US3921444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency meter for vehicle running speed versus fuel consumption rate
Assignee: Toyota Motor Corp
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Filing: 1974-10-18
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Granted: 1975-11-25
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Expires: 1994-10-18
Abstract
Abstract A frequency meter for vehicle running speed versus fuel consumption rate adapted to calculate an instant value of fuel consumption rate at a predetermined time interval and to drive a particular counter in a counter matrix arranged in a co-ordinate of vehicle running speed and fuel consumption rate, said particular counter corresponding to a point in the co-ordinate corresponding to particular vehicle running speed and fuel consumption rate at a given moment. The frequency matrix thus obtained can favourably be used to draw frequency contour lines regarding occurance of various combinations of vehicle running speeds versus fuel consumption rates.
Inventors
- 👤 Mitsuru Taira
- 👤 Giichiro Ono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:14
CPC Classifications
G; G01; G01F; G01F9/00; G01F9/02; G01F9/023
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
190 words
A frequency meter for vehicle running speed versus fuel consumption rate comprising a speed meter, a fuel flow meter, means to calculate an instant value of the fuel consumption rate from the ratio of the vehicle running speed measured by said speed meter and the fuel flow rate measured by said fuel flow meter, means to designate a region out of a first group of a plurality of predetermined steppedly arranged regions according to said instant value of the fuel consumption rate, said designated region being the one to which said instant value belongs, means to designate a region out of a second group of a plurality of predetermined steppedly arranged regions according to said speed measured by said speed meter, said designated region being the one to which said speed belongs, a counter matrix composed of counters corresponding to a matrix constituted by said fiRst and second groups of regions and means to actuate a particular counter for each predetermined time, said particular counter being the one located at the crossing point of a set of regions which are at said instant designated in said first and second groups.
Claim 2
Dependent Claim
190 words
A frequency meter for vehicle running speed versus fuel consumption rate comprising a speed meter, a fuel flow meter, means to calculate an instant value of the fuel consumption rate from the ratio of the vehicle running speed measured by said speed meter and the fuel flow rate measured by said fuel flow meter, means to designate a region out of a first group of a plurality of predetermined steppedly arranged regions according to said instant value of the fuel consumption rate, said designated region being the one to which said instant value belongs, means to designate a region out of a second group of a plurality of predetermined steppedly arranged regions according to said speed measured by said speed meter, said designated region being the one to which said speed belongs, a counter matrix composed of counters corresponding to a matrix constituted by said fiRst and second groups of regions and means to actuate a particular counter for each predetermined time, said particular counter being the one located at the crossing point of a set of regions which are at said instant designated in said first and second groups.
Claim 3
Dependent Claim
79 words
A frequency meter according to claim 1, wherein the speed meter and the fuel flow meter are of an analogue type, the analogue values obtained by said meters being processed by an analogue computer to produce said instant value of the fuel consumption rate as an analogue value which is then converted into a digital value by an A/D converter, said digital value being applied to a diode matrix to make a designation in said first group of regions.
Claim 4
Dependent Claim
69 words
A frequency meter according to claim 1, wherein the speed meter is of an analogue type, the analogye value obtained by said speed meter being converted into a frequency signal by a V/F converter, said frequency signal being processed by a timing means and a gate means to produce a digital value, which is applied to a shift register to make a designation in said second group of regions.
Claim 5
Dependent Claim
27 words
A frequency meter according to claim 3, wherein said timing means also serves as a timing means to actuate the counter matrix at a predetermined time interval.
Claim 6
Dependent Claim
60 words
A frequency meter according to claim 1, wherein the speed meter and the fuel flow meter are of a digital type, and all operations including the calculation of said instant value of the fuel consumption rate, the designation of the regions in said first and second groups and the actuation of said counter matrix are performed by a digital computer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |