초록 ▼

In a fuel supply device which supplies fuel in a main tank (8) to a vehicle engine (20), a fractional distiller (9) fractionates the fuel in the main tank (8) into a high octane fuel component and a low octane fuel component, and stores these fuel components in subtanks (10, 11). The high octane fue

In a fuel supply device which supplies fuel in a main tank (8) to a vehicle engine (20), a fractional distiller (9) fractionates the fuel in the main tank (8) into a high octane fuel component and a low octane fuel component, and stores these fuel components in subtanks (10, 11). The high octane fuel component is supplied by a high pressure intermittent pump (16), and the low octane fuel component is supplied by a variable pressure pump (15), to a fuel injector (17) of the engine (20). A controller (1) identifies a running region by the rotation speed and load of the engine (20), determines the proportion of fuel components supplied to the engine (20) according to the identified running region and controls a discharge pressure of the variable pressure pump (15) so that the determined proportion is achieved. When the storage amount of one of the subtanks (10, 11) falls below a minimum value, the proportion of fuel components supplied to the engine (20) from the other subtank (11, 10) is increased.

대표청구항 ▼

[ What is claimed is:] [1.]1. An apparatus for supplying fuel in a fuel tank to an internal combustion engine, comprising:a separating device which separates fuel in the fuel tank into plural fuel components;a sensor which detects a running condition of the engine; anda mechanism which supplies the

[ What is claimed is:] [1.]1. An apparatus for supplying fuel in a fuel tank to an internal combustion engine, comprising:a separating device which separates fuel in the fuel tank into plural fuel components;a sensor which detects a running condition of the engine; anda mechanism which supplies the plural fuel components to the engine in different proportions depending on the running condition;wherein the supply mechanism comprises a microprocessor programmed to determine a proportion of the fuel components supplied to the engine based on the running condition, and a fuel injector which injects the plural fuel components according to the proportion determined by the microprocessor;wherein the plural fuel components comprise a high octane fuel component and a low octane fuel component which has a lower octane number than the high octane fuel component, and the sensor comprises a sensor which detects a load of the engine, and a sensor which detects a rotation speed of the engine;wherein the engine comprises an engine which performs compression self-ignition, and the microprocessor is further programmed to increase the high octane fuel component in the fuel components supplied to the engine when the load of the engine is in a predetermined first load region, and increase the low octane fuel component in the fuel components supplied to the engine when the load of the engine is in a second load region which corresponds to lower loads than the first load region.