JPH05305824A - Car driver by regenerative retarder - Google Patents

Abstract

PURPOSE:To reduce energy loss at the time of driving a car by means of a retarder used with a motor mechanism directly connected to an engine. CONSTITUTION:When a retarder 2 attached to a flywheel 13 of an engine 1 is operated by a motor and wheels are driven its torque, an actuator 74 for a decompression valve of the stopped engine 1 is operated and the inside of a cylinder is opened, and any possible wasteful load due to compression is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle drive device using a regenerative retarder for driving a vehicle by utilizing an energy regeneration retarder mounted on a flywheel portion of an engine mounted on the vehicle.

[0002]

2. Description of the Related Art In a large vehicle, a retarder utilizing an electromagnetic mechanism is operated in addition to the main brake during deceleration or braking to apply a braking force to the vehicle.

This type of retarder is attached to the flywheel portion, converts the braking energy of the vehicle transmitted through the drive shaft into electric energy and stores it in a battery, etc., and at the time of starting the engine or engine torque. At the time of energization, an electric power from a battery is supplied to the retarder to electrically operate the retarder, and an attempt is made to effectively use the energy recovered during braking.

On the other hand, there is a proposal of using an internal combustion engine and two types of motor generators as a driving device for an automobile, and controlling connection and disconnection in accordance with the shaft outputs of them.
It is shown in the publication.

[0005]

When the retarder using the above-mentioned electromagnetic mechanism is electrically operated to start the vehicle,
In order to reduce the exhaust gas emission, it is better to stop the engine until the vehicle speed reaches a predetermined speed, but since the retarder and the engine are directly connected, it is useless to rotate the engine that compresses with a piston. The problem is that it requires a lot of energy.

Further, the drive device for an automobile disclosed in the official gazette is a drive device in consideration of fuel consumption and low pollution.
There is an inconvenience that the mechanism becomes complicated and the cost increases, such as providing two types of motor generators.

The present invention has been made in view of such a problem, and an object thereof is to regenerate a retarder for recovering braking energy by electrically regenerating a retarder for reducing a driving load by opening a cylinder of an engine. To provide a vehicle driving device.

[0008]

In order to achieve the above-mentioned object, according to the present invention, the vehicle is mounted on a flywheel portion of an engine to convert braking energy of the vehicle into electric power and to start the vehicle by electric actuation. In a vehicle drive device by a regenerative retarder using a power generation / electric mechanism, a decompression valve provided in a cylinder of the engine, and valve control means for controlling opening / closing of the decompression valve according to a vehicle speed and an operating state of the engine. There is provided a vehicle drive device using a regenerative retarder provided with.

[0009]

[Operation] A decompression valve for releasing the internal pressure is attached to the cylinder of the engine, and the decompression valve is opened while the electrically operated retarder is driving the vehicle according to the vehicle speed and the operating state of the engine, so that the engine is compressed. Since it does not exist, the load on the retarder is reduced.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the construction of an embodiment of a vehicle drive system using a regenerative retarder according to the present invention.
FIG. 2 is an explanatory view showing an example of the arrangement of the decompression valve in this embodiment.

First, in FIG. 1, 1 is an engine,
The wheels 53 are driven by the combustion energy of the fuel supplied from the injection pump 11 to drive the vehicle. The crankshaft 12 of the engine 1 is fitted with the flywheel 13 with the retarder 2 mounted, and its output shaft is It is connected to an input shaft of a clutch 3 that connects / disconnects engine torque.

Reference numeral 4 denotes a transmission which shifts the torque by, for example, a gear mechanism. A gear position sensor 41 for detecting a gear position and a vehicle speed sensor 42 for detecting a vehicle speed are attached, and the changed torque is propeller. It is transmitted to the wheels 53 via the shaft 51, the differential mechanism 52, and the like.

Reference numeral 14 is a throttle sensor provided in a lever portion of the injection pump 11, 15 is a fuel valve provided in a fuel flow path to the injection pump 11, 31 is a clutch pedal, and a clutch 3 is connected / disengaged. It is a clutch switch for detecting.

An example of the retarder 2 mounted on the flywheel 14 will now be described with reference to FIG. 3. The crankshaft 12 has claw-shaped magnetic poles 21 bent to the outer peripheral portion,
A rotor 20 is attached to which 22 is projected all around, and a plurality of sets of a coil 24 and a core 25, which are armatures 23 corresponding to the magnetic poles 21 and 22, are attached outside the rotor 20.
It is attached to the case 131 of the flywheel 13. Further, in the space 26 on the inner circumference of the magnetic poles 21 and 22, a winding 28 and a yoke 29 of an exciting portion 27 that magnetize the magnetic poles 21 and 22 so as to alternately have different poles are fixed to the case 131.

During braking of the vehicle, when the shaft of the rotor 20, that is, the crankshaft 12 is driven by the braking energy, the magnetic poles 21 and 22 of different polarities magnetized by the energization of the exciting portion 27 are connected to each other to form an armature. Therefore, an alternating magnetic field is induced in the armature 23, so that an electromotive force is generated in the armature 23, and the braking force is applied to the vehicle by using the electromotive force to charge the battery.

On the other hand, when the exciting portion 27 is energized and the armature 23 is supplied with AC power having a predetermined frequency to generate a moving magnetic field, the magnetic poles 21 and 2 magnetized by the exciting portion 27.
2 is rotated and electrically operated to generate torque in the rotor 20.

Next, in FIG. 2, reference numeral 6 is a cylinder, and a head portion 65 thereof has an intake port 6 provided with an intake valve 71.
1. A decompression port 63 equipped with a decompression valve 73 is provided outside the exhaust port 62 equipped with the exhaust valve 72. The flow path from the decompression port 63 is joined to the flow path from the exhaust port 62 to form an exhaust pipe. It is led to 64. Reference numeral 74 is an actuator for opening the decompression valve 73, which is configured to operate by, for example, fluid pressure, and operates according to a command from the controller 8 shown in FIG.

The controller 8 is composed of an electronic control unit, and its input circuit is connected with signals from the throttle sensor 14, the clutch switch 31, the gear position sensor 41 and the vehicle speed sensor 42, and a predetermined signal is supplied according to these signals. A determination is made so that a command for energizing the excitation unit 27 and the armature 23 of the retarder 2 connected to the output circuit and a predetermined command for the actuator 74, the fuel valve 15, etc. are issued.

FIG. 4 is a process flow chart showing an example of the operation of this embodiment, and the operation of this embodiment will be described with reference to this figure. First, at step 1, it is judged from the signal from the vehicle speed sensor 42 whether or not the vehicle is stopped, and if it is stopped, the routine proceeds to step 2 to stop the engine 1.

In the next step 3, the fuel valve 15 in the fuel passage to the injection pump 11 is closed and the actuator 74 is instructed to open the decompression valve 73.
Next, at step 4, it is judged from the signal from the gear position sensor 41 of the transmission 4 whether the transmission is shifted or not. Here, the clutch connection is checked by the signal of the clutch switch 31, and the depression of the accelerator is judged by the signal of the throttle sensor 14 in step 6. Then, in the case of no in these steps, the process returns to step 4, but in the case of each of the yes, the process proceeds to step 7.

In step 7, the throttle sensor 14
Depending on the accelerator depression amount by the
The armature 23 is energized, and the vehicle is driven by the electric actuation of the retarder 2. In this case, since the cylinder is opened by opening the decompression valve 73 in step 3 described above, the engine 1 can be easily rotated without the compression operation, the load for this is reduced, and the vehicle speed is increased. Then, when the vehicle speed is checked by the vehicle speed sensor 42 and the value is equal to or more than the set value, the process proceeds to the next step.

In step 9, the depression of the clutch pedal is checked by the signal of the clutch switch 31, and if there is no depression, the process returns to step 7, but if it is depressed, the process proceeds to step 10.

This is a procedure for disengaging the clutch after the vehicle reaches a predetermined speed to turn off the retarder and start the engine during coasting of the vehicle to smoothly switch the driving force of the vehicle. Retarder 2 in step 10
Turn off the power to the. Then, in the next step 11, the fuel is supplied to the engine 1 and the actuator 7
In step 12, the decompression valve 73 is closed, the retarder 2 is electrically operated to start the engine 1, and in step 13, the vehicle is driven by the torque of the started engine 1.

[0025]

According to the present invention as in the above embodiments,
Since the decompression valve that releases the compression of the cylinder is attached to the cylinder of the engine in addition to the intake and exhaust valves, when the vehicle is driven by electrically actuating the retarder using an electric mechanism, the decompression valve opens Since the compression is not performed, the load due to this is reduced and unnecessary energy is not consumed, so that the torque of the retarder is effectively utilized as the driving force of the vehicle.

Further, according to the present invention, the fuel supply is stopped when the cylinder is opened by the decompression valve.
There is an advantage that wasteful fuel consumption can be prevented, and troubles at the time of engine starting when switching from the electric drive of the retarder to the engine output are reduced.

[Brief description of drawings]

FIG. 1 is a configuration block diagram showing an embodiment of a vehicle drive device using a regenerative retarder according to the present invention.

FIG. 2 is an explanatory diagram showing an example of arrangement of decompression valves in the present embodiment.

FIG. 3 is a cross-sectional view showing an example of a retarder used in this embodiment.

FIG. 4 is a process flow chart showing an example of the operation of the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Engine 2 ... Retarder 3 ... Clutch 4 ... Transmission 8 ... Controller 13 ... Flywheel 41 ... Gear position sensor 42 ... Vehicle speed sensor 74 ... Actuator

[Procedure amendment]

[Submission date] July 17, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Change

[Correction content]

An example of the retarder 2 mounted on the flywheel 13 will now be described with reference to FIG.
The crankshaft 12 has a claw-shaped magnetic pole 2 bent to the outer peripheral portion.
A rotor 20 in which 1, 2 are projected over the entire circumference is attached, and a plurality of sets of a coil 24 and a core 25, which serve as an armature 23 corresponding to the magnetic poles 21 and 22, are provided outside the rotor 20. It is attached to the case 131. Further, in the space 26 on the inner circumference of the magnetic poles 21 and 22, a winding 28 and a yoke 29 of an exciting portion 27 that magnetize the magnetic poles 21 and 22 so as to alternately have different poles are fixed to the case 131.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Keiichi Nishioka 6-26-1, Minamioi, Shinagawa-ku, Tokyo Isuzu Motors Co., Ltd. (72) Masayuki Sano 3-25, Tonomachi, Kawasaki-ku, Kanagawa Prefecture No. 1 inside Kawasaki Factory of Isuzu Motors Limited

Claims (2)

[Claims] 1. A flywheel portion of an engine, which converts braking energy of a vehicle into electric power, and
In a vehicle drive device using a regenerative retarder that uses a power generation / electric mechanism for starting a vehicle by electric actuation, a decompression valve provided in a cylinder of the engine and opening / closing of the decompression valve according to a vehicle speed and an operating state of the engine. A vehicle drive device using a regenerative retarder, comprising: 2. The vehicle drive system according to claim 1, wherein fuel supply to the engine is stopped when the decompression valve is opened.