Engine stop/start control apparatus
AssigneeDenso Corporation
InventorShogo HOSHINO
Life of this patent
Estimating the term…
Abstract
An ECU makes an opening degree of a throttle valve larger than an opening degree in an idle rotating state of an engine in a rotation drop period during which engine speed drops to zero after combustion of the engine is stopped. Further, the ECU determines that the engine speed is within a predetermined rotation speed range including at least a resonance range of the engine in the rotation drop period, and, in the case where it is determined that the engine speed is within the predetermined rotation speed range, the ECU performs rotation drop processing of temporarily increasing a drop rate of the engine speed.
Claims7
An engine stop/start control apparatus which is applied to an engine in which a throttle valve is provided to an intake part, and which automatically stops the engine in association with fulfillment of a predetermined automatic stop condition, and, thereafter restarts the engine in association with fulfillment of a predetermined restart condition, the engine stop/start control apparatus comprising:
- a throttle control section configured to maintain an opening degree of the throttle valve larger than an opening degree in an idle rotating state of the engine in a rotation drop period until engine speed drops to zero after combustion of the engine is stopped;
- a resonance range determining section configured to determine that the engine speed is within a predetermined rotation speed range including at least a resonance range of the engine in the rotation drop period;
- and
- a rotation drop control section configured to, in a case where it is determined that the engine speed is within the predetermined rotation speed range, perform rotation drop processing of temporarily increasing a drop rate of the engine speed.
Dependencies are inferred from the claim text.