Patent ID: 8089629
Filing Date: 2012-01-03
Classification: G01N

Abstract:
1. A fuel property detection apparatus that detects biofuel concentration in a mixture of hydrocarbon fuel and biofuel, comprising: optical transmittance detection means for detecting optical transmittance of the fuel mixture with respect to light within a wavelength range of 640 nm to 680 nm; and concentration calculation means for calculating the biofuel concentration in the fuel mixture on the basis of the optical transmittance detected by the optical transmittance detection means, wherein the optical transmittance detection means includes a light-emitting device, which emits light for detecting the optical transmittance; and a corrective light-receiving device, which detects the amount of light emitted from the light-emitting device in order to correct the influence of a change in the amount of light emitted from the light-emitting device.