JWFROEHLICH company developed a cylinder block and cylinder head assembly as early as 1968And the automatic leak testing line. Subsequently, computer-controlled transmission and engine function testing systems were developed successively. After entering the 1990s, JWFROEHLICH company successfully developed a engine cold testing system using modern technology and quickly promoted it. During this period, various leak testers with different measurement principles were also developed and continuously upgraded, and their performance and quality are at the forefront of the world. For decades, JWFROEHLICH has provided a large amount of equipment and technical support to well-known automobile manufacturers such as Mercedes Benz, BMW, Volkswagen, Ford, Opel, Volvo, and General Motors, enjoying a high reputation in the industry.

Based on the pressure drop method and flow rate method, flexible and accurate leak testing solutions can be configured according to the testing requirements for both standard testing and complex structure testing.

One flow method: quality flow standard method and quality flow large range method

1. Quality flow standard method:

When using the mass flow method, the reference volume VEX is first filled with test air. When the test workpiece is filled and reaches equilibrium, the mass flow sensor immediately provides measurement results when leakage may occur. Therefore, compared with the pressure drop method, this method is the best testing method for large and medium-sized volumes and short periods of time. At the same time, the measurement repeatability of this method is relatively high.

Test pressure:- 0.8 to 6 bar

Test workpieces: cylinder head/body, water passage, low-pressure oil passage, engine, gearbox, fuel tank, etc

2. Mass Flow Mass Process Method

Using a large range measurement method, the mechanical pressure regulator sets the test pressure and tests for leaks with a constant test pressure. This method is particularly suitable for testing workpieces with high leakage rates.

Test pressure:- 0.8 to 5 bar

Test workpieces: cylinder head, valve seat ring, etc

Model of secondary leak tester: