JPH0492725A - Control device for electric brake device - Google Patents

Abstract

PURPOSE:To promote warming up during the starting of an engine without generating noise by applying a brake load on a crank shaft by means of the rotary machine of an electric brake device during turning ON of a warming-up mode switch, and increasing a fuel injection amount. CONSTITUTION:When, after starting of an engine, a warming-up mode switch 36 is turned ON, an idle up signal is inputted to an actuator 45 by means of a command from a starting and warming-up control circuit 33, an idle ring lever 44 of a governor 43 is operated, and a fuel injection amount of an injection pump 42 is increased. Meanwhile, a brake signal is inputted to a brake and power generation control circuit 30, and the rotary magnetic field of the stator coil of a rotary machine 10 is controlled to a low speed. Rotation of a rotor part is suppressed, and a given brake load is electrically applied on a crank shaft together with a fly wheel. Thereby, though an engine is in an idling opera tion state during a stop, it is transferred from a no-load state to a load running state and the calorific value of an engine is increased, whereby warming up can be completed rapidly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electric braking device that is installed between the flywheel of a vehicle engine and its housing and performs braking action electrically, and is particularly suitable for use when the engine is cold. The present invention relates to a control device for an electric braking device for promoting warm-up during startup.

[Prior Art] Conventionally, as a braking device for a vehicle, an electric braking device using an eddy current system called a "retarder" is known. In other words, this "retarder" is a braking device that utilizes the tla force of electromagnetic induction. This structure electrically suppresses the rotation of the drive system (for example, see Japanese Patent Publication No. 198777/1983).

Generally, the kinetic energy during braking in an electric brake system with this structure is simply converted into thermal energy and released into the atmosphere. Attempts have been made to use them as generators and generators to convert kinetic energy during braking into electrical energy and recover it in a battery, and to use the recovered electrical energy to drive various auxiliary machines. As an example of this attempt, for example, as shown in Japanese Patent Application Laid-Open No. 60-757B3, a circuit is provided to supply current from a battery to the armature coil of an electric braking device, and the armature coil is supplied with v3 current to perform electric braking. One example is one in which the device is used as a starter motor to start the engine.

[Problems to be Solved by the Invention] However, since the configuration described in this publication only uses the electric braking device for the starter motor, after the engine has started, it is used as the original braking device when exiting the vehicle. However, the efficiency of using the electric braking device was extremely low.

For example, when warming up a diesel engine after starting it in cold weather, the engine rotational fluctuations are large, causing vibration and noise.The engine block is large and strong, so combined with the low cooling water temperature, the heat capacity is large, and therefore the warm-up time is also long. In this case, the warm-up promotion measure is to forcibly increase the fuel injection amount of the engine.
It is known to increase the idling speed,
This method results in considerable noise early in the morning, causing complaints.

SUMMARY OF THE INVENTION In view of these problems, an object of the present invention is to provide a device that can accelerate engine warm-up when starting an engine without making noise.

[Means for Solving the Problems] In order to achieve this object, the present invention includes a rotating machine attached to the flywheel of an engine crankshaft, and a battery and a resistor connected to the rotating machine via a braking/power generation control circuit. The connected electric braking device includes a warm-up mode switch, an actuator that increases the fuel injection amount, and a braking signal that outputs a braking signal to the braking/power generation control circuit when the warm-up mode switch is turned on, and an idle-up signal to the actuator. There is a starting/warming-up control circuit that outputs a
This invention proposes a control device for an electric braking device that includes a release determination circuit that turns FF.

[Function] According to the configuration of the present invention described above, when the warm-up mode switch is turned on after starting the engine in cold weather, a braking load is applied to the engine crankshaft by the rotating machine, and at the same time, the amount of fuel injection is increased. Even when the vehicle is idling while the vehicle is stopped, the operating state of the engine shifts from a no-load state to a pseudo-load operating state. In this way, warm-up is effectively promoted by using the electric braking device after the engine is started, and after warm-up, this load state is automatically released and the no-load state is restored.

[Example] Embodiments of the invention will now be described in detail with reference to the drawings.

FIG. 1 shows an engine ms,+ equipped with an electric braking device according to the present invention, and the engine 1 is, for example, a diesel engine. A flywheel housing 2 and a stator housing 3 are hermetically connected to the rear side of the engine 1 via a stator ring 4, and inside the flywheel housing 2 and stator housing 3,
A flywheel 6 fixed to the crankshaft of the engine 1 is housed. A clutch 7 is assembled to the flywheel 6, and this clutch 7 performs a speed change 111 via an input shaft 8.
9, and the high-speed power of the transmission 9 is transmitted to the drive wheels.

Flywheel housing 2 and stator housing 3
Inside, between the outer periphery of the flywheel 6 and the stator ring 4, there is a rotation 1i of the main part of the electric braking device.
o is configured. That is, a cylindrical stator core 11 made of a number of stacked thin steel plates is fitted into the stator ring 4,
A stator coil 12 wound with a thin conductive wire is inserted into the coil groove of the stator core 11 to form a stator portion 13. Further, a ring 15 is provided on the outer periphery of the flywheel 6.
At the same time, the rotor core 16 is fixed by the bolt 14 in a state close to and opposite to the inside of the stator core 11 , the cone-shaped rotor coil 17 is inserted into the coil groove of the stator core 11 , and the end rings 18 on both sides of the rotor coil 17 are fitted with retaining rings. 19 is fitted to form the rotor portion 2o. In other words, these stator section 13 and rotor section 2o
This constitutes a squirrel-cage bending machine that performs braking and power generation.

FIG. 2 is an electric circuit diagram of the electric braking device described above, in which the stator coil and rotor coil sides of the rotating machine 10 are connected to the battery 31 and other electrical components 32 through the braking/power generation control circuit 30.
Shows the state where the circuit is connected. Starting/warming up control circuit 33
A battery 34 is connected to its input terminal via a key switch 35, and a warm-up mode switch 36 is connected to its other input terminal. In addition, the input terminal of the release determination circuit 39 is
The accelerator switch 37 and the water temperature sensor 38, which detect accelerator depression, are connected, and therefore, when the accelerator pedal is depressed, or when the water temperature rises above the set value and enters the warm-up state, this release determination circuit 39 Can determine whether to cancel warm-up operation. This cancellation determination circuit 39
The output signal is output to an off means 40 that forcibly turns off the warm-up mode switch 36. The output signal of the starting/warming-up control circuit 33 is a command signal for applying starter current to the starter motor 41, or a braking signal to the braking/power generation control circuit 30, and is also used as an injection pump in the fuel supply system of a diesel engine. 42 has a governor 43
The governor 43 is provided with an idling lever 44 for keeping the idling rotation speed constant. An actuator 45 is attached to the idling lever 44 in a direction to increase the fuel injection I of the injection pump 42, and an idle up signal from the start/warm-up control circuit 33 is output to the actuator 45. .

In such a system, during idling operation after starting the engine, the engine crankshaft 5 is
For example, a braking load of 15 to 30 kg, ma is applied to the motor.

At this time, the idling speed is, for example, 500 to 800.
The fuel injection amount is set to increase so as to be balanced at jpm.

Next, control of the electric braking device of the illustrated embodiment will be explained.

When performing warm-up operation, by turning on the key switch 35, the starter motor 41 is driven by a command from the start-a warm-up control circuit 33, and the engine 1 is started. After starting the engine, when the warm-up mode switch 36 is turned on, an idle-up signal is manually applied to the actuator 45 according to a command from the start/warm-up control circuit 33, and the governor 43
The idling lever 44 of the injection pump 42 is operated.
The fuel injection amount is increased. On the other hand, a braking signal is manually applied from the starting/warming-up control circuit 33 to the braking/power generation control circuit 3o, the rotating magnetic field of the stator coil 12 of the rotating machine 1o is controlled at low speed, the rotation of the rotor part 2o is suppressed, and the flywheel A predetermined braking load is electrically applied to the crankshaft 5 together with the crankshaft 6. Therefore, even though the engine 1 is in idling operation while the vehicle is stopped, the engine 1 shifts from a no-load state to a loaded operating state, and is warmed up under this loaded operating condition. For example, when applying a braking load of 15 to 30 kg-m to the engine crankshaft 5, the fuel injection amount can be increased so that the idling speed is balanced at, for example, 500 to 600 rpm. The amount of heat generated increases, the engine is warmed up at a stable load rotation speed, and warm-up can be completed early.

Note that the power generated during this time is organized and charged to the battery 31, and excess power is dissipated as heat by the resistor 32.

After the engine has been sufficiently warmed up, when the temperature of the engine cooling water rises above the set value or when the accelerator is depressed for starting, a release signal from the release determination circuit 39 is sent to the off means 4o. The warm-up mode switch 36 is forcibly turned OFF. For this reason, the aforementioned idle up signal and control vJ signal are each cut,
Warm-up operation is canceled. Note that, of course, when the driver forcibly turns off the warm-up mode switch 36, the warm-up operation is also stopped in the same way.

In addition, when getting off the vehicle while driving, you can use the brake switch, etc.
When the control] signal is manually applied to the power generation control circuit 3o, the engine drive system is electrically braked by the rotating machine 10, and the electromotive force during this braking is rectified and stored in the battery 31. Nor.

[Effects of the Invention] As explained above, according to the present invention, the electric braking device installed on the flywheel side of the engine crankshaft is also used to promote warm-up for starting the engine. Effective effects will be improved.

Further, according to the present invention, after the engine is started, a load is automatically applied by the electric braking rotating machine and the fuel injection amount is increased 7 to perform load operation, so that warm-up in cold weather can be completed early.

In this case, the rotation of the engine can be maintained relatively low and is operated at a stable rotation speed, which reduces noise during warm-up operation and reduces noise complaints early in the morning.

Furthermore, in the present invention, the warm-up operation is automatically stopped when the accelerator is pressed or when the temperature of the engine cooling water reaches a certain temperature, so that unnecessarily warm-up operation is prevented. After warming up, the system immediately shifts to quiet no-load operation, which has the added effect of increasing the temperature.

[Brief explanation of the drawing]

FIG. 1 is a partially enlarged sectional view of an engine drive system in which an electric braking device according to the present invention is assembled, and FIG. 2 is an electric circuit diagram of a control device for the electric braking device. DESCRIPTION OF SYMBOLS 1... Engine, 5... Crankshaft, 6... Flywheel, 10... Rotating machine, 30... Braking/power generation control circuit, 31... Battery, 36... Warm-up mode Switch, 32...Resistor 33...Start/warm-up control circuit, 39...Cancellation determination circuit, 45...Actuator. Patent applicant Hino Motors Co., Ltd.

Claims (1)

[Claims] (1) In an electric braking system in which a rotating machine is attached to the flywheel of the engine crankshaft, and a battery and a load resistor are connected to the rotating machine via a braking/power generation control circuit, a warm-up mode switch and a fuel injection an actuator that increases the amount of fuel, a start/warm-up control circuit that outputs a braking signal to the braking/power generation control circuit and an idle-up signal to the actuator when the warm-up mode switch is turned on; 1. A control device for an electric braking device, comprising: a release determination circuit that turns off a warm-up mode switch when a warm-up mode is reached.