defined by claim 2, wherein downstream of the mouth of the bypass line, a section of the flow conduit of the medium is provided in which, while the same flow cross section for the medium is maintained, the wall of the flow conduit for the medium and the wall of the shaped body extend parallel to one another.
Claim 5
Dependent Claim
82 words
An apparatus as defined by claim 1 in which the restricted section is formed by a course of the wall of the medium flow conduit and said shaped body which is approximately Venturi-like in shape, the flow cross section for the medium of which is reduced in the flow direction up to the mouth of the bypass line and beyond the mouth of the bypass line is widened by an amount which corresponds to the bypass line cross section at the mouth.