US 7,127,346 B1 · Dynamic engine pumping work estimation algorithm

Abstract

An engine control system that regulates operation of an engine includes an intake valve that regulates air intake into a cylinder of the engine and an exhaust valve that regulates exhaust from the cylinder. A control module determines a cylinder volume at intake valve closure and a cylinder volume at intake valve opening and calculates an intake pumping torque based on the cylinder volume at intake valve closure and the cylinder volume at intake valve opening. The control module determines a cylinder volume at exhaust valve closure and a cylinder volume at exhaust valve opening and calculates an exhaust pumping torque based on the cylinder volume at exhaust valve closure and the cylinder volume at exhaust valve opening. The control module calculates a net pumping torque based on the intake pumping torque and the exhaust pumping torque and regulates engine operation based on the net pumping torque.

Claims19

Dependent claims

An engine control system that regulates operation of an engine, comprising:

an intake valve that regulates air intake into a cylinder of said engine;
an exhaust valve that regulates exhaust from said cylinder;
and
a control module that determines a cylinder volume at intake valve closure and a cylinder volume at intake valve opening, that calculates an intake pumping torque based on said cylinder volume at intake valve closure and said cylinder volume at intake valve opening, that determines a cylinder volume at exhaust valve closure and a cylinder volume at exhaust valve opening, that calculates an exhaust pumping torque based on said cylinder volume at exhaust valve closure and said cylinder volume at exhaust valve opening, that calculates a net pumping torque based on said intake pumping torque and said exhaust pumping torque and that regulates engine operation based on said net pumping torque.

1 more element

A method of dynamically regulating operation of an internal combustion engine, comprising:

monitoring an intake camshaft angle;
determining a cylinder volume at intake valve closure and a cylinder volume at intake valve opening based on said intake camshaft angle;
calculating an intake pumping torque based on said cylinder volume at intake valve closure and said cylinder volume at intake valve opening;
monitoring an exhaust camshaft angle;
determining a cylinder volume at exhaust valve closure and a cylinder volume at exhaust valve opening based on said exhaust camshaft angle;
calculating an exhaust pumping torque based on said cylinder volume at exhaust valve closure and said cylinder volume at exhaust valve opening;
calculating a net pumping torque based on said intake pumping torque and said exhaust pumping torque;
and
regulating engine operation based on said net pumping torque.

6 more elements

Dependencies are inferred from the claim text.

Dynamic engine pumping work estimation algorithm

Life of this patent

Dynamic engine pumping work estimation algorithm

Life of this patent

Abstract

Claims19