US4798084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measuring device for measuring a fuel injection quantity
Assignee: Toyota Motor Corp
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Filing: 1986-12-09
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Granted: 1989-01-17
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Expires: 2006-12-09
Abstract
Abstract A measuring device for measuring a fuel injection quantity comprising fuel volume sensing means including a fuel injection chamber connected to a fuel injection valve and receiving the fuel injection quantity therefrom, a back pressure chamber which faces the fuel injection chamber, bulkhead means located between the fuel injection chamber and the back pressure chamber as an intercept therebetween and responsive to the fuel injection quantity for generating a displacement, sensing means for sensing the displacement of the bulkhead means, pressure means for holding a pressure of the back pressure chamber to be of a constant value, fuel injection quantity computing means responsive to the sensing means for determining a fuel injection quantity, discharging means including fuel discharging means for discharging the injected fuel quantity from the fuel injection chamber to its exterior, discharging quantity computing means responsive to the fuel injection quantity computing means for computing a discharged quantity, and discharge control means responsive to the discharging quantity computing means for controlling the fuel discharging means so as to control the discharged quantity.
Inventors
- 👤 Takeshi Takahashi
- 👤 Naoyuki Tsuzuki
- 👤 Hidetaka Nohira
- 👤 Yukimitsu Omori
- 👤 Akio Takamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:41
CPC Classifications
F; F02; F02M; F02M65/00; F02M65/001; G; G01; G01F; G01F13/00; G01F3/00; G01F3/02; G01F3/20; F02B; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
175 words
A measuring device for measuring a fuel injection quantity, comprising: fuel volume sensing means including a fuel injection chamber connected to a fuel injection valve and receiving said fuel injection quantity therefrom, a back pressure chamber which faces said fuel injection chamber, bulkhead means located between said fuel injection chamber and said back pressure chamber as an intercept therebetween and responsive to said fuel injection quantity for generating a displacement, sensing means for sensing said displacement of said bulkhead means, and pressure means for holding a pressure of the back pressure chamber to be of a constant value, fuel injection quantity computing means responsive to said sensing means for determining a fuel injection quantity, discharging means including fuel discharging means for discharging said injected fuel quantity from said fuel injection chamber to its exterior, discharging quantity computing means responsive to said fuel injection quantity computing means for computing a discharged quantity, and discharge control means responsive to said discharging quantity computing means for controlling said fuel discharging means so as to control said discharged quantity.
Claim 2
Dependent Claim
175 words
A measuring device for measuring a fuel injection quantity, comprising: fuel volume sensing means including a fuel injection chamber connected to a fuel injection valve and receiving said fuel injection quantity therefrom, a back pressure chamber which faces said fuel injection chamber, bulkhead means located between said fuel injection chamber and said back pressure chamber as an intercept therebetween and responsive to said fuel injection quantity for generating a displacement, sensing means for sensing said displacement of said bulkhead means, and pressure means for holding a pressure of the back pressure chamber to be of a constant value, fuel injection quantity computing means responsive to said sensing means for determining a fuel injection quantity, discharging means including fuel discharging means for discharging said injected fuel quantity from said fuel injection chamber to its exterior, discharging quantity computing means responsive to said fuel injection quantity computing means for computing a discharged quantity, and discharge control means responsive to said discharging quantity computing means for controlling said fuel discharging means so as to control said discharged quantity.
Claim 3
Dependent Claim
28 words
The measuring device for measuring the fuel injection quantity according to claim 1 wherein said bulkhead means has a diaphragm and has a highly insulated fluid enclosed therein.
Claim 4
Dependent Claim
26 words
The measuring device for measuring a fuel injection quantity according to claim 1 wherein said sensing means is a sensor not contacting with said bulk means.
Claim 5
Dependent Claim
26 words
The measuring device for measuring the fuel injection quantity according to claim 1 wherein said sensing means is an electrical capacitance sensor for measuring said displacement.
Claim 6
Dependent Claim
26 words
The measuring device for measuring the fuel injection quantity according to claim 1 wherein said sensing means is an eddy current sensor for measuring said displacement.
Claim 7
Dependent Claim
29 words
The measuring device for measuring the fuel injection quantity according to claim 1 wherein said pressure means is a constant pressure gas chamber communicative with said back pressure chamber.
Claim 8
Dependent Claim
35 words
The measuring device for measuring the fuel injection quantity according to claim 1 wherein said fuel injection chamber has a buffer member with an access hole at a predetermined position near said back pressure chamber.
Claim 9
Dependent Claim
40 words
The measuring device for measuring the fuel injection quantity according to claim 1 wherein said bulkhead means is a bellows having a base portion attached to said back pressure chamber and a free end provided in said fuel injection chamber.
Claim 10
Dependent Claim
26 words
The measuring device for measuring the fuel injection quantity according to claim 8 wherein said bellows serves as said pressure means by the elastic deformation thereof.
Claim 11
Dependent Claim
57 words
The measuring device for measuring the fuel injection quantity according to claim 1 wherein said fuel injection quantity computing means includes means for computing said fuel injection quantity in response to a difference between a first signal representative of said displacement before said fuel injection and a second signal representative of said displacement after said fuel injection.
Claim 12
Dependent Claim
61 words
The measuring device for measuring the fuel injection quantity according to claim 1 wherein said exterior of said discharging means is a discharged chamber and said discharging means is a discharging valve provided in a path connecting said fuel injection chamber to said discharged chamber, thereby allowing said injected fuel expelled from said fuel injection chamber to enter said discharged chamber.
Claim 13
Dependent Claim
50 words
The measuring device for measuring the fuel injection quantity according to claim 11 wherein said discharging means includes means for connecting said back pressure chamber to said discharged chamber and holding a pressure of said discharged chamber toward a predetermined value less than said pressure of said back pressure chamber.
Claim 14
Dependent Claim
48 words
The measuring device for measuring the fuel injection quantity according to claim 1 wherein said discharging quantity computing means includes means for correcting said fuel injection quantity of said fuel injection quantity computing means in response to a first signal representative of said displacement before said fuel injection.
References Cited (Backward Citations)
DE371601C
Cited
US4086815A
Cited
JPS549505A
Cited
JPS55131723A
Cited
JPS57170358A
Cited
US4453403A
Cited
GB2105407A
Cited
JPS5872673A
Cited
DE3240622A1
Cited
US4488429A
Cited
JPS5988624A
Cited
US4546648A
Cited
JPS611862A
Cited
JPS6138523A
Cited
JPS6140458A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-17 | 1992-07-18 | 1993-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-17 | 1996-07-18 | 1997-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-17 | 2000-07-18 | 2001-01-17 | $7700.00 | Window Closed / Lapsed |