US4655186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for controlling fuel injection amount of internal combustion engine and apparatus thereof
Assignee: Toyota Motor Corp
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Filing: 1985-08-21
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Granted: 1987-04-07
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Expires: 2005-08-21
Abstract
Abstract In a method for controlling a fuel injection amount of an internal combustion engine of the present invention, an incremental fuel amount is calculated in accordance with an engine running condition when a high load state of the engine is detected, and an upper limit value of the incremental fuel amount is gradually increased at predetermined intervals. When the incremental fuel amount is equal to or lower than the upper limit value, the fuel injection amount is increased to the extent of the incremental fuel amount. When the incremental fuel amount exceeds the upper limit value, the fuel injection amount is increased with the upper limit value. With this controlling method, the fuel consumption efficiency and acceleration response can be improved and the generation of knock in the engine can be suppressed during the period of the increase of the fuel injection amount in the high load state.
Inventors
- 👤 Yuji Takeda
- 👤 Katsushi Anzai
- 👤 Osamu Harada
- 👤 Toshio Suematsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:40
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/04; F02D41/10; F02B; F02B3/00; F02B3/02
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
138 words
A method for controlling a fuel injection amount in an internal combustion engine, comprising the steps of: detecting a load of the engine; determining whether said load is higher than a predetermined amount; calculating a fuel quantity to be injected to the engine under a high load state in accordance with said load of the engine when said load of the engine is higher than said predetermined amount; gradually increasing an upper limit value for said fuel quantity at predetermined intervals while said load of the engine is higher than said predetermined amount; determining whether said fuel quantity exceeds said upper limit value; adjusting said fuel quantity to said upper limit value only when said fuel quantity exceeds said upper limit value; and supplying an amount of fuel to the engine which is based on said fuel quantity.
Claim 2
Independent Claim
138 words
A method for controlling a fuel injection amount in an internal combustion engine, comprising the steps of: detecting a load of the engine; determining whether said load is higher than a predetermined amount; calculating a fuel quantity to be injected to the engine under a high load state in accordance with said load of the engine when said load of the engine is higher than said predetermined amount; gradually increasing an upper limit value for said fuel quantity at predetermined intervals while said load of the engine is higher than said predetermined amount; determining whether said fuel quantity exceeds said upper limit value; adjusting said fuel quantity to said upper limit value only when said fuel quantity exceeds said upper limit value; and supplying an amount of fuel to the engine which is based on said fuel quantity.
Claim 3
Dependent Claim
30 words
A method according to claim 1, wherein said gradually increasing step includes increasing a rate of increase of said upper limit value according to an increase of the engine speed.
Claim 4
Dependent Claim
21 words
A method according to claim 1, wherein said gradually increasing step includes increasing said upper limit value at predetermined time intervals.
Claim 5
Dependent Claim
21 words
A method according to claim 1, wherein said gradually increasing step includes increasing said upper limit value at predetermined crank angles.
Claim 6
Independent Claim
155 words
A method for controlling a fuel injection amount in a internal combustion engine, comprising the steps of: detecting a load of an engine; determining whether said load is higher than a predetermined amount; calculating a fuel quantity to be injected to the engine under a high load state in accordance with said load of the engine when said load of the engine higher than said predetermined amount; deciding whether said fuel quantity exceeds a predetermined value; gradually increasing an upper limit value for said fuel quantity at predetermined intervals when said load of the engine is higher than said predetermined amount; determining whether said fuel quantity exceeds said upper limit value only when said fuel quantity exceeds said predetermined value; adjusting said fuel quantity to said upper limit value only when said fuel quantity exceeds said upper limit value; and supplying an amount of fuel to the engine which is based on said fuel quantity.
Claim 7
Independent Claim
155 words
A method for controlling a fuel injection amount in a internal combustion engine, comprising the steps of: detecting a load of an engine; determining whether said load is higher than a predetermined amount; calculating a fuel quantity to be injected to the engine under a high load state in accordance with said load of the engine when said load of the engine higher than said predetermined amount; deciding whether said fuel quantity exceeds a predetermined value; gradually increasing an upper limit value for said fuel quantity at predetermined intervals when said load of the engine is higher than said predetermined amount; determining whether said fuel quantity exceeds said upper limit value only when said fuel quantity exceeds said predetermined value; adjusting said fuel quantity to said upper limit value only when said fuel quantity exceeds said upper limit value; and supplying an amount of fuel to the engine which is based on said fuel quantity.
Claim 8
Dependent Claim
30 words
A method according to claim 5, wherein said gradually increasing step includes increasing a rate of increase of said upper limit value according to the increase of an engine speed.
Claim 9
Dependent Claim
21 words
A method according to claim 5, wherein a power incremental fuel amount of the engine is set in said predetermined value.
Claim 10
Dependent Claim
26 words
A method according to claim 5, further comprising the steps of detecting an engine temperature, and variably controlling said predetermined value according to said engine temperature.
Claim 11
Dependent Claim
26 words
A method according to claim 8, wherein said step of variably controlling said predetermined value includes increasing said predetermined value when said engine temperature is high.
Claim 12
Dependent Claim
32 words
A method according to claim 8, wherein said step of variably controlling said predetermined value includes setting a power incremental fuel amount in said predetermined value when said engine temperature is low.
Claim 13
Dependent Claim
21 words
A method according to claim 5, wherein said gradually increasing step includes increasing said upper limit value at predetermined time intervals.
Claim 14
Dependent Claim
21 words
A method according to claim 5, wherein said gradually increasing step includes increasing said upper limit value at predetermined crank angles.
Claim 15
Independent Claim
149 words
An apparatus for controlling a fuel injection amount in an internal combustion engine, comprising: means for detecting a load of the engine; means for determining whether said load is higher than a predetermined load; means for calcualting a fuel quantity to be injected to the engine under a high load state in accordance with said load of the engine when said load of the engine is higher than said predetermined load; means for gradually increasing an upper limit value for said fuel quantity at predetermined intervals when said load of the engine is higher than said predetermined load; means for determining whether said fuel quantity exceeds said upper limit value; means for adjusting said fuel quantity to said upper limit value only when said fuel quantity exceeds said upper limit value; and means for supplying an amount of fuel to the engine which is based on said fuel quantity.
Claim 16
Independent Claim
149 words
An apparatus for controlling a fuel injection amount in an internal combustion engine, comprising: means for detecting a load of the engine; means for determining whether said load is higher than a predetermined load; means for calcualting a fuel quantity to be injected to the engine under a high load state in accordance with said load of the engine when said load of the engine is higher than said predetermined load; means for gradually increasing an upper limit value for said fuel quantity at predetermined intervals when said load of the engine is higher than said predetermined load; means for determining whether said fuel quantity exceeds said upper limit value; means for adjusting said fuel quantity to said upper limit value only when said fuel quantity exceeds said upper limit value; and means for supplying an amount of fuel to the engine which is based on said fuel quantity.
Claim 17
Dependent Claim
32 words
An apparatus according to claim 13, wherein said gradually increasing means is also for increasing a rate of increase of said upper limit value responsive to an increase of the engine speed.
Claim 18
Dependent Claim
23 words
An apparatus according to claim 13, wherein said gradually increasing means is also for increasing said upper limit value at predetermined time intervals.
Claim 19
Dependent Claim
23 words
An apparatus according to claim 13, wherein said gradually increasing means is also for increasing said upper limit value at predetermined crank angles.
Claim 20
Dependent Claim
32 words
An apparatus according to claim 16, wherein said gradually increasing means is also for increasing a rate of increase of said upper limit value responsive to the increase of the engine speed.
Claim 21
Dependent Claim
21 words
An apparatus according to claim 16, wherein a power incremental fuel amount of the engine is set in said predetermined value.
Claim 22
Dependent Claim
27 words
An apparatus according to claim 16, further comprising means for detecting an engine temperature and means for variably controlling said predetermined value according to said engine temperature.
Claim 23
Dependent Claim
26 words
An apparatus according to claim 19, wherein said predetermined value variable control means includes means for increasing said predetermined value when said engine temperature is high.
Claim 24
Dependent Claim
35 words
An apparatus according to claim 19, wherein said predetermined value variable control means includes means for setting a power incremental fuel amount of the engine in said predetermined value when said engine temperature is low.
Claim 25
Dependent Claim
23 words
An apparatus according to claim 16, wherein said gradually increasing means is also for increasing said upper limit value at predetermined time intervals.
Claim 26
Dependent Claim
26 words
An apparatus according to claim 16, wherein said upper limit value gradually increasing means is also for increasing said upper limit value at predetermined crank angles.
Claim 27
Independent Claim
168 words
An apparatus for controlling a fuel injection amount in an internal combustion engine, comprising means for detecting a load of the engine; means for determining whether load is higher than a predetermined amount; means for calculating a fuel quantity to be injected to the engine under a high load state in accordance with said load of the engine when said load of the engine is higher than said predetermined amount; means for determining whether said fuel quantity exceeds a predetermined value; means for gradually increasing an upper limit value for said fuel quantity at predetermined intervals when said load of the engine is higher than said predetermined amount; means for determining whether said fuel quantity exceeds said upper limit value only when said fuel quantity exceeds said predetermined value; means for adjusting said fuel quantity to said upper limit value only when said fuel quantity exceeds said upper limit value; and means for supplying an amount of fuel to the engine which is based on said fuel quantity.
Claim 28
Independent Claim
168 words
An apparatus for controlling a fuel injection amount in an internal combustion engine, comprising means for detecting a load of the engine; means for determining whether load is higher than a predetermined amount; means for calculating a fuel quantity to be injected to the engine under a high load state in accordance with said load of the engine when said load of the engine is higher than said predetermined amount; means for determining whether said fuel quantity exceeds a predetermined value; means for gradually increasing an upper limit value for said fuel quantity at predetermined intervals when said load of the engine is higher than said predetermined amount; means for determining whether said fuel quantity exceeds said upper limit value only when said fuel quantity exceeds said predetermined value; means for adjusting said fuel quantity to said upper limit value only when said fuel quantity exceeds said upper limit value; and means for supplying an amount of fuel to the engine which is based on said fuel quantity.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |