Answer :
Option A is correct.
The electronic principle used in rail pressure sensors for CR diesel fuel systems is piezoresistive, which employs the deformation of a crystal sensor to measure pressure changes.
The electronic principle used in the rail pressure sensor fitted to most Common Rail (CR) diesel fuel systems is piezoresistive. Piezoelectric sensors are a category of pressure sensors that utilize the piezoresistive effect of crystal sensors. When pressure is applied to these crystals, they deform, and this deformation leads to the generation of an electric charge. The charge produced is then measured and is proportional to the pressure applied. Piezoelectric sensors have a quick response time to changes in pressure and are incredibly sensitive. They come with a wide pressure range between 0.021 to 100 MPa and a sensitivity of 0.1 MPa, making them ideal for applications where rapid detection of pressure changes is critical.
