Abstract: A system and method for providing a variable compression ratio internal combustion engine is disclosed. The system can include a crankshaft pivotally coupled to a standard engine block using a plurality of pivoting main bearing caps. The system can pivot the main bearing caps, and thus the crankshaft, to increase or decrease the compression ratio of the engine. The system can also include a plurality of actuators to move one end of the main bearing caps. The crankshaft can comprise one or more flexible joints to enable the crankshaft to move, while the output(s) of the crankshaft remain stationary to enable conventional sealing and power take-off. The compression ratio can be varied continuously during use and can be included in an overall engine management system.

Abstract: A system and method for providing a variable compression ratio internal combustion engine is disclosed. The system can include a plurality of hollow head bolts for coupling the cylinder head and block of an internal combustion engine. The system can also include a plurality of control bolts disposed through the hollow head bolts to enable vertical movement of the engine components (i.e., in the y-axis), while reducing, or eliminating, unwanted movement and stresses in other directions. A number of mechanisms can be used to move the cylinder head/block assembly, including a rack and pinion, a hydraulic or pneumatic actuator, and a gear drive. The compression ratio can be varied continuously during use and can be included in an overall engine management system.

Abstract: A system and method for providing a variable compression ratio internal combustion engine is disclosed. The system can include a frame affixed to the engine crankcase and a complementary frame affixed to the block/cylinder head assembly. The system can further comprise an actuating system to enable the block/head assembly to be moved up and down with respect to the crankcase, varying the compression ratio of the engine. A number of mechanisms can be used to achieve this movement, including a rack and pinion, a hydraulic or pneumatic actuator, and a gear drive. The compression ratio can be varied continuously during use. The frames substantially limit movement of the engine components to the y-axis, thus reducing, or eliminating, unwanted movement and stresses in other directions.

Abstract: A system and method for providing a variable compression ratio internal combustion engine is disclosed. The system can include a crankshaft pivotally coupled to a standard engine block using a plurality of pivoting main bearing caps. The system can pivot the main bearing caps, and thus the crankshaft, to increase or decrease the compression ratio of the engine. The system can also include a plurality of actuators to move one end of the main bearing caps. The crankshaft can comprise one or more flexible joints to enable the crankshaft to move, while the output(s) of the crankshaft remain stationary to enable conventional sealing and power take-off. The compression ratio can be varied continuously during use and can be included in an overall engine management system.

Abstract: A system and method for providing a variable compression ratio internal combustion engine is disclosed. The system can include a crankshaft pivotally coupled to a standard engine block using a plurality of pivoting main bearing caps. The system can pivot the main bearing caps, and thus the crankshaft, to increase or decrease the compression ratio of the engine. The system can also include a plurality of actuators to move one end of the main bearing caps. The crankshaft can comprise one or more flexible joints to enable the crankshaft to move, while the output(s) of the crankshaft remain stationary to enable conventional sealing and power take-off. The compression ratio can be varied continuously during use and can be included in an overall engine management system.

Abstract: A system and method for providing a variable compression ratio internal combustion engine is disclosed. The system can include a plurality of hollow head bolts for coupling the cylinder head and block of an internal combustion engine. The system can also include a plurality of control bolts disposed through the hollow head bolts to enable vertical movement of the engine components (i.e., in the y-axis), while reducing, or eliminating, unwanted movement and stresses in other directions. A number of mechanisms can be used to move the cylinder head/block assembly, including a rack and pinion, a hydraulic or pneumatic actuator, and a gear drive. The compression ratio can be varied continuously during use and can be included in an overall engine management system.

Abstract: A system and method for providing a variable compression ratio internal combustion engine is disclosed. The system can include a plurality of hollow head bolts for coupling the cylinder head and block of an internal combustion engine. The system can also include a plurality of control bolts disposed through the hollow head bolts to enable vertical movement of the engine components (i.e., in the y-axis), while reducing, or eliminating, unwanted movement and stresses in other directions. A number of mechanisms can be used to move the cylinder head/block assembly, including a rack and pinion, a hydraulic or pneumatic actuator, and a gear drive. The compression ratio can be varied continuously during use and can be included in an overall engine management system.

Abstract: A system and method for providing a variable compression ratio internal combustion engine is disclosed. The system can include a crankshaft pivotally coupled to a standard engine block using a plurality of pivoting main bearing caps. The system can pivot the main bearing caps, and thus the crankshaft, to increase or decrease the compression ratio of the engine. The system can also include a plurality of actuators to move one end of the main bearing caps. The crankshaft can comprise one or more flexible joints to enable the crankshaft to move, while the output(s) of the crankshaft remain stationary to enable conventional sealing and power take-off. The compression ratio can be varied continuously during use and can be included in an overall engine management system.

Abstract: A system and method for providing a variable compression ratio internal combustion engine is disclosed. The system can include a plurality of hollow head bolts for coupling the cylinder head and block of an internal combustion engine. The system can also include a plurality of control bolts disposed through the hollow head bolts to enable vertical movement of the engine components (i.e., in the y-axis), while reducing, or eliminating, unwanted movement and stresses in other directions. A number of mechanisms can be used to move the cylinder head/block assembly, including a rack and pinion, a hydraulic or pneumatic actuator, and a gear drive. The compression ratio can be varied continuously during use and can be included in an overall engine management system.

Abstract: A system and method for providing a variable compression ratio internal combustion engine is disclosed. The system can include a frame affixed to the engine crankcase and a complementary frame affixed to the block/cylinder head assembly. The system can further comprise an actuating system to enable the block/head assembly to be moved up and down with respect to the crankcase, varying the compression ratio of the engine. A number of mechanisms can be used to achieve this movement, including a rack and pinion, a hydraulic or pneumatic actuator, and a gear drive. The compression ratio can be varied continuously during use. The frames substantially limit movement of the engine components to the y-axis, thus reducing, or eliminating, unwanted movement and stresses in other directions.