The present invention provides a novel internal combustion engine design and methods for using the same. The internal combustion engine of the present invention may include two rotors on which the pistons and cylinders and pistons are mounted, respectively. A plurality of cylinders mounted on a cylinder rotor, and a plurality of pistons mounted on a piston rod rotor, where the arrangements of the pistons and cylinders are complementary and each piston is paired with one of the cylinders. The cylinder rotor and the piston rod rotor may be position at oblique angle relative to one another, such that their central axes are located on a same plane, but the axes are not coaxially aligned and intersect on that plane.

The present invention provides a novel internal combustion engine design and methods for using the same. The internal combustion engine of the present invention may include two rotors on which the pistons and cylinders and pistons are mounted, respectively. A plurality of cylinders mounted on a cylinder rotor, and a plurality of pistons mounted on a piston rod rotor, where the arrangements of the pistons and cylinders are complementary and each piston is paired with one of the cylinders. The cylinder rotor and the piston rod rotor may be position at oblique angle relative to one another, such that their central axes are located on a same plane, but the axes are not coaxially aligned and intersect on that plane.

The present invention provides a novel internal combustion engine design and methods for using the same. The internal combustion engine of the present invention may include two rotors on which the pistons and cylinders and pistons are mounted, respectively. A plurality of cylinders mounted on a cylinder rotor, and a plurality of pistons mounted on a piston rod rotor, where the arrangements of the pistons and cylinders are complementary and each piston is paired with one of the cylinders. The cylinder rotor and the piston rod rotor may be position at oblique angle relative to one another, such that their central axes are located on a same plane, but the axes are not coaxially aligned and intersect on that plane.

The present invention provides a novel internal combustion engine design and methods for using the same. The internal combustion engine of the present invention may include two rotors on which the pistons and cylinders and pistons are mounted, respectively. A plurality of cylinders mounted on a cylinder rotor, and a plurality of pistons mounted on a piston rod rotor, where the arrangements of the pistons and cylinders are complementary and each piston is paired with one of the cylinders. The cylinder rotor and the piston rod rotor may be position at oblique angle relative to one another, such that their central axes are located on a same plane, but the axes are not coaxially aligned and intersect on that plane.

The present invention provides a novel internal combustion engine design and methods for using the same. The internal combustion engine of the present invention may include two rotors on which the pistons and cylinders and pistons are mounted, respectively. A plurality of cylinders mounted on a cylinder rotor, and a plurality of pistons mounted on a piston rod rotor, where the arrangements of the pistons and cylinders are complementary and each piston is paired with one of the cylinders. The cylinder rotor and the piston rod rotor may be position at oblique angle relative to one another, such that their central axes are located on a same plane, but the axes are not coaxially aligned and intersect on that plane.

The present invention provides a novel internal combustion engine design and methods for using the same. The internal combustion engine of the present invention may include two rotors on which the pistons and cylinders and pistons are mounted, respectively. A plurality of cylinders mounted on a cylinder rotor, and a plurality of pistons mounted on a piston rod rotor, where the arrangements of the pistons and cylinders are complementary and each piston is paired with one of the cylinders. The cylinder rotor and the piston rod rotor may be position at oblique angle relative to one another, such that their central axes are located on a same plane, but the axes are not coaxially aligned and intersect on that plane.

A four-stroke rotary-piston engine has an outer disk, and inner disk, at least one cylinder, at least one piston, at least one piston rod, a fixed gear engaged with a planet gear and a rotary gate valve positioned at a head of the cylinder. The inner disk is rotatable with respect to the outer disk by a compression control device. The planet gear rotates a crank situated on a shaft thereof. The shaft passes upwardly through the inner disk. The crank reciprocates a lever via the piston rod. The lever has an end pivoted on the outer disk so as to push the piston into and out of the cylinder.

A four-stroke rotary-piston engine has an outer disk, and inner disk, at least one cylinder, at least one piston, at least one piston rod, a fixed gear engaged with a planet gear and a rotary gate valve positioned at a head of the cylinder. The inner disk is rotatable with respect to the outer disk by a compression control device. The planet gear rotates a crank situated on a shaft thereof. The shaft passes upwardly through the inner disk. The crank reciprocates a lever via the piston rod. The lever has an end pivoted on the outer disk so as to push the piston into and out of the cylinder.

A compound engine assembly with at least one rotary internal combustion engine, an impulse turbine, and an exhaust pipe for each internal combustion engine providing fluid communication between the exhaust port of the respective internal combustion engine and the flow path of the turbine. Each exhaust pipe terminates in a nozzle. For each exhaust pipe, a ratio Vp/Vd between the pipe volume Vp and the displacement volume Vd of the respective internal combustion engine is at most 1.5. A minimum value of a cross-sectional area of each exhaust pipe is defined at the nozzle. In one embodiment, a ratio An/Ae between the minimum cross-sectional area An and the cross-sectional area Ae of the exhaust port of the respective internal combustion engine is at least 0.2. A method of compounding at least one rotary engine is also discussed.

The present invention provides a novel internal combustion engine design and methods for using the same. The internal combustion engine of the present invention may include two rotors on which the pistons and cylinders and pistons are mounted, respectively. A plurality of cylinders mounted on a cylinder rotor, and a plurality of pistons mounted on a piston rod rotor, where the arrangements of the pistons and cylinders are complementary and each piston is paired with one of the cylinders. The cylinder rotor and the piston rod rotor may be position at oblique angle relative to one another, such that their central axes are located on a same plane, but the axes are not coaxially aligned and intersect on that plane.