摘要:
An engine system is provided. The engine system includes a first piston movable within a cylinder, a second piston movable within a hollow body of the first piston, the movement defining a boundary of a reservoir within the hollow body, a spring device coupled to the first piston and the second piston, and a vent passage fluidically connecting the reservoir to the cylinder.
摘要:
A high efficiency steam engine or steam expander includes a cylinder, cylinder head and piston in which cylinder clearance volume is zero or nearly zero together with a negligible amount of compression such that any pressure in the cylinder clearance volume just before the power stroke is as low as ambient pressure or condenser pressure to provide superior thermal efficiency in a compact compound engine having a high pressure expansion chamber within the piston and low pressure chamber in the cylinder. The inlet valve is opened slightly by piston movement and a steam assist force then drives it to its fully open position. Steam passes from the high pressure chamber to the low pressure chamber through a transfer valve located in the head of the piston and steam is released through an automatic exhaust valve in the cylinder head.
摘要:
An engine may include a cylinder having a first combustion chamber at one end thereof and a second combustion chamber at an opposing end thereof, first and second cylinder heads at an end of the first combustion chamber and the second combustion chamber, respectively, and a double-faced piston slidably mounted within the cylinder. The piston may be configured to move in a first stroke from the first end to the second end of the cylinder. The piston and the cylinder may be configured such that the first stroke includes an expansion stroke portion during which chemical energy from combustion in the first combustion chamber is converted into mechanical power of the piston, and a momentum stroke portion during which the piston continues to move to the second end of the cylinder and gases are exchanged between the first combustion chamber and a location outside the cylinder.
摘要:
An engine can include at least one piston, a block, a fluid delivery system, and an output shaft. The block can define at least one cylinder. The piston can be received in the cylinder. The piston can be operable to reciprocally move rectilinearly while positioned in the cylinder. The fluid delivery system can be operable to communicate air and combustible fuel to the cylinder. The piston can be operable to compress the air and combustible fuel. The output shaft can be driven in motion by the piston and extend beyond the block to a distal end. The output shaft is limited to rectilinear movement.
摘要:
A linear reciprocating engine may include a cylinder having a first combustion chamber at one end and a second combustion chamber at an opposing end, first and second cylinder heads located at an end of the first and second combustion chambers, respectively, and a double-faced piston slidably mounted within the cylinder. The engine may further include a first piston rod portion having a first recess extending from a first face of the double-faced piston through the first combustion chamber, and a second piston rod portion having a second recess extending from a second face of the piston through the second combustion chamber. The engine may further include at least one port in a peripheral wall of the cylinder, for alternatively communicating gases between at least one region external to the cylinder and at least one of the first combustion chamber and the second combustion chamber.
摘要:
An internal combustion engine may include an engine block, a cylinder defining a combustion chamber, and a piston in the cylinder. The piston may travel in a first stroke from one end to an opposite end of the cylinder, and may be sized relative to the cylinder to enable an expansion stroke portion of the first stroke while the piston travels under gas expansion pressure, and a momentum stroke portion of the first stroke for the remainder of the first stroke following the expansion stroke portion. A piston rod portion may be connected to the piston and extend from a location within the combustion chamber to an area external to the cylinder. A recess in the piston rod portion may form a passageway to continuously communicate gas flow between the combustion chamber and the area external to the cylinder when the piston is in the momentum stroke portion.
摘要:
The present invention is a linear internal combustion free-piston engine with three acting pistons per combustion chamber, that has the ability to store energy until needed. This engine utilizes a spring to store potential energy after combustion. The present invention also introduces additional air into the combustion chamber during the combustion cycle providing a more complete burn of the fuel, has the ability to self-start, and does not idle. Multiple engines can be married together and run as a single unit.
摘要:
A high order of thermal efficiency is achieved in a steam engine or steam expander having a piston clearance that approximates zero together with a negligible amount of compression, such that pressure in the clearance volume approximates ambient pressure, i.e. atmospheric or condenser pressure as the case may be at the end of the piston return stroke when the clearance is essentially zero and constitutes a new engine apparatus and Rankine operating cycle that can be referred to as “zero clearance with zero compression”. The steam admission valve assembly can be operated either automatically responsive to piston contact or by means of a cam shaft or electrically by means of a solenoid. A normally open exhaust valve permits residual steam to be exhausted through the piston return stroke, closed by the piston or cam then held closed by a fresh charge of steam.
摘要:
A high order of thermal efficiency is achieved in a steam engine or expander having a piston clearance that approximates zero together with a negligible amount of compression, such that pressure in the clearance volume approximates ambient pressure, i.e. atmospheric or condenser pressure as the case may be at the end of the piston return stroke when the clearance is essentially zero. These two provisions working together simultaneously provide a method and apparatus which constitute a new engine apparatus and Rankine operating cycle that can be referred to as “zero clearance with zero compression”. The invention also provides an improved steam admission valve assembly that can be operated either automatically responsive to piston movement or by means of a cam shaft and cam or electrically by means of a solenoid that provides an intermittent magnetic field for operating one or more valves. A biphasic exhaust system is described in which a piston operated valve opens to exhaust steam in a primary phase at or near maximum displacement, and in a secondary phase an auxiliary, normally open exhaust valve facing the top of the piston permits virtually all residual steam to be exhausted through the approximate end of the piston return stroke after which it is closed by the piston, by a lifter on the piston or by the cam and finally held closed during the power stroke by a fresh charge of steam injected through the steam admission valve into the clearance volume as it approaches zero.
摘要:
A high efficiency combined cycle internal combustion and steam engine includes a cylinder having a piston mounted for reciprocation therein with an internal combustion chamber outward of the piston, a fixed cylinder cap sealingly and slidably mounted within the piston and a steam expansion and recompression chamber inside the piston adjacent the cylinder cap. The cylinder cap can be unheated or heated externally to reduce condensation of steam entering the steam chamber from a steam generator fired by waste combustion heat. After a steam exhaust valve closes at the top center position, residual steam is recompressed during an inward stroke of the piston up to admission pressure prior to admitting the next charge of steam. A wrist pin that is connected to an inner part of the skirt of the piston and located inwardly of the cylinder cap is coupled to a connecting rod that is secured at its inner end to a crankshaft. One valve or a pair of retractable steam inlet valves connected in series within the cylinder cap inside the piston act in cooperation with steam recompression and a variable clearance volume to achieve an effective zero steam chamber clearance and a gain in mean Rankine cycle temperature to maximize efficiency. The amount of steam admitted each outward stroke is continuously regulated to reduce fuel consumption. Engine coolant can be evaporated in an engine cooling jacket to form steam that is superheated in a combustion exhaust manifold.