US4512307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel quantity control apparatus of supercharged diesel engine with safety measures
Assignee: Toyota Motor Corp
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Filing: 1982-07-15
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Granted: 1985-04-23
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Expires: 2002-07-15
Abstract
Abstract A fuel quantity control apparatus of a supercharged diesel engine with safety measures comprises a fuel injection pump capable of increasing the fuel quantity according to the degree of supercharging, a detector for detecting the temperature in a combustion chamber or the temperature of the exhaust gas, a control circuit receiving an output of the detector, and a three-way valve driven by the control circuit to control the amount of the increase of the fuel quantity. Through the use of the apparatus when the detected temperature reaches a predetermined abnormal temperature, the amount of increase of the fuel quantity can be made zero or decreased and accidents such as melting or damage of the engine by abnormal rise of the temperature in the combustion chamber or of the temperature of the exhaust gas can be prevented.
Inventors
- 👤 Toshihiko Igashira
- 👤 Hisasi Kawai
- 👤 Takeshi Tanaka
- 👤 Kenzi Iwamoto
- 👤 Seiko Abe
- 👤 Eiji Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:05
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/0002; F02D41/0007; F02D1/00; F02D1/02; F02D1/025; F02D1/06; F02D1/065; F02D17/00; F02D17/04; F02D23/00; F02D23/02; F02D41/22; F02M; F02M59/00; F02M59/44; F02M59/447; F02B; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
139 words
A fuel quantity control apparatus for a supercharged diesel engine, having a glow plug, an electric circuit for preheating the glow plugs and a fuel injection pump capable of increasing the fuel quantity according to the degree of supercharging, said apparatus comprising: means for detecting at least an abnormal temperature by measuring the electric resistance of the glow plug using a bridge circuit including a diode provided to electrically separate said bridge circuit from said electric circuit for the preheating of the glow plug, a control circuit for receiving the output of the detection means, and a three-way valve driven by the control circuit and for controlling the amount of increase of the fuel quantity, whereby when the abnormal temperature is detected by the detection means, the amount of increase of the fuel quantity is made zero or decreased.
Claim 2
Dependent Claim
139 words
A fuel quantity control apparatus for a supercharged diesel engine, having a glow plug, an electric circuit for preheating the glow plugs and a fuel injection pump capable of increasing the fuel quantity according to the degree of supercharging, said apparatus comprising: means for detecting at least an abnormal temperature by measuring the electric resistance of the glow plug using a bridge circuit including a diode provided to electrically separate said bridge circuit from said electric circuit for the preheating of the glow plug, a control circuit for receiving the output of the detection means, and a three-way valve driven by the control circuit and for controlling the amount of increase of the fuel quantity, whereby when the abnormal temperature is detected by the detection means, the amount of increase of the fuel quantity is made zero or decreased.
Claim 3
Dependent Claim
45 words
An apparatus as set forth in claim 1, wherein the fuel injection pump is provided with a boost compensator and the three-way valve is an electromagnetic three-way valve capable of releasing a part of all of the intake air pressure introduced into the boost compensator.
Claim 4
Dependent Claim
37 words
An apparatus as set forth in claim 1, wherein when the supply of the electric current to the glow plug for heating is completed, the control circuit starts to detect the electric resistance of the glow plug.
Claim 5
Dependent Claim
36 words
An apparatus as claimed in claim 2, wherein when the supply of the electric current to the glow plug for heating is completed, the control circuit starts to detect the electric resistance of the glow plug.
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) | 1988-04-22 | 1988-10-22 | 1989-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-22 | 1992-10-22 | 1993-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-22 | 1996-10-22 | 1997-04-23 | $7700.00 | Window Closed / Lapsed |