Accurate measurements of processes in the combustion chamber
The optical probes capture the radiation given off by combustion in the combustion chamber as light intensity, which an amplifier then converts into a voltage signal. Thanks to the high sensitivity of the fiber-optic system, processes can be mapped during idling and cold starting, or also directly after ignition. Clear visualization of the defined parameters gives users a deeper understanding of the processes in the combustion chamber – the basis for optimizing many settings, e.g. for injection systems and ignition timing.
The world's smallest piezoelectric cylinder pressure sensor
Because the ultra-compact high-temperature pressure sensor is integrated in the spark plug, there is no need for additional bore holes in the cylinder head. The transducer is mounted almost flush with the combustion chamber, and its natural acoustic frequency of about 65 kHz also makes it suitable for indication at high speeds and for investigations of knocking. It features a pressure range from 0 to 200 bar and an operating temperature range from –20 to 350°C.
An integrated solution that delivers efficiency gains in development
The combination of pressure and light measurement technology in one integrated product cuts costs and saves time in engine development – and it also supplies a holistic picture of processes in the combustion chamber. Key features and benefits at a glance:
- Combination of cylinder pressure measurement and optical combustion analysis
- Integrated, compact and rugged design with no extra measuring bore hole
- Eight optical windows onto the combustion chamber (radial and/or axial observation directions)
- Integrated miniature cylinder pressure sensor (3 mm)
- Various thread sizes, heat values, spark positions and electrode spacings are possible
The solution is completed by an amplifier for the fiber optics, a piezoelectric amplifier for the cylinder pressure measurement, and a combined data acquisition and evaluation system. Kistler offers its customers the entire measuring chain from one single source.