Nissan Motor Company Limited

Manabu Okamura

Takashi Nakazawa

Satoshi Nishii

Kenichi Tsubaki

Ryuji Watanabe

Masafumi Okishima

Shingo Yamanaka

Hiroyuki Nose

A control method for an engine includes determining whether a predetermined fuel supply stop condition has been fulfilled, executing stop time vibration suppression control of, after stop of fuel supply in response to fulfillment of the predetermined fuel supply stop condition, temporarily performing fuel supply to the engine to suppress vehicle vibration, and stopping fuel supply to all cylinders after the execution of the stop time vibration suppression control. The stop time vibration suppression control includes determining whether a first predetermined number of cylinders have undergone a combustion stroke after the stop of the fuel supply, the first predetermined number being according to a engine revolution speed or a reduction ratio from the engine to drive wheels, and in a case where the first predetermined number of cylinders have undergone the combustion stroke, performing fuel supply to a second predetermined number of cylinders.

Control method and control device for engine

A fuel injection control apparatus for controlling an amount of fuel injection into a fuel injection port of an intake passage in an internal combustion engine, the fuel injection control apparatus including an exhaust air-fuel ratio sensor configured to detect an exhaust air-fuel ratio, an exhaust temperature sensor configured to detect an exhaust temperature, an intake air flow meter configured to detect an intake air amount in the intake passage, and a controller configured to estimate a wall flow amount of the fuel injection port based on the fuel injection amount, the exhaust air-fuel ratio, and the intake air amount, estimate a catalyst bed temperature of a catalyst provided in an exhaust passage based on the exhaust air-fuel ratio and the exhaust temperature and to correct the estimated catalyst bed temperature in accordance with the wall flow amount, and control the fuel injection amount based on the catalyst bed temperature.

Fuel injection control apparatus for an internal combustion engine

An intake air flow rate detection device for an internal combustion engine (), including a sensor () that detects an operating condition of the internal combustion engine (), an air flow meter () that disposed in the intake passage () upstream of the supercharging device (), and a programmable controller () programmed to calculate a measured intake air flow rate from a detection value of the air flow meter (), calculate a calculated intake air flow rate from the operating condition of the internal combustion engine (), and employ either the measured intake air flow rate or the calculated intake air flow rate as an intake air flow rate of the intake passage () on the basis of an air flow rate of air that is circulated to the intake passage () between the air flow meter () and the supercharging device () through the bypass passage ().

Intake air flow rate detection for internal combustion engine

In an engine fuel supply method, a first fuel pressure difference between a fuel injection amount computation timing and a first fuel injection timing and a second fuel pressure difference between the fuel injection amount computation timing and a second fuel injection timing are estimated at the fuel injection amount computation timing based on a control state of a fuel pneumatic transportation amount of a high-pressure fuel pump. The first fuel injection amount is corrected based on the first fuel pressure difference and the second fuel injection amount is corrected based on the second fuel pressure difference. A fuel injection valve is selectively controlled to supply the high-pressure fuel directly into a cylinder of the engine at the first fuel injection timing with the corrected first fuel injection amount and at the second fuel injection timing with the corrected second fuel injection amount.

Engine fuel supply apparatus and engine fuel supply method

A fuel control method and system is provided for delivering fuel to an engine that employs an engine controller that is configured to the fuel injection quantity delivered to the engine. The engine controller is configured to: calculate a fuel injection quantity based on at least one operating condition of an engine; calculate an estimated fuel pressure value of the high pressure fuel that will be acting on a fuel injection valve when the prescribed fuel injection timing is reached at a prescribed calculation time occurring before the prescribed fuel injection timing; correct the fuel injection quantity that was previously calculated to a corrected fuel injection quantity based on the estimated fuel pressure value that will exist at the prescribed fuel injection timing; and open the fuel injection valve at the prescribed fuel injection timing to discharge a quantity of fuel equal to the corrected fuel injection quantity.

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Yokohama, Japan

Manabu Okamura