| CPC F02D 41/3094 (2013.01) [F02D 37/02 (2013.01)] | 8 Claims |
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1. A control device for controlling an engine, the control device comprising:
main-chamber injecting means that supplies a main chamber with fuel;
sub-chamber injecting means that supplies a sub chamber with fuel after the main chamber injecting means supplies the fuel;
estimating means that estimates a degree of knocking serving as indices of an intensity of the knocking and an occurrence frequency of the knocking, a higher degree of knocking being determined that an intensity of the knocking is higher or that an occurrence frequency of the knocking is higher;
fuel controlling means that carries out fuel control that reduces a sub-chamber fuel amount representing an amount of fuel supplied by the sub-chamber injecting means;
an ignition plug disposed inside the sub-chamber to ignite an air-fuel mixture in the sub-chamber; and
ignition controlling means that carries out ignition control that retards an ignition timing of the ignition plug, wherein
when the degree of the knocking is a first predetermined value or more, the fuel controlling means carries out the fuel control and the ignition controlling means does not carry out the ignition control,
after the fuel control is carried out by the fuel controlling means, if the degree of the knocking is still the first predetermined value or more, the ignition controlling means carries out the ignition control, and
after the fuel control is carried out by the fuel controlling means, if the degree of the knocking is less than the first predetermined value, the fuel controlling means stop the fuel control and the ignition controlling means does not carry out the ignition control.
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