Patent ID: 6880523

Claim:
An engine cylinder induction air quantity measuring apparatus for an engine provided with a throttle valve controlled independently from driver's accelerator operation, the engine cylinder induction air quantity measuring apparatus comprising: an intake air quantity sensing section to sense an intake air quantity of air drawn into an intake system of the engine; an intake manifold inside air quantity calculating section to calculate an intake manifold inside air quantity of air in an intake manifold of the engine, from the intake air quantity by performing a balance calculation to calculate a balance between an intake manifold inflow air quantity of air flowing into the intake manifold, and an intake manifold outflow air quantity of air flowing out of the intake manifold; a cylinder induction air quantity calculating section to calculate a cylinder induction air quantity of air inducted into a cylinder section of the engine in accordance with the intake manifold inside air quantity; and an engine stop mode throttle controlling section to control a throttle opening of the throttle valve to a predetermined stop mode opening greater than an idling mode opening for an idle operation of the engine, in an engine stopping process to stop the engine.