Measuring the future of internal combustion engines, Citizen-quality combustion pressure (in-cylinder pressure) sensor.
Our combustion pressure sensor (cylinder pressure sensor) is a sensor developed to measure pressure fluctuations occurring inside the cylinders of internal combustion engines in real-time and with high precision. Due to its high performance and reliability, it has been adopted by various fields, including automotive manufacturers, for research and development as well as in mass-produced vehicles. Main Features: High Precision and High Resolution: It can accurately capture even the slightest pressure changes during the combustion cycle, contributing to a detailed understanding of the engine's combustion state. Wide Measurement Range: There is a lineup that can accommodate various pressure ranges, from low to high pressure. In particular, high-pressure specifications such as 400 bar (approximately 40 MPa) and 800 bar (approximately 80 MPa) are also available, making it suitable for high-performance engines, turbocharged engines, and alternative fuel engines that operate under high-pressure combustion. High-Speed Response: It possesses high-speed response capabilities that can accurately track changes even in phenomena that fluctuate greatly over short periods, such as combustion. High Durability and Long Lifespan: With precision processing and assembly techniques cultivated in watch component manufacturing and strict quality control, it achieves high durability capable of withstanding the harsh environments unique to engines, such as vibrations, thermal shocks, and pressure fluctuations. The company conducts unique durability tests to verify performance in the gigacycle order.
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basic information
Citizen Fine Devices offers a wide range of products that cater to both research and development applications as well as mass-produced automotive applications. Research and Development / Measurement Applications: CAS-05C (for two-wheeled engines, water jacket penetration method) CAS-15A (standard M5 size, stable measurement through internal structure optimization) CAS-15S (standard M5 size, high sensitivity specification: -22 pC/bar) CAS-23A (ultra-small screw M3.5, space-saving) MCZ02/MCX02 (high pressure resistance 800 bar specification) MCZ03/MCX03 (high pressure resistance 400 bar specification) Mass Production Achievements: There is a track record of mass production for general vehicles, including installation in Mazda's SKYACTIV-X engine, demonstrating its quality and reliability. This means that it has passed the rigorous and harsh tests required for automotive applications.
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Applications/Examples of results
The combustion pressure sensors from Citizen Fine Devices are utilized in a wide range of fields due to their high performance and reliability. Automotive Industry: Engine Development: Improving combustion efficiency, reducing emissions, and detecting and suppressing abnormal combustion (such as knocking) in next-generation engines. Development of high compression ratio engines and downsizing turbo engines. Alternative Fuel Engines: Understanding and optimizing the combustion state of engines using various alternative fuels such as hydrogen, ammonia, and e-fuels (synthetic fuels). Integration into Mass Production Vehicles: Providing real-time feedback on combustion pressure in response to requests from the engine control ECU, contributing to optimal engine operation control. Motorsports: Combustion analysis and tuning in high-performance racing engines. Large Engines and Industrial Machinery: Combustion monitoring and control, as well as maintenance in large engines such as marine engines, cogeneration systems (generators), construction machinery, and agricultural machinery. Stable measurements required for long-term continuous use. Research and Development Institutions: Basic research and cutting-edge technology development in universities and research institutions. Analysis of combustion phenomena, development of new combustion methods, and evaluation of fuel characteristics.
Line up（6）
| Model number | overview |
|---|---|
| CAS-05C | Water-cooled jacket through type for two-wheeled engines |
| CAS-15A | Standard M5 size, stable measurement with optimized internal structure. |
| CAS-15S | Standard M5 size, high sensitivity specification: -22 pC/bar |
| CAS-23A | Ultra-small screw M3.5, space-saving. |
| MCZ02/MCX02 | High pressure resistance specification of 800 bar |
| MCZ03/MCX03 | High pressure resistance 400 bar specification |
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Company information
The area where Citizen Fine Devices demonstrates its strength is in the realm of functional components that require small size, precision, high accuracy, and high detail. We believe that our mission is to continue providing high-value-added microdevice products by leveraging the unique technologies we have developed over many years. Utilizing metal processing technology rooted in watch manufacturing, we have consistently supplied small, high-precision components to our customers for many years through a fully integrated production line that encompasses process design, machining, assembly, and functional testing, along with the unique development of our own processing machines. Additionally, mass-producing components with high precision and efficiency using brittle materials is also one of our core technologies. By integrating material technology with ultra-precision machining, thin-film technology, and bonding technology, we produce not only high-precision components such as ceramics and quartz but also high-quality functional device products like liquid crystal devices and sensing devices. Continuing to provide high-value-added products to the market is a significant dream for our employees. We will contribute to the creation of new value through manufacturing driven by the challenge spirit of each individual, working towards the realization of that dream.