Unlock instant, AI-driven research and patent intelligence for your innovation.

Evaporative Fuel Treatment Unit

A technology of evaporative fuel and processing device, which is applied in the field of evaporative fuel processing device, which can solve the problems of disturbing the air-fuel ratio of the engine, the deformation of the fuel tank, and the increase of the negative pressure of the fuel tank, so as to achieve the effect of simplifying the structure and suppressing adverse conditions

Inactive Publication Date: 2018-10-19
AISAN IND CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the negative pressure transmitted to the fuel tank through the vapor passage increases during purging, and the fuel tank is deformed.
In addition, sometimes evaporated fuel in the fuel tank is sucked directly into the engine, disturbing the air-fuel ratio of the engine

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Evaporative Fuel Treatment Unit
  • Evaporative Fuel Treatment Unit
  • Evaporative Fuel Treatment Unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] Figure 1 to Figure 8 An embodiment of the present invention is shown. In this embodiment, the diaphragm valve 40 is provided in the vapor passage 34 of the evaporated fuel processing apparatus. However, as the evaporated fuel processing apparatus, the adsorption capacity of the adsorption tank 31 has been increased compared with conventional ones in order to meet the demand for improvement of the processing capacity. and an increase in purge flow. Figure 8 Showing its appearance, the purge flow rate is higher than the conventional maximum flow rate "A". In addition, as the adsorption capacity of the canister 31 increases, the pressure loss of the canister 31 greatly exceeds the allowable value (permissible value for resin tanks and iron tanks) for deformation of the fuel tank. Therefore, in the present invention, the vapor passage 34 can be blocked by the diaphragm valve 40 , and the negative pressure during purge is not transmitted to the fuel tank 21 through the v...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A fuel vapor processing apparatus may include a diaphragm valve disposed in a vapor path communicating between a fuel tank and a canister. The diaphragm valve may include a valve chamber, a backpressure chamber, a diaphragm partitioning the valve chamber and the backpressure chamber from each other; and a valve member attached to the diaphragm. The backpressure chamber is not directly opened to an outside of the diaphragm valve. A control valve device may control a pressure within the backpressure chamber of the diaphragm valve.

Description

technical field [0001] The present invention relates to an evaporated fuel treatment device for treating evaporated fuel generated in a fuel tank. Background technique [0002] The following evaporated fuel treatment device is being put into practical use: the evaporated fuel generated in the fuel tank is adsorbed to the adsorption canister through the vapor passage, and when the engine is running, the intake negative pressure of the engine is used to remove the evaporated fuel adsorbed on the adsorption canister through the purge passage. Fuel is pumped and treated. Based on the demand for improvement in processing capacity in this evaporated fuel processing apparatus, an increase in the adsorption capacity of the adsorption tank and an increase in the purge flow rate are being studied. When the adsorption capacity of the adsorption canister is increased and the purge flow rate is increased, the pressure loss in the adsorption canister during purge increases. Therefore, t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F02M25/08
CPCF02M25/0854F02M25/0836F02M25/0872
Inventor 石川哲也山本典永
Owner AISAN IND CO LTD