TY - CHAP

T1 - Sensing of the Engine Cylinder Valves Motion

AU - Behre, Leander

AU - Mercorelli, Paolo

N1 - Conference code: 3

PY - 2016/11/15

Y1 - 2016/11/15

N2 - This paper deals with all required parts to set up the full variable valve train (FVVT) system to be used in intake and exhaust valves of combustion engines from the electrical/electronic point of view. This includes the displacement and pressure sensors that are needed to conduct research on the fully variable valve train while in operation and the electronic auxiliaries such as the amplifier for the piezo actuator, the dSPACE control system and the used function generator. In particular, the use of displacement transducers for all relevant pistons and stems is crucial for the FVVT system control. As only the piezo actuator is equipped with a displacement sensor, the remaining sensors still need to be chosen. Within the previous FVVT system two different displacement sensors have been used on the engine valve stem. Three displacement sensors and one pressure sensor are implemented into the mechanical core of the system (consisting of lever transmission, control unit, servo valve and engine valve body), which is driven by the piezo actuator and supplied with hydraulic pressure by a pump, that requires a 230 V power supply and a tank, which the hydraulic fluid can return to. While the pressure sensor monitors the hydraulic pressure within the lever transmission, displacement sensors need to be chosen to monitor the motion of the (1) control piston in the control unit; (2) servo piston within the servo valve; (3) engine valves. Measured results are presented.

AB - This paper deals with all required parts to set up the full variable valve train (FVVT) system to be used in intake and exhaust valves of combustion engines from the electrical/electronic point of view. This includes the displacement and pressure sensors that are needed to conduct research on the fully variable valve train while in operation and the electronic auxiliaries such as the amplifier for the piezo actuator, the dSPACE control system and the used function generator. In particular, the use of displacement transducers for all relevant pistons and stems is crucial for the FVVT system control. As only the piezo actuator is equipped with a displacement sensor, the remaining sensors still need to be chosen. Within the previous FVVT system two different displacement sensors have been used on the engine valve stem. Three displacement sensors and one pressure sensor are implemented into the mechanical core of the system (consisting of lever transmission, control unit, servo valve and engine valve body), which is driven by the piezo actuator and supplied with hydraulic pressure by a pump, that requires a 230 V power supply and a tank, which the hydraulic fluid can return to. While the pressure sensor monitors the hydraulic pressure within the lever transmission, displacement sensors need to be chosen to monitor the motion of the (1) control piston in the control unit; (2) servo piston within the servo valve; (3) engine valves. Measured results are presented.

KW - Engineering

KW - application

KW - position sensing

KW - combustion engines

KW - actuation

U2 - 10.3390/ecsa-3-E013

DO - 10.3390/ecsa-3-E013

M3 - Article in conference proceedings

T3 - Proceedings

BT - Proceedings of the 3rd International Electronic Conference on Sensors and Applications

A2 - Mariani, Stefano

A2 - Ciucci, Francesco

A2 - Lehmhus, Dirk

A2 - B. Messervey, Thomas

A2 - Vallan, Alberto

A2 - Bosse, Stefan

PB - MDPI AG

T2 - 3rd International Electronic Conference on Sensors and Applications

Y2 - 15 November 2016 through 30 November 2016

ER -