Fuel injection control device

Abstract

Abstract PURPOSE:To regularly conduct precise fuel injection control by controlling the injection quantity at the time of failure of a means for detecting the alcohol concentration in a fuel on the basis of the alcohol concentration in a newly supplied fuel, when oil feed is conducted at the time of the failure. CONSTITUTION:An alcohol mixed fuel in a fuel tank A is supplied from an injection valve D to an engine E through a fuel piping C by a fuel pump B. In the above constitution, the residual quantity of the fuel in the fuel tank A is detected by a means F, and the alcohol concentration in the fuel is detected by a means G. A failure of the means G is judged by a means H, and whether oil feed was conducted or not at the time of this failure judgment is made by a means I. When the oil feed was conducted at the time of the failure, the concentration of a new fuel is calculated by a means 7 on the basis of the fuel residual quantity before oil feed, the new feed quantity, and the alcohol concentration before the failure. Thereafter, the injection quantity at the time of the failure is controlled by a means K on the basis of the alcohol concentration of the new fuel.

Inventors

• 👤 Susumu Kurihara
• 👤 将 栗原

Bibliographic Details