Back to results
US 2015/0059695 A1Published application
Long Power Stroke Engine
OwnerOtto M. Wildensteinerinventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerOtto M. Wildensteinerinventor
Estimating the term…
Means and method of substantially increasing the efficiency of a spark ignition Otto cycle engine. This is done by increasing the stroke length of the pistons and reducing the amount of air (or fuel/air mixture) by means other than the throttle plate taken in on the intake stroke. The amount of air or fuel/air mixture taken in is that which creates the same conditions in the combustion chamber at the conclusion of the compression stroke as exist in prior art engines used for the same application. The advantage arises from the increase in the length of the power stroke; this extracts more energy from the combustion gases before they are removed on the exhaust stroke and it also increases the torque of the engine as it is well known that torque is a function of stroke length. Extracting more energy from the combustion gases also reduces the amount of heat transferred to the engine block, thereby reducing the load on the cooling system.
An Otto cycle internal combustion engine having a cylinder, intake means for directing air or fuel/air mixture into said cylinder, said means for directing air or fuel/air mixture into said cylinder having a throttle plate therein, an intake valve which opens to allow air or fuel/air mixture into said cylinder on the intake stroke and closes at the end of said intake stroke, a camshaft having a lobe thereon which operates said intake valve, a piston in said cylinder, and a combustion chamber at the top of said cylinder wherein the compression ratio is considerably greater than 13.5:1 but conditions inside the combustion chamber at the conclusion of the compression stroke are approximately the same as those in an engine whose compression ratio is in the range of approximately 6:1 to 13.5:1.
An Otto cycle internal combustion engine having a cylinder, exhaust means for conducting combustion gases away from said cylinder, an exhaust valve in said cylinder which opens to allow said combustion gases out of said cylinder and closes at the end of the exhaust stroke, a camshaft having a lobe thereon which operates said exhaust valve, and means for venting air from said cylinder during the compression stroke.
The method of increasing the efficiency of an Otto cycle internal combustion engine having a cylinder, a piston in said cylinder, a compression ratio resulting from the travel of said piston in said cylinder, a combustion chamber in said cylinder, a valve for controlling the flow of air or fuel/air mixture into said cylinder, and means for operating said valve, which comprises increasing said compression ratio of said engine to a value in excess of about 13.5:1 and decreasing the amount of air or fuel/air mixture taken into said engine during the intake stroke of said engine such that the conditions in said combustion chamber are the same as before said compression ratio was increased.
Dependencies are inferred from the claim text.