Toyota Jidosha Kabushiki Kaisha

Denso Corporation

Toru Suda

Koji Yoshida

Tetsuji Nagata

Rintarou Tachibana

Katsunori Kamiya

A controller of a control device of an internal combustion engine includes: a storage configured to store fuel pressure detected during injection of one port injection valve of port injection valves in association with another port injection valve, of the port injection valves, scheduled to inject fuel after one or two cycles of the fuel pressure pulsation elapsing from injection of the one port injection valve; and a calculator configured to calculate an energization period of the another port injection valve based on the stored fuel pressure.

Control device of internal combustion engine

A fuel injection control device includes processing circuitry, which executes an estimating process to estimate pressure in first and second fuel storage members connected to first and second fuel injection valves. The estimating process includes: estimating the pressure in the first fuel storage member based on a detection value of a pressure sensor that detects the pressure in the first fuel storage member and a cycle of pulsation in the first fuel storage member, which is determined in accordance with an interval of fuel injections in a first bank; and estimating the pressure in the second fuel storage member by assuming that a phase of a periodic fluctuation of the pressure in the second fuel storage member and a phase of a periodic fluctuation of the pressure in the first fuel storage member are in antiphase.

Fuel injection control device and method for internal combustion engine

The fuel supply apparatus optimizes the timing of performing the fuel pressure change indication and the fuel injection timing to suppress the real fuel injection amount from being differentiated from the target fuel injection amount even at the time of the fuel pressure being changed, thereby improving fuel consumption. The ECU judges that the fuel pressure change request is generated ('YES' in Step S), and calculates the change retarding time t(Step S) when the fuel pressure is at the low pressure side, and the ECU determines that the vehicle is in the warming-up state, or that the fuel is at the high temperature. The ECU sets the change timing to avoid the timing of injecting the fuel from overlapping the changing timing of the fuel pressure with reference to the injection timing of the fuel injection control (Step S).

Fuel supply apparatus

A fuel supply apparatus is designed to secure a high fuel pressure to enhance starting operation efficiency and to respond the requirements of low fuel consumption and power saving at the time of starting operation of a fuel consumption unit such as an internal combustion engine, and comprises a fuel pump for supplying fuel reserved in a fuel tank to an engine, a pressure regulator for introducing therein the fuel to be supplied to the engine from the fuel pump and regulating the fuel at a set pressure, the pressure regulator being operative to change the set pressure of the fuel to a high set pressure and a low set pressure, and a set pressure changing unit for changing the set pressure of the pressure regulator into a desired set pressure selected from among the high set pressure and the low set pressure, the set pressure changing unit being operative to allow the set pressure of the pressure regulator at the time of the fuel pump being stopped to be higher than the set pressure of the pressure regulator at the time of the fuel pump being operated.

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Toyota, Japan

Toru Suda