JP2001097051A - Hybrid car - Google Patents

Abstract

(57) [Summary] [PROBLEMS] Even if water leaks from a water piping system on the front side of an engine, the motor terminal is prevented from getting wet as much as possible. SOLUTION: In an engine room, a water piping system mainly for engine cooling water such as a radiator 22 and a water piping A23 is disposed in front of an engine 1. On the left rear side of the engine 1, three connection terminals 2a of a motor A2 disposed immediately to the left of the engine 1 are disposed upward in the engine room.
Is connected to the connection terminal 18a. For this reason, even if water leaks from the radiator 22 or the water pipe A23 due to any cause such as an accident, the leaked water has a high height, and if the water does not exceed the high temperature engine 1, the three motors A2 The connection terminal 2a cannot reach the connection terminal 2a, and there is little possibility that the connection terminal 2a gets wet with water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hybrid vehicle that prevents a terminal of a generator / motor and a terminal of a traveling motor from being wetted by a motor in an engine room.

[0002]

2. Description of the Related Art In recent years, for vehicles such as automobiles, hybrid vehicles using both engines and motors have been developed and put into practical use from the viewpoint of low pollution and resource saving. In general, this hybrid vehicle has an engine,
A motor that also functions as a generator or a generator and a traveling motor are provided, and the vehicle travels using at least one of an engine and a motor as a traveling drive source of the vehicle. The battery is supplied when the motor is used as a traveling drive source, and the battery is charged when the generator / motor is operated as a generator or when the engine is driven by the generator / motor or the engine.

[0003]

By the way, in such a hybrid vehicle, a high voltage is applied to the motor as compared with ordinary parts, and therefore, sufficient measures are taken especially for preventing the motor terminals from getting wet. Need to be applied. In particular, in the engine room, a radiator or the like that mainly cools a large amount of water for cooling the engine is arranged on the front side of the engine.
There is a water pipe connecting the radiator and the engine cooling water passage. Therefore, even if water leaks from the radiator or the water pipe on the front side in the engine room for some reason such as an accident, it is desired to take measures to prevent the motor terminals from getting wet as much as possible.

The present invention has been made in view of the above circumstances. For example, even in the case where water leaks from a water piping system on the front side of an engine, a hybrid vehicle capable of preventing the motor terminals from getting wet as much as possible. The purpose is to provide.

[0005]

According to a first aspect of the present invention, an engine and a motor that also serves as a generator or a generator and a traveling motor are provided in an engine room. In a hybrid vehicle having a water piping system in front of an engine, a terminal for electrically connecting the motor is provided behind the engine.

That is, according to the first aspect of the present invention, a water pipe system is provided on the front side of the engine via the engine, and a terminal for electrically connecting the motor is provided on the rear side of the engine. Even if water leaks in the water piping system on the front side of the engine for some reason, such as collision of the engine, the leaked water is not blocked by the engine and goes to the motor terminal, so it is effective to wet the motor terminal Is prevented.

According to a second aspect of the present invention, in the first aspect of the present invention, the terminal for electrically connecting the motor is disposed upward in the engine room. Therefore, even if there is water leaking from below to the rear of the engine, the water does not wet the motor terminals.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 relate to an embodiment of the present invention. FIG. 1 is a perspective view of a main part of the engine room as viewed from obliquely above, FIG. 2 is an explanatory view showing the configuration of a drive system of a hybrid vehicle, and FIG. FIG. 4 is a perspective view of the cylinder block from a diagonally right rear side.

As shown in FIG. 2, the hybrid vehicle according to the present embodiment is a parallel hybrid vehicle that uses an engine and two motors A and B in combination, and includes an engine 1 and an output shaft 1a of the engine 1. A motor A (motor / generator) 2 which is directly connected to perform startup, power generation and power assist of the engine 1, a single pinion type planetary gear unit 3 connected to an output shaft 1 a of the engine 1 extending from the motor A 2, A motor B (running motor) 4 that controls the function of the single pinion type planetary gear unit 3 and serves as a driving force source for starting and reversing and recovers deceleration energy. A drive system having a continuously variable transmission 5 having a conversion function as a basic configuration is provided.

The planetary gear unit 3 includes a sun gear 3
a, a carrier 3b rotatably supporting a pinion meshing with the sun gear 3a, and a ring gear 3c meshing with the pinion, and a lock-up clutch 6 for fastening and releasing the sun gear 3a and the ring gear 3c is provided. ing.

The continuously variable transmission 5 is constructed by winding a drive belt 5e between a primary pulley 5b supported on an input shaft 5a and a secondary pulley 5d supported on an output shaft 5c. Hereinafter, the continuously variable transmission 5 is referred to as CVT5.
It will be described as.

That is, in the drive system of the hybrid vehicle according to the present embodiment, the planetary gear unit 3 having the lock-up clutch 6 interposed between the sun gear 3a and the ring gear 3c includes the output shaft 1a of the engine 1 and the input shaft 5a of the CVT 5. And the sun gear 3a of the planetary gear unit 3 is coupled to the output shaft 1a of the engine 1 via the motor A2, and the carrier 3b is
The motor B4 is connected to the input shaft 5a of T5, and is connected to the ring gear 3c. And the output shaft 5c of the CVT 5
A differential mechanism 8 is continuously provided via a reduction gear train 7, and a drive wheel 10 of a front wheel or a rear wheel is continuously provided to the differential mechanism 8 via a drive shaft 9.

In this case, as described above, the engine 1 and the motor A2 are connected to the sun gear 3a of the planetary gear unit 3 and the motor B4 is connected to the ring gear 3c to obtain an output from the carrier 3b. Since the output is shifted and torque amplified by the CVT 5 and transmitted to the drive wheels 10, the two motors A2 and B4 can be used for both power generation and drive power supply, and a relatively small output motor Can be used.

The sun gear 3a of the planetary gear unit 3 is operated by the lock-up clutch 6 according to the running conditions.
And the ring gear 3c, it is possible to form a drive shaft directly connected to the engine from the engine 1 to the CVT 5 in which the two motors A2 and B4 are arranged, and efficiently transmit the driving force to the CVT 5 Alternatively, a braking force from the driving wheel 10 side can be used.

Next, a description will be given of a control system (hybrid control system) that controls the above-described drive system and controls the running of the hybrid vehicle 1. Reference numeral 15 is composed of a microcomputer and a functional circuit controlled by the microcomputer, and includes an engine 1, two motors A2,
It is a control unit that centrally controls B4 and CVT5.

The control unit 15 detects a driver's driving condition by detecting an operation of depressing an accelerator pedal or a brake pedal, a steering angle of the steering, and the like, and an operating condition of auxiliary equipment such as lights and an air conditioner. And a switch / sensor group 16 are connected to detect the current vehicle running state such as vehicle speed, uphill or downhill, and road surface conditions. The control unit 15 further monitors the operating state of the engine 1, the two motors A2, B4, and the CVT 5 and the state of the battery 17, and controls the engine 1 and the inverter 18 based on various information detected and monitored. ,
Drive of motors A2 and B4 via battery 19 and battery 1
7 and control of the gear ratio and supply oil pressure of the CVT 5.

The driving modes of the hybrid vehicle 1 controlled by the above-described hybrid control system can be broadly classified into the following three basic modes when viewed from the transmission input shaft. The state transition of the mode is repeated.

(1) Series (series & parallel) traveling mode When the vehicle is running at a low speed or traveling backward, the lock-up clutch 6 is released, and the motor 1 is driven by the engine 1 as a generator, and is mainly driven by the motor B4. To run.
At this time, a part of the driving force of the engine 1 is input to the sun gear 3a of the planetary gear unit 3 and the ring gear 3c
And is output from the carrier 3b.

(2) Parallel running mode At high speeds during mid-high speed, the lock-up clutch 6 is engaged and the sun gear 3a and the ring gear 3c of the planetary gear unit 3 are engaged.
The driving force of the engine 1 is added to the driving force of the motor B4 from the ring gear 3c and output from the carrier 3b, and the vehicle travels using the torque of the engine 1 alone or both the engine 1 and the motor B4.

(3) Braking force regeneration mode During deceleration, the braking force is regenerated by the motor B4 in coordination with the brake control. That is, the brake torque according to the depression amount of the brake pedal is cooperatively shared by the regenerative torque by the motor B4 and the braking torque by the brake mechanism,
Perform regenerative braking.

Next, the arrangement of the hybrid vehicle in the engine room will be described with reference to FIGS. 1, 3 and 4. FIG. In the present embodiment, the engine 1 is an in-line four-cylinder horizontally mounted engine, and the motor A2, the motor B4, the planetary gear unit 3, and the C
VT5 is provided in order. In the drawing, a unit indicated by a dashed line indicated by reference numeral 21 indicates the motor A2, the motor B4, the planetary gear unit 3, and the CVT 5 collectively as a motor / drive system.

A radiator 22, which is indicated by a dashed line in the figure, is provided in front of the engine 1. Cooling water flows from the lower left of the radiator 22 toward a water pipe A23 as shown by an arrow A.

The water pipe A23 is provided horizontally in front of the engine 1 and is connected to a cooling water inlet 1b formed at the right end of the engine 1 in front of the cylinder block.
Cooling water flows into a cooling water passage in the engine 1.

A cooling water outlet (not shown) is formed at the left end face of the cylinder head of the engine 1. Cooling water flows into the radiator 22 from the upper center of the radiator 22 as shown by an arrow B. .

In this hybrid vehicle, the motor A
2. The motor B4 is also cooled by the cooling water. In the figure, reference numeral 24 denotes a cooling water pipe of the motor A2 heading into the water pipe A23. Reference numeral 25 denotes a cooling water pipe that extends from a heater (not shown) to the inside of the water pipe A23.

On the other hand, an inverter 18 connected to the motor A2 and an inverter 19 connected to the motor B4 are diagonally provided on the left rear side of the motor / drive system 21. Reference numeral 19 designates three connection terminals 18a and 19a, each of which is disposed forward in the engine room.

The motor A2 disposed immediately to the left of the engine 1 is, for example, a three-phase 240V AC motor, and three connection terminals 2a are provided on the left rear side of the engine 1 and above the engine room. And is connected to the connection terminal 18 a of the inverter 18.

For this reason, even if the front of the engine room is damaged for some reason such as an accident and water leaks from the radiator 22 or the water pipe A23 on the front side of the engine room, the leaked water is removed by the motor. The three connecting terminals 2a of the motor A2 cannot reach the three connecting terminals 2a unless the engine 1 has a height higher than the driving system 21 or the like.
a has a very low possibility of getting wet with water. Further, even if the water leaked from the radiator 22 or the water pipe A23 tries to exceed the engine 1, the leaked water is not only high, but also has a high temperature. The possibility that the connection terminal 2a is evaporated on the surface of the engine 1 and gets wet with water is further reduced. Further, since the connection terminal 2a of the motor A2 is disposed upward in the engine room and upward, even if there is leakage water flowing from the lower side to the rear of the engine 1, the leakage water connects the connection terminal 2a. Never get wet.

In the present embodiment, the vehicle in which the engine cooling water water piping system is mainly provided in front of the engine has been described. However, the present invention is not limited to the engine cooling water water piping system. Also, the engine was described as an in-line 4-cylinder horizontal type,
Other vertical-type engines, engines other than four-cylinders, and V-type engines may be used. further,
The electric vehicle may be an electric vehicle of another control system, or may be an electric vehicle including other components.

[0030]

As described above, according to the first aspect of the present invention, an engine and a motor that also serves as a generator or a generator and a traveling motor are disposed in an engine room, and In a hybrid vehicle having a water piping system on the side, a terminal for electrical connection of the motor is provided on the rear side of the engine, so even if water leaks from the water piping system on the front side of the engine, the motor The terminal can be prevented from getting wet as much as possible.

According to the second aspect of the present invention, in the first aspect,
In the invention described in the above, the terminal for electrically connecting the motor is disposed upward in the engine room, so that in addition to the effect of claim 1, there is leakage water flowing from the lower side to the rear of the engine. This also has the effect that the water does not wet the motor terminals.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of the engine room as viewed from obliquely above.

FIG. 2 is an explanatory diagram showing a configuration of a drive system of a hybrid vehicle.

FIG. 3 is a perspective view of the cylinder block as viewed from obliquely right front.

FIG. 4 is a perspective view of the cylinder block as viewed from obliquely right rear.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 engine 1 b cooling water inlet 2 motor / generator 2 a connection terminal 4 traveling motor 18 inverter 18 a connection terminal 19 inverter 19 a connection terminal 21 motor / drive system 22 radiator 23 water pipe A 24 cooling water pipe 25 cooling water pipe

Claims (2)

[Claims] 1. A hybrid vehicle having an engine and a motor that also serves as a generator or a generator and a running motor in an engine room, and having a water piping system in front of the engine. A hybrid vehicle, characterized in that a terminal for electrically connecting the motor is provided on the side. 2. A terminal for electrically connecting the motor,
The hybrid vehicle according to claim 1, wherein the hybrid vehicle is disposed upward in the engine room.