Patent US3919986A successfully refreshed from Google Patents.
US3919986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Output controlling method and device for internal combustion engines
Assignee: Toyota Motor Corp
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Filing: 1973-10-03
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Granted: 1975-11-18
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Expires: 1993-10-03
Abstract
Abstract A method of and a device for controlling the output of an internal combustion engine, in which a mixture in an amount corresponding to the amount required for the full load operation of the engine is caused to flow into each cylinder in the suction stroke, even in the case of partial load operation, and, in the compression stroke, the amount of mixture required for the particular load of the engine is remained in the cylinder and the remaining part thereof is caused to flow back into the suction system from the cylinder.
Inventors
- 👤 Kenji Goto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:46
CPC Classifications
F; F02; F02D; F02D9/00; F02D9/08; F02D33/00; F02D9/04; F02D9/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
114 words
A method of controlling the output of a four-cycle internal combustion engine, comprising supplying an amount of mixture corresponding to the amount required at the full-load operation of the engine into a cylinder of the engine at the suction stroke, and at the compression stroke causing an amount of mixture in excess to the amount required for operation of the engine to flow back from the cylinder into a suction pipe by the action of the piston in said cylinder, said mixture in excess being delivered only to the suction pipe coupled to the corresponding cylinder and being substantially confined for use within said corresponding cylinder, whereby the output of the engine is controlled.
Claim 2
Independent Claim
114 words
A method of controlling the output of a four-cycle internal combustion engine, comprising supplying an amount of mixture corresponding to the amount required at the full-load operation of the engine into a cylinder of the engine at the suction stroke, and at the compression stroke causing an amount of mixture in excess to the amount required for operation of the engine to flow back from the cylinder into a suction pipe by the action of the piston in said cylinder, said mixture in excess being delivered only to the suction pipe coupled to the corresponding cylinder and being substantially confined for use within said corresponding cylinder, whereby the output of the engine is controlled.
Claim 3
Dependent Claim
53 words
The method of claim 1 wherein: said amount caused to flow back is controlled by throttling said flow-back of said excess mixture such that the amount of said flow-back entering a conduit communicating with said suction pipe is controlled, said throttling of said flow-back being achieved by a throttle disposed within said conduit.
Claim 4
Independent Claim
139 words
A device for controlling the output of an internal combustion engine comprising a suction port from which an amount of mixture corresponding to the amount required for the full load operation of the engine is supplied into a cylinder, a back-flow port provided separately from said suction port, a conduit communicating the cylinder with a suction pipe through the back-flow port in a direct fashion such that substantially all of said mixture delivered through said conduit to said suction pipe is supplied to said cylinder corresponding to said conduit and suction pipe, said back-flow port being opened only at a specific stage of the compression stroke of the engine, and a throttle valve provided in the conduit and being operated such that said throttle is angularly displaced in a closing direction as the load on the engine is increased.
Claim 5
Independent Claim
139 words
A device for controlling the output of an internal combustion engine comprising a suction port from which an amount of mixture corresponding to the amount required for the full load operation of the engine is supplied into a cylinder, a back-flow port provided separately from said suction port, a conduit communicating the cylinder with a suction pipe through the back-flow port in a direct fashion such that substantially all of said mixture delivered through said conduit to said suction pipe is supplied to said cylinder corresponding to said conduit and suction pipe, said back-flow port being opened only at a specific stage of the compression stroke of the engine, and a throttle valve provided in the conduit and being operated such that said throttle is angularly displaced in a closing direction as the load on the engine is increased.
Claim 6
Dependent Claim
48 words
The device of claim 3 wherein: said internal combustion engine is a four cycle engine; and said back-flow port is opened during the compression cycle between bottom dead center and 130* after bottom dead center, said back-flow port having a maximum opening at 60* after bottom dead center.
Claim 7
Dependent Claim
20 words
The device of claim 3 wherein: said suction pipe and said conduit are exterior to the walls of said cylinder.
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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |