Four-stroke internal combustion engine including exhaust cam provided with two bulges
A technology of four-stroke internal combustion engine and exhaust cam, which is applied to internal combustion piston engines, combustion engines, mechanical equipment, etc., can solve the problems of waste, low thermal efficiency of internal combustion engines, etc., and achieve the effect of reducing load, increasing power, and reducing design capacity
Inactive Publication Date: 2013-01-02
周同庆
View PDF8 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The energy taken away by the cooling system also accounts for about one-third of the energy produced by fuel combustion, causing huge waste
Therefore, the thermal efficiency of existing internal combustion engines is relatively low
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0033] see Figures 1A-1E , which shows a first embodiment according to the present invention, which relates to a four-stroke in-cylinder direct injection gasoline engine comprising a cylinder head and a cylinder block in which a fuel injector 40 and a spark plug are arranged. 30, and also has a valve train including an intake system and an exhaust system. The cylinder block is provided with a plurality of cylinders 48, and each cylinder 48 is provided with a piston 44, and the piston 44 can reciprocate along the cylinder wall in the cylinder.
[0034] The intake system includes an intake valve 36 , an intake valve driving member 33 and a camshaft 11 , and the camshaft 11 is provided with an intake cam 13 that can drive the intake valve 36 to open via the intake valve driving member 33 . Similarly, the exhaust system includes an exhaust valve 37 , an exhaust valve driving member 39 and a camshaft 12 . cam 16.
[0035] Wherein, each exhaust cam 16 has a main protrusion 18 and...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a four-stroke internal combustion engine including an exhaust cam provided with two bulges. An exhaust camshaft is provided with an exhaust cam capable of driving an exhaust valve to be opened by a driving part. Each exhaust cam is provided with a main bulge and an auxiliary bulge. The main bulge drives the exhaust valve to be opened so as to emit combustion gas in the operational exhaust strokes of the internal combustion engine, and the auxiliary bulge drives the exhaust valve to be opened so as to emit a part of air not participating in combustion in the starting stage of operational compression stroke of the internal combustion engine. The maximum lift amount generated by the exhaust valve, enabled by the main bulge, is larger than that generated by the exhaust valve, enabled by the auxiliary bulge, time for exhausting combustion gas is longer than that for exhausting air not participating in combustion. Especially, the four-stroke internal combustion engine is of a four-stroke gasoline direct injection engine, or a four-stroke diesel engine.
Description
technical field [0001] The present invention relates to a four-stroke internal combustion engine comprising an exhaust cam with two protrusions, the combustion gas expansion ratio is higher than the fresh air compression ratio, in particular, the present invention relates to a four-stroke diesel engine and a direct injection type four-stroke gasoline engine. Background technique [0002] A four-stroke diesel engine is a well known internal combustion engine in which the thermal energy released by the combustion of diesel in cylinders is converted into mechanical energy. [0003] In a diesel engine, pure air is compressed inside the cylinder, and at the end of the compression stroke, diesel fuel is injected into the combustion chamber and ignited when encountering high temperature compressed air. The high-temperature and high-pressure gas produced by the combustion of diesel fuel in hot air expands rapidly, pushing the piston down. Through the action of the connecting rod, ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/08
CPCY02T10/18Y02T10/125F02B17/005F01L1/0532F01L2800/00F02B23/101F01L1/143F02D13/0242F01L2001/0537F01L2800/19F01L1/08F02D13/0273Y02T10/12
Inventor 周同庆
Owner 周同庆