Engine timing chain system assembly tool and an assembly method

A technology of assembly tooling and assembly method, which is applied in the field of engine timing chain system assembly tooling and assembly, and can solve the problems of increased phase deviation between camshaft and sprocket, increased phase deviation between crankshaft sprocket and camshaft sprocket, timing Problems such as chain elongation are not avoided, achieving the effect of reducing phase deviation, improving assembly positioning accuracy, and reducing timing mark design

Active Publication Date: 2015-04-08
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reasons include: if the camshaft and the sprocket are positioned by pins, the phase deviation between the camshaft and the sprocket will increase due to the positional deviation after the pin hole is processed
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  • Engine timing chain system assembly tool and an assembly method
  • Engine timing chain system assembly tool and an assembly method
  • Engine timing chain system assembly tool and an assembly method

Examples

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[0050] The present invention will be further elaborated below with reference to the accompanying drawings and embodiments. The following embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0051] Such as figure 1 The engine timing chain system assembly tool shown includes a crankshaft timing tool 17, a camshaft timing tool 16 and a tensioner tool 11.

[0052] The front journal of the crankshaft is machined with a keyway, which is assembled and positioned with the crankshaft timing sprocket through the semicircular key. Two pin holes are machined on the rear end of the crankshaft for positioning the crankshaft timing tooling.

[0053] See image 3 , Figure 4 , The crankshaft timing tool 17 includes a flange body 171, a connecting arm 172 and a pin 19, two positioning pins 173 are provided on the inner end of the flange body, and the two positioning pins are connected to the center of the fla...

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Abstract

The invention discloses an engine timing chain system assembly tool and an assembly method. The assembly tool comprises a crank timing tool, a cam shaft timing tool and a tensioner tool. Through the adoption of the assembly tool provided by the invention, the assembly positioning accuracy can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of engine manufacturing, in particular to an assembly tool and an assembly method for an engine timing chain system. Background technique [0002] Engine valve timing is based on the top dead center or bottom dead center of the piston, and the timing of opening and closing of the intake and exhaust valves is measured by the crankshaft angle. In the manufacturing process, due to the existence of component manufacturing deviations, engine assembly deviations, and sensor signal induction deviations, the originally specified valve timing will be changed to varying degrees, such as delayed or advanced valve opening and closing times, and disordered intake and exhaust phases. Wait. The phase deviation will lead to the decline of engine power, poor economy and emission deterioration. When the phase deviation is large, the engine cannot be started at all. In severe cases, the piston will hit the valve, the valve st...

Claims

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Application Information

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IPC IPC(8): B25B27/22
CPCB25B27/22
Inventor 张云富李春肖航黄参何海珠
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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