What is a valve lifter?

Tappet

The tappet is the main component of the valve mechanism. One end is in contact with the cam, and the other end is in contact with the valve. It can use the oil pressure to transmit the force on the camshaft to the valve.

Valve clearance

In order to ensure that the valve closes tightly, there is a proper gap between the valve rod end and the valve driver (rocker arm, tappet or cam), which is called valve clearance.

Principle of operation

The tappet on the old engine is equipped with an adjustment screw and a lock nut at one end to adjust the valve clearance, while the hydraulic tappet omits the adjustment screw and the lock nut and replaces the role of these rigid parts with hydraulic adjustment.　　

The hydraulic tappet is always in contact with the camshaft and runs without clearance. The inside of the tappet uses hydraulic pressure to adjust the gap. The hydraulic tappet is mainly composed of a plunger, a one-way valve and a one-way valve spring. The one-way valve is used to store or release oil. By changing the oil pressure in the tappet body cavity, the working length of the hydraulic tappet can be changed. Play the role of automatically adjusting the valve clearance.

Through the oil leakage and replenishment in the tappet body cavity, the working length of the tappet is continuously and automatically adjusted to keep the valve working normally without gaps in the entire mechanism, reducing the impact and noise between parts, and eliminating the old engine valve The ills of the gap. At the same time, the use of hydraulic tappets can make the camshaft profile a bit steeper, making the valve opening and closing faster, and more in line with the requirements of modern high-speed engines.

02                Wenzhou Yangchen Auto Parts Manufacturing Co., Ltd.

Company Profile

Wenzhou Yangchen Auto Parts Manufacturing Co., Ltd. is a precision machinery product manufacturer, an auto parts company integrating research, development, and manufacturing.

Yangchen specializes in manufacturing automobile engine hydraulic tappets, mechanical tappets, tensioners, rocker arms and other precision mechanical products.

Technology and Talent

The company has a good business environment and highly qualified professionals, equipped with more than 100 sets of various production equipment and testing instruments.

A number of company proprietary technologies and a batch of self-developed special production equipment, and passed the TS16949 system in 2013.

In the aspect of deep and long blind hole grinding, its equipment and technology have reached the current domestic advanced and international leading level.

company's product

At present, the company has more than 200 varieties of products, covering more than 80% of the global tappet products, which are exported to all over the world, such as Britain, Russia, the United States, South Korea, Venezuela, Germany, etc.

image The company has always adhered to the quality policy of "quality first, excellence, and customer first", strictly control product quality, and constantly improve the quality assurance system. image Based on the development of the auto parts industry with high quality and high reputation, we will create a new brand in the auto parts industry. image image

The company has always adhered to the quality policy of "quality first, excellence, and customer first", strictly control product quality, and constantly improve the quality assurance system.

  Based on the development of the auto parts industry with high quality and high reputation, we will create a new brand in the auto parts industry.

           With the continuous pursuit of science and technology, Yangchen

              And years of honest management in the auto parts industry,

                               With my sincerity and credibility

                  Has won the approval and trust of many customers.

                        Yangchen will continue to learn and absorb

          Advanced scientific and technological knowledge at home and abroad

         And excellent management experience, make every effort to create                  prosperity,

        Create a beautiful and prosperous future together.