37results about How to "Variable compression ratio" patented technology

An improved turning point system and method for performing data compression is disclosed. The system improves the conventional turning point compression method by selecting a predetermined number of the "best" turning points in the sample window including data samples X0 and XN. From this sample-window, ones of the data samples X1 through X(N-1) will be identified as turning points using a selected one of a disclosed set of turning point detection methods. In one embodiment, a turning point is identified by determining that the slopes in the lines interconnecting adjacent data points have different polarities. In an alternative embodiment, a data sample XM is considered a turning point if the slope of the line between the data samples XM and X(M+1) has a different polarity as compared to the slope of the last waveform segment that was encountered that did not have a slope of zero. According to one mechanism, amplitude thresholding is used to detect whether an identified turning point is likely the result of noise such that the turning point status of the data sample should be disregarded. After data samples are identified as turning points, ones of the identified turning points are identified as the "best" turning points to be selected for retention. The best turning points may be identified by determining which waveform segment included within a sample window has the largest change of amplitude. An alternative embodiment detects which of the turning points has the greatest signal amplitude compared to a reference value. Yet another embodiment selects as the best turning point that point having an amplitude that differs the most from the amplitude of the first data sample in the sample window. Still other embodiments retain the turning point having an amplitude which is more positive, or alternatively, more negative, than the other data samples. According to one aspect of the invention, the compression ratio varies based on the frequency of the input waveform. In another embodiment, position data is retained to indicate the relative position of retained data samples as compared to the position of other retained data samples. This position data may be calculated at a frequency that is less than the frequency of the sampled data.

The invention relates to a reciprocating engine in a motor vehicle, comprising a coupling arrangement for transmission of a torque, from a crank shaft end, to a crank shaft flange supported in a cylinder block, the crank shaft end being movable in the radial direction with respect to the crank shaft flange, characterised in that the crank shaft end and the crank shaft flange together form an axially extended cavity adapted to contain the coupling arrangement.

The invention relates to a movable multipart piston device belonging to the technical field of an internal combustion engine. The movable multipart piston device comprises an air cylinder, a cylinder cover, a piston, a piston ring, a connecting rod, a volume cavity, a spring and movable bodies, wherein the volume cavity is formed in the top of the piston, the movable bodies are all distributed in the volume cavity, a first movable body is arranged above a second movable body, a third movable body is arranged above a fourth movable body, and the lower end surface of the first movable body, the upper end surface of the second movable body, the lower end surface of the third movable body and the upper end surface of the fourth movable body are respectively of a slope structure. Under a high speed working condition, when pressure in a combustion chamber is highest and the combustion pressure is relatively high, the second movable body moves rightwards, the fourth movable body moves leftwards, and the volume of the combustion chamber is increased; under the low speed working condition, when the pressure in the combustion chamber is highest and the combustion pressure is relatively small, the second movable body moves leftwards, the fourth movable body moves rightwards, and the volume of the combustion chamber is reduced. The movable multipart piston device is reasonable in structure, simple in design and applicable to the optimized design of an engine piston.

The invention discloses a novel engine mechanism with the variable compression ratio. The novel engine mechanism with the variable compression ratio is characterized by comprising a crank shaft whichis axially connected with a cylinder body and pistons which are on the crank shaft and in linkage with the crank shaft, and further comprising an eccentric shaft arranged between the crank shaft and the pistons, wherein the eccentric shaft comprises a main shaft body and auxiliary shaft bodies which are eccentrically arranged on the main shaft body, the end part of the main shaft body is axially connected with the cylinder body and is provided with a driving mechanism for driving the main shaft body to rotate; and the pistons are connected with the auxiliary shaft bodies of the eccentric shaftand the crank shaft through multi-stage connecting rod devices which are capable of changing the total length of connecting rods when the main shaft body rotates. According to the novel engine mechanism with the variable compression ratio, the structure is simple, the eccentric shaft is driven to rotate to move the positions of stop points on the pistons by controlling a motor, and therefore thevolume and the compression ratio of a combustion chamber can be changed, and the compression ratio can be changed; and the mechanism with the variable compression ratio belongs to mechanical movementcomponents, and therefore the possibility of fault is small, and the reliability is high.

Systems and methods are provided for varying a compression ratio in an engine having a pressure reactive piston. The pressure reactive piston may include a piston crown, and a spring positioned within the piston crown, wherein the spring includes a first ring, a second ring comprising a plurality of apertures, a rolling element positioned within each of the plurality of apertures, and a third ring. The first ring, the second ring, and the third ring of the spring may be arranged concentrically and the second ring may be positioned between the first ring and the third ring.

The invention belongs to the technical field of internal combustion engines, and discloses a piston system with a volume cavity formed inside. The piston system comprises an air cylinder, a cylinder cover, a piston, a piston ring, a connecting rod, the volume cavity, a spring, moving bodies and a penetrating hole. The volume cavity is formed inside the piston. The first moving body, the second moving body, the third moving body and the fourth moving body are all arranged in the volume cavity, and the lower end face of the third moving body, the upper end face of the first moving body, the lower end face of the fourth moving body and the upper end face of the second moving body are each of a slope structure. Under the high speed working condition, when the highest combustion pressure in a combustion chamber is high, the first moving body moves rightwards, the second moving body moves leftwards, and the volume of the combustion chamber is increased; under the lower speed working condition, when the highest combustion pressure in the combustion chamber is low, the first moving body moves leftwards, the second moving body moves rightwards, and the volume of the combustion chamber is decreased. The piston system is reasonable in structure, simple in design and suitable for optimization design of engine pistons.

The improved-type internal combustion engine combustor is made up of exhausting valve needle; a part of exhaust pipe; variable lift stop bar; offset friction upper link rod and inertial spring. It has advantage of adjustable internal space of combustion room and capable of discharging empty of waste gas. It is adapted to using in internal combustion engine system.

The invention discloses a highly oil-saving engine. According to the highly oil-saving engine, gas is ignited and explodes when the force arm length between a connecting rod and a crankshaft is large, then a high force moment generates on the crankshaft and simultaneously a high gas compression ratio is maintained. The highly oil-saving engine comprises an air cylinder, a main piston, the connecting rod, the crankshaft, sparking plugs and an oil nozzle, wherein the main piston does reciprocating movements in the air cylinder, the connecting rod is connected with the main piston, the crankshaft is driven by the connecting rod to rotate, and the sparking plugs and the oil nozzle are located in the air cylinder. An auxiliary piston which is used in cooperation with the main piston to do up-down reciprocating movements as the main piston is arranged above the main piston in the air cylinder. The sparking plugs and the oil nozzle are located between the main piston and the lower dead center of the auxiliary piston. Compared with the prior art, the highly oil-saving engine has the advantages that the highly oil-saving engine is of the double-piston structure that the auxiliary piston is additionally arranged above the main piston so that the high gas compression ratio can be maintained when the main piston in the air cylinder moves downwards; the gas is ignited and explodes when the force arm length between the connecting rod and the crankshaft is large, then the high force moment can generate on the condition of low oil consumption, and consequently the purpose of saving oil is achieved.

The invention relates to a multi-cascaded double-cylinder linear compressor, and belongs to the field of energy power. The multi-cascaded double-cylinder linear compressor comprises double-cavity compression cylinders, a linear motor and cascading pipes. Each cylinder is composed of a cylinder cover and a cylinder body and is divided by a double-sided piston into two air cavities (a first-stage compression cavity and a second-stage compression cavity), wherein the two air cavities communicate with each other through the corresponding cascading pipe; and the double-sided piston is driven by thelinear motor to reciprocate to continuously change the volumes of the two air cavities, so that first-stage compression and second-stage compression are completed. Series connection and parallel connection of the multi-cascaded double-cylinder linear compressor are completed through different connection manners of the cascading pipes, and thus, variable-pressure ratio and variable-displacement output is achieved. According to the multi-cascaded double-cylinder linear compressor, the structure of the high-pressure compressor is simplified; and a multi-cascaded reciprocating-type linear compressor system is a resonant system, so that the energy utilization rate is increased.

A split-cycle internal combustion engine includes a variable displacement compressor having two or more cylinders, an adjustment mechanism for varying the displacement volume of the compressor and possibly the phase between the compressor and the motor, and a rotary motor having two or more expansion chambers. A passage valve system located between the compressor and the motor transfers working fluid and combustion exhaust products, and, in addition, mechanically and thermally isolates the compressor from the high pressures and temperatures present in the motor.

The invention discloses a double-piston internal combustion engine which comprises a piston (1), an air cylinder (2) and an air cylinder cover (3), wherein the air cylinder cover (3) is arranged at the upper end of the air cylinder (2); a connecting rod is connected to the lower end of the piston (1); the connecting rod and a crankshaft are connected to form a piston crank connecting rod mechanism. The double-piston internal combustion engine further comprises a pressure sensor (11), a pressure strain piston (4), an air bag (5) and a stress piston (6); the pressure strain piston (4), the air bag (5) and the stress piston (6) are arranged in the air cylinder cover (3); one end of the stress piston (6) is supported against the lower part of the air bag (5); the other end of the stress piston (6) is connected with the pressure strain piston (4) through a connecting rod (8); a pressure relief pipe (12) and a pressurizing pipe (13) are respectively connected onto the air bag (5); normally-closed solenoid valves (10) are respectively arranged on the pressure relief pipe (12) and the pressurizing pipe (13). According to the double-piston internal combustion engine, the control over the combustion state and characteristics of the internal combustion engine is realized.

The invention discloses a piston device having a volume cavity in the top, and belongs to the technical field of internal combustion engines. The piston device comprises a cylinder, a cylinder cover, a piston, a piston ring, a connecting rod, the volume cavity, a spring and mobile bodies, wherein the volume cavity is formed in the top of the piston, and is divided into left and right two parts; first and second mobile bodies are both arranged in the volume cavity; the first mobile body is arranged above the second mobile body; the lower end surface of the first mobile body, the upper end surface of the second mobile body and the upper end surface of the right part of the volume cavity are all slope structures; and the lower end surface of the first mobile body and the upper end surface of the second mobile body are in sealing contact. Under the working condition of high speed, when the pressure is the highest and the combustion pressure is higher in a combustion chamber, the second mobile body moves to the right side, the first mobile body downwards moves, and the volume of the combustion chamber is increased; and under the working condition of low speed, when the pressure is the highest and the combustion pressure is lower in the combustion chamber, the second mobile body moves to the left side, the first mobile body upwards moves, and the volume of the combustion chamber is decreased. The piston device is reasonable in structure and simple in design, and is suitable for optimal design of engine pistons.

A variable compression ratio rotor engine with reciprocating circular arc motion belongs to the field of mechatronics and includes a wet clutch, an angular displacement sensor, a transmission gear, a reversing shaft and the like. It is characterized in that: the angular displacement sensor can continuously detect the rotation angle of the rotor relative to position B, and when the on-board ECU judges that the angle reaches the angle set by the system, it controls the hydraulic system to connect or disconnect each wet clutch, and switches the transmission route, so that The reciprocating arc motion of the rotor is converted into the one-way circular motion of the output shaft. At the same time, the on-board ECU can judge whether it is necessary to change the engine compression ratio according to the driving conditions of the vehicle. When the compression ratio needs to be changed, the on-board ECU changes it according to the model preset by the vehicle. The maximum angle value that the rotor can rotate currently set by the system makes the maximum angle that the engine rotor can rotate different, the total volume of the cylinder changes, but the volume of the combustion chamber remains unchanged, so that the compression ratio is variable. The invention has the advantages of realizing variable compression ratio of the rotary engine, wide range of compression ratio and large maximum compression ratio.