US4602600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling diesel engine
Assignee: Toyota Motor Corp
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Filing: 1985-02-01
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Granted: 1986-07-29
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Expires: 2005-02-01
Abstract
Abstract Electric current supply to an actuator is ON-OFF controlled in such a manner that fuel supply quantity is made to be zero on condition that an engine rotation speed reaches a rotation speed less than a predetermined one in a low rotation region and a starter switch is turned OFF, whereby overrun of an engine and reckless run of a vehicle are prevented when a rotation sensor is in an abnormal condition.
Inventors
- 👤 Takao Akatsuka
- 👤 Masaomi Nagase
- 👤 Hideo Miyagi
- 👤 Takahide Kawamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:56
CPC Classifications
F; F02; F02M; F02M41/00; F02M41/08; F02M41/10; F02M41/12; F02M41/123; F02M41/125; F02M41/126; F02D; F02D17/00; F02D17/04; F02D31/00; F02D31/001; F02D31/007; F02D31/009; F02D41/00; F02D41/22; F02D41/222; F02B; F02B3/00; F02B3/06; F02D41/20; F02D2041/202; F02D2041/2058; F02D2200/00; F02D2200/02; F02D2200/04; F02D2200/0406; F02D41/30; F02D41/38; F02D41/40; F02D41/406; F02D41/408
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
253 words
A method for controlling a diesel engine wherein a fuel injection rate of fuel injection pump is electronically determined in accordance with an engine rotational speed detected by an engine rotational speed sensor means and an amount of depression of an accelerator pedal, said engine rotational speed sensor means generating pulses proportional to the engine rotational speed, the fuel injection rate increasing as the engine rotational speed decreases under a fixed amount of depression of the accelerator pedal, and the fuel injection rate increasing as the amount of depression of the accelerator pedal increases, said method comprising the steps of: (a) when an off state of a starter for the diesel engine is detected; monitoring the generation of said pulses to detect a failure of said engine rotational speed sensor means, said failure being detected when no pulse is generated after a first predetermined time has elapsed, the first predetermined time commencing when the off state of the starter is detected; generating an abnormal signal indicative of said failure of said engine rotational speed sensor means; once the abnormal signal is generated and the off state of the starter is detected, determining said fuel injection rate at zero regardless of the amount of the depression of said accelerator pedal; and (b) when an on state of said starter is detected; determining said fuel injection rate at a predetermined value of injection for a second predetermined period of time regardless of said engine rotational speed and said amount of depression of the accelerator pedal.
Claim 2
Independent Claim
253 words
A method for controlling a diesel engine wherein a fuel injection rate of fuel injection pump is electronically determined in accordance with an engine rotational speed detected by an engine rotational speed sensor means and an amount of depression of an accelerator pedal, said engine rotational speed sensor means generating pulses proportional to the engine rotational speed, the fuel injection rate increasing as the engine rotational speed decreases under a fixed amount of depression of the accelerator pedal, and the fuel injection rate increasing as the amount of depression of the accelerator pedal increases, said method comprising the steps of: (a) when an off state of a starter for the diesel engine is detected; monitoring the generation of said pulses to detect a failure of said engine rotational speed sensor means, said failure being detected when no pulse is generated after a first predetermined time has elapsed, the first predetermined time commencing when the off state of the starter is detected; generating an abnormal signal indicative of said failure of said engine rotational speed sensor means; once the abnormal signal is generated and the off state of the starter is detected, determining said fuel injection rate at zero regardless of the amount of the depression of said accelerator pedal; and (b) when an on state of said starter is detected; determining said fuel injection rate at a predetermined value of injection for a second predetermined period of time regardless of said engine rotational speed and said amount of depression of the accelerator pedal.
Claim 3
Dependent Claim
31 words
A method for controlling of a diesel engine as set forth in claim 1, wherein said second predetermined period of time is determined for increasing the rotational speed of the engine.
Claim 4
Independent Claim
288 words
A method for controlling a diesel engine wherein a fuel injection rate is electronically determined in accordance with an engine rotational speed detected by an engine rotational speed sensor means and an amount of depression of an accelerator pedal, the engine rotational speed sensor means generating pulses directly proportional to the engine rotational speed, said method comprising the steps of: feeding fuel to the diesel engine at a fuel injection rate; adjusting the fuel injection rate in response to the engine rotational speed and the amount of depression of the accelerator pedal, the fuel injection rate increasing as the engine rotational speed decreases for a fixed amount of depression of the accelerator pedal, and the fuel injection rate increasing as the amount of depression of the accelerator pedal increases; (a) when an off state of a starter for the diesel engine is detected; monitoring the generation of said pulses to detect a failure of said engine rotational speed sensor means, said failure being detected when no pulse is generated after a first predetermined time has elapsed, the first predetermined time commencing when the off state of the starter is detected; generating an abnormal signal indicative of said failure of said engine rotational speed sensor means; and once the abnormal signal is generated and the off state of the starter is detected, determining said fuel injection rate at zero regardless of the amount of the depression of said accelerator pedal; and (b) when an on state of the starter for the diesel engine is detected; immediately determining said fuel injection rate at a predetermined value of injection for a second predetermined period of time regardless of said engine rotational speed and said amount of depression of the accelerator pedal.
Claim 5
Independent Claim
288 words
A method for controlling a diesel engine wherein a fuel injection rate is electronically determined in accordance with an engine rotational speed detected by an engine rotational speed sensor means and an amount of depression of an accelerator pedal, the engine rotational speed sensor means generating pulses directly proportional to the engine rotational speed, said method comprising the steps of: feeding fuel to the diesel engine at a fuel injection rate; adjusting the fuel injection rate in response to the engine rotational speed and the amount of depression of the accelerator pedal, the fuel injection rate increasing as the engine rotational speed decreases for a fixed amount of depression of the accelerator pedal, and the fuel injection rate increasing as the amount of depression of the accelerator pedal increases; (a) when an off state of a starter for the diesel engine is detected; monitoring the generation of said pulses to detect a failure of said engine rotational speed sensor means, said failure being detected when no pulse is generated after a first predetermined time has elapsed, the first predetermined time commencing when the off state of the starter is detected; generating an abnormal signal indicative of said failure of said engine rotational speed sensor means; and once the abnormal signal is generated and the off state of the starter is detected, determining said fuel injection rate at zero regardless of the amount of the depression of said accelerator pedal; and (b) when an on state of the starter for the diesel engine is detected; immediately determining said fuel injection rate at a predetermined value of injection for a second predetermined period of time regardless of said engine rotational speed and said amount of depression of the accelerator pedal.
Claim 6
Dependent Claim
31 words
A method for controlling of a diesel engine as set forth in claim 3, wherein said second predetermined period of time is determined for increasing the rotational speed of the engine.
Claim 7
Independent Claim
207 words
A method for controlling a diesel engine wherein a fuel injection rate of a fuel injection pump is electronically determined in accordance with an engine rotational speed detected by an engine rotational speed sensor means and an amount of depression of an accelerator pedal, said engine rotational speed sensor means generating pulses proportional to the engine rotational speed, the fuel injection rate increasing as the engine rotational speed decreases under a fixed amount of depression of the accelerator pedal, and the fuel injection rate increasing as the amount of depression of the accelerator pedal increases, said method comprising the steps of: detecting an off state of a starter for the diesel engine; monitoring the generation of said pulses to detect a failure of said engine rotational speed sensor means, said failure being detected when no pulse is generated after a predetermined time has been elapsed, the predetermined time commencing when the off state of the starter is detected; generating an abnormal signal indicative of said failure of said engine rotational speed sensor means; and once the abnormal signal is generated and the off state of the starter are detected, determining said fuel injection rate at zero regardless of the amount of the depression of said accelerator pedal.
Claim 8
Independent Claim
207 words
A method for controlling a diesel engine wherein a fuel injection rate of a fuel injection pump is electronically determined in accordance with an engine rotational speed detected by an engine rotational speed sensor means and an amount of depression of an accelerator pedal, said engine rotational speed sensor means generating pulses proportional to the engine rotational speed, the fuel injection rate increasing as the engine rotational speed decreases under a fixed amount of depression of the accelerator pedal, and the fuel injection rate increasing as the amount of depression of the accelerator pedal increases, said method comprising the steps of: detecting an off state of a starter for the diesel engine; monitoring the generation of said pulses to detect a failure of said engine rotational speed sensor means, said failure being detected when no pulse is generated after a predetermined time has been elapsed, the predetermined time commencing when the off state of the starter is detected; generating an abnormal signal indicative of said failure of said engine rotational speed sensor means; and once the abnormal signal is generated and the off state of the starter are detected, determining said fuel injection rate at zero regardless of the amount of the depression of said accelerator pedal.
Claim 9
Independent Claim
234 words
A method for controlling a diesel engine wherein a fuel injection rate is electronically determined in accordance with an engine rotational speed detected by an engine rotational speed sensor means and an amount of depression of an accelerator pedal, the engine rotational speed sensor means generating pulses directly proportional to the engine rotational speed, said method comprising the steps of: feeding fuel to the diesel engine at a fuel injection rate; adjusting the fuel injection rate in response to the engine rotational speed and the amount of depression of the accelerator pedal, the fuel injection rate increasing as the engine rotational speed decreases for a fixed amount of depression of the accelerator pedal, and the fuel injection rate increasing as the amount of depression of the accelerator pedal increases; detecting an off state of a starter for the diesel engine; monitoring the generation of said pulses to detect a failure of said engine rotational speed sensor means, said failure being detected when no pulse is generated after a predetermined time has elapsed, the predetermined time commencing when the off state of the starter is detected; generating an abnormal signal indicative of said failure of said engine rotational speed sensor means; and once the abnormal signal is generated and the off state of the starter are detected, determining said fuel injection rate at zero regardless of the amount of the depression of said accelerator pedal.
Claim 10
Independent Claim
234 words
A method for controlling a diesel engine wherein a fuel injection rate is electronically determined in accordance with an engine rotational speed detected by an engine rotational speed sensor means and an amount of depression of an accelerator pedal, the engine rotational speed sensor means generating pulses directly proportional to the engine rotational speed, said method comprising the steps of: feeding fuel to the diesel engine at a fuel injection rate; adjusting the fuel injection rate in response to the engine rotational speed and the amount of depression of the accelerator pedal, the fuel injection rate increasing as the engine rotational speed decreases for a fixed amount of depression of the accelerator pedal, and the fuel injection rate increasing as the amount of depression of the accelerator pedal increases; detecting an off state of a starter for the diesel engine; monitoring the generation of said pulses to detect a failure of said engine rotational speed sensor means, said failure being detected when no pulse is generated after a predetermined time has elapsed, the predetermined time commencing when the off state of the starter is detected; generating an abnormal signal indicative of said failure of said engine rotational speed sensor means; and once the abnormal signal is generated and the off state of the starter are detected, determining said fuel injection rate at zero regardless of the amount of the depression of said accelerator pedal.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-28 | 1990-01-27 | 1990-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-28 | 1994-01-27 | 1994-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-28 | 1998-01-27 | 1998-07-29 | $7700.00 | Window Closed / Lapsed |