Control device for diesel engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorKouseki SUGIYAMA
Life of this patent
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Abstract
When a diesel engine is determined to be in a motoring state, a hysteresis zero angle H0 is determined (step S14). Subsequently, a gradient dn is calculated (step S16). The gradient dn is calculated based on data (θn, Δhn) of a deviation Δhn at a retardation side from the hysteresis zero angle H0 and at an advance side from a predetermined crank angle. Subsequently, the gradient dn and the hysteresis zero angle H0 are updated (step S18). When the diesel engine is determined to be in a non-motoring state, data (θn, Pn) of an actual in-cylinder pressure is corrected based on a newest correction coefficient η and hysteresis zero angle H0 (step S22).
Claims7
A control device for a diesel engine which is configured to control a diesel engine including a glow plug integrated type in-cylinder pressure sensor,
- wherein the control device is configured to:
- determine a crank angle at which a difference, which is obtained by subtracting a reference in-cylinder pressure at a crank angle at which an actual in-cylinder pressure is detected, from the actual in-cylinder pressure detected by the in-cylinder pressure sensor at each of predetermined crank angles in a cycle in which the diesel engine is in a motoring state, changes from negative to positive;
- calculate a rate of change of a pressure difference between the actual in-cylinder pressure and the reference in-cylinder pressure in a predetermined crank angle region at a retardation side from the crank angle at which the difference changes from negative to positive;
- and
- correct the actual in-cylinder pressure detected at each of the predetermined crank angles in the cycle in which the diesel engine is in the non-motoring state, based on a crank angle interval from the crank angle at which the actual in-cylinder pressure is detected to the crank angle at which the difference changes from negative to positive, and the rate of change.
Dependencies are inferred from the claim text.