Method of controlling an internal combustion engine
AssigneeDetroit Diesel Corporation
InventorEric D. Thomas
Life of this patent
Estimating the term…
Abstract
A method of controlling an internal combustion engine includes determining the pressure within the cylinder with a pressure sensor which samples at specific positions of the piston indicating the properties of the thermodynamic cycle. The engine is controlled and operating condition diagnosed in real time based on that series of cylinder pressures at corresponding piston positions.
Claims16
An internal combustion engine comprising:
- an engine block defining a plurality of cylinders;
- a plurality of pistons with a piston received in each cylinder;
- a plurality of pressure sensors with a pressure sensor configured at each cylinder to detect cylinder pressure;
- a crankshaft having an encoder, the crankshaft driving the pistons;
- a crankshaft sensor for detecting a position of the crankshaft, allowing determination of the position of each piston within its cycle;
- and
- a controller configured to determine a pressure within each cylinder and the position of each corresponding piston within its cycle, and further configured to control the engine in real time based on a series of cylinder pressures and corresponding piston positions including determining a net work for the cycle for each piston based on the cylinder pressures and corresponding piston positions.
A method of controlling an internal combustion engine including an engine block defining a cylinder and a piston received in the cylinder, the method comprising:
- determining a position of the piston within the cycle;
- determining a pressure within the cylinder, when the piston is at the determined position, with a pressure sensor disposed in the cylinder;
- controlling the engine in real time based on a series of cylinder pressures and corresponding piston positions wherein the engine operates over a four stroke cycle including an intake stroke, a compression stroke, a power stroke, and an exhaust stroke;
- determining the position of the piston within the cycle at a plurality of points on the compression stroke and a plurality of points on the power stroke;
- determining the pressure within the cylinder with the pressure sensor for the plurality of points on the compression stroke and the plurality of points on the power stroke;
- and
- determining a net work for the cycle based on the cylinder pressures and corresponding piston positions for the plurality of points on the compression stroke and the plurality of points on the power stroke.
A method of controlling an internal combustion engine including an engine block defining a cylinder and a piston received in the cylinder, the method comprising:
- determining a position of the piston within the cycle;
- determining a pressure within the cylinder, when the piston is at the determined position, with a pressure sensor disposed in the cylinder;
- and
- controlling the engine in real time based on a series of cylinder pressures and corresponding piston positions wherein the pressure sensor has a logarithmic output.
A method of controlling an internal combustion engine including an engine block defining a plurality of cylinders and a plurality of pistons, each piston received in a corresponding cylinder, the method comprising:
- determining a position of each piston within the cycle;
- measuring a pressure within each cylinder, when the corresponding piston is at the determined position;
- and
- controlling the engine in real time based on a series of cylinder pressures and corresponding piston positions for the plurality of cylinders and corresponding plurality of pistons wherein the pressure for each cylinder is measured with a pressure sensor has a logarithmic output.
A method of controlling an internal combustion engine including an engine block defining a cylinder and a piston received in the cylinder, the method comprising:
- determining a position of the piston within the cycle;
- determining a pressure within the cylinder, when the piston is at the determined position, with a pressure sensor disposed in the cylinder;
- controlling the engine in real time based on a series of cylinder pressures and corresponding piston positions wherein the engine operates over a four stroke cycle including an intake stroke, a compression stroke, a power stroke, and an exhaust stroke;
- and wherein the engine includes an intake pressure sensor;
- determining the position of the piston within the cycle at a point on the intake stroke;
- determining the pressure within the cylinder with the pressure sensor for the point on the intake stroke;
- determining the intake pressure form the intake pressure sensor;
- and
- calibrating an offset of the cylinder pressure sensor based on the intake pressure from the intake pressure sensor.
A method of controlling an internal combustion engine including an engine block defining a plurality of cylinders and a plurality of pistons, each piston received in a corresponding cylinder, the method comprising:
- determining a position of each piston within the cycle;
- measuring a pressure within each cylinder, when the corresponding piston is at the determined position;
- controlling the engine in real time based on a series of cylinder pressures and corresponding piston positions for the plurality of cylinders and corresponding plurality of pistons wherein the engine operates over a four stroke cycle including an intake stroke, a compression stroke, a power stroke, and an exhaust stroke and wherein the engine includes an intake pressure sensor;
- determining the position of each piston within the cycle at a point on the intake stroke;
- determining the pressure within each cylinder for the point on the intake stroke for the corresponding piston;
- determining the intake pressure from the intake pressure sensor;
- and
- calibrating an offset of the pressure measurements for each cylinder based on the intake pressure from the intake pressure sensor.
A method of controlling an internal combustion engine including an engine block defining a plurality of cylinders and a plurality of pistons, each piston received in a corresponding cylinder, the method comprising:
- determining a position of each piston within the cycle;
- measuring a pressure within each cylinder, when the corresponding piston is at the determined position;
- controlling the engine in real time based on a series of cylinder pressures and corresponding piston positions for the plurality of cylinders and corresponding plurality of pistons wherein the engine operates over a four stroke cycle including an intake stroke, a compression stroke, a power stroke, and an exhaust stroke;
- determining the position of each piston within the cycle at a plurality of points on the compression stroke and a plurality of points on the power stroke;
- determining the pressure within each cylinder for the plurality of points on the compression stroke and the plurality of points on the power stroke for the corresponding piston;
- and
- determining a net work for the cycle for each piston based on the cylinder pressures and corresponding piston positions for the plurality of points on the compression stroke and the plurality of points on the power stroke.
A method of controlling an internal combustion engine including an engine block defining a plurality of cylinders and a plurality of pistons, each piston received in a corresponding cylinder, the method comprising:
- determining a position of each piston within the cycle;
- measuring a pressure within each cylinder, when the corresponding piston is at the determined position;
- controlling the engine in real time based on a series of cylinder pressures and corresponding piston positions for the plurality of cylinders and corresponding plurality of pistons wherein the engine operates over a four stroke cycle including an intake stroke, a compression stroke, a power stroke, and an exhaust stroke;
- determining the position of each piston within the cycle at a plurality of points on the compression stroke and a plurality of points on the power stroke;
- determining the pressure within each cylinder for the plurality of points on the compression stroke and the plurality of points on the power stroke for the corresponding piston;
- determining a net work for the cycle for each piston based on the cylinder pressures and corresponding piston positions for the plurality of points on the compression stroke and the plurality of points on the power stroke;
- and
- controlling the engine based on the net work for the cycle for each piston to balance the power output from each engine cylinder.
Dependencies are inferred from the claim text.