67results about How to "Reduce pumping loss" patented technology

A variable air exhaust through flow area air exhaust pressure control type adjusting mechanism for a turbocharged engine belongs to the technical field of mechanical design and comprises an air compressor, an engine, a turbine, a volume cavity, a rotation body, a spring, a rotation rod, a rotation shaft and a rotation plate. The longitudinal sections of the volume cavity and the rotation body are both in arc shapes, the rotation plate is installed in an air exhaust pipe, the rotation plate and the rotation shaft are fixed together, the left wall of the rotation body is connected with the left wall of the volume cavity through the spring, and two ends of a connection pipe are respectively communicated with the right wall of the volume cavity and the air exhaust pipe. When pressure in the air exhaust pipe in front of the rotation plate is high, the rotation body drives the rotation plate to rotate in a counterclockwise mode, pumping loss of the engine is small, and the whole performance is excellent. When pressure in the air exhaust pipe in front of the rotation plate is low, the rotation body drives the rotation plate to rotate in a clockwise mode, available energy in front of the turbine is more, air inlet pressure of the engine is high, and the whole performance is excellent. The variable air exhaust through flow area air exhaust pressure control type adjusting mechanism for the turbocharged engine is reasonable in design, simple in structure and suitable for a turbine single inlet turbocharged system.

The invention relates to a lift device for variable valves, comprising a valve arranged in the air passage of cylinder cover, a cam rotated synchronously with the engine crankshaft and a valve spring sleeved on the valve, which is characterized in that an upper seat of the spring is arranged on the upper end of the valve spring; the upper seat of the spring is fixedly connected with the valve; the lower end of the valve spring is arranged in the cylinder cover through the lower seat cup of the spring; a lever mechanism for controlling the valve action conveniently is connected between the cam and the valve. The lift device for variable valves has the advantages that the purpose of controlling valve action can be reached by adding a lever mechanism, the device is simple in structure and convenient in control, can reduce the pumping loss and the fuel oil consumption of engine.

A variable valve mechanism includes a low-speed cam, a high-speed cam, a low-speed rocker arm driven by the low-speed cam, a high-speed rocker arm driven by the high-speed cam, and a switching mechanism. A cam profile of the high-speed cam is set such that it does not exceed a cam profile of the low-speed cam. During low-speed operation, the switching mechanism links the low-speed and the high-speed rocker arms such that the low-speed cam causes the high-speed rocker arm to rock together with the low-speed rocker arm and to open and close a valve. During high-speed operation, the switching mechanism de-links the low-speed rocker arm and the high-speed rocker arm such that the low-speed cam causes the low-speed rocker arm to rock idly and the high-speed cam causes the high-speed rocker arm to rock independently and to open and close the valve. The cam profile of the low-speed cam is set such that the valve closes later than it does with the cam profile of the high-speed cam.

The invention relates to an ignition type engine throttle-valve-free air intake system. The system comprises an air intake pipe (2), a pressurizer (4), an intercooler (7), an intercooler air outlet pipe (5) and an engine (1) which communicate in sequence. The pressurizer (4), the intercooler (7) and the engine (1) are connected with an electronic control unit (9), the air intake pipe (2) and the intercooler air outlet pipe (5) communicate through a butterfly valve (6), and the electronic control unit (9) carries out opening degree control over the butterfly valve (6). Compared with the prior art, a throttle valve is not needed, engine pump gas losses are reduced, and the economic property of the engine is improved.

A six-stroke cycle engine includes an intake passage including a downstream end connected to a combustion chamber and no throttle valve therein, and an exhaust passage including a catalyst and an upstream end connected to the combustion chamber. The six-stroke cycle engine includes a first valve configured to open and close the intake passage, a second valve configured to open and close the exhaust passage, a valve gear configured to operate the first valve and the second valve so that an intake stroke, a compression stroke, an expansion stroke, and an exhaust stroke are executed, in this order, and to operate only the first valve so that a scavenging intake stroke and a scavenging exhaust stroke are executed, in this order, following the exhaust stroke. The valve gear includes a variable valve mechanism configured to continuously change an opening and closing timing and a lift amount of the first valve.

The invention relates to a double-turbine coaxially-connected device which belongs to the technical field of internal-combustion engines. The double-turbine coaxially-connected device comprises air compressors, an air inlet pipe, an engine, an air exhaust pipe, turbines, a volume cavity, a connecting pipe, a movable body, a spring and through tubes, wherein the movable body is arranged in the volume cavity and is hermetically contact with the inner wall surface of the volume cavity; the first through tube and the second through tube both penetrate through the upper wall surface and the lower wall surface of the movable body; and the right wall surface of the movable body is connected with the right wall surface of the volume cavity through the spring. When the engine is under a high-speed working condition, the movable body moves towards right, the first air compressor, the second air compressor, the first turbine and the second turbine work simultaneously, and the engine is lower in pumping loss, so that the engine is better in overall machine performance; when the engine is under a low-speed working condition, the movable body moves towards left, only the first air compressor and the first turbine work, pulse energy is sufficiently utilized, and the engine is higher in inlet pressure, so that the engine is better in overall machine performance. The double-turbine coaxially-connected device is reasonable in design, simple in structure and suitable for a turbocharging system with double turbines and double air compressors.

The invention provides a pneumatic elastic pressure regulating device, and belongs to the technical field of internal combustion engines. The device comprises an air discharging tube, a rotating shaft, a rotating plate, a regulating rod, a control cavity, a spring, moving bodies and a control tube; one end of the first control tube passes through the upper wall surface of the control cavity to be communicated with a cavity between the first moving body and the second moving body; the other end of the first control tube is communicated with an exhaust tube between an engine and a turbine; one end of the second control tube passes through the right wall surface of the control cavity to be communicated with an inner cavity; the other end of the second control tube is communicated with the exhaust tube between the turbine and a muffler. According to the device, the air discharging quantity of the turbine is large while the engine has a large load; the air discharging quantity of the turbine is small while the engine has a small load. The device is reasonable in design, simple in structure, and suitable for design of an engine turbine boosting system.

A crank chamber communication structure for a multi-cylinder internal combustion engine having a plurality of partition walls that are formed by a cylinder block and a crankcase, that are formed to support a crankshaft and to define a plurality of crank chambers that correspond to the plurality of cylinders, the structure including: a plurality of respective first communicating holes formed in the plurality of partition walls for communication between respective pairs of adjoining crank chambers separated by an interposed partition wall; and a second communicating hole that is formed at least either of the cylinder block or the crankcase, and that is interposed between a pair of non-adjoining crank chambers between which at least two partition walls among the plurality of partition walls are interposed for direct communication between the pair of non-adjoining crank chambers.

A six-stroke cycle engine includes an intake passage including a throttle valve, and an exhaust passage including a catalyst. The six-stroke cycle engine includes a scavenging passage including a first end defined by a scavenging port and a second other end connected to the intake passage upstream of the throttle valve. The six-stroke cycle engine includes an intake valve, an exhaust valve, a scavenging valve, and a valve gear configured to operate these valves. The valve gear closes the scavenging valve and operates the intake valve and the exhaust valve so as to execute an intake stroke, a compression stroke, an expansion stroke, and an exhaust stroke, in this order. The valve gear also operates only the scavenging valve so as to execute a scavenging intake stroke and a scavenging exhaust stroke, in this order, following the exhaust stroke.