LIQUEFIED GAS FUEL SUPPLYING APPARATUS

摘要

A liquefied gas fuel supplying apparatus includes an injector that injects fuel to an engine, a fuel tank that stores the fuel, a fuel pump that pumps the fuel from the fuel tank to the injector, a fuel cooler that cools the fuel that is pumped from the fuel pump to the injector, a fuel temperature sensor that detects a fuel temperature in a pipe, and an ECU. The ECU, during engine operation, estimates the fuel temperature in the pipe after engine stop, based on a detection value detected by the fuel temperature sensor, and performs drive control of the fuel cooler to cool the fuel, when the estimated temperature is higher than a temperature that is evaluated from a predetermined saturated vapor pressure curve.

主权项

1. A liquefied gas fuel supplying apparatus comprising:
an injector configured to perform injection supply of liquefied gas fuel to an engine; a fuel tank configured to store the liquefied gas fuel; a fuel pump configured to pump the liquefied gas fuel stored in the fuel tank, to the injector through a pipe; a fuel cooler configured to cool the liquefied gas fuel that is pumped from the fuel pump to the injector through the pipe; a fuel temperature detector configured to detect a temperature of the liquefied gas fuel in the pipe positioned on a downstream side relative to the fuel cooler; and an electronic control unit configured to: (i) determine whether the liquefied gas fuel in the pipe positioned on the downstream side relative to the fuel cooler vaporizes after the engine is stopped, based on a detection value detected by the fuel temperature detector, the detection value being a detection value while the engine is operated; and (ii) perform drive control of the fuel cooler to cool the liquefied gas fuel, when the electronic control unit determines that the liquefied gas fuel vaporizes.