Method for enhancing power of gasoline engine

A gasoline engine and power technology, applied to cylinders, cylinder heads, mechanical equipment, etc., can solve the problems of long cycle, high cost, and large auxiliary workload, and achieve the effects of increasing combustion pressure, high efficiency, and increasing power

Inactive Publication Date: 2011-09-07
SAIC MOTOR
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the existing technology mainly adopts the method of improving the intake port itself to increase the intake air volume by enlarging the inner diameter of the intake port, thereby increasing the engine power, but improving the intake port itself requires a large amount of auxiliary work. Both the water jacket and the water jacket must be improved, involving sand core mold repair, etc., which is not only expensive but also long-term

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  • Method for enhancing power of gasoline engine
  • Method for enhancing power of gasoline engine
  • Method for enhancing power of gasoline engine

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Embodiment Construction

[0014] The following is an embodiment of improving a gasoline engine by using the power boosting method of the present invention.

[0015] The NSE series engine is independently developed by the Shanghai Automotive Technology Center. The power range is 60 kW-120 kW. For example, the rated power of the NSE1.5L SVCT engine is 74.2 kW, which is 4.9% less than the target value of 78 kW, and the maximum torque is 133.4 Nm. The target value of 135N.m is 1.2% smaller, and the liter power is less than 50kW. The power is low among engines of the same displacement at home and abroad.

[0016] By adopting the gasoline engine power improvement method of the present invention, an improvement plan is proposed for the engine: the combined processing shape of the intake and exhaust valve seats is modified, and the intake cam profile is improved from 7.3mm*220deg to 7.7mm*226deg.

[0017] (1) Combined processing shape of intake valve seat. Such as figure 1 As shown, line A in the figure is the origi...

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Abstract

The invention discloses a method for enhancing the power of a gasoline engine. The invention is characterized by enlarging the angle between the circular conical surface of inner wall of an intake valve seat and axis of the intake valve seat and increasing minimum inside diameter of the intake valve seat; enlarging the angle between the circular conical surface of inner wall of an exhaust valve seat and axis of the exhaust valve seat and also increasing minimum inside diameter of the exhaust valve seat; and enlarging outline of admission cam of a camshaft. The invention can achieve the purposeof enhancing the power of the gasoline engine by improving the combination and machining of the intake valve seat and the exhaust valve seat and enhancing the outline of the admission cam, just withimprovement of a few of parts. The invention has the advantages of cost-saving and high efficiency, and is especially suitable for improving the power of gasoline engines with low power and low enginevolumetric efficiency caused by lower inlet channel flow coefficient which is the result of smaller diameter of the inlet channel throat-aperture.

Description

Technical field [0001] The invention belongs to the technical field of gasoline engines, and specifically relates to a method for increasing the power of a gasoline engine. Background technique [0002] A gasoline engine is an electric spark ignition type internal combustion engine that uses gasoline as fuel. In an internal combustion engine, the coordination of the intake and exhaust system, the fuel supply system, and the shape of the combustion chamber is the key to determining the quality of the combustion process. The amount of air entering the cylinder and the flow state of the intake air have an important impact on the power, economy and emission performance of the internal combustion engine. In order to increase the engine power, it is necessary to increase the amount of air entering the cylinder and improve its charging efficiency. Improving engine charging efficiency can be achieved through many methods, such as improving the intake system, using the resonance effect ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02F1/42F01L1/08
Inventor 张小矛周岳康平银生张小虎
Owner SAIC MOTOR
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