JPH05171930A - Energy recovering device - Google Patents

Abstract

PURPOSE:To provide an energy recovering device in which a recovering motor is provided with a function of a starter and a function of supplying driving force to a drive shaft by changing gears in starting an engine and transmitting power. CONSTITUTION:An energy recovering device comprises recovering motor 5 disposed in a power transmission system bypassing a transmission 7, and the recovering motor 5 is provided with a gear for starting which can be connected ton an engine 1, and a gear 10 for power transmission which can be connected to a drive shaft. At starting the engine 1, the gear 3 for starting is connected to the engine 1 by a connection means 4, and at transmission of power, the gear 10 for power transmission is connected to the drive shaft 13 rearward of the transmission 7 by a connection means 16. The recovering motor 5 has a function of a starter motor and a function of returning a recovered energy to a drive system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an energy recovery device having a recovery motor driven by recovery energy of exhaust gas energy of an engine.

[0002]

2. Description of the Related Art Conventionally, in an engine equipped with a recovery motor that operates with the exhaust gas energy of the engine, a turbocharger, an energy recovery turbine, etc. are connected downstream of an exhaust pipe such as an exhaust manifold connected to an exhaust port. The generated exhaust gas energy is recovered by a turbocharger, energy recovery turbine, etc. to drive a compressor, transmit power to a drive shaft such as a crankshaft, or store electricity in a battery, condenser, etc. as electric energy by a generator / motor. is doing.

Generally, a turbocharger having a power generator / motor or a recovery motor driven by electric energy recovered by a turbine having a power generator / motor, that is, an energy recovery device is provided on the engine side. Power is returned to the crankshaft.

Further, as an exhaust energy recovery system for an engine, there is one disclosed in Japanese Patent Application Laid-Open No. 58-214615. The exhaust energy recovery system of the engine is
It suppresses the heat radiation of the heat generated inside and is equipped with an exhaust turbine.The rotary shaft of the AC generator is directly connected to the turbine shaft of the exhaust turbine, and the rotary shaft of the DC motor is connected to the rotary shaft of the engine. The electric energy generated from the AC generator is applied to a DC motor to drive it, and the output of the AC motor is fed back to the output shaft of the engine.

[0005]

However, when the energy recovered by the turbocharger or the energy recovery device is consumed by the recovery motor, the recovery motor is attached to the engine side and the power is returned to the crankshaft via the transmission. Then, in the drive system in which the power is transmitted to the drive wheels, the drive force of the recovery motor is transmitted to the transmission, so that the gear loss of the transmission causes power loss. In order to eliminate this power loss, it is advantageous to arrange the recovery motor in the downstream of the transmission. However, since the recovery motor also serves as a starter in general, the recovery motor is provided in the downstream of the transmission. In that case, a starter must be provided separately from the recovery motor.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems, and a recovery motor is provided with a starting gear of an engine and a power transmission gear for transmitting power to a drive shaft, that is, a drive shaft, An object of the present invention is to provide an energy recovery device in which a recovery motor has a function of a starter and a function of supplying driving force to a drive shaft by switching gears at the time of starting and power transmission.

[0007]

In order to achieve the above object, the present invention is configured as follows. That is,
The present invention relates to an energy recovery apparatus including a recovery motor driven by recovery energy of exhaust gas energy of an engine, a recovery motor provided in a power transmission system bypassing a transmission, and the recovery connectable to the engine. A starting gear provided on the motor, a power transmission gear provided on the recovery motor that is connectable to a drive shaft of the downstream of the transmission, the start gear connected to the engine at the time of engine start, and the power transmission at the time of power transmission. The present invention relates to an energy recovery device having switching means for performing switching to connect a power transmission gear to the drive shaft.

[0008]

The energy recovery device according to the present invention is constructed as described above and operates as follows. That is, in this energy recovery device, a recovery motor is provided by bypassing a drive system of a transmission, a starting gear provided in the recovery motor is connected to an engine at the time of starting, and a power transmission gear provided in the recovery motor is provided. Since it is configured to be switchable so as to be connected to the drive shaft at the time of power transmission, the engine can be started by the recovery motor at the time of engine start,
At this time, the recovery motor is not connected to the drive shaft via the power transmission gear. Also, after starting the engine,
By switching the gears and connecting the power transmission gear attached to the recovery motor to the reduction gear to bring the power transmission state, the drive of the drive shaft can be assisted by the recovery motor.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the energy recovery device according to the present invention will be described below with reference to the drawings. 1 is a schematic explanatory view showing an embodiment of an energy recovery device according to the present invention and showing a state at the time of engine start, and FIG. 2 is an explanatory explanatory view showing a state at the time of power transmission of the energy recovery device of FIG. ..

As shown in the figure, this energy recovery device is a turbocharger having a generator / motor, that is, a rotating electric machine driven by exhaust gas energy of an engine, or an energy recovery turbine having a generator driven by exhaust gas energy. It can be applied to the engine 1 that it has. The exhaust gas energy recovered by the turbocharger or the energy recovery turbine can be stored or stored in a battery, a condenser or the like, or the recovery motor 5 can be directly rotated to drive the drive shaft.

This energy recovery device includes a recovery motor 5
The recovery motor 5 is configured to consume the electric energy recovered by the turbocharger or the energy recovery turbine. Therefore, the recovery motor 5 is driven by electric power supplied from a battery or a capacitor capable of storing a large amount of electricity, or supplies electric energy from a generator / motor provided in a turbocharger or a generator provided in an energy recovery turbine. Is driven.

A clutch 6 and a transmission 7 are incorporated in the drive transmission system of the engine 1 incorporating this energy recovery device, and the driving force of the output shaft 11 of the engine 1 is
It is transmitted to the drive shaft or drive shaft 13 through the clutch 6 and the transmission 7. That is, in the drive transmission system of the engine 1, the ring gear 2 is connected to the output shaft 11 connected to the crankshaft of the engine 1 via a flywheel or the like. The ring gear 2 is drivingly connected to the input shaft 12 via a clutch 6. Further, the input shaft 12 is drivingly connected to the drive shaft 13 via the transmission 7.

In this energy recovery device, the recovery motor 5 is provided by bypassing the drive transmission system of the transmission 7. A recovery gear 9 is attached to the drive shaft 13. The recovery gear 9 is meshed with the reduction gear 8. Further, the recovery motor 5 is provided with a starting gear 3 that can be connected to the ring gear 2 and a power transmission gear 10 that can be connected to the reduction gear 8. That is, the starting gear 3 is attached to one output shaft 14 of the recovery motor 5 via the coupling device 4 which is a switching means including a yoke, a sleeve and the like. Further, the power transmission gear 10 is attached to the other output shaft 15 of the recovery motor 5 via a coupling device 16 which is a switching means including a yoke, a sleeve and the like. These connecting devices 4 and 16 are not shown,
It can be configured as a coupling device having dog teeth or a synchronizing device.

This energy recovery device includes a recovery motor 5
Is connected to the engine 1 at the time of starting, and the transmission 7 is connected at the time of power transmission.
The connecting devices 4 and 16 are configured to be switchable so as to bypass and connect directly to the drive shaft 13. That is, when the engine is started, as shown in FIG. 1, the coupling device 4 is actuated to engage the ring gear 2 with the starting gear 3 so that the recovery motor 5 applies a driving force to the engine 1. When the engine 1 is started, the coupling device 16 is in a non-meshing state in which the power transmission gear 10 and the reduction gear 8 are cut off.

After the engine 1 is started, the coupling device 4 disengages the ring gear 2 and the starting gear 3 from each other to bring them into a disconnected state, and the recovery motor 5 is stopped. Next, when the drive shaft 13 needs a large drive force, for example, when the load is high, when the vehicle starts rapidly, or when energy is recovered, the recovery motor 5 supplies the drive force to the drive shaft 13. At that time, as shown in FIG. 2, the connecting device 16 is operated to connect the power transmission gear 10 to the reduction gear 8, and the driving force from the recovery motor 5 is transmitted through the power transmission gear 10 and the reduction gear 8 to the drive shaft 13. To be transmitted to. When the recovery motor 5 is coupled to the drive shaft 13, the coupling device 4 disconnects the ring gear 2 and the starting gear 3 from each other. Further, when the recovery motor 5 is connected to the drive shaft 13, the recovery motor 5 needs to be in a non-driving state when the vehicle is stopped.

Since this energy recovery device is constructed as described above, the recovery motor 5 has a function of functioning as a starter motor for starting the engine and a function of recovering energy to return the recovered energy to the drive shaft 13. become. Therefore, if this recovery motor 5 is incorporated into the engine 1, it is not necessary to provide a separate starter motor,
The recovery motor 5 can start the engine, and moreover, the recovery motor 5 can be secured in a state in which it is disposed in the downstream of the transmission 7 bypassing the transmission 7, and the drive force is supplied from the recovery motor 5 to the drive shaft 13. When this occurs, no power loss will occur due to the gear loss of the transmission 7.

[0017]

The energy recovery device according to the present invention is
It is configured as described above and has the following effects. That is, this energy recovery device is provided with a recovery motor that bypasses the transmission and is disposed in the power transmission system, a starter gear that is provided in the recovery motor that can be connected to the engine, and a drive shaft that is downstream of the transmission. A power transmission gear provided to the connectable recovery motor, and a switching means for switching between connecting the starting gear to the engine when the engine is started and connecting the power transmission gear to the drive shaft when the power is transmitted. Therefore, the recovery motor can be driven to perform the function of the starter motor and the function of energy recovery by switching the switching means.

[Brief description of drawings]

FIG. 1 shows an embodiment of an energy recovery device according to the present invention and is a schematic explanatory view showing a state at the time of engine start.

FIG. 2 is a schematic explanatory view showing a state during drive transmission of the energy recovery device of FIG.

[Explanation of symbols]

 1 Engine 2 Ring Gear 3 Engine Starting Gear 4 Coupling Device (Switching Means) 5 Recovery Motor 6 Clutch 7 Transmission 8 Reduction Gear 9 Recovery Gear 10 Power Transmission Gear 11 Output Shaft

Claims (1)

[Claims] 1. An energy recovery apparatus having a recovery motor driven by recovery energy of exhaust gas energy of an engine, wherein the recovery motor is provided in a power transmission system by bypassing a transmission, and the recovery motor is connectable to the engine. A starter gear provided on the recovery motor, a power transmission gear provided on the recovery motor that can be connected to a drive shaft of the downstream of the transmission, and a starter gear connected to the engine at the time of engine start and at the time of power transmission. An energy recovery device comprising switching means for switching the power transmission gear to the drive shaft.