Measurement of engine cylinder induction air quantity
First Claim
1. 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.
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Abstract
An engine cylinder induction air quantity measuring apparatus includes a controller to calculate an intake manifold inside air quantity of air in an intake manifold of the engine, from a sensed 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. In an engine stopping process to stop the engine, the controller controls a throttle opening of a throttle valve to a predetermined stop mode opening greater than an idling mode opening for an idle operation of the engine.
10 Citations
16 Claims
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1. 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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An engine cylinder induction air quantity measuring process for an engine provided with a throttle valve controlled independently from driver'"'"'s accelerator operation, the engine cylinder induction air quantity measuring process comprising:
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calculating an intake manifold inside air quantity, from a sensed intake air quantity of an engine, by performing a balance calculation to calculate a balance between an intake manifold inflow air quantity, and an intake manifold outflow air quantity, and calculating a cylinder induction air quantity from the intake manifold inside air quantity; and
controlling 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.
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16. 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:
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means for calculating an intake manifold inside air quantity by calculating a balance between an intake manifold inflow air quantity which is the mass of air flowing into an intake manifold of an engine and which is determined from an air flow rate sensed on an upstream side of the intake manifold, and an intake manifold outflow air quantity which is the mass of air flowing out of the intake manifold into a cylinder section of the engine, and calculating a cylinder induction air quantity from the intake manifold inside air quantity; and
means for controlling 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.
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Specification