US5732676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and system for engine control
Assignee: Detroit Diesel Corp
•
Filing: 1995-05-15
•
Granted: 1998-03-31
•
Expires: 2015-05-15
Abstract
Abstract A method for comprehensive integrated control of an internal combustion engine, such as a compression-ignition engine, utilizing an electronic control module (20) is disclosed. The control strategy integrates various functions of engine control including an acceleration balance test for the engine cylinders, a fuel economy vehicle speed limit adder, a fueling limit for high altitude vehicle operation, throttle logic, a data-hub for operation trending and vehicle component lifing analyses, a gear ratio torque limit, an air temperature based torque limit, enhanced cooling fan control, and an idle shutdown strategy based on ambient air temperature.
Inventors
- 👤 S. Miller Weisman
- 👤 Dennis M. Letang
- 👤 Douglas J. Babcock
- 👤 Arnold J. VanderBok
- 👤 Eric D. Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:59
CPC Classifications
F; F02; F02D; F02D43/00; B; B60; B60K; B60K31/00; B60K31/02; B60K31/04; B60K31/042; B60K31/045; B60K31/047; B60W; B60W30/00; B60W30/14; B60W30/143; B60W30/146; F01; F01P; F01P7/00; F01P7/02; F01P7/08; F02D11/00; F02D11/06; F02D11/10; F02D11/106; F02D17/00; F02D17/04; F02D37/00; F02D41/00; F02D41/0002; F02D41/0007; F02D41/008; F02D41/0085; F02D41/0087; F02D41/02; F02D41/021; F02D41/0215; F02D41/0225; F02D41/04; F02D41/042; F02D41/14; F02D41/1497; F02D41/22; F02D41/24; F02D41/26; F02D41/30; F02D41/38; B60W50/00; B60W2050/0001; B60W2050/0019; B60W2050/0042; B60W2050/0043; B60W2050/0052; B60W2510/00; B60W2510/06; B60W2510/0638; B60W2555/00; B60W2555/20; B60W2710/00; B60W2710/06; B60W2710/0666; F01P2025/00; F01P2025/08; F01P2025/13; F01P2025/40; F01P2031/00; F01P2060/00; F01P2060/06; F02D11/105; F02D41/1401; F02D2041/1413; F02D2041/1432; F02D2200/00; F02D2200/02; F02D2200/04; F02D2200/0414; F02D2200/06; F02D2200/0625; F02D2200/10; F02D2200/1002; F02D2200/70; F02D2200/703; F02D2250/00; F02D2250/16; F02D2250/18; F02D2250/26; F16; F16H; F16H63/00; F16H63/40; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y02T10/40; Y02T10/80; Y02T10/84
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
69 words
A method for limiting idling time of an internal combustion engine in a vehicle having an electronic control module for controlling the internal combustion engine, the method comprising: determining a value representative of ambient air temperature; and automatically disabling continued operation of the internal combustion engine when the value representative of ambient air temperature is within a range determined by selectable upper and lower ambient air temperature limit values.
Claim 2
Independent Claim
69 words
A method for limiting idling time of an internal combustion engine in a vehicle having an electronic control module for controlling the internal combustion engine, the method comprising: determining a value representative of ambient air temperature; and automatically disabling continued operation of the internal combustion engine when the value representative of ambient air temperature is within a range determined by selectable upper and lower ambient air temperature limit values.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein the step of determining comprises estimating the ambient air temperature.
Claim 4
Dependent Claim
40 words
The method of claim 1 wherein the step of determining comprises estimating the ambient air temperature based on at least one member of the group consisting of engine oil temperature, engine speed, and air inlet temperature or manifold air temperature.
Claim 5
Dependent Claim
83 words
The method of claim 1 wherein the step of determining comprises estimating the ambient air temperature according to: ##EQU8## where T AATP represents estimated ambient air temperature, temp is a temporary storage variable, T air represents one of manifold air temperature and air inlet temperature, T oil represents engine oil temperature, RPM represents engine speed, K E is a scaling factor, T aoff is an ambient air temperature offset, Fan off is a cooling fan offset, and K F is a filter constant.
Claim 6
Dependent Claim
26 words
The method of claim 1 wherein the step of automatically disabling continued operation of the internal combustion engine is performed only when the vehicle is stationary.
Claim 7
Dependent Claim
19 words
The method of claim 5 wherein a stationary vehicle is indicated only when a vehicle parking brake is set.
Claim 8
Dependent Claim
39 words
The method of claim 1 further comprising: providing a warning indicative of impending disablement of the internal combustion engine for a predetermined period of time prior to the step of automatically disabling continued operation of the internal combustion engine.
Claim 9
Dependent Claim
37 words
The method of claim 7 further comprising: detecting an operator override while providing the warning so as to delay the step of automatically disabling continued operation of the internal combustion engine for a second period of time.
Claim 10
Dependent Claim
68 words
The method of claim 8 further comprising: detecting an attempt to defeat an ambient temperature sensor when the temperature sensor indicates an ambient temperature in excess of a high ambient temperature limit value for a third period of time; and disabling the operator override while the attempt to defeat the ambient temperature sensor is detected so as to enable automatically disabling continued operation of the internal combustion engine.
Claim 11
Independent Claim
96 words
A method for limiting idling time of an internal combustion engine of a vehicle having an electronic control module for controlling the engine and a parking brake for maintaining the vehicle in a stationary condition, the method comprising: determining that the vehicle is stationary as indicated by the parking brake being engaged; determining a value representative of ambient air temperature; and automatically shutting down the internal combustion engine when the value representative of ambient air temperature is within a range determined by selectable upper and lower ambient air temperature limit values for a first time period.
Claim 12
Independent Claim
96 words
A method for limiting idling time of an internal combustion engine of a vehicle having an electronic control module for controlling the engine and a parking brake for maintaining the vehicle in a stationary condition, the method comprising: determining that the vehicle is stationary as indicated by the parking brake being engaged; determining a value representative of ambient air temperature; and automatically shutting down the internal combustion engine when the value representative of ambient air temperature is within a range determined by selectable upper and lower ambient air temperature limit values for a first time period.
Claim 13
Dependent Claim
46 words
The method of claim 10 wherein the vehicle further includes an ambient air temperature sensor in communication with the electronic control module and wherein the step of determining a value representative of ambient air temperature comprises monitoring a signal produced by the ambient air temperature sensor.
Claim 14
Dependent Claim
20 words
The method of claim 10 wherein the step of determining a value comprises computing an estimate of ambient air temperature.
Claim 15
Dependent Claim
43 words
The method of claim 10 wherein the step of determining a value comprises computing an estimate for ambient air temperature based on at least one of the members of the group consisting of manifold air temperature, air inlet temperature, and engine oil temperature.
Claim 16
Dependent Claim
25 words
The method of claim 10 wherein the upper and lower ambient air temperature limits have values corresponding to about 80° F. and 40° F., respectively.
Claim 17
Independent Claim
89 words
A system for limiting idling time of an electronically controlled internal combustion engine in a vehicle, the system comprising: a memory for storing a predetermined set of instructions and calibration values; a processor in communication with the memory, the processor being operative to determine a value representative of ambient air temperature, and to automatically disable continued operation of the internal combustion engine when the value representative of ambient air temperature is within a range determined by selectable upper and lower ambient air temperature limit values stored in the memory.
Claim 18
Independent Claim
89 words
A system for limiting idling time of an electronically controlled internal combustion engine in a vehicle, the system comprising: a memory for storing a predetermined set of instructions and calibration values; a processor in communication with the memory, the processor being operative to determine a value representative of ambient air temperature, and to automatically disable continued operation of the internal combustion engine when the value representative of ambient air temperature is within a range determined by selectable upper and lower ambient air temperature limit values stored in the memory.
Claim 19
Dependent Claim
16 words
The system of claim 15 wherein the processor is operative to estimate the ambient air temperature.
Claim 20
Dependent Claim
40 words
The system of claim 15 wherein the processor is operative to estimate the ambient air temperature based on at least one member of the group consisting of engine oil temperature, engine speed, and air inlet temperature or manifold air temperature.
Claim 21
Dependent Claim
86 words
The system of claim 15 wherein the processor is operative to estimate the ambient air temperature according to: ##EQU9## where T AATP represents estimated ambient air temperature, temp is a temporary variable stored in the memory, T air represents one of manifold air temperature and air inlet temperature, T oil represents engine oil temperature, RPM represents engine speed, K E is a scaling factor, T aoff is an ambient air temperature offset, Fan off is a cooling fan offset, and K F is a filter constant.
Claim 22
Dependent Claim
47 words
The system of claim 15 wherein the processor is further operative to provide a warning for a predetermined period of time prior to the step of automatically disabling continued operation of the internal combustion engine, the warning being indicative of impending disablement of the internal combustion engine.
Claim 23
Independent Claim
68 words
A method for controlling an internal combustion engine in a vehicle including a transmission connected to the engine and having a transmission retarder, the vehicle also including a radiator containing engine coolant for cooling the engine during operation and a cooling fan for increasing cooling rate of the engine coolant and engine components, the method comprising: operating the cooling fan based on an anticipated engine coolant temperature increase.
Claim 24
Independent Claim
68 words
A method for controlling an internal combustion engine in a vehicle including a transmission connected to the engine and having a transmission retarder, the vehicle also including a radiator containing engine coolant for cooling the engine during operation and a cooling fan for increasing cooling rate of the engine coolant and engine components, the method comprising: operating the cooling fan based on an anticipated engine coolant temperature increase.
Claim 25
Dependent Claim
36 words
The method of claim 20 wherein the step of operating the cooling fan comprises: operating the cooling fan based on the engine coolant obtaining a predetermined minimum temperature and an operational state of the transmission retarder.
Claim 26
Dependent Claim
33 words
The method of claim 21 wherein the step of operating the cooling fan includes operating the cooling fan when the engine coolant exceeds a predetermined minimum temperature and the transmission retarder is engaged.
Claim 27
Dependent Claim
42 words
The method of claim 20 wherein the step of operating the cooling fan comprises: determining requested engine output torque based on current engine operating conditions; and anticipating a coolant temperature increase based on the requested engine output torque and current air temperature.
Claim 28
Dependent Claim
71 words
The method of claim 20 wherein the step of operating the cooling fan comprises: determining requested engine output torque based on current engine operating conditions; anticipating a coolant temperature increase based on the requested engine output torque and current air temperature, wherein the cooling fan is operated only when the requested engine output torque exceeds a predetermined minimum torque value and the current air temperature exceeds a predetermined minimum coolant temperature.
References Cited (Backward Citations)
US1239523A
Cited
US2627254A
Cited
US3439655A
Cited
US4022165A
Cited
US3569724A
Cited
US3827419A
Cited
US4006723A
Cited
US4186693A
Cited
US4367706A
Cited
US4286683A
Cited
US4671232A
Cited
US4482812A
Cited
US4421075A
Cited
US4425766A
Cited
US4419866A
Cited
US4534326A
Cited
US4697561A
Cited
US4711209A
Cited
US4766863A
Cited
US4782803A
Cited
US4943923A
Cited
US4745898A
Cited
US5003483A
Cited
US4878465A
Cited
US4936277A
Cited
US5046007A
Cited
US5054445A
Cited
US5117793A
Cited
US5278760A
Cited
US5019986A
Cited
US5287282A
Cited
US5103785A
Cited
US5072703A
Cited
US5263453A
Cited
US5156128A
Cited
US5265575A
Cited
US5203423A
Cited
US5243523A
Cited
US5165373A
Cited
US5261374A
Cited
US5235512A
Cited
US5385129A
Cited
US5140826A
Cited
US5331933A
Cited
US5186015A
Cited
US5307644A
Cited
US5386810A
Cited
US5222469A
Cited
US5343780A
Cited
US5275011A
Cited
US5445128A
Cited
US5317998A
Cited
US5481909A
Cited
US5469826A
Cited
US5477827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-03-30 | 2001-09-29 | 2002-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-03-30 | 2005-09-29 | 2006-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-03-30 | 2009-09-29 | 2010-03-31 | $7700.00 | Window Closed / Lapsed |