Denso Corporation

Kyosan Denki Co., Ltd.

Toshiyuki Yonemoto

Yoshihiko Ooya

Takafumi Kato

Katsumi Mori

Yukihiro Shinohara

Takashi Kikutani

Shigeru Nonoyama

Hideki Narisako

Toshiaki Agui

Osamu Takamisawa

The filter device includes a case, an element, and a water separator. The case accommodates the element and the water separator. The element removes solid particulates from the fuel. The element can be replaced by opening the case. The water separator removes water content from the fuel. The water separator is held in the case. The water separator is movable relative to the case. The water separator is movable within a movable range. The element and the water separator are provided with a passage connecting member for connecting a fuel passages.

Filter device and method of manufacturing the filter device

A fuel-filter abnormality detection device is used for a subject filter provided in a fuel supply device of an engine to filtrate a fuel. The fuel-filter abnormality detection device includes a first filter attachable downstream of the subject filter in fuel flow. A filtration capacity of the first filter is smaller than a filtration capacity of the subject filter, and the first filter traps a foreign matter on a downstream side of the subject filter to cause a change in fuel pressure indicating an abnormality of the subject filter. The fuel-filter abnormality detection device may include a bypass passage through which the fuel bypasses the first filter, a bypass control valve configured to allow the fuel to flow through the bypass passage when the abnormality of the subject filter is detected, and a second filter filtrating the fuel flowing through the bypass passage.

Fuel-filter abnormality detection device

A filter element is formed from a filter material configured to capture a foreign substance in fuel. A lower case is attachable to and detachable from a bottom portion of a housing in a movable direction. The housing and the lower case are configured to accommodate the filter element. The filter element defines a passage extending through the filter element in the movable direction. The passage is configured to accommodate the component. The component is configured to be attached to and detached from the housing together with the lower case when the lower case is attached to and detached from the housing.

Fuel filter device

An ECU reduces a fuel flow rate discharged from an electric pump to the filter when a fuel temperature and a fuel pressure in the filter detected by a sensor portion drop. Since a mechanical pump continues to be driven without respect to the fuel quantity discharged from the electric pumps when the fuel flow rate discharged from the electric pump is decreased, a suction pressure is generated at an inlet of the filter. The fuel in a recirculation passage is introduced into the filter through a branch passage. As the result, relatively high temperature fuel is introduced into the filter to melt a solidified fuel causing a clogging of the filter.

Fuel supply apparatus

In a fuel supply apparatus, a fuel pump draws fuel from a fuel tank, and discharges the fuel to a high-pressure fuel system. A filter unit has a filter element located on a downstream side of the fuel pump to remove foreign matters contained in the fuel discharged from the fuel pump. A jet pump has a nozzle that is installed in a fuel supply passage between the fuel pump and the filter element. The nozzle injects the fuel to a downstream side of the nozzle in the fuel supply passage. The introducing passage introduces excessive fuel from the high-pressure fuel system to the downstream side of the nozzle.

A feed pump pumps fuel from a fuel tank. A filter portion includes a filter element for removing foreign matter contained in the fuel discharged from the feed pump. A high-pressure pump pumps the filtered fuel to the internal combustion engine. A return passage is connected with a passage between the filter element and the high-pressure pump for partially returning the filtered fuel to the fuel tank. A priming pump portion has an inlet port, which is connected with the return passage, and an outlet port, which is connected with the filter element. The priming pump portion draws fuel from the fuel tank to supply the fuel to the filter element when being operated.

Growing community of inventors

Nagoya, Japan

Toshiyuki Yonemoto