Internal-combustion engines – Charge forming device – Crankcase vapor used with combustible mixture
Patent
1994-09-14
1996-04-02
Wolfe, Willis R.
Internal-combustion engines
Charge forming device
Crankcase vapor used with combustible mixture
318696, F02M 2507, H02P 800
Patent
active
055031315
ABSTRACT:
An exhaust gas recirculation control system includes a stepping motor driven valve for controlling the flow rate of exhaust gas through a recirculation pipe of an internal combustion engine, and arithmetic circuitry for calculating the exhaust gas recirculation flow rate in dependence on the operating state of the engine. A two-phase excitation driving scheme and a one/two-phase excitation driving scheme are exchangeably adopted for driving the stepping motor to control the opening of the recirculation control valve. When a rapid response is required, the two-phase excitation driving scheme is put into effect, with the one/two-phase excitation driving scheme being adopted when high resolution is required.
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Mitsubishi Denki & Kabushiki Kaisha
Wolfe Willis R.
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