Ignition timing system for homogeneous charge compression engine
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorMinoru Iida
Life of this patent
Estimating the term…
Abstract
A method for controlling the start of combustion in an homogeneous charge compression engine includes forming an substantially homogeneous air/fuel charge. At least the air of the air/fuel charge is introduced into the combustion chamber through an intake port. When the air/fuel charge auto-ignites is controlled by adjusting the pressure differential between the intake port and the combustion chamber when the intake passage is in communication with the combustion chamber. The air/fuel charge is compressed and the air/fuel charge is auto-ignited due to the compression of the air/fuel charge.
Claims75
A method for operating an internal combustion engine comprising at least one combustion chamber formed by at least a first member and a second member that moves relative to the first member, the second member being coupled to an output shaft such that movement of the second member causes the output shaft to rotate, an intake port that is in communication with the combustion chamber and an intake passage and is opened and closed by an intake valve that is actuated by a valve actuating system, a fuel supply system and air supply system configured to provide a substantially homogeneous air/fuel charge, which is comprised of mixed fuel and air, to the combustion chamber, and a control system configured to control the valve actuating system, the method comprising:
- forming a substantially homogenous air/fuel charge;
- introducing at least the air of the air/fuel charge into the combustion chamber through the intake port;
- advancing the auto ignition of the air/fuel charge by increasing a pressure differential between the intake port and the combustion chamber when the intake passage is in communication with the combustion chamber;
- compressing the air/fuel charge;
- and
- auto-igniting the air/fuel charge due to the compression of the air/fuel charge.
A method for operating an internal combustion engine comprising at least one combustion chamber formed by at least a first member and a second member that moves relative to the first member, the second member being coupled to an output shaft such that movement of the second member causes the output shaft to rotate, an intake port that is in communication with the combustion chamber and an intake passage and is opened and closed by an intake valve that is actuated by a valve actuating system, a fuel supply system and air supply system configured to provide a substantially homogeneous air/fuel charge, which is comprised of mixed fuel and air, to the combustion chamber, and a control system configured to control the valve actuating system, the method comprising:
- forming a substantially homogenous air/fuel charge;
- introducing at least the air of the air/fuel charge into the combustion chamber through the intake port;
- controlling when the air/fuel charge auto-ignites by adjusting a pressure differential between the intake port and the combustion chamber when the intake passage is in communication with the combustion chamber;
- compressing the air/fuel charge;
- auto-igniting the air/fuel charge due to the compression of the air/fuel charge, further comprising;
- and
- determining a target pressure differential between the intake port and the combustion chamber, wherein determining a target pressure differential involves sensing an intake air pressure downstream of a charger of the induction system which increases the pressure of the air of the air/fuel charge and wherein adjusting the pressure differential between the intake port and the combustion chamber includes adjusting when the intake valve opens.
A method for operating an internal combustion engine comprising at least one combustion chamber formed by at least a first member and a second member that moves relative to the first member, the second member being coupled to an output shaft such that movement of the second member causes the output shaft to rotate, an intake port that is in communication with the combustion chamber and an intake passage and is opened and closed by an intake valve that is actuated by a valve actuating system, a fuel supply system and air supply system configured to provide a substantially homogeneous air/fuel charge, which is comprised of mixed fuel and air, to the combustion chamber, and a control system configured to control the valve actuating system, the method comprising:
- forming a substantially homogenous air/fuel charge;
- introducing at least the air of the air/fuel charge into the combustion chamber through the intake port;
- controlling when the air/fuel charge auto-ignites by adjusting a pressure differential between the intake port and the combustion chamber when the intake passage is in communication with the combustion chamber;
- compressing the air/fuel charge;
- auto-igniting the air/fuel charge due to the compression of the air/fuel charge, further comprising;
- and
- determining a target pressure differential between the intake port and the combustion chamber, wherein determining a target pressure differential involves sensing an intake air pressure downstream of a charger of the induction system which increases the pressure of the air of the air/fuel charge and wherein adjusting the pressure differential between the intake port and the combustion chamber a further includes adjusting a maximum lift of the intake valve.
An internal combustion engine comprising at least one combustion chamber formed by at least a first member and a second member that moves relative to the first member, the second member being coupled to an output shaft such that movement of the second member causes the output shaft to rotate, an intake port that is in communication with the combustion chamber and is opened and closed by an intake valve that is actuated by a valve actuating system, a fuel supply system and air supply system configured to provide a substantially homogeneous air/fuel charge, which is comprised of mixed fuel and air, to the combustion chamber, and a control system configured to control the valve actuating system, and means for advancing when the air/fuel charge auto-ignites due to compression in the combustion chamber by increasing a pressure differential between the intake port and the combustion chamber when the intake port is open.
An internal combustion engine comprising at least one combustion chamber formed by at least a first member and a second member that moves relative to the first member, the second member being coupled to an output shaft such that movement of the second member causes the output shaft to rotate, an intake port that is in communication with the combustion chamber and an intake passage and is opened and closed by an intake valve that is actuated by a valve actuating system, a fuel supply system and air supply system configured to provide a substantially homogeneous air/fuel charge, which is comprised of mixed fuel and air, to the combustion chamber, and a control system configured to control the valve actuating system and furthered configured to advance when the air/fuel charge auto-ignites by increasing a pressure differential between the intake port and the combustion chamber when the intake passage is in communication with the combustion chamber.
An internal combustion engine comprising at least one combustion chamber formed by at least a first member and a second member that moves relative to the first member, the second member being coupled to an output shaft such that movement of the second member causes the output shaft to rotate, an intake port that is in communication with the combustion chamber and an intake passage and is opened and closed by an intake valve that is actuated by a valve actuating system, a fuel supply system and air supply system configured to provide a substantially homogeneous air/fuel charge, which is comprised of mixed fuel and air, to the combustion chamber, and a control system configured to control the valve actuating system and furthered configured to control when the air/fuel charge auto-ignites by adjusting a pressure differential between the intake port and the combustion chamber when the intake passage is in communication with the combustion chamber wherein said induction system includes a charger to increase the pressure of the air of the air/fuel charge and said control system is configured to determine a target pressure differential by sensing an intake air charge pressure downstream of a charger of the induction system which increases the pressure of the air of the air/fuel charge and wherein said control system is further configured to control when said air/fuel charge auto-ignites by adjusting when the intake valve opens.
An internal combustion engine comprising at least one combustion chamber formed by at least a first member and a second member that moves relative to the first member, the second member being coupled to an output shaft such that movement of the second member causes the output shaft to rotate, an intake port that is in communication with the combustion chamber and an intake passage and is opened and closed by an intake valve that is actuated by a valve actuating system, a fuel supply system and air supply system configured to provide a substantially homogeneous air/fuel charge, which is comprised of mixed fuel and air, to the combustion chamber, and a control system configured to control the valve actuating system and furthered configured to control when the air/fuel charge auto-ignites by adjusting a pressure differential between the intake port and the combustion chamber when the intake passage is in communication with the combustion chamber wherein said induction system includes a charger to increase the pressure of the air of the air/fuel charge and said control system is configured to determine a target pressure differential by sensing an intake air charge pressure downstream of a charger of the induction system which increases the pressure of the air of the air/fuel charge and wherein said control system is further configured to control when said air/fuel charge auto-ignites by adjusting a maximum lift of the intake valve.
Dependencies are inferred from the claim text.