JPH0542832A - Driving gear of retarder-equipped vehicle - Google Patents

Abstract

PURPOSE:To constantly secure good electrical and magnetic characteristics of an eletrically-operated inductor disposed in proximity to the wet clutch of a vehicle driving system by shielding the inductor with presicion from oil coming from the clutch. CONSTITUTION:An inductor 21 is installed between a flywheel 11 connected to the crankshaft 5 of an engine 1 within hermetically sealed flywheel housing 2,3 and the flywheel housing 2, 3 and the flywheel 11 is connected to a transmission input shaft 12 via a wet clutch 40 of hermetically sealed structure. Oil is blocked by the wet clutch 40 to constantly hold the inside of the flywheel housing 2, 3 in the dry state and thus the inductor 21 is constantly held in its electrically and magnetically normal operation state without being affected by the oil or the like at all.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle, such as an automobile, having a retarder for converting mechanical energy of a drive system into electric energy to regenerate the electric energy, and electrically braking and auxiliary accelerating the engine crankshaft. The present invention relates to a drive device when an induction machine is mounted on a flywheel and a wet clutch (hydraulic clutch), and more particularly to a winding structure of an induction machine and a shield structure for oil on the clutch side of an iron core.

[0002]

2. Description of the Related Art Recently, as a vehicle with a retarder, the applicant of the present invention installed an induction machine on a flywheel having a large inertia mass and an outer diameter on the engine side of a transmission in a drive system from the engine. A retarder device that is controlled dynamically has been proposed. This retarder device operates an induction machine as a generator at the time of deceleration to electrically brake, and in particular compensates for a decrease in engine braking effect due to downsizing of an engine of a large vehicle. At this time, the induction machine converts mechanical energy into electric energy. It changes and regenerates into a battery. In addition, at the time of starting and accelerating, the aim is to reduce the fuel consumption and exhaust gas by operating the induction machine as a motor driven by a battery power source for auxiliary acceleration.

Further, in a large vehicle, a double clutch is operated during a gear shift operation, and the frequency of clutch engagement / disengagement is very high. Therefore, the amount of heat generated by the clutch is large. Therefore,
To cope with such a clutch, a wet clutch is used. It is known that this wet clutch facilitates connection and disconnection of a frequently used clutch and effectively cools heat generated by the clutch.

Therefore, in order to further improve various characteristics of the vehicle, it is attempted to further combine the induction machine of the retarder device in this position with the wet clutch mounted on the flywheel of the drive system. Has been.

[0005]

By the way, when the electrically driven induction machine is arranged close to the wet clutch in the vehicle drive system, it is inevitable that the stator side and the rotor side of the induction machine are connected to the clutch side. The splashed oil will cause problems such as electric leakage. In addition, it is essential for the induction machine to have the fixed side iron core and the fixed side iron core facing each other with a predetermined gap to maintain good magnetic circuit characteristics.If oil enters this gap, its magnetic characteristics will be impaired. It causes such problems as For this reason, it is necessary to shield the stator and rotor of the induction machine so as to prevent oil from adhering to the stator and rotor, and to prevent the oil from entering the gap between the two iron cores.

The present invention has been made in view of this point, and in an arrangement in which an electrically operated induction machine is arranged close to a wet clutch of a vehicle drive system, the induction machine side is suitable for the oil on the clutch side. The purpose is to ensure that the electrical and magnetic characteristics are always excellent by properly shielding.

[0007]

To achieve this object, the present invention provides an induction machine between a flywheel connected to the crankshaft of an engine and a flywheel housing inside a closed flywheel housing. Is mounted, and the flywheel is configured to be transmitted to the transmission input shaft through a wet clutch having a sealed structure.

[0008]

According to the above-described structure of the present invention, the wet clutch mounted between the flywheel and the transmission input shaft has a sealed structure and is shielded so as to prevent oil from scattering. Is always kept dry. As a result, the induction machine installed inside the flywheel housing is maintained in a normal operating state electrically and magnetically without being affected by oil etc., and the drive system is electrically braked and assisted while the vehicle is running. It will be possible to operate like.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. The drive system of the vehicle with the retarder will be described with reference to FIG. Reference numeral 1 is an engine, 2 and 3 are flywheel housings which are divided into two in the axial direction, and 4 is a transmission. Inside the flywheel housings 2 and 3, a drive plate 8 is integrally coupled with a coupling member 7 to the end of the crankshaft 5 of the engine 1 with bolts 9, and the flywheel 11 is coupled to the drive plate 8 with bolts 10.
Are connected. Then, the induction machine 21 of the retarder device 20 is mounted between the outer peripheral portion of the flywheel 11 and the flywheel housings 2 and 3. The input shaft 12 of the transmission 4 is attached to the flywheel 11 at the tip of the bearing 1.
A wet type clutch 40 is provided between the flywheel 11 and the input shaft 12 so as to be coaxial with the flywheel 11 and the input shaft 12.

The induction machine 21 includes a stator core 23 fitted on the inner circumference of a stator ring 22, a stator winding 24 arranged on the circumference of the stator core 23, and a stator portion 21a composed of an outlet wire 25, and a rotor. The rotor core 27 fitted around the ring 26 and the retaining ring 2 on the circumference of the rotor core 27.
8 and a rotor portion 21b composed of a squirrel cage winding 29. Here, the induction machine 21 can operate electrically efficiently when the mounting position is farther from the center. Therefore, the flywheel housings 2 and 3 are formed to have a large diameter, and the stator portion 21a is provided inside the flywheel housings 2 and 3 by the bolts 30 with the stator ring 22 sandwiched between the joint portions. Tightened and fixed. Further, the rotor portion 21b is positioned and fixed to the step portion 11a on the outer periphery of the flywheel 11 with the bolt 31.

In this case, the stator portion 21a and the rotor portion 21
The b is disposed outside the substantially same position as the wet clutch 40, and the iron cores 23 and 27 of both are aligned in the axial direction and are radially opposed to each other with a predetermined gap. The outlet line 25 of the stator portion 21a is connected to the electric control device 32. The boss portion 2 of the flywheel housing 2
A seal 14 is installed between a and the connecting member 7 to prevent intrusion of dust and the like, and the flywheel housing 2
A heat radiation fin 15 that radiates the heat generated by the induction machine 21 is provided.

The wet clutch 40 includes a flywheel 11
A bowl-shaped clutch case 41 is integrally connected to the side of the with a bolt 42, and a clutch chamber 43 is formed between them. Inside the clutch chamber 43, a plurality of thin annular clutch plates 44 are accommodated in the clutch case 41 by spline fitting.
The clutch disks 45 are alternately arranged between the four. The clutch disc 45 is connected to a clutch hub 47 via a damper spring 46 and the like, and the clutch hub 47 is connected to the input shaft 12 by spline fitting. Further, the plates inside the clutch case 41 and the disks 44, 45
A plurality of piston chambers 48 are circumferentially arranged on the side opposite to the piston chamber 48. A piston 49 projects into the piston chamber 48 by the clutch hydraulic pressure and presses the plate 44 and the disc 45 so that the clutch is connected. ..

On the other hand, the rear flywheel housing 3
A boss portion 3b having high rigidity is formed on the center side of the wall portion 3a, and a bearing 50 is provided between the input shaft 12 and the rear portion of the boss portion 3b. Further, the guide 51 also serving as the pump side plate, the oil pump 52, and the valve body 53 are integrally connected by the bolt 54, and these are connected to the oil pump 5.
The second case 52a is fixed to the front of the boss portion with a bolt 55 so as to be installed around the input shaft 12. A tubular connecting member 56 is provided between the guide 51 and the valve body 53.
Is rotatably inserted, the front end of the connecting member 56 is in the clutch case 41, and the rear end thereof is the rotor 5 of the oil pump 52.
2b are connected to each other, and the pump is always driven by the power when the engine is operating.

A hydraulic circuit (not shown) is formed in the valve body 53, and a solenoid valve 57 to which an electric signal is input is input.
The valve body 53 is connected to the piston chamber 48 via the connecting member 56 and the oil passage 58 of the clutch case 41. The clutch chamber 43 is made wet by containing a predetermined oil, but the inner peripheral portion of the clutch case 41 is slidably contacted with the clutch hub 47 via the oil seal 59, and the valve body 53 and the connecting member 56 are connected. An oil seal 60 is also provided between them, and the clutch chamber 43 and the like have a completely sealed structure.

Next, the operation of this embodiment will be described. First, during operation of the engine 1, the flywheel 11 is rotated by the crankshaft 5 via the drive plate 8 to reduce the rotational fluctuation thereof. At this time, the rotor portion 21b of the induction machine 21 and the clutch case 41 side of the wet clutch 40 together. Rotate to. The rotation of the clutch case 41 is further transmitted to the rotor 52b of the oil pump 52 via the coupling member 56, whereby the oil pump 52 can be driven to generate a predetermined clutch hydraulic pressure in the valve body 53.

Therefore, when starting the vehicle, the solenoid valve 5
When the clutch hydraulic pressure is supplied to the piston chamber 48 of the wet clutch 40 through the oil passage 58 by 7, the piston 49 projects and the clutch plate 44 and the clutch disc 45 of the clutch chamber 43 are smoothly crimped through the oil to connect the clutch. To do. Then, the engine power of the flywheel 11 is input to the transmission 4 via the clutch disc 45, the clutch hub 47, and the input shaft 12, and the power is further transmitted to the wheels to drive the vehicle. On the other hand, when the clutch hydraulic pressure is drained by the solenoid valve 57 at the time of shifting or stopping, the clutch plate 44 and the clutch disc 45 are disengaged and the clutch is disengaged.

At the time of connecting and disconnecting the clutch, the clutch chamber 43 and the valve body 53 of the wet clutch 40 are connected.
However, the components such as the clutch case 41 and the oil seal 5
It is completely sealed by 9,60 and is shielded so that oil does not scatter. Therefore, the periphery of the wet clutch 40 is always kept in a dry state inside the flywheel housings 2 and 3, so that the stator portion 21a and the rotor portion 21b of the induction machine 21 and the gap between them are prevented from adhering oil. It is possible to operate normally without being affected by the electric and magnetic effects of oil.

Therefore, when the vehicle travel is decelerated, a rotating magnetic field delayed from the shaft rotation speed is applied to the stator portion 21a of the induction machine 21 by the electric control device 32, and when it operates as a generator, the rotation of the rotor portion 21b is prevented. A decelerating electromagnetic force is exerted, and thus electric braking is performed to increase the engine braking effect. At this time, the induction machine 21 converts the mechanical energy of the drive system into electrical energy and regenerates it in the battery. When the electric control device 32 applies this battery power to the stator portion 21a at the time of starting and accelerating, and at the same time, a rotating magnetic field faster than the shaft rotation speed is applied to operate as an electric motor, it is applied to the drive system via the rotor portion 21b. Since the auxiliary driving force is applied, the output torque characteristic is improved in this way.

Although the embodiments of the present invention have been described above, the present invention is not limited thereto.

[0020]

As described above, according to the present invention,
In a drivetrain of a vehicle with a retarder, a wet clutch is configured to shield oil by itself inside a closed flywheel housing, so the induction machine installed inside the flywheel housing is affected by oil etc. It is possible to always operate normally without receiving any. An oil pump and a valve body are arranged adjacent to the wet clutch, and the oil pump and the valve body are configured in a sealed manner including them, so that the sealing effect is large. Since the wet clutch side is configured to be hermetically sealed, the degree of freedom in mounting the induction machine is increased, useless oil scattering and increase in the amount of oil used are prevented, and the overall structure is extremely miniaturized.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of a drive device for a vehicle with a retarder according to the present invention.

[Explanation of symbols]

 2, 3 Flywheel housing 5 Crankshaft 11 Flywheel 12 Transmission input shaft 20 Retarder device 21 Induction machine 40 Wet clutch

Claims (2)

[Claims] 1. An induction machine is mounted between a flywheel connected to a crankshaft of an engine and a flywheel housing inside a sealed flywheel housing, and the flywheel is mounted via a wet clutch having a sealed structure. A drive device for a vehicle with a retarder, characterized in that it is configured to transmit power to a transmission input shaft. 2. The wet clutch includes a clutch case integrally connected to a side of a flywheel, a clutch plate and a clutch disc alternately arranged in a clutch chamber between the two and engaged by a piston, and a clutch case. 2. The retarder-equipped vehicle according to claim 1, further comprising an oil pump, a valve body, and an oil seal installed on each sliding contact portion, which are installed coaxially adjacent to each other. Drive.