Abstract:
A power plant produces power by using high pressure gas to push a piston. The power plant uses a supply device to provide the high pressure gas to a cylinder and controls an admission valve and an exhaust valve to admit and exhaust the high pressure gas for pushing the piston and rotating a crank member to produce power.

Description:
1. FIELD OF THE INVENTION 
       [0001]    The present invention relates to power plants, and more particularly to a power plant by using high pressure gas to push a piston of a cylinder for producing power. 
       2. DESCRIPTION OF THE RELATED ART 
       [0002]    Now, problems of energy sources focus on pollution produced by burning oil fuel, greenhouse effect, and exhausting in the future 30-50 years, etc. Current gas engines or engines generally use the oil fuel, such as oil or diesel oil, as the energy sources. Therefore, the oil fuel of the gas engines or engines burned will produce the pollution and produce the greenhouse effect. Furthermore, since the oil fuel is an unregenerate energy source, with the price of the oil fuel raises increasingly, global economy is impacted increasingly by the high price of the oil fuel. Therefore, an object of the present is designing a power plant producing no pollution. 
         [0003]    The inventors of the present invention work hardly to solve the above problems. With the long work, a power plant of the present invention has been successfully designed to solve the above problems. 
         [0004]    What is needed, therefore, is a power plant, which can solve the above problems. 
       BRIEF SUMMARY 
       [0005]    The present invention is providing a power plant, which produces power by using high pressure gas to push a piston. The power plant does not exhaust pollution and produce greenhouse effect. 
         [0006]    A power plant in accordance with a preferred embodiment of the present invention includes a cylinder and an outer supply device for providing high pressure gas. The outer supply device provides the high pressure gas to the cylinder for pushing a piston and rotating a crank member to produce power. 
         [0007]    Compared with the conventional power plants, the present power plant uses the high pressure gas to press the piston and drive the crank member. Therefore, the present power plant has a simple structure better than the conventional power plants using the oil fuel. Furthermore, the gas can be easily obtained and cheap, and has no pollution and no greenhouse effect. The present power plant operates without burning the oil fuel, and operates safely and quietly, and is worth to be used widely. 
         [0008]    Other objects, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which: 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0009]    These and other features and advantages of the various embodiments disclosed herein will be better understood with respect to the following description and drawings, in which like numbers refer to like parts throughout, and in which: 
           [0010]      FIG. 1  is a schematic, cross-sectional view of a power plant in a first condition in accordance with a first preferred embodiment of the present invention, wherein the admission valve being opened and the exhaust valve being closed; 
           [0011]      FIG. 2  is a schematic, cross-sectional view of a power plant in a second condition in accordance with a second preferred embodiment, wherein the admission valve being closed and the exhaust valve being opened; 
           [0012]      FIG. 3  is a schematic, side cross-sectional view of the power plant in accordance with the second preferred embodiment, wherein the cylinder body including a single cylinder and the valve being a poppet valve of mechanical valves; 
           [0013]      FIG. 4  is a schematic, side cross-sectional view of the power plant in a second condition in accordance with the first preferred embodiment, wherein the cylinder body including a single cylinder and the valve being a poppet valve of mechanical valves; 
           [0014]      FIG. 5  is another schematic, side cross-sectional view of the power plant in accordance with the second preferred embodiment, wherein the cylinder body including a single cylinder and the valve being a solenoid valve; and 
           [0015]      FIG. 6  is a schematic, cross-sectional view of a power plant in accordance of the second preferred embodiment, wherein the cylinder body including four cylinders arranged in line. 
       
    
    
     DETAILED DESCRIPTION 
       [0016]    Reference will now be made to the drawings to describe a preferred embodiment of the present power plant, in detail. 
         [0017]    The design of the present invention is guiding high pressure gas into a cylinder having a piston and exhausting the high pressure gas out by controlling an admission valve and an exhaust valve to push the piston upwards or downwards and drive a crank member rotating for producing power. 
         [0018]    Referring to  FIGS. 1-5 , a power plant in accordance with a preferred embodiment of the present invention is shown. The power plant includes a cylinder body  10  and a supply device  15  for providing high pressure gas. The cylinder body  10  includes a cylinder  11 , a piston  12 , a crank chamber  13  and a crank member  14 . The cylinder  11  has an admission passage  111  and an exhaust passage  112 . An admission valve  113  is arranged in the admission passage  111 , and an exhaust valve  114  is arranged in the exhaust passage  112 . The piston  12  is arranged in the cylinder  11  and moveable therein. The crank chamber  13  is assembled on the cylinder  11  and communicated with the cylinder  11 . The crank member  14  is arranged in the crank chamber  13  and connected with the piston  12  by performable methods. For example, the crank member  14  is connected with the piston  12  through a pole  18 , which is used as a connecting member. Furthermore, the crank member  14  has an axis  141  for serving as an output terminal. 
         [0019]    The supply device  15  for providing the high pressure gas, is arranged adjacent to the cylinder  11 , and communicated with the admission passage  111  of the cylinder  11  for providing the high pressure gas in the cylinder  11 . In this exemplary embodiment, the supply device  15  is a high pressure bottle for schlepping and moving conveniently and being adapted to be amounted on power vehicles or motorcycles. Furthermore, the gas in the supply device  15  can be selected from safe and environmental protection gas. For example, the gas in the supply device  15  can be air, which is cheap and safe, is obtained easily and has no any pollution. 
         [0020]    The admission valve  113  and the exhaust valve  114  can be selected from two different mode valves consisting of mechanical valves and electronic valves. For example, the exhaust valve  114  as shown in  FIGS. 1-4  is a poppet valve, which is a normal mechanical valve, and the admission valve  113  as shown is  FIGS. 1 ,  2  and  5  is a typical solenoid valve. However, the admission valve  113  and the exhaust valve  114  as shown in  FIGS. 1-5  is only used to explain the present invention. Both of the admission valve  113  and the exhaust valve  114  can be selected from the two different mode valves. 
         [0021]    In the embodiment as shown in  FIGS. 1-4 , the exhaust valve  114  is the poppet valve, and is controlled by a valve driving member  16 . The valve driving member  16  includes a cam follower  161 . The cam follower  161  is connected with the axis  141  of the crank member  14  through a transmission group  162 . The transmission group  162  includes a first gear  163 , a second gear  164 , and a chain  165  connected and engaged with the first gear  163  and the second gear  164 . The cam follower  161  of the valve driving member  16  rotates by rotating the output terminal of the crank member  14  to control the exhaust valve  114  (the poppet valve). 
         [0022]    Furthermore, the valve driving member  16  further includes an extending arm  166 . The cam follower  161  can touch the popper valve  114  through the extending arm  166 . The extending arm  166  may be arranged rotatably and coaxially on a pivot seat  167 , and the pivot seat  167  is fixed on a head portion  115  of the cylinder  11 . 
         [0023]    In the embodiment as shown in  FIGS. 1 ,  2  and  5 , the admission valve  113  is the solenoid valve, which is driven by a valve driving member  17 . The valve driving member  17  includes a limited switch  171  and a cam  172  for driving the limited switch  171 . The limited switch  171  is electrically connected with the solenoid valve (the admission valve  113 ). The cam  172  is connected with the output terminal of the crank member  14  and rotates by rotating the output terminal of the crank member  14  to drive the limited switch  171  and control the solenoid valve (the admission valve  113 ). 
         [0024]    Furthermore, a flywheel  19  is arranged at a side of the crank member  14 . 
         [0025]    The operation of the power plant of the present invention is described as following: 
         [0026]    When the piston  12  moves between an upper dead center and 10 degrees before the upper dead center, the admission valve  113  is opened to provide the high pressure gas into the cylinder  11 . At the same time, the exhaust valve  114  is closed. Therefore, at this time, a protrusion  173  of the cam  172  touches the limited switch  171  to open the admission valve  113 . 
         [0027]    When the piston  12  moves between approximate 10 degrees before a lower dead center and the lower dead center, the admission valve  113  is closed to stop providing the high pressure gas. Tests prove the power plant outputs excellently power by closing the admission valve  113  at the 10 degrees before the lower dead center. 
         [0028]    When the piston  12  reaches the lower dead center, the exhaust valve  114  is opened to exhaust the high pressure gas out. 
         [0029]    When the piston  12  reaches 5 degrees before the upper dead center, the exhaust valve  114  is closed. Tests prove it is perfect by closing the exhaust valve  114  at the 10 degrees before the upper dead center. 
         [0030]    When the piston  12  reaches the upper dead center, the above steps repeat. 
         [0031]    In the operation described as the above, since the cylinder  11  has stopped to providing the high pressure gas and the high pressure gas has been exhausted when the piston  12  returns the upper dead center from the lower dead center, the piston  12  can return the upper dead center by inertial power of the crank member  14  and the flywheel  19 . 
         [0032]    The embodiment as shown in  FIGS. 1-5  discloses a power plant having a single cylinder.  FIG. 6  discloses an embodiment having a plurality of cylinders. The plurality of cylinders are arranged in line in  FIG. 6 . However, the plurality of cylinders can be also arranged in parallel, or in V-shape (not shown), etc. 
         [0033]    In the embodiment having four cylinders as shown in  FIG. 6 , a first cylinder  101  and a fourth cylinder  104 , and a second cylinder  102  and a third cylinder  104  respectively admit and exhaust the high pressure gas synchronously for achieving perfect balance and power. 
         [0034]    The embodiments of the present invention employ the high pressure gas to provide high pressure power to the cylinder, and use the admission valve and the exhaust valve to admit and exhaust the high pressure gas to push the piston upwards or downwards and rotate the crank member to produce the power. Therefore, the present invention will not produce greenhouse gas exhausting, have no pollution and be clean. The gas can be obtained conveniently and be cheap. Furthermore, the power plant itself does not produce a superheating problem, and has a simple structure, and decrease the cost. 
         [0035]    The above description is given by way of example, and not limitation. Given the above disclosure, one skilled in the art could devise variations that are within the scope and spirit of the invention disclosed herein, including configurations ways of the recessed portions and materials and/or designs of the attaching structures. Further, the various features of the embodiments disclosed herein can be used alone, or in varying combinations with each other and are not intended to be limited to the specific combination described herein. Thus, the scope of the claims is not to be limited by the illustrated embodiments.