Fuel storage device

Abstract

To provide a fuel storage device capable of suppressing the leakage of fuel out of an edge of an upper opening part of a sub tank when a liquid surface height of fuel stored in a fuel tank is lower than an upper end of the sub tank, and suppressing the generation of vapor or the like due to the agitation of the fuel when the liquid surface height of the fuel is higher than the upper end of the sub tank.SOLUTION: A fuel storage device 1 includes: a lid body 70 formed to partially cover an outer edge of an upper opening part of a sub tank 66 and mounted turnably and rockably in a vertical direction depending on inertial force; a stopper member 73 abutting on the lid body 70 when the lid body 70 rocks upward; an electromagnet 74 arranged on the stopper member 73 for attracting the outer edge of the lid body 70 when it is turned on; and an ECU 50 for turning on the electromagnet 74 when a liquid surface height of fuel is higher than an upper end of the sub tank 66, and turning off the electromagnet 74 when the liquid surface height of the fuel is lower than the upper end of the sub tank 66.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a fuel storage device that is mounted on a vehicle and stores liquid fuel. [Background technology]

[0002] For example, Patent Document 1 discloses a fuel supply system having a fuel tank for storing fuel, a sub-tank (swirl tank) disposed within the fuel tank, a fuel pump disposed within the sub-tank for pressurizing the fuel and sending it to the engine, a return pipe (return pipe) for returning excess fuel (surplus fuel) from the fuel sent from the fuel pump to the sub-tank, and a jet pump installed in the return pipe for transferring fuel stored in the fuel tank to the sub-tank by utilizing the Venturi effect of the excess fuel returned to the sub-tank. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-53334 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, the subtank has an open top to allow fuel to flow from the fuel tank into the subtank when the liquid level of the fuel stored in the fuel tank is higher than the top of the subtank. Therefore, when the liquid level of the fuel stored in the fuel tank is lower than the top of the subtank, the fuel in the subtank may shift to one side due to influences such as the road gradient or vehicle acceleration, and may overflow from the edge of the top opening of the subtank.

[0005] For example, when a vehicle accelerates forward (during acceleration), the fuel is shifted to the rear of the subtank due to inertial force, so that the fuel level is tilted so that the rear side is higher. Depending on the amount of fuel in the subtank and the magnitude of the inertial force (∝ acceleration), the fuel may overflow from the edge of the upper opening of the subtank. Similarly, when decelerating, the fuel is shifted to the front of the subtank due to inertial force, so that the fuel level is tilted so that the front side is higher. Also, when turning left, the fuel is shifted to the right side of the subtank due to inertial force (centrifugal force), so that the fuel level is tilted so that the right side is higher. Conversely, when turning right, the fuel is shifted to the left side of the subtank due to inertial force (centrifugal force), so that the fuel level is tilted so that the left side is higher. Depending on the amount of fuel in the subtank and the magnitude of the inertial force (∝ acceleration), the fuel may overflow from the edge of the upper opening of the subtank.

[0006] In order to prevent fuel from spilling out of such a sub-tank, for example, it is conceivable to attach a lid to the upper end (upper opening) of the sub-tank, which moves according to inertial force and partially covers the upper opening of the sub-tank. However, when such a lid is attached, if the liquid level of the fuel stored in the fuel tank is higher than the upper end of the sub-tank, it is expected that the lid will move according to inertial force, stirring the fuel and generating vapor, etc.

[0007] The present invention has been made to solve the above-mentioned problems, and has an object to provide a fuel storage device that can prevent fuel from overflowing from the edge of the upper opening of the sub-tank when the liquid level of the fuel stored in the fuel tank is lower than the upper end of the sub-tank, and can prevent the fuel from being stirred up and generating vapor, etc., when the liquid level of the fuel stored in the fuel tank is higher than the upper end of the sub-tank. [Means for solving the problem]

[0008] a stopper member disposed vertically above the lid member and spaced apart from the lid member and coming into contact with the lid member when the lid member swings vertically upward; an electromagnet disposed on the stopper member and configured to attract the outer edge of the lid member when turned on; fuel amount detection means for detecting a level of the fuel stored in the fuel tank; and a control unit for controlling the on / off of the electromagnet in accordance with the level of the fuel stored in the fuel tank detected by the fuel amount detection means, wherein the control unit turns on the electromagnet when the level of the fuel stored in the fuel tank is higher than the upper end of the subtank, and turns off the electromagnet when the level of the fuel stored in the fuel tank is lower than the upper end of the subtank.

[0009] According to a fuel storage device according to one aspect of the present invention, when the level of the fuel stored in the fuel tank is lower than the upper end of the sub-tank, the electromagnet is turned off and the lid closes by its own weight. Therefore, even if the fuel is shifted to one side due to the road gradient, the acceleration / deceleration of the vehicle, turning, etc., the lid rotates according to the inertial force, thereby preventing the fuel from spilling out from the edge of the upper opening of the sub-tank. On the other hand, when the level of the fuel stored in the fuel tank is higher than the upper end of the sub-tank, the electromagnet is turned on and the lid is attracted to the electromagnet, thereby fixing the lid to the stopper member. In other words, the rotation of the lid is prohibited. Therefore, it is possible to prevent the fuel from being stirred by the rotation of the lid. Effect of the Invention

[0010] According to the present invention, when the liquid level of the fuel stored in the fuel tank is lower than the upper end of the sub-tank, it is possible to prevent the fuel from overflowing from the edge of the upper opening of the sub-tank, and when the liquid level of the fuel stored in the fuel tank is higher than the upper end of the sub-tank, it is possible to prevent the fuel from being stirred up and generating vapor, etc. [Brief description of the drawings]

[0011] [Figure 1] 1 is a diagram showing the configuration of a fuel storage device according to an embodiment, and a direct injection engine to which the fuel storage device is applied; [Diagram 2] 1 is a diagram illustrating a schematic configuration of a main part of a fuel storage device according to an embodiment of the present invention; [Diagram 3] 1 is a diagram showing a schematic diagram of a state in which the liquid level of fuel stored in a fuel tank is lower than the upper end of a sub-tank; [Figure 4] 1 is a diagram showing a schematic diagram of a state in which the liquid level of fuel stored in a fuel tank is higher than the upper end of a sub-tank; [Diagram 5] FIG. 11 is a diagram showing the relationship between vehicle acceleration (inertial force) and the amount of fuel in a sub-tank (inclination of the liquid level). [Figure 6] 5 is a flowchart showing a process procedure of an electromagnet driving process performed by the fuel storage device according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same reference numerals will be used for the same or corresponding parts. In each drawing, the same reference numerals will be used for the same elements, and duplicated explanations will be omitted.

[0013] First, the configuration of a fuel storage device 1 according to an embodiment will be described with reference to Figs. 1 to 4. Fig. 1 is a diagram showing the configuration of the fuel storage device 1 and a direct injection engine (hereinafter, also simply referred to as "engine") 10 to which the fuel storage device 1 is applied. Fig. 2 is a diagram showing a schematic configuration of a main part of the fuel storage device 1. Fig. 3 is a diagram showing a schematic state when the liquid level of the fuel stored in the fuel tank 63 is lower than the upper end of the sub-tank 66. Fig. 4 is a diagram showing a schematic state when the liquid level of the fuel stored in the fuel tank 63 is higher than the upper end of the sub-tank 66.

[0014] The engine 10 may be of any type, for example a horizontally opposed four-cylinder gasoline engine. The engine 10 is an in-cylinder injection engine that directly injects fuel into the cylinders. In the engine 10, air taken in through an air cleaner 16 is throttled by an electronically controlled throttle valve (hereinafter also simply referred to as a "throttle valve") 13 provided in an intake pipe 15, passes through an intake manifold 11, and is taken into each cylinder formed in the engine 10.

[0015] An injector 12 that injects fuel into the cylinder is attached to each cylinder of the engine 10. The injector 12 directly injects fuel pressurized by a high-pressure fuel pump 60 into the combustion chamber of each cylinder.

[0016] The injectors 12 are connected to a delivery pipe (common rail) 61. The delivery pipe 61 distributes fuel pumped from a high-pressure fuel pump 60 through a high-pressure fuel pipe 62 to each injector 12. The high-pressure fuel pump 60 pressurizes the fuel, which is pumped up from a fuel tank 63 (described in detail later) by a feed pump (low-pressure fuel pump) 64 (corresponding to a fuel pump in the claims) and supplied through a low-pressure fuel pipe 65, to a high pressure (for example, 8 to 13 MPa) depending on the operating state, and supplies the fuel to the delivery pipe 61. In this embodiment, a type of high-pressure fuel pump 60 driven by the camshaft 28 of the engine 10 is used as the high-pressure fuel pump 60.

[0017] A spark plug 17 for igniting the air-fuel mixture and an igniter-integrated coil 21 for applying high voltage to the spark plug 17 are attached to the cylinder head of each cylinder. In each cylinder of the engine 10, the air-fuel mixture of the intake air and the fuel injected by the injector 12 is ignited by the spark plug 17 and combusted. Exhaust gas after combustion is discharged through an exhaust pipe 18.

[0018] Here, the fuel tank 63 is, for example, a hollow container made of resin, and stores liquid fuel such as gasoline or diesel (hereinafter simply referred to as “fuel”) to be supplied to the engine 10.

[0019] A sub-tank (reservoir) 66 having, for example, a substantially cylindrical shape is disposed inside (at the bottom of) the fuel tank 63 which stores the fuel. The sub-tank 66 is formed, for example, from resin or the like. The upper part of the sub-tank 66 is open so that fuel can flow from the fuel tank 63 into the sub-tank 66 when the liquid level of the fuel stored in the fuel tank 63 is higher than the upper end (height) of the sub-tank 66.

[0020] A feed pump 64 is disposed within the sub-tank 66. The feed pump 64 is driven by an electric motor and pressurizes the fuel and sends (supplies) it to the engine 10 (the injector 12).

[0021] In addition, a return pipe 67 is connected to the low-pressure fuel pipe 65, which returns surplus fuel (excess fuel) from the fuel sent (supplied) from the feed pump 64 to the engine 10 (injector 12) to the sub-tank 66. A jet pump 68 is installed in the return pipe 67, which transfers fuel stored in the fuel tank 63 to the sub-tank 66 by utilizing the Venturi effect of the surplus fuel returned to the sub-tank 66.

[0022] The relationship between the vehicle acceleration (inertial force) and the amount of fuel (inclination of the liquid level) in the sub-tank 66 is shown in Fig. 5. For example, in Fig. 5, when the vehicle accelerates to the left (e.g., forward), the fuel is biased to the right (e.g., rearward) due to the inertial force, and the liquid level of the fuel is biased so that the right side is higher. Similarly, when the vehicle decelerates or turns, the fuel is biased to one side due to the inertial force.

[0023] Therefore, the fuel storage device 1, which is configured with the fuel tank 63 and the sub-tank 66, can prevent the fuel from overflowing from the edge of the upper opening of the sub-tank 66 when the liquid level of the fuel stored in the fuel tank 63 is lower than the upper end (height) of the sub-tank 66, and has the function of preventing the fuel from being stirred and generating vapor, etc., when the liquid level of the fuel stored in the fuel tank 63 is higher than the upper end (height) of the sub-tank 66.

[0024] Therefore, a lid body (lid member) 70 formed to partially cover (at least partially cover) the outer edge of the upper opening of the subtank 66 is attached to the upper opening of the subtank 66. The lid body 70 is, for example, a plate-like member formed in a substantially sector shape. The central angle of the substantially sector-shaped lid body 70 is set to, for example, less than 180°.

[0025] Furthermore, the base 70a of the lid body 70, which is formed in a substantially sector shape, is formed in a ring shape. The ring-shaped base 70a is attached to a shaft (pillar) 69 protruding from the sub-tank 66 so as to be rotatable and swingable. That is, the lid body 70 is attached to the sub-tank 66 so as to be rotatable (in the direction opposite to the vehicle acceleration) in response to the force of inertia, and so as to be swingable in the vertical direction (the vehicle up-down direction). The shape of the lid body 70 may be, for example, a triangle or a trapezoid.

[0026] The lid body 70 is formed from, for example, resin. A weight 71 made of, for example, a magnetizable material such as iron (a material that can be attracted to an electromagnet 74 described later) is attached to the outer edge of the lid body 70, and applies a force to the lid body 70 in a direction to close the lid body 70. The weight 71 has a weight (mass) such that the lid body 70 does not float up even if the fuel level becomes higher than the lid body 70 or even if an inertial force acts on the lid body 70.

[0027] The lid 70 itself may be made of a material that has a large specific gravity and can be magnetized, such as iron, in which case the weight 71 may be omitted.

[0028] A stopper member 73 is disposed vertically above the lid body 70 with a predetermined clearance (separated therefrom) and comes into contact with (locks) the lid body 70 when the lid body 70 is attracted by an electromagnet 74 (described later) and swings vertically upward. The stopper member 73 is a member made of, for example, resin or the like and formed into a circular plate shape. The stopper member 73 is attached to the fuel tank 63, for example, by a connecting shaft or the like. The stopper member 73 may also be attached to the sub-tank 66 by a connecting shaft or the like.

[0029] An electromagnet 74 is disposed on the stopper member 73 and configured to attract the outer edge (weight 71) of the lid body 70 when turned on (energized). The electromagnet 74 is configured to have, for example, a core (e.g., an iron core) made of a magnetic material and a coil wound around the outer periphery of the core.

[0030] The electromagnet 74 is formed in a ring shape at a position facing the outer edge (weight 71) of the lid body 70 (i.e., a position where the weight 71 or the lid body 70 itself can be attracted). Alternatively, a plurality of electromagnets 74 are arranged in a ring shape at a position facing the outer edge (weight 71) of the lid body 70 (i.e., a position where the weight 71 or the lid body 70 itself can be attracted). Note that the number of electromagnets 74 in this case can be set arbitrarily depending on requirements, etc. The driving (on / off) of the electromagnets 74 is controlled by an electronic control unit (hereinafter referred to as "ECU") 50 described later.

[0031] A cam angle sensor 32 for identifying the cylinders of the engine 10 is attached near the camshaft 28 of the engine 10. In addition, a crank angle sensor 33 for detecting the rotational position of the crankshaft 10a is attached near the crankshaft 10a of the engine 10.

[0032] These sensors are connected to the ECU 50. Also connected to the ECU 50 are various sensors, such as an air flow meter 14 that detects the amount of air taken in from the air cleaner 16 (the amount of air taken in by the engine 10), an LAF sensor 19A that outputs a signal corresponding to the oxygen concentration in the exhaust gas, a rear (after CAT) O2 sensor 19B that detects the exhaust air-fuel ratio in an on-off manner, a vacuum sensor 30 that detects the pressure in the intake manifold 11, a throttle opening sensor 31, a water temperature sensor 34 that detects the temperature of the cooling water for the engine 10, an oil temperature sensor 35 that detects the temperature of the lubricating oil, an accelerator operation amount sensor 36 that detects the amount of depression of the accelerator pedal, i.e., the operation amount of the accelerator pedal, and an intake air temperature sensor 37 that detects the intake air temperature.

[0033] Furthermore, a fuel gauge 39 that detects the amount of fuel (height of the liquid level) stored in the fuel tank 63 is connected to the ECU 50. The fuel gauge 39 corresponds to a fuel amount detection means recited in the claims. Note that as the fuel gauge 39, for example, a type in which an arm is attached to a float floating in the fuel tank 63 and the position of the float (i.e., the amount of fuel) is detected as a change in electrical resistance can be used. As the fuel gauge 39, a capacitance type sensor or the like can also be used.

[0034] The ECU 50 is configured to include a microprocessor that performs calculations, an EEPROM that stores programs and the like for causing the microprocessor to execute various processes, a RAM that stores various data such as calculation results, a backup RAM whose stored contents are maintained by a battery, and an input / output I / F, etc. The ECU 50 also includes an injector driver that drives the injector 12, an output circuit that outputs an ignition signal, and a motor driver that drives the electric motor 13a that opens and closes the electronically controlled throttle valve 13, etc. The ECU 50 also includes a driver circuit that drives the electromagnet 74, etc.

[0035] The ECU 50 identifies the cylinder from the output of the cam angle sensor 32, and obtains the engine speed from the output of the crank angle sensor 33. The ECU 50 also obtains various information, such as the intake air amount, the intake pipe negative pressure, the accelerator pedal operation amount, the air-fuel ratio of the mixture, the intake air temperature, and the water temperature and oil temperature of the engine 10, based on the detection signals input from the various sensors described above.

[0036] Then, based on the various types of information acquired, the ECU 50 comprehensively controls the engine 10 by controlling the fuel injection amount, fuel injection timing, ignition timing, and various devices such as the throttle valve 13 (amount of intake air) and the electromagnet 74. In other words, the ECU 50 functions as a control unit as recited in the claims.

[0037] In particular, the ECU 50 has a function of preventing the fuel from spilling out from the edge of the upper opening of the subtank 66 when the liquid level of the fuel stored in the fuel tank 63 is lower than the upper end of the subtank 66, and of turning on and off the electromagnet 74 to prevent the fuel from being stirred and generating vapor, etc., when the liquid level of the fuel stored in the fuel tank 63 is higher than the upper end of the subtank 66. In the ECU 50, the functions are realized by a microprocessor executing a program stored in an EEPROM or the like.

[0038] Therefore, the ECU 50 controls the on / off of the electromagnet 74 depending on the level of the fuel stored in the fuel tank 63. More specifically, the ECU 50 turns on (energizes) the electromagnet 74 when the level of the fuel stored in the fuel tank 63 is higher than the upper end (height) of the sub-tank 66 (see steps S100 and S102 in FIG. 6). Note that FIG. 6 is a flowchart showing the procedure of the electromagnet drive process performed by the ECU 50 constituting the fuel storage device 1. This process is repeatedly executed by the ECU 50 at a predetermined timing.

[0039] When the electromagnet 74 is turned on (energized), the lid body 70 is attracted to the electromagnet 74, swings vertically upward, and comes into contact with the stopper member 73 (electromagnet 74) and is fixed therein. That is, the lid body 70 is prevented from rotating.

[0040] On the other hand, when the liquid level of the fuel stored in the fuel tank 63 is lower than the upper end (height) of the sub-tank 66, the ECU 50 turns off (stops the flow of electricity to) the electromagnet 74 (see steps S100 and S104 in FIG. 6). By turning off (stopping the flow of electricity to) the electromagnet 74, the lid body 70 separates from the electromagnet 74 and swings vertically downward due to the weight of the weight 71 (or its own weight) to close.

[0041] As described above in detail, according to this embodiment, when the level of the fuel stored in the fuel tank 63 is lower than the upper end (height) of the sub-tank 66, the electromagnet 74 is turned off and the lid body 70 is closed by its own weight. Therefore, even if the fuel is shifted to one side due to the road gradient, the acceleration / deceleration of the vehicle, turning, etc., the lid body 70 rotates according to the inertial force, so that the fuel can be prevented from overflowing from the edge of the upper opening of the sub-tank 66. On the other hand, when the level of the fuel stored in the fuel tank 63 is higher than the upper end (height) of the sub-tank 66, the electromagnet 74 is turned on and the lid body 70 (weight 71) is attracted to the electromagnet 74, so that the lid body 70 is fixed to the stopper member 73. That is, the rotation of the lid body 70 is prohibited. Therefore, it is possible to prevent the fuel from being stirred by the rotation of the lid body 70.

[0042] As a result, according to this embodiment, when the liquid level of the fuel stored in the fuel tank 63 is lower than the upper end of the sub-tank 66, it is possible to prevent the fuel from overflowing from the edge of the upper opening of the sub-tank 66, and when the liquid level of the fuel stored in the fuel tank 63 is higher than the upper end of the sub-tank 66, it is possible to prevent the fuel from being stirred up and generating vapor, etc.

[0043] According to this embodiment, weight 71 made of a magnetizable material is attached to the outer edge of lid body 70, and applies a force to lid body 70 in a direction to close lid body 70. Therefore, even if lid body 70 is made of a non-magnetizable material such as resin, it can be attracted to electromagnet 74. Also, even if the fuel level is higher than lid body 70 or if inertial force acts when lid body 70 is closed, lid body 70 can be prevented from floating up.

[0044] According to this embodiment, the electromagnet 74 is formed or arranged in a ring shape at a position where it can face the outer edge portion (weight 71) of the lid body 70. Therefore, when the electromagnet 74 is turned on, it is possible to more reliably attract the lid body 70 (weight 71) and to reliably fix the lid body 70 to the stopper member 73.

[0045] According to this embodiment, the lid 70 is formed in a substantially sector shape, which allows the fuel to flow from the fuel tank 63 into the sub-tank 66 while effectively preventing the fuel from spilling out from the edge of the upper opening of the sub-tank 66. In addition, the area for attraction with the electromagnet 74 can be made large.

[0046] According to this embodiment, the base 70a of the lid body 70, which is formed in a roughly sector shape, is formed in a ring shape, so that the lid body 70 can be attached so as to be rotatable in response to inertial force and swingable in the vertical direction.

[0047] Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and various modifications are possible. For example, in the above embodiment, a direct injection engine has been described as an example of the engine 10, but the engine 10 may be of a port injection type. Furthermore, the engine 10 may be one that uses a combination of an injector for in-cylinder injection and an injector for port injection. Furthermore, in the above embodiment, a NA (naturally aspirated) engine has been described as an example of the engine 10, but the engine 10 may be an engine equipped with a supercharger (such as a turbocharger).

[0048] Furthermore, in the above embodiment, the present invention is applied to a conventional engine vehicle, but the present invention can also be applied to, for example, an engine of a hybrid electric vehicle (HEV).

[0049] In the above embodiment, the lid body 70 is formed in a substantially sector shape, but the shape of the lid body 70 is not limited to a substantially sector shape and may be, for example, a triangle, a trapezoid, or the like.

[0050] Furthermore, in the above embodiment, the stopper member 73 is attached to the fuel tank 63 by a connecting shaft or the like, but the stopper member 73 may be attached to the sub-tank 66 by a connecting shaft or the like.

[0051] In addition, the electromagnet 74 may be configured to be turned on when the liquid level of the fuel stored in the fuel tank is higher than the upper end of the sub-tank 66 and the road surface gradient and the vehicle's longitudinal acceleration and lateral acceleration are equal to or greater than predetermined values.

[0052] Furthermore, the present invention may be applied to, for example, an oil pan (oil tank) that stores oil. [Explanation of symbols]

[0053] 1 Fuel storage device 10 Engine 12 Injector 39 Fuel gauge 50 ECU 60 High pressure fuel pump 61 Delivery Pipe 62 High pressure fuel pipe 63 Fuel Tank 64 Feed pump (low pressure fuel pump) 65 Low pressure fuel pipe 66 Subtank (reservoir) 67 Return pipe 68 Jet Pump 69 Axis 70 Lid (lid member) 70a required 71 Weight 73 Stopper member 74 Electromagnet

Claims

1. A fuel tank for storing fuel; a sub-tank disposed within the fuel tank and housing a fuel pump; a lid body formed so as to cover at least a part of an outer edge of an upper opening of the sub-tank, and attached to the sub-tank so as to be rotatable in response to inertial force and so as to be swingable in a vertical direction; a stopper member disposed vertically above the lid body at a distance therefrom and coming into contact with the lid body when the lid body swings vertically upward; an electromagnet disposed in the stopper member and configured to attract an outer edge portion of the lid when turned on; a fuel amount detection means for detecting a liquid level of the fuel stored in the fuel tank; a control unit that controls on / off of the electromagnet in response to a liquid level of the fuel stored in the fuel tank detected by the fuel amount detection means, The control unit includes: When the liquid level of the fuel stored in the fuel tank is higher than the upper end of the sub-tank, the electromagnet is turned on, When the liquid level of the fuel stored in the fuel tank is lower than the upper end of the sub-tank, the electromagnet is turned off. A fuel storage device comprising:

2. 2. The fuel storage device according to claim 1, further comprising a weight made of a magnetizable material, disposed on an outer edge of the lid, and applying a force to the lid in a direction to close the lid.

3. 3. The fuel storage device according to claim 2, wherein the cover is a plate-like member formed in a substantially sector shape.

4. 4. The fuel storage device according to claim 3, wherein the lid body formed in a substantially sector shape has a ring-like main portion.

5. The fuel storage device according to claim 4, characterized in that the electromagnet is formed in a ring shape or arranged in a ring shape at a position where it can face the outer edge of the lid body when the lid body swings vertically upward.

Images