Patent US3815564A successfully refreshed from Google Patents.
US3815564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection device for internal combustion engines
Assignee: Denso Corp
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Filing: 1972-03-03
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Granted: 1974-06-11
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Expires: 1992-03-03
Abstract
Abstract Electrical signals representing the revolutions, load, temperature and acceleration of the revolutions of the internal combustion engine are detected and introduced into a controller, the output of which is used to actuate a servo motor or electromagnetic valve, whereby the time at which the fuel injection pump starts operating is controlled, thus preventing any undesirable combustion products from being produced.
Inventors
- 👤 T Suda
- 👤 T Akashi
- 👤 H Dohshita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:38
CPC Classifications
F; F02; F02D; F02D1/00; F02D1/16; F02D1/18; F02D41/00; F02D41/30; F02D41/38; F02D41/40; F02D41/406; F02D41/407; F02D41/408; F02M; F02M41/00; F02M41/08; F02M41/10; F02M41/12; F02M41/123; F02M41/125; F02M41/126; F02M41/128; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
223 words
A fuel injection device for an internal combustion engine having a pump means for injecting high pressure fuel into each engine cylinder, a pump driving means connected with said engine for driving said pump means by said engine and a connecting means provided between said pump means and said pump driving means for connecting said pump means with said pump driving means to be able to change the relative position of the pump driving shaft to the engine crank shaft so as to change the fuel injection timing of said pump means comprising: detector means installed in said engine for detecting at least three engine parameters including the number of revolutions of the engine, the actual combustion temperature in the cylinder and the acceleration of the engine as measured by the rate of change of engine revolutions with time and for producing electrical signals representing said engine parameters; a controller coupled with said detector means for performing logical operations on the output signal of said detector means and for producing an output signal when the total value of said engine parameters meets a predetermined value; and means connected with said connecting means and said controller for driving said connecting means so as to change said relative position of said pump driving shaft to said engine crank shaft, thereby changing said fuel injection timing.
Claim 2
Dependent Claim
223 words
A fuel injection device for an internal combustion engine having a pump means for injecting high pressure fuel into each engine cylinder, a pump driving means connected with said engine for driving said pump means by said engine and a connecting means provided between said pump means and said pump driving means for connecting said pump means with said pump driving means to be able to change the relative position of the pump driving shaft to the engine crank shaft so as to change the fuel injection timing of said pump means comprising: detector means installed in said engine for detecting at least three engine parameters including the number of revolutions of the engine, the actual combustion temperature in the cylinder and the acceleration of the engine as measured by the rate of change of engine revolutions with time and for producing electrical signals representing said engine parameters; a controller coupled with said detector means for performing logical operations on the output signal of said detector means and for producing an output signal when the total value of said engine parameters meets a predetermined value; and means connected with said connecting means and said controller for driving said connecting means so as to change said relative position of said pump driving shaft to said engine crank shaft, thereby changing said fuel injection timing.
Claim 3
Dependent Claim
127 words
A fuel injection device for an internal combustion engine as defined in claim 1 wherein said connecting means comprises a first screw formed at one end of said pump driving shaft, a second screw formed at one end of a drive shaft connected with said engine crank shaft, a nut engaged with said first and second screws for changing the relative position of said pump driving shaft to said drive shaft by the axial movement thereof, a piece engaged with said nut and provided with teeth on one side thereof for driving said nut axially, a worm engaged with said teeth for driving said piece axially, and an electric motor connected with said controller for driving said worm in response to the output signal of said controller.
Claim 4
Dependent Claim
136 words
A fuel injection device for an internal combustion engine as defined in claim 1 wherein said pump means is a distributor type; said connecting means has at least a rotatable roller holder for changing the fuel injection timing; and said driving means comprises a piston biased by a spring and connected with said roller holder, a fluid chamber formed on one side of said piston and connected with a suction passage and a drain passage for moving said piston by the fluid therein, a first electromagnetic valve installed at said suction passage for charging the fluid into said fluid chamber in response to the output signal of said controller and a second electromagnetic valve installed at said drain passage for draining the fluid from said fluid chamber in response to the output signal from said controller.
Claim 5
Dependent Claim
78 words
A fuel device for an internal combustion engine as defined in claim 1 wherein said pump means is a distributor type; said connecting means has at least a rotatable roller holder for changing the fuel injection timing; and said driving means comprises a piston biased by a spring and connected with said roller holder, and an electric motor whose shaft is connEcted with said piston for driving said piston in response to the output signal of said controller.
Claim 6
Dependent Claim
110 words
A fuel injection device for an internal combustion engine as defined in claim 1 wherein said pump means is a distributor type; said connecting means has at least a rotatable roller holder for changing the fuel injection timing; and said driving means comprises a piston biased by a spring and connected with said roller holder, a fluid chamber formed on one side of said piston and connected with a suction passage and a drain passage for moving said piston by the fluid therein, and an electromagnetic valve installed at either of said pipes for transferring the fluid in said fluid chamber in response to the output signal of said controller.
Claim 7
Dependent Claim
31 words
A fuel injection device for an internal combustion engine as defined in claim 1 wherein said detector means further detects engine load and produces an electrical signal representing the engine load.
Claim 8
Dependent Claim
31 words
A fuel injection device for an internal combustion engine as defined in claim 2 wherein said detector means further detects engine load and produces an electrical signal representing the engine load.
Claim 9
Dependent Claim
30 words
A fuel injection device for an internal combustion engine as defined in claim 3 wherein said detector further detects engine load and produces an electrical signal representing the engine load.
Claim 10
Dependent Claim
30 words
A fuel injection device for an internal combustion engine as defined in claim 4 wherein said detector further detects engine load and produces an electrical signal representing the engine load.
Claim 11
Dependent Claim
30 words
A fuel injection device for an internal combustion engine as defined in claim 5 wherein said detector further detects engine load and produces an electrical signal representing the engine load.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |