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| Method for analyzing the driving behavior of motor vehicles |
| OF THE PREFERRED EMBODIMENTS The system 1 is installed in the vehicle being tested where it will ... |
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| Vehicular black box monitoring system |
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| Method and system for condition monitoring of vehicles |
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| Vehicle tracking unit with fault condition diagnosis and related methods |
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| Method for managing construction machine, and arithmetic processing apparatus |
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Control strategy for diesel engine auxiliary loads to reduce emissions during engine power level changes
| Details |
Inventors: Dillen, Eric Richard; Gallagher, Shawn Michael; Shilling, Norman Zethward;
Assignee: General Electric Company (Schenectady, NY)
Primary Examiner: Cuchlinski, Jr.; William A.
Assistant Examiner: Gibson; Eric M
Attorney, Agent or Firm: Rowold; Carl A., DeAngelis, Jr.; John L. Beusse Brownlee Wolter Mora & Maire, P.A.
A diesel locomotive includes a number of auxiliary subsystems operating in conjunction with the locomotive diesel engine and deriving their energy, from the diesel engine. Included among the subsystems are various cooling systems, the battery charging system, and the electrical generation system, comprising one or more alternators drivingly coupled to the engine shaft. Each of the subsystems includes a component that is activated when one or more operational conditions associated with the subsystem are met. For instance, an engine cooling system fan motor is activated when the coolant temperature exceeds a predetermined value. Similarly, a battery charger is activated when the battery voltage falls below a predetermined value, and an alternator blower is activated when the main or auxiliary alternator temperature exceeds a predetermined value. The activation of these power consuming auxiliary devices while the diesel engine is transitioning from a first load state to a higher load state, causes the formation of excessive smoke emissions. According to the present invention, the activation of these auxiliary components is delayed until the diesel engine has reached steady-state operation, after which the elements are activated as required. Also, in the event a subsystem operational parameter exceeds a predetermined critical limit, the auxiliary device is immediately activated, even if the diesel engine is in a transition state to a higher load value. |
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DETAILED DESCRIPTION The present invention provides improved control over the auxiliary loads, i.
e.
over the auxiliary power demand of a diesel engine during notch or throttle position changes that command a higher engine output.
During load increases, the engine demands more fuel.
But, because the air handling system lags the delivery of the increased fuel, the optimum air-to-fuel ratio that provides complete combustion of the fuel is not maintained.
Additional simultaneous load demands by an auxiliary component (e.
g.
the air brake system compressor, radiator fan or motor fan blowers) further increase the engine load, causing the formation of additional smoke and particulates.
The auxiliary control system according to the present invention monitors, screens and prioritizes the application of additional auxiliary loads and when possible, defers the application until the load increase demand on the engine due to the throttle position change has been satisfied, i.
e.
, the engine has reached steady-state operation at the new load value.
The prioritization scheme is based on the operating condition of the engine and the specific auxiliary load requesting activation.
Also, if operating conditions do not permit deferral of the additional auxiliary load, then the auxiliary loads are sequentially switched on and off to avoid a situation where several auxiliary loads simultaneously demand additional power from the diesel engine.
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