JPH0618043Y2 - Adiabatic engine equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an engine of an automobile or the like, and more particularly to an adiabatic engine device having a housing surrounding an adiabatic engine having an energy recovery device. The turbocharger generator as an energy recovery device here has a turbine and a compressor, an AC machine is provided between both blades, and has a turbocharger function and a generator / motor function.

[Conventional technology]

Conventionally, various proposals have been made for recovering exhaust gas energy of an internal combustion engine.

As an exhaust gas energy recovery device, a turbine driven by the energy of exhaust gas of an internal combustion engine, a compressor mounted on a rotary shaft driven by the turbine and supercharging intake air into a cylinder, and arranged on the rotary shaft A so-called turbocharger generator having an electric motor / generator that is an alternating current machine and operating the electric motor / generator as an electric motor or a generator according to an operating state of an internal combustion engine is disclosed in, for example, JP-A-60- It is disclosed in Japanese Patent Publication No. 195329.

Further, a heat insulating engine having a heat insulating structure such as a combustion chamber wall in order to effectively use the energy of exhaust gas of an internal combustion engine is disclosed in, for example, Japanese Utility Model Publication No. Sho 60-36539.

On the other hand, a so-called enclosure engine in which the internal combustion engine is surrounded by a sound insulating plate in order to reduce the noise of the internal combustion engine is disclosed in, for example, Japanese Utility Model Publication No. 52-26032.

[Problems that the device tries to solve]

However, since the exhaust gas energy recovery device is disposed on the side of the internal combustion engine body, particularly in the V-type engine in which the left and right banks are spread laterally upward, the internal combustion engine including the energy recovery device Large lateral dimension,
Enclosure of this with a sound-insulating plate increases the size of the entire device, which causes problems, for example, mounting on a vehicle and interference with other in-vehicle devices and parts.

In addition, when an ordinary internal combustion engine is enclosed by a sound insulating plate, the temperature inside the sound insulating plate rises, so it is necessary to equip a cooling device for cooling this.

[Purpose of device]

The object of the present invention is that the energy of exhaust gas of an engine can be effectively recovered by an energy recovery device, and the engine and the energy recovery device can be configured in a small and compact enclosure.
An object is to provide an adiabatic engine device that does not need to be equipped with a cooling device.

[Means for solving problems]

To achieve the above object, the present invention provides a V-type adiabatic engine in which a combustion chamber wall and an exhaust system are adiabatic structure made of a ceramic material or the like so as to be cooling-less, and the V-type adiabatic engine provided in the exhaust system. An energy recovery device arranged along the outer wall surface of the bank constituting the above-mentioned bank, and a housing made of a substantially cylindrical iron plate or the like that encloses the V-type adiabatic engine and the energy recovery device. A heat insulating engine device is provided.

Further, in this adiabatic engine device, the energy recovery device is provided on each side of the left and right banks constituting the V-type adiabatic engine, and is provided in the exhaust system corresponding to each bank.

[Action]

The present invention is configured as described above and operates as follows. That is, in this adiabatic engine device, the surroundings of the combustion chamber and the exhaust system are configured as an adiabatic structure, so that exhaust gas heat does not flow out from the cylinder head, the exhaust system, etc., and the exhaust gas acts on the energy recovery device in a high temperature state. In order to
Exhaust gas energy can be effectively recovered.

In addition, the surroundings of the combustion chamber and the exhaust system have a heat insulating structure, so that the outer wall of the engine does not reach a high temperature, and thermal energy is not accumulated between the outer wall of the housing and the outer wall of the engine even when it is wrapped in the housing. Therefore, it is not necessary to equip a cooling device.

Further, the energy recovery device is arranged along the outer wall surface of the bank forming the V-type engine, and the V-type heat insulating engine and the energy recovery device are wrapped in the housing made of a substantially cylindrical iron plate or the like, which is small and compact. It has a unique enclosure configuration.

〔Example〕

Hereinafter, an embodiment of the heat insulating engine device according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic sectional view showing an example of an adiabatic engine for explaining the present invention. In FIG. 1, an adiabatic engine device including an energy recovery device 25 such as a turbocharger generator and an adiabatic engine 1 is generally indicated by reference numeral 10. The energy recovery device 25 is composed of a turbine 4, a compressor and an AC machine here, and sends intake air to the engine by the exhaust energy of the exhaust gas and recovers the exhaust energy as electric energy by the AC machine.

The turbine blade 22 receives the flow of exhaust gas sent to the turbine scroll 28, that is, receives the energy of exhaust gas, and rotates, and the exhaust gas flows in the direction of arrow C. Further, the intake air is introduced into the compressor (not shown) of the energy recovery device 25 from the intake pipe 48 as shown by the arrow A, and the intake air sent from the compressor is further passed through the air passage 29 as shown by the arrow A. It serves to feed the intake manifold 11 of the adiabatic engine 1.

Regarding the heat insulating engine 1 in the heat insulating engine device 10, a cylinder head 1 that constitutes a combustion chamber 13 of the engine
2 cylinder head lower surface 15 and cylinder liner upper portion 1
9 is formed of a ceramic material such as silicon nitride and silicon carbide, and a heat insulating structure is formed by interposing a ceramic material such as potassium titanate whiskers and alumina fibers, and a heat insulating material 23 such as carbon between the cylinder head 12 and the like. is doing. Further, a cylinder liner 8 made of a ceramic material or the like is also fitted to the cylinder body 7.

Further, the piston 9 has a heat insulating structure, and the piston head 31 is made of a ceramic material such as silicon nitride or silicon carbide, and is attached to the piston skirt 33 via a heat insulating material 32 made of a ceramic material, carbon or the like. It is fixed. Although the combustion chamber is formed in the piston head 31 in the drawing, the piston head is not limited to this structure, and it goes without saying that the piston head may be formed of a thin disk.
Further, each cylinder head 12 of the heat insulating engine 1 is in communication with the exhaust manifold 5 and then the turbine scroll 28 via each exhaust port 6. The exhaust port liner 30 that constitutes the exhaust port 6 has a heat insulating structure made of a ceramic material, a heat insulating material, or the like.

Further, the exhaust port 6 is similarly provided with a heat insulating structure such as a ceramic member, a heat insulating material 34, etc.
Are connected. Further, the exhaust manifold 5 is connected to a turbine scroll 28 which is similarly formed into a heat insulating structure by a ceramic member, a heat insulating material 36, and the like. Then, the exhaust gas from the exhaust manifold 5 is configured to be sent to the turbine 4 of the turbocharge generator 25 through the turbine scroll 28. The turbine 4 is connected to an exhaust pipe 35, which is similarly formed into a heat insulating structure by a ceramic member, a heat insulating material 37, etc., and the exhaust pipe 35 may be connected to a turbine 2 as shown in FIG. 2 or FIG. It can also be connected to the turbine 38 of the energy recovery system 40 of the stage.

Regarding the adiabatic engine device 10 including the adiabatic engine 1 and the energy recovery device 25 configured as described above,
A combustion chamber wall composed of a piston head upper surface 31, a cylinder head lower surface 15 and a cylinder liner upper portion 19, an exhaust port 6, an exhaust manifold 5, a turbine scroll 28.
By constructing the exhaust system consisting of the exhaust pipe 35 and the exhaust pipe 35 in a heat insulating structure, it is possible to prevent the engine outer wall from reaching a high temperature, so that it is possible to construct a cooling-less system in which a cooling system such as a water jacket or fins is eliminated. The entire structure including the engine 1 and the energy recovery device 25 provided in the exhaust system can be configured to be small and lightweight in a compact structure.

Therefore, the heat insulating engine device 10 can be configured such that the whole structure including the heat insulating engine 1 and the energy recovery device 25 can be easily wrapped by the housing 50 which is a kind of capsule made of a sound insulating plate such as an iron plate.

Moreover, since the outer wall of the heat insulating engine 1 does not reach a high temperature, even if it is wrapped in the housing 50,
The heat does not accumulate between the heat insulating engine 1 and the housing 50 to reach a high temperature, and the heat is not adversely affected. In this case, the area around the exhaust pipe 35 and the intake pipe 48 for introducing intake air through the housing 50 is sealed with the rubber 39 for sealing around the exhaust pipe 35 and the intake pipe 48.

Although the oil cooling system in the oil pan 41 forming the crank chamber is not shown,
The oil may be guided to the outside of the housing 50 by an oil pipe or the like and cooled by an oil cooler or the like. In the figure, reference numeral 24 represents an exhaust valve.

Next, an embodiment of the heat insulating engine device 10 according to the present invention will be described with reference to FIGS. 2 and 3. The second
1 and 2, the adiabatic engine device 1 shown in FIG.
The same reference numerals are given to the same components as 0, and the description thereof will be omitted.

The adiabatic engine device 10 in this embodiment is a 6-cylinder engine having three cylinders in the right bank and three cylinders in the left bank. In FIG. 2, one left bank cylinder 46 (right side of the figure) and two right bank cylinders 47 (left side and center of the figure) are shown. In FIG. 3, a side view of a V-engine is shown, with cylinder 46 in the left bank and cylinder 4 in the right bank.
7 are shown.

In this adiabatic engine device 10, similarly to the above, the exhaust chamber provided with the combustion chamber wall and the exhaust system of the adiabatic engine 1, the energy recovery device 25 that is a turbocharger generator, and the energy recovery device 40 that does not include the compressor unit. Is configured as a heat insulating structure with a heat insulating material such as ceramic material or carbon, the heat insulating engine 1 is configured to be cooling-less, and the heat insulating engine 1 and the energy recovery devices 25 and 40 provided in the exhaust system are It is characterized in that it is wrapped by a housing 50 such as an iron plate which is a capsule of the above. The combustion chamber wall of the engine is constituted by the piston head upper surface 31, the cylinder head lower surface 15 and the cylinder liner upper portion 19, and the cooling-less construction makes it possible to eliminate the portion indicated by the chain double-dashed line H in FIG. The engine itself can be made smaller and lighter.

The exhaust system includes an exhaust port 6, an exhaust manifold 5, a turbine scroll 28 of an energy recovery device 25, an exhaust pipe 35, a turbine scroll 45 of an energy recovery device 40, and an exhaust pipe. Moreover, the energy recovery device 25 and the energy recovery device 40 are arranged along the outer wall surfaces of the left and right banks of the V-type engine, respectively, and the housing 50 enclosing the heat insulating engine 1 and the energy recovery devices 25 and 40 is substantially cylindrical. It is formed into a shape, and is compact and small in size and light in weight.

The energy recovery device 25, which is a turbocharger generator, mainly includes a turbine 4 driven by the exhaust gas of the adiabatic engine 1, a compressor 2 supercharged by driving the turbine 4, and an AC machine 3 driven by the turbine 4. It has the function of a turbocharger that sends intake air to the engine and the function of a generator / motor that recovers exhaust energy. For the turbine 4, turbine blades 22 are arranged in the turbine housing 18, and for the compressor 2, the compressor impeller 2 is arranged in the compressor housing 17.
1 is arranged. Further, the compressor impeller 21 and the turbine blade 22 are fixed to both ends of the shaft 20.

The AC machine 3 is described in the above-mentioned JP-A-60-1953.
Like the turbocharger for an internal combustion engine disclosed in Japanese Patent Publication No. 29, etc., it can act as a motor / generator.
The AC machine 3 is composed of a magnet rotor, a stator coil, etc., which is a permanent magnet arranged in the center of a shaft 20 penetrating the center housing 16 and extending in the axial direction.

The shaft 20 is rotatably supported by a bearing fixed to the center housing 16. Although not shown, it goes without saying that the bearings can be arranged in a structure in which they are supported in a pair between the turbine 4 and the AC machine 3.

The alternator 3 is driven by the turbine 4 and induces a current in the stator coil to return the current to the power supply side, that is, the regenerative current can be charged into the battery or used as a load. .

Next, regarding the energy recovery device 40, the turbine 3
8 and an AC machine 42, and no compressor is provided. This energy recovery device 4
In the turbine scroll 45 of the turbine 38 at 0, the exhaust pipe 35 of the turbocharger generator 25 is attached.
Are connected.

Therefore, the exhaust energy of the exhaust gas of the adiabatic engine 1 is first recovered by the energy recovery device 25 of the first stage, but the remaining energy energy of the exhaust is recovered by the energy recovery device 40 of the second stage. That is, the permanent magnet of the AC machine 42 is attached to the rotating shaft 43 of the turbine 38, and it can be recovered as electric energy according to the rotation of the rotating shaft 43 in the same manner as the energy recovery device 25. In the figure, 44 is a crankshaft.

By configuring the heat insulating engine device 10 as described above, the combustion chamber wall of the heat insulating engine 1 and the cylinder head 1
The exhaust system from 2 to the turbine 4 or the turbine 38 can be completely constructed as a heat insulating structure.

With such a configuration, it is possible to prevent the exhaust energy of the exhaust gas exhausted from the adiabatic engine 1 from flowing out through the cylinder head, the intermediate path of the exhaust system, and the like, and the exhaust energy is installed in the first stage energy recovery device 25 downstream. And the second stage energy recovery device 40 can recover all. Further, when it is necessary to cool the lubricating oil, it goes without saying that the cooling device may be taken out of the capsule, which is the housing 50, in the same manner as in the description of FIG.

[Effect of device]

Since the heat insulation engine device according to the present invention is configured as described above, it has the following unique effects. That is, in this invention, since the combustion chamber and the exhaust system are constructed as a heat insulating structure, the exhaust gas heat does not flow out from the cylinder head, the exhaust system, etc., and the exhaust gas acts on the energy recovery device in a high temperature state. The exhaust gas energy can be effectively recovered.

In addition, the surroundings of the combustion chamber and the exhaust system have a heat insulating structure, so that the outer wall of the engine does not reach a high temperature, and thermal energy is not accumulated between the outer wall of the housing and the outer wall of the engine even when it is wrapped in the housing. Therefore, it is possible to obtain an enclosure-type heat insulating engine device that does not need to be equipped with a cooling device.

Further, the energy recovery device is arranged along the outer wall surface of the bank forming the V-type engine, and the V-type heat insulating engine and the energy recovery device are wrapped in the housing made of a substantially cylindrical iron plate or the like, which is small and compact. An enclosure type adiabatic engine device can be obtained.

Therefore, the heat insulating engine device can be arranged very conveniently even in a small space in a vehicle or the like, and the outer surface of the housing is formed by a smooth surface, so that the heat insulating engine device excellent in aesthetics can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an example of a heat insulation engine device, FIG. 2 is a schematic view showing an embodiment of a heat insulation engine device according to the present invention, and FIG. 3 is a side view of FIG. 1 ... Adiabatic engine, 2 ... Compressor, 3, 42 ...
... AC machine, 4, 38 ... turbine, 5 ... exhaust manifold, 6 ... exhaust port, 8 ... cylinder liner, 9 ...
Piston, 10 ... Adiabatic engine device, 12 ... Cylinder head, 13 ... Combustion chamber, 15 ... Cylinder head lower surface, 19 ... Cylinder liner upper part, 23, 30, 34,
36, 37 ... Insulation material, 25, 40 ... Energy recovery device, 28 ... Turbine scroll, 50 ... Housing.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location F02B 61/00 E 7541-3G 75/22 A 7541-3G 77/11 D 7541-3G

Claims (2)

[Scope of utility model registration request] 1. A V-type adiabatic engine in which a combustion chamber wall and an exhaust system are adiabatic structure made of a ceramic material or the like without cooling, and an outer wall surface of a bank which is provided in the exhaust system and constitutes the V-type adiabatic engine. An adiabatic engine device comprising: an energy recovery device arranged along the line; and a housing made of a V-shaped adiabatic engine and a substantially cylindrical iron plate that encloses the energy recovery device. 2. The energy recovery device is disposed on each side of the left and right banks constituting the V-type heat insulation engine,
The heat insulating engine device according to claim 1, wherein the heat insulating engine device is provided in an exhaust system corresponding to each bank.