Zhejiang Boxing Industry and Trade Co.,Ltd

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Company name:Zhejiang Boxing Industry and Trade Co.,Ltd
Address:No. 1188, Meihe Rd, Jinhua City, Zhejiang Province, 321017, China
Contact:Eric Ge
phone:0579-83930777
Phone:13484085502
Fax:0579-83930555
E-mail:sales@zjfourslar.com
Website: www.bo-xingcamshaft.com
www.zifourstar.com

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Camshaft Strength And Reliable Support Requirements Are High

The camshaft is an important part of the engine air distribution mechanism. In order to ensure that the engine work can be timely inhalation of fresh air, and timely discharge of the exhaust gas, the camshaft is responsible for driving the valve on and off on time, some camshaft also has the function of driving the distributor rotation. The speed of the car engine is very high, in order to ensure the efficiency of intake and exhaust, the valve with overhead design, the camshaft through the hydraulic tappet and other institutions to drive the valve action.

Camshaft structure

Although the speed of the camshaft is half the speed of the crankshaft in a four-stroke engine, its speed is still high and requires a lot of torque, so the requirements for the strength and reliability of the camshaft are high. The main body of the camshaft is a cylinder with the same length as the cylinder block. There are a number of cams. The material of the camshaft is usually special cast iron, sometimes made of forged and alloy. Most of the interior of the camshaft is made into a hollow structure, which not only reduces the quality of the camshaft, but also improves the ability of the cam bearing to be loaded. The camshaft is also machined with a lubricating oil passage, which is lubricated by the camshaft, rocker shaft, and rocker arm. Figure 1 shows the camshaft used by the Mitsubishi 4G63 DOHC engine.

The function is to detect the position and corner of the camshaft to determine the position of the top dead center of the compression stroke of the engine 1 cylinder. At start-up, the engine ECU recognizes the position and stroke of the cylinder piston, controls the fuel injection sequence and the ignition sequence based on the signals provided by the camshaft position sensor and the crankshaft position sensor, and performs accurate fuel injection and ignition control.

When the camshaft position sensor signal is interrupted, the control unit receives the crankshaft position signal can only identify a certain crankshaft corner to reach the top dead center of the cylinder, but I do not know which of the 1,4 cylinder is the compression stroke Only point. The control unit can still be fueled, but is changed from sequential injection to simultaneous injection. The control unit can still ignite, but the ignition timing is postponed to an absolute non-knocking safety angle. At this time the engine power and torque will be reduced, driving the feeling is to accelerate bad, fail to achieve the maximum speed, fuel consumption increased, idle instability.


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Address:No,1188 , Meihe Rd, Jinhua City, Zhejiang Province , 321017,China

Tel:+86-0579-83930777

Fax:+86-0579-83930555

E-mail:sales@zjfourslar.com

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Company Info

ZHEJIANG BO XING INDUSTRY AND TRADE CO., LTD, proformly called “ZHEJIANG SIXING MACHINING CO., LTD”was founded in 1995, is located in Jinhua city, Zhejiang Province.,There are 400 kilometers from Shanghai port , and about 250 kilometers from Ningbo port in distance.
. Our company covers an area about 35000 square meters with total assets about RMB 150 million Yuan, the building area is about 27000 square meters. There are 550 employees, including more than 60 people who are senior and middle level professional persons.
The Company specialized in producing camshafts and balance shafts of car engines, motorcycle engines, general-use gasoline engines, diesel engine. the annual productivity is about 4.5 million pieces. it has a regular organization, which consists of nine functional departments,, a foundry, three machine plants in the company .
Our company has 450 sets of various types of production equipment, such as CNC cam grinding machines,, CNC lathes, CNC hobbing machines, CNC gear shaving machines, CNC cylindrical grinders, CNC milling machines,, automatic washing machine, etc. The equipment number centralized ratio is over 75%, in 2012s, we company purchese one set of auto cam grinder from Toyoda of Japan whose number is GC20M-63 .
It has enough capability for self-supporting the blank of camshafts and cast pieces. The company's foundry is equipped with a vertical-type non-pressure molding line box shot (ZZ416A) and has an annual output

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Zhejiang Boxing Industry and Trade Co.,Ltd