Engine control apparatus

Details Engine control apparatus Engine control apparatus

1985-05-21

1987-06-09

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Fuel injection system

123488, 123494, 36443105, F02D 4118

Patent

active

046712429

ABSTRACT:
An engine control apparatus has an air flow rate measuring device for measuring an intake air flow rate. A temperature sensing element having a temperature characteristic and constituting the device is arranged in an intake pipe. The device generates an output pulse signal having a pulse width T corresponding to the intake air flow rate. An engine control unit has the one-dimensional map for storing the relationship between the engine speed N and the pulse width to of the signal corresponding to the air flow rate. This data to is read out from the one-dimensional map in accordance with the engine speed N. Subsequently, the data to is subtracted from the data T to calculate a time duration t. The unit also has a two-dimensional map for storing the relationship between each time duration t and the corresponding rate G/N in correspondence with each of the present engine speeds. A corresponding rate G/N is read out from the two-dimensional map in response to the calculated time duration t. The resultant rate G/N is used to calculate fuel injection quantity.

REFERENCES:
patent: 3969614 (1976-07-01), Moyer et al.
patent: 4058089 (1977-11-01), Schmidt et al.
patent: 4089214 (1978-05-01), Egami et al.
patent: 4304129 (1981-12-01), Kawai et al.
patent: 4476831 (1984-10-01), Shinoda et al.

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