This is a testing machine that allows for testing a device for controlling the intake and exhaust system of an engine using simple vibrations, assuming a real engine.
To generate pulsating flow that can accommodate low to high engine speeds, a cross-flow rotary cylinder valve capable of producing four pulses per revolution is used. By varying the rotation speed of this valve, a wide range of pulsation frequencies can be achieved. The basic flow rate that serves as the foundation for the pulsating flow is adjusted by a valve installed in a bypass circuit connected in parallel with the pulsating flow generation circuit, allowing the flow rate to be changed by adjusting the valve opening.
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basic information
Overview It is generally used in combination with a steady flow test stand that generates a known flow rate. Features A rotary cross-flow type rotary cylinder valve is used to generate pulsating flow. The base flow rate is adjusted by the valve opening of the bypass circuit. The main flow rate and pressure are adjusted on the steady flow test stand side. Pulsation frequency: 20 to 400 Hz Characteristics of this method Compared to butterfly-type rotary valves, it allows for a longer closure period of the valve, enabling the generation of pulsating waves that are closer to those of an engine. By providing a cross-shaped flow path in the cylindrical rotor, it can generate pulsating flow with a higher frequency suitable for high-revving engines. Since the flow path is set to the same size as the upstream and downstream piping diameter, pressure loss due to the rotary valve can be minimized.
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Applications/Examples of results
Application Flow testing of air flow meters for engines Flow performance testing of EGR valves Performance testing of devices for controlling engine intake and exhaust systems FAQ What is the durability of the rotary valve? It varies depending on operating conditions, but it is approximately 20,000 hours. How long can the rotary valve operate continuously at maximum rotation? Continuous operation at maximum rotation should be limited to about 10 minutes. When operating for long periods continuously; Please supply compressed air or cold water to the internal cooling fins to cool the bearing section while in use. Is there any leakage from the bearings of the rotary valve? There is a slight leakage. However, flow accuracy of 1% can be sufficiently maintained.
Detailed information
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Generally used in combination with a steady flow test stand that generates a known flow rate. Features: - A rotary cross-flow type rotary cylinder valve is used to generate pulsating flow. - The base flow rate is adjusted by the valve opening of the bypass circuit. - Main flow rate and pressure are adjusted on the steady flow test stand side. - Pulsation generation frequency: 20 to 400 Hz.
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Application Flow rate test for air flow meter for engine Flow performance test for EGR valve Performance test for devices controlling engine intake and exhaust systems
Company information
Tsukasa Measurement Research Co., Ltd. specializes in products that measure fundamental physical quantities such as pressure and flow, and has contributed to many research and development projects to date. In particular, in the automotive industry, we have developed and manufactured numerous measuring instruments used for performance testing, such as CVS devices, contributing to the advancement of the industry. Please feel free to consult us if you have any requests.
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