A carbon canister for an ultra-low desorption volume engine

Abstract

The present invention discloses a carbon canister for an ultra-low desorption volume engine, comprising a canister body; a bottom cover is installed on the opening of the canister body, and the canister body comprises a cavity I, a cavity II and a cavity III; cavities I, II and III are connected to each other, a partition cavity is provided between cavities II and III, and a heating module is provided in the partition cavity; the adsorption port of cavity I is provided with an oil and gas inlet pipe connected to the oil tank, the desorption port of cavity I is provided with an oil and gas desorption pipe connected to the engine, and one end of cavity III is provided with an atmospheric port connected to the atmosphere. The present invention provides a heating module composed of a resistance wire in the partition cavity between cavities II and III, and during the operation of the engine, the heating module heats the carbon powder, and the desorption efficiency of the carbon canister is improved by accelerating the movement of gasoline molecules, thereby realizing the desorption of the carbon canister of the engine with ultra-low desorption volume.

Description

Technical Field

[0001] The invention relates to the technical field of carbon canisters, and in particular to a carbon canister for an ultra-low desorption volume engine. Background Art

[0002] In order to reduce the pollution of motor vehicle oil and gas emissions to the environment, all fuel-burning vehicles use the ORVR system, which has higher requirements on the carbon canister's ability to absorb oil vapor. The larger carbon canister volume can effectively control the evaporative emissions during the refueling process of motor vehicles. If the carbon canister cannot be cleaned and desorbed in a timely and effective manner, the carbon canister's day and night evaporative emissions will increase. my country's environmental protection regulations have increasingly stringent requirements on this limit. The amount of engine desorption is a very important factor in determining whether the carbon canister can be cleaned and desorbed.

[0003] At the same time, with the widespread use of low-desorption engines such as low-displacement and turbocharged engines, it has become very difficult to reduce the evaporative emissions of carbon canisters of low-desorption models. Today's carbon canister manufacturers often use expensive carbon powder or honeycomb rods that meet low emission requirements to solve this problem. However, if such a design relies solely on the adsorption capacity of carbon powder or honeycomb rods without adding any structure to increase the desorption rate of the carbon canister, the desorption efficiency of the carbon canister will be low.

[0004] Therefore, in order to overcome the shortcomings and defects in the background technology, the present invention provides a carbon canister for an ultra-low desorption volume engine. During the operation of the engine, the carbon powder is heated by a heating module composed of a resistance wire to improve the desorption efficiency and realize the desorption of the carbon canister of the engine with ultra-low desorption volume. Summary of the invention

[0005] The object of the present invention is to provide a carbon canister for an ultra-low desorption volume engine.

[0006] The present invention is achieved through the following technical solutions:

[0007] A carbon canister for an ultra-low desorption volume engine, comprising a canister body;

[0008] A bottom cover is installed on the opening of the tank body, and the tank body has a plurality of cavities, including cavity I, cavity II and cavity III;

[0009] The cavity I, cavity II and cavity III are connected to each other, a partition cavity is provided between the cavity II and cavity III, and a heating module is provided in the partition cavity;

[0010] The cavity I, cavity II and cavity III are filled with adsorption material, and the adsorption material is carbon powder;

[0011] The adsorption port of the cavity I is provided with an oil and gas inlet pipe connected to the oil tank, the desorption port of the cavity I is provided with an oil and gas desorption pipe connected to the engine, and one end of the cavity III is provided with an atmospheric port connected to the atmosphere.

[0012] By adopting the above technical solution, the heating module is connected to the vehicle ECU unit, and when the engine is running, the heating temperature of the heating module is controlled by the vehicle ECU unit.

[0013] With the above technical solution, the heating module is composed of resistance wires, a heating plate is arranged in the compartment cavity, and the resistance wires are arranged in the heating plate for heating.

[0014] Using the above technical solution, the heating temperature of the heating plate is 38-42°C.

[0015] With the above technical solution, a plurality of reinforcing ribs are arranged on the bottom cover, including transverse reinforcing ribs and longitudinal reinforcing ribs, and a single transverse reinforcing rib and a single longitudinal reinforcing rib form a cross structure.

[0016] By adopting the above technical solution, the bottom cover and the opening of the tank body are fixed by welding and sealing.

[0017] The beneficial effects of the present invention are as follows: the present invention provides a carbon canister for an ultra-low desorption volume engine, wherein a heating module composed of a resistance wire is arranged in the interval cavity between cavity II and cavity III, and during the operation of the engine, the heating module heats the carbon powder, thereby improving the desorption efficiency of the carbon canister by accelerating the movement of gasoline molecules, thereby realizing the desorption of the carbon canister of the engine with an ultra-low desorption volume, and the temperature of the heating module is controlled at 38-42°C, which will not cause damage such as thermal deformation to the tank body of the carbon canister, and is convenient and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 for Figure 1 main view.

[0020] Figure 3 for Figure 1 Top view of the .

[0021] Figure 4 for Figure 3 Schematic diagram of the cross section of upper AA.

[0022] Figure 5 for Figure 4 A partial enlarged schematic diagram of part A above.

[0023] Figure 6 This is a circuit schematic diagram of the heating module of the present invention.

[0024] in:

[0025] 1. Tank body;

[0026] 11. Cavity I;

[0027] 111. Oil and gas inlet pipe;

[0028] 112. Oil and gas desorption tube;

[0029] 12. Cavity II;

[0030] 13. Cavity III;

[0031] 131, atmospheric port;

[0032] 2. Bottom cover;

[0033] 3. Interval cavity;

[0034] 4. Heating module;

[0035] 5. Vehicle ECU unit;

[0036] 6. Transverse reinforcement ribs;

[0037] 7. Longitudinal reinforcement ribs. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0039] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0040] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] like Figures 1 to 6 A carbon canister for an ultra-low desorption volume engine is shown, comprising a canister body 1;

[0043] A bottom cover 2 is installed on the opening of the tank body 1, and the tank body has a plurality of cavities, including cavity I 11, cavity II 12 and cavity III 13;

[0044] The cavity Ⅰ11, the cavity Ⅱ12 and the cavity Ⅲ13 are connected to each other, a partition cavity 3 is provided between the cavity Ⅱ12 and the cavity Ⅲ13, and a heating module 4 is provided in the partition cavity 3;

[0045] The cavity Ⅰ11, the cavity Ⅱ12 and the cavity Ⅲ13 are filled with adsorption material, and the adsorption material is carbon powder;

[0046] The adsorption port of cavity I11 is provided with an oil and gas inlet pipe 111 connected to the oil tank, the desorption port of cavity I11 is provided with an oil and gas desorption pipe 112 connected to the engine, and one end of cavity III13 is provided with an atmosphere port 131 connected to the atmosphere.

[0047] In this embodiment, the heating module 4 is connected to the vehicle ECU unit 5, and when the engine is running, the heating temperature of the heating module 4 is controlled by the vehicle ECU unit 5;

[0048] More specifically, the heating module 4 is composed of a resistance wire, a heating plate is arranged in the compartment cavity 3, the resistance wire is arranged in the heating plate for heating, and the heating temperature of the heating plate is 38-42°C. By controlling the heating temperature of the heating plate, the temperature of the heating plate is controlled between 38-42°C. On the one hand, by heating the carbon powder, the movement of gasoline molecules can be accelerated to improve the desorption efficiency of the carbon canister, and on the other hand, the carbon canister body will not be damaged by thermal deformation or the like;

[0049] like Figure 6The circuit schematic diagram of the heating module shown in the figure, the temperature circuit uses a temperature sensor. After the engine is started, the vehicle ECU unit 5 controls the circuit to start working. When the temperature sensor detects that the temperature of the heating module 4 is less than 38°C, a temperature overcooling signal is given to the control circuit, and the heating system is started through the relay for heating; when the temperature sensor detects that the temperature of the heating module 4 is greater than 42°C, a temperature overheating signal is given to the control circuit, and the refrigeration system is started through the relay for refrigeration, so that the temperature of the heating module 4 is controlled between 38-42°C.

[0050] In this embodiment, a plurality of reinforcing ribs are provided on the bottom cover 2, including transverse reinforcing ribs 6 and longitudinal reinforcing ribs 7, and a single transverse reinforcing rib 6 and a single longitudinal reinforcing rib 7 form a cross structure;

[0051] More specifically, the cross arrangement of the transverse reinforcing ribs 6 and the longitudinal reinforcing ribs 7 can significantly improve the strength of the bottom cover 2 and greatly increase the service life of the bottom cover 2; and the bottom cover 2 and the opening of the tank body 1 are welded and sealed, which has high strength.

[0052] The beneficial effects of the present invention are as follows: the present invention provides a carbon canister for an ultra-low desorption volume engine, wherein a heating module composed of a resistance wire is arranged in the interval cavity between cavity II and cavity III, and during the operation of the engine, the heating module heats the carbon powder, thereby improving the desorption efficiency of the carbon canister by accelerating the movement of gasoline molecules, thereby realizing the desorption of the carbon canister of the engine with an ultra-low desorption volume, and the temperature of the heating module is controlled at 38-42°C, which will not cause damage such as thermal deformation to the tank body of the carbon canister, and is convenient and practical.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A carbon canister for an ultra-low desorption volume engine, characterized in that: Including tank; A bottom cover is installed on the opening of the tank body, and the tank body has a plurality of cavities, including cavity I, cavity II and cavity III; The cavity I, cavity II and cavity III are connected to each other, a partition cavity is provided between the cavity II and cavity III, and a heating module is provided in the partition cavity; The cavity I, cavity II and cavity III are filled with adsorption material, and the adsorption material is carbon powder; The adsorption port of the cavity I is provided with an oil and gas inlet pipe connected to the oil tank, the desorption port of the cavity I is provided with an oil and gas desorption pipe connected to the engine, and one end of the cavity III is provided with an atmospheric port connected to the atmosphere; The heating module is connected to the vehicle ECU unit, and when the engine is running, the heating temperature of the heating module is controlled by the vehicle ECU unit; The heating module is composed of resistance wires, a heating plate is arranged in the compartment cavity, and the resistance wires are arranged in the heating plate for heating; The heating temperature of the heating plate is 38-42°C; The bottom cover is provided with a plurality of reinforcing ribs, including transverse reinforcing ribs and longitudinal reinforcing ribs, and a single transverse reinforcing rib and a single longitudinal reinforcing rib form a cross structure.

2. A carbon canister for an ultra-low desorption volume engine according to claim 1, characterized in that: The bottom cover and the opening of the tank body are sealed and fixed by welding.

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