| 摘要 |
A temperature distribution of fuel flowing through a delivery pipe is detected by two fuel temperature sensors provided in the delivery pipe and a fuel tank. When this temperature distribution exceeds an allowable range, adjusted pressure pumping processing in which an amount of fuel corresponding to an injection amount is pumped is stopped and quantitative pressure pumping processing is begun. In quantitative pressure pumping, a rate of fuel flowing through the delivery pipe is increased to an amount exceeding an amount of fuel injected from injectors. With this feature, an amount of fuel flowing through the delivery pipe is greatly increased, a temperature rise rate due to thermal energy from the engine is lowered, and the range of temperature distribution of fuel is narrowed down as a whole. Therefore, differences in output torque among the cylinders is reduced, and variations in the revolution of the engine are suppressed or prevented.
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