JP2005048632A - Engine starter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an engine starter of improved safety with a restarting drive source arranged at a position considered to be safe upon collision. <P>SOLUTION: The engine starter comprises a geared starter motor 2 for starting an engine 1 and a starter motor 3 as the restarting drive source different therefrom. The engine stopped in a preset condition after started is restarted using the starter motor 3. The starter motor 3 is arranged under a cylinder block 5 of the engine in the state of being supported by an oil pan 6 of the engine 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an engine starter that stops an engine during idling after the engine is started and restarts the engine using a restart drive source during restart.
[0002]
[Prior art]
A vehicle equipped with a so-called idle stop function that stops the engine once it stops after waiting for a signal after starting the engine and enters the idling state for the purpose of reducing noise, fuel consumption, and exhaust gas when stopping ing. In such a vehicle, in order to restart the engine, a drive source driven by the operation of the ignition switch is often used. However, the starting drive source, that is, the starter motor has a pinion gear that meshes with a ring gear provided on the output shaft of the engine. When starting the engine, the engine starter meshes both gears while rotating the pinion gear to the meshing position with the ring gear using a plunger, etc. Noise issues such as meshing noise become a problem. In view of this, as disclosed in Patent Document 1, there has been proposed one using a starting drive source and a restart driving source provided separately. The drive source for restart is a drive pulley that winds a belt between a pulley provided on the output shaft of the engine, and is mounted on the drive shaft via a clutch. Are configured to rotate together.
[0003]
[Patent Document 1]
JP 2001-159385 A
[0004]
[Problems to be solved by the invention]
The restart drive source described in Patent Document 1 uses a power transmission means including a belt and a pulley to rotate the output shaft of the engine. The location of installation is not specified. That is, regarding the installation location of various members related to the engine including the drive source, it is necessary to consider the safety at the time of collision, and the installation location is being studied.
An object of the present invention is to propose an engine starter that can improve the safety by disposing a drive source at the time of restart at a position that takes into account the safety at the time of a collision.
[0005]
[Means for Solving the Problems]
To achieve the above object, according to the present invention, in an engine starter that restarts an engine that is stopped in a predetermined state after the engine is started using a restart drive source, the restart drive source is the engine It is characterized by being arranged below the cylinder block of the engine in support of the oil pan. Since the oil pan is disposed below the cylinder block, the restart drive source is supported by the oil pan so that the restart drive source is disposed between the engine and the passenger compartment. In comparison, the restart drive source is not pushed to the passenger compartment side by the engine in the event of a collision.
When the restart drive source is attached to the recess for accommodating the restart drive source formed on the lower surface of the oil pan, the installation space is reduced because it is superposed with the oil pan.
When a cover covering at least a part of the drive pulley is provided in the vicinity of the drive pulley that is provided on the drive shaft of the drive source for restarting and that wraps the belt between the pulley provided on the output shaft of the engine. The collision and biting of foreign matter from the outside with respect to the pulley are reduced. Forming the cover integrally with the oil pan is preferable because it can function as a reinforcing member for the oil pan.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, the code | symbol 1 shows the engine 1 which has an engine starting apparatus. The engine starter includes a starter motor with gear 2 as a drive source driven by an ignition switch device (not shown), and a starter motor 3 as a drive source for restart provided separately from the starter motor with gear 2. .
[0007]
The engine 1 has a cylinder head 4 as a center, a cylinder head 4 attached to the upper part thereof, and a oil pan 6 attached detachably to the lower part thereof. In this embodiment, the engine 1 is an in-line multiple cylinder, and is mounted horizontally in front of the vehicle. The engine 1 is started by operating an ignition switch. When an idle stop mode (not shown) is selected, the engine 1 is stopped in a predetermined state after the engine is started. When this idle stop mode is selected, the starter motor 3 is driven for restart after engine start, and the control means 30 (to be described later) Start is controlled.
[0008]
The geared starter motor 2 has a pinion gear 2 </ b> A that meshes with a ring gear 9 </ b> A provided on a crankshaft 9 that serves as an output shaft of the engine 1. This starter motor with gear 2 is of a type in which both gears are engaged while rotating the pinion gear 2A to a meshing position with the ring gear 9A using a plunger (not shown) or the like when starting the engine.
[0009]
The starter motor 3 has a drive pulley 11 mounted on its drive shaft 8 via an electromagnetic clutch 26. A double pulley 10 having two grooves is mounted on the crankshaft 9 so as to be rotatable integrally with the crankshaft 9. The electromagnetic clutch 26 is turned off when the starter motor is started or the engine is running, so that the drive pulley 11 is rotatable with respect to the drive shaft 8 and an idle stop motor is selected to restart the electromagnetic clutch 26. It operates so as to rotate the drive shaft 8 and the drive pulley 11 integrally. A driving belt 12 is wound around a groove on one side of the hour driving pulley 11 and the double pulley 10. A tension pulley 21 is disposed between the double pulley 10 and the drive pulley 11. The tension pulley 21 is rotatably supported by the oil pan 6 and applies tension to the drive belt 12.
[0010]
An alternator 14, a water pump 16, and an air conditioner compressor 18, which are auxiliary machines, are attached to a portion of the cylinder block 5 located on the vehicle front side by fastening members such as bolts. Pulleys 15, 17, and 19 are respectively attached to the rotation shafts of the alternator 14, the water pump 16, and the compressor 18 so as to rotate integrally with the rotation shafts. An auxiliary machine driving belt 20 is wound around these pulleys 15, 17, 19 and the other groove of the double pulley 10.
[0011]
A cooling path (not shown) that communicates with each other is formed in the cylinder head 4 and the cylinder block 5. The water pump 16 is connected to a cooling path between the discharge port 13 a of the radiator 13 and the cylinder block 5. The introduction port 13 b of the radiator 13 is connected to the cooling path of the cylinder head 4.
[0012]
As shown in FIG. 2, on the side of the passenger compartment facing the radiator 13 with the engine 1 in between, an axle 24 on which an unillustrated tire is mounted is disposed in the vehicle width direction indicated by an arrow W. Yes. Reference numeral 23 denotes a side frame, and reference numeral 25 denotes an oil filter.
[0013]
As shown in FIG. 1, the starter motor 3 is supported by an oil pan 6 and disposed below the cylinder block 5. That is, the oil pan 6 is formed with a recess 7 for substantially accommodating the starter motor 3 as shown in FIGS. The recess 7 is formed by recessing the bottom surface 6c of the oil pan 6 in the vertical direction indicated by the width direction W and the arrow Y, and is formed so as to attach the starter motor 3 so as to overlap with the oil pan 6. . As shown in FIG. 4, threaded portions 60 that are screwed with the mounting bolts 62 are formed on the mounting surfaces 7 a and 7 b, respectively. In this embodiment, the oil pan 6 is made of aluminum die cast. As shown in FIG. 3, a baffle plate 27 and an oil strainer 28 are disposed inside the oil pan.
[0014]
In FIG. 1, the geared starter motor 2, starter motor 3, and electromagnetic clutch 26 are electrically connected to the control means 30. The control means 30 is composed of a known computer provided with an arithmetic circuit, a memory and the like. A shift position detection switch 31 that detects a shift position, an ignition switch 32, and a brake switch 36 that determines whether or not the brake is operated are electrically connected to the control means 30. The control means 30 controls the starter motor 3 and the electromagnetic clutch 26 according to information obtained from these devices.
[0015]
Idle stop For example, when the idle stop switch 33 is not operated and the idle stop mode is not selected and set, the starter motor 3 is stopped and the electromagnetic clutch 26 is turned off so that the drive pulley 11 rotates the crankshaft 9. To follow and rotate.
[0016]
When the idle stop switch 33 is operated and the idle stop mode is selected and set, the idle stop mode is executed. In this mode, when the ignition switch 33 is turned on, the vehicle speed reaches a predetermined speed or higher, and then the vehicle speed becomes 0 km / h, and the vehicle is stopped. The brake is operated when the shift position is in the drive range and the brake is operated. When the switch 36 is on, the idle operation is automatically stopped.
[0017]
When the restart brake operation is released and the brake switch 36 is turned off, the starter motor 3 and the electromagnetic clutch 26 are driven, and the drive shaft 8 and the drive pulley 11 are integrated. For this reason, the rotation of the starter motor 3 is transmitted to the crankshaft 9 via the drive belt 12 and the double pulley 10, and cranking is performed. Further, the rotation of the double pulley 10 rotates the pulleys of the auxiliary machines via the belt 20, and each auxiliary machine is driven to restart. When the engine speed is increased to a predetermined value or more after restarting, the drive of the starter motor 3 and the electromagnetic clutch 26 is stopped and turned off.
[0018]
In this way, by directly supporting the starter motor 3 with the oil pan 6 disposed below the cylinder block, compared to the case where the starter motor 3 is disposed between the engine 1 and the vehicle interior, the vehicle can be operated in a collision. Since the starter motor 3 is not pushed toward the passenger compartment by the engine 1, it can be disposed at a position in consideration of safety at the time of collision, and a layout can be taken if safety can be improved. Further, since the starter motor 3 is disposed at the lowermost part of the engine 1, the center of gravity of the engine 1 can be kept low. Furthermore, since the mounting portion 60 is integrally formed with the oil pan 6, no brackets or the like are required when mounting the starter motor 3, and the number of components can be reduced. Since the starter motor 3 is mounted in the recess 7 formed on the lower surface 6a of the oil pan 6, the starter motor 3 is superposed on the oil pan 6 and the installation space is reduced.
[0019]
In FIG. 5, a cover 51 is provided in the vicinity of the drive pulley 11. As shown in FIG. 6, the cover 51 is provided on the oil pan 6 located in the vicinity of the upper side of the drive pulley 11, and is formed so as to cover the upper portion of the drive pulley 11.
Thus, by arranging the cover 51 above the drive pulley 11, it is possible to prevent biting of foreign matters such as stones. On the upper surface of the cover 51, an inclined surface 51a that descends from the oil pan 6 toward the outside (left side in FIG. 6) may be formed. When such an inclined surface 50a is formed, the foreign matter flying to the cover 51 can be guided to the outside of the drive pulley 11, and the biting can be further prevented.
[0020]
In this embodiment, since the oil pan 6 is made of aluminum die cast, the cover 51 may be integrally formed. In this case, since the cover 51 also functions as a reinforcing member in the vicinity of the attachment portion 6b, the rigidity of the attachment portion 6b can be improved.
[0021]
In FIG. 5, the code | symbol 52 shows the cover arrange | positioned at the compartment side. The cover 52 is attached to the cylinder block 5 so as to protrude from the block in the direction perpendicular to the paper surface. The cover 52 has a size (length) that covers from the diagonally lower side of the double pulley 10 located on the vehicle compartment side to the lower side of the tension pulley 21.
Thus, by providing the cover 52 separately from the cover 51, the double pulley 10, the tension pulley 21, and the drive pulley 11 can be protected from foreign matters flying from the passenger compartment side.
[0022]
【The invention's effect】
According to the present invention, the restart drive source is supported between the engine and the vehicle interior by supporting the restart drive source with the oil pan 6 disposed below the cylinder block. Compared to, the restart drive source will not be pushed to the passenger compartment side by the engine in the event of a collision, so it can be placed at a position that takes safety into consideration at the time of the collision, and a layout that can improve safety is taken Can do.
According to the present invention, since the driving source for restart is mounted in the recess formed on the lower surface of the oil pan, it is superposed with the oil pan, and the installation space can be reduced.
According to the present invention, at least a part of the drive pulley is provided in the vicinity of the drive pulley that is provided on the drive shaft of the drive source for restarting and that winds the belt between the pulley provided on the output shaft of the engine. By providing a cover that covers the outer surface of the drive pulley, it is possible to reduce collision and biting of foreign matter from the outside with respect to the drive pulley.
[Brief description of the drawings]
FIG. 1 is a diagram showing a general configuration of an engine equipped with an engine starter according to an embodiment of the present invention.
FIG. 2 is a view of the vicinity of an engine provided with an oil pan to which a restart drive source is mounted as viewed from the lower surface side.
FIG. 3 is a perspective view showing an overview of an oil pan to which a restart drive source is attached.
FIG. 4 is a partially enlarged view of an oil pan equipped with a restart drive source.
FIG. 5 is a diagram showing a general configuration of an engine equipped with an engine starter provided with a cover.
FIG. 6 is a partially enlarged cross-sectional view showing a configuration of an oil pan peripheral portion near the cover.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Engine 2 Drive source 3 Restart drive source 5 Cylinder block 6 Oil pan 6a Lower surface 7 Recess 8 Drive shaft 9 Engine output shaft 10 Pulley 11 Drive pulley 12 Belt 50 Cover

Claims (3)

Engine start having a drive source for starting the engine and a drive source for restart different from this, and restarting the engine that is stopped in a predetermined state after the engine is started using the drive source for restart In the device
An engine starter characterized in that the restart drive source is supported by an oil pan of the engine and is disposed below a cylinder block of the engine. The engine starter according to claim 1, wherein
The engine starter characterized in that the restart drive source is formed on a lower surface of the oil pan and is mounted in a recess for accommodating the restart drive source. The engine starter according to claim 1 or 2,
The restart drive source has a drive pulley for winding a belt between the drive shaft and a pulley provided on the output shaft of the engine.
An engine starter characterized in that an oil pan located in the vicinity of the drive pulley is provided with a cover that covers at least a part of the drive pulley.

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