Nissan Motor Company Limited

Hideharu Kadooka

Katsuhiko Kawamura

Motoyuki Hattori

Susumu Kubo

Naoki Mishima

Kenichi Fujimura

Kenichi Goto

Yasuo Kouda

Satoshi Shimada

Ryou Ikegami

A first compressor () which supercharges intake air is provided in the intake passage () of an internal combustion engine (). The first compressor () is driven by the exhaust gas energy of the engine (). A second compressor () driven by an electric motor (), and a bypass valve () which bypasses the second compressor (), are provided in the intake passage () between the first compressor () and the engine (). The bypass valve () shifts from the open state to the closed state according to the operation of the second compressor (). At this time, the bypass valve () starts closing at some time after startup of the second compressor () so that the intake air amount of the engine () is not deficient.

Supercharger for internal combustion engine

In an intake passage () of an internal combustion engine (), a compressor () combined with an electric motor/generator () is provided. A bypass valve () connecting upstream and downstream portions of the intake passage () to bypass the compressor () is further provided. When a required intake air flow rate of the engine () is smaller than a threshold value, the engine () operates by natural aspiration of intake air and the electric motor/generator () generate electric power by using rotational energy of the compressor () which rotates due to the flow of intake air. By increasing the opening of the bypass valve () as the required intake air flow rate diverges from the discharge flow rate of the compressor () the intake air flow rate is accurately controlled while satisfying the power generation requirement.

Supercharging device for internal combustion engine

In a fuel vapor processor for use with an engine provided with a fuel tank comprising a filler tube which fits on a fuel nozzle for refueling, the presence of leaks of fuel vapor is diagnosed according to a variation of a test pressure has been introduced into a purge passage. If refueling of the fuel tank is being performed during the leak diagnosis, an escape vent for air in the fuel tank is provided by connecting the canister to the atmosphere so that smooth refueling is performed.

Fuel vapor processor diagnostic device

The ON/OFF frequency of a purge control valve is defined by a product of an integer and a frequency of REF signal, where the integer does not have a divisor equal to any of the divisors of the number of the cylinders of the engine, other than one. The engine is prevented from being supplied a purge gas concentratedly to a specific cylinder by opening the purge control valve for every five cylinders, for example.

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Yokohama, Japan

Hideharu Kadooka