Engine ignition control apparatus
AssigneeHonda Motor Co., Ltd.
InventorsYukihiro Asada, Kenichi Machida
Life of this patent
Estimating the term…
Abstract
When cranking starts by turning on a starter switch 14, the ignition timing is first corrected to a fixed value on a retard side. When an IACV 6 reaches a fully opened position, the ignition timing is corrected to the retard side once, and thereafter corrected to an advance side. The correction to the advance side is performed in accordance with a difference between the number of idling target steps and the current number of steps, and the amount of advance correction is reduced as the difference is reduced. Upon completion of the initialization of the IACV 6, the ignition timing correction amount is then restored to the initial value by increasing the amount of advance by a predetermined amount in a stepwise manner.
Claims13
An engine ignition control apparatus, comprising:
- an ignition timing correction unit,
- the engine ignition control apparatus configured to control an idle air control valve (IACV), provided to a bypass passage bypassing a throttle valve, to reach a fully-opened position in full-open initial processing,
- wherein a first period from when an ignition switch is turned on until the opening degree of the IACV reaches a full opening degree includes a period during which a normal ignition timing is maintained, and thereafter a second period during which ignition timing correction is performed by switching the normal ignition timing to a fixed ignition timing on a retard side,
- the ignition timing correction unit configured to
- calculate a proportional function for an ignition timing correction value with respect to the opening degree when the opening degree of the IACV reaches the full opening degree;
- calculate the ignition timing correction value by use of the proportional function in accordance with a difference between an idling target opening degree and the current opening degree;
- and
- correct the ignition timing to an advance side until the opening degree of the IACV reaches the idling target opening degree.
A method, comprising:
- calculating, by an ignition timing correction unit, a proportional function for an ignition timing correction value with respect to when an opening degree of an idle air control valve (IACV) reaches the full opening degree;
- calculating, by the ignition timing correction unit, the ignition timing correction value by use of the proportional function in accordance with a difference between an idling target opening degree and a current opening degree;
- and
- correcting, by the ignition timing correction unit, the ignition timing to an advance side until the opening degree of the IACV reaches the idling target opening degree.
An apparatus, comprising:
- an engine controller comprising:
- calculating means for calculating a proportional function for an ignition timing correction value with respect to when an opening degree of an idle air control valve (IACV) reaches the full opening degree;
- calculating means for calculating the ignition timing correction value by use of the proportional function in accordance with a difference between an idling target opening degree and a current opening degree;
- and
- correcting means for correcting the ignition timing to an advance side until the opening degree of the IACV reaches the idling target opening degree.
An engine ignition control apparatus, comprising:
- a calculating unit configured to calculate a proportional function for an ignition timing correction value with respect to when an opening degree of an idle air control valve (IACV) reaches the full opening degree;
- a calculating unit configured to calculate the ignition timing correction value by use of the proportional function in accordance with a difference between an idling target opening degree and a current opening degree;
- and
- a correcting unit configured to correct the ignition timing to an advance side until the opening degree of the IACV reaches the idling target opening degree.
Dependencies are inferred from the claim text.