Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1995-05-18
1996-04-02
Wolfe, Willis R.
Internal-combustion engines
Charge forming device
Fuel injection system
123571, F02D 1702, F02M 2507
Patent
active
055031293
ABSTRACT:
An apparatus for determining a number of cylinders to operate in a variable displacement engine includes a signal representative of air charge temperature, a signal representative of barometric pressure, a desired mass air flow evaluator, a maximum mass air flow evaluator, a desired exhaust gas recirculation flow evaluator, a maximum exhaust gas recirculation flow evaluator, and a controller. The controller compares the desired mass air flow to the maximum mass air flow, generating a mass air flow error signal if desired mass air flow error exceeds maximum mass air flow error. The controller also compares the desired exhaust gas recirculation flow to the maximum exhaust gas recirculation flow, generating an exhaust gas recirculation flow error signal if desired exhaust gas recirculation flow exceeds maximum exhaust gas recirculation flow. The two flow error signals are combined and compared to an acceptable error threshold, and a number of cylinders upon which to operate the variable displacement engine is recommended responsive thereto.
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Hieb Bradley J.
Robichaux Jerry D.
Dixon Richard D.
Ford Motor Company
May Roger L.
Wolfe Willis R.
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