Auto economy gauge
First Claim
1. For use in vehicles having an internal combustion engine with an intake manifold, a system for permitting a driver of the vehicle to evaluate whether he is operating the vehicle in a fuel-efficient manner, the system comprising:
- means forming an independent undivided closed volume chamber separate from the intake manifold;
means connecting the closed volume chamber and the intake manifold to permit fluid flow between the closed volume chamber and intake manifold including;
a fixed orifice to meter fluid flow between the closed volume chamber and the intake manifold, said closed volume chamber being open to said intake manifold only through said orifice;
differential pressure detecting means for detecting differential pressures across the fixed orifice; and
display means for visually displaying a direct indication of the differential pressure detected across said fixed orifice.
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Accused Products
Abstract
A system which aids the driver of an automobile in forming driving habits which result in better fuel economy includes apparatus for measuring the rate of absolute pressure change in the intake manifold of the automobile engine, together with a gauge or other visual display which provides the viewer a visual indication of the rate of change of intake manifold pressure. The gauge or display provides the driver with useful information as to the steadiness of his driving, and helps the driver to form the habit of smooth, gentle acceleration and deceleration.
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Citations
4 Claims
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1. For use in vehicles having an internal combustion engine with an intake manifold, a system for permitting a driver of the vehicle to evaluate whether he is operating the vehicle in a fuel-efficient manner, the system comprising:
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means forming an independent undivided closed volume chamber separate from the intake manifold; means connecting the closed volume chamber and the intake manifold to permit fluid flow between the closed volume chamber and intake manifold including; a fixed orifice to meter fluid flow between the closed volume chamber and the intake manifold, said closed volume chamber being open to said intake manifold only through said orifice; differential pressure detecting means for detecting differential pressures across the fixed orifice; and display means for visually displaying a direct indication of the differential pressure detected across said fixed orifice. - View Dependent Claims (2, 3, 4)
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Specification
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- Resources
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Current AssigneePaul S. Petersen
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Original AssigneePaul S. Petersen
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InventorsPetersen, Paul S.
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Primary Examiner(s)Ciarlante, Anthony V.
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Application NumberUS05/890,083Time in Patent Office526 DaysField of Search73/115, 73/113, 73/114US Class Current73/114.53CPC Class CodesG01L 19/08 Means for indicating or rec...G01L 7/18 using liquid as the pressur...
