JPH05524U - Automatic constant speed device - Google Patents

Abstract

(57) [Summary] [Purpose] Each supply is operated as a dedicated part by operating the supply valve for large operation at initialization and the vacuum control pump for minute operation at tap-up. As a miniaturization. [Structure] A supply valve 6 corresponding to a power supply for initialization from a controller 10 for introducing a negative pressure of an engine 200 to output-drive an actuator 2, and a negative pressure corresponding to a power supply for tap-up from a controller 10. The automatic constant-speed traveling device 1 is provided with a vacuum control pump 7 that generates an output and drives the actuator 2 to output.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an automatic constant-speed traveling device used for automatically controlling the traveling speed of an automobile to a certain set value, for example.

[0002]

[Prior Art]

 Conventionally, as the above-mentioned automatic constant speed traveling device, for example, there has been one shown in FIGS. 3 and 4 (a), (b).

That is, in the illustrated automatic constant-speed traveling device 100, an output member 101a provided in an actuator 101 is connected to a throttle valve 150 via a throttle wire 151, and the output member 101a and the output member 101a are connected to each other. A return spring 101e is provided in a negative pressure chamber 101d formed by the attached diaphragm 101b and actuator casing 101c.

The output member 101a is biased to the right side in FIG. 3 by the elastic repulsive force of the return spring 101e, and the actuator casing 101c communicates with the negative pressure chamber 101d. The connection pipe 102 is connected.

One end of a supply valve 103, an air control valve 104, and a release valve 105 are connected to the connection pipe 102. The other end of the supply valve 103 is connected to the intake manifold of the engine 200. When the supply valve 103 is open, the negative pressure from the engine 200 is introduced into the negative pressure chamber 101d through the connecting pipe 102.

Further, the other ends of the air control valve 104 and the release valve 105 are opened to the atmosphere, and the atmosphere is connected to the connecting pipe when the air control valve 104 or the release valve 105 is in an open state. It is introduced into the negative pressure chamber 101d via 102.

Further, a controller 106 is connected to the coils 103 a, 104 a, 105 a provided in the sub valve 103, the air control valve 104, and the release valve 105.

Therefore, when performing initial control (initialization) when controlling the vehicle to the set vehicle speed, the power supply time to the supply valve 103 is calculated based on the set vehicle speed input by the controller 106.

Then, the air control valve 104 and the release valve 105 are controlled to be in a closed state, and power is supplied to the supply valve 103 at the calculated time.

As a result, as shown in FIGS. 4A and 4B, the supply valve 103 is opened in a relatively long time t1 to introduce the supply valve 103 into the negative pressure chamber 101 d of the engine 200. ..

Since the negative pressure is introduced into the negative pressure chamber 101d, the pressure in the negative pressure chamber 101d is reduced. Therefore, the output member 101a corresponds to the time t1 against the elastic reaction force of the return spring 101e. Is moved to the left side from the initial position in FIG.

By moving the output member 101a to the left side in FIG. 3, the throttle valve 150 is operated to the open side via the throttle cable 151 to move the vehicle to the throttle position corresponding to the set vehicle speed. ..

After the time t1, the supply of power from the controller 106 to the supply valve 103 is stopped and the supply valve 103 is closed. Therefore, the output member 101a of the actuator 101 is moved to the left side in FIG. Hold at the position moved to the side, and let the vehicle run at a constant speed at the set speed.

Further, when constant speed control for slightly increasing the vehicle speed (hereinafter referred to as tap-up) is performed while the vehicle is traveling at a constant speed, the controller 106 performs the same operation as described above based on the input corrected vehicle speed data. It is calculated in the power supply time to the supply valve 103.

Then, as shown in FIG. 4B, the supply valve 103 is opened for a short time t2, the negative pressure of the engine 200 is introduced into the negative pressure chamber 101d, and the output member 101a of the actuator 101 is opened. In step 3, the vehicle is moved further to the left of the above-mentioned position and held, and the vehicle is driven at a constant speed at an increased speed.

[0016]

[Problems to be solved by the device]

 However, in the above-described conventional automatic constant speed traveling device 100, the initialization and the tap-up are both performed by switching the supply valve 103 from the closed state to the open state, so that a rough operation for initialization is performed. A supply valve 103 capable of performing a fine operation for tap-up is required. In order to perform both a coarse operation and a fine operation, the supply valve 103 is operated at a high speed in a closed / open state. In order to perform high speed operation, the coil 103a must be large in size, which causes the supply valve 103 to be large in size and provides a space for mounting the automatic constant speed traveling device 100 on the vehicle body. There was a problem of increasing the number, and it was an issue to solve this problem.

Therefore, the present invention has been made in view of the above-described conventional problems, and an object thereof is to provide an automatic constant-speed traveling device which is compact without increasing the size of the supply valve.

[0018]

[Means for Solving the Problems]

 An automatic constant speed traveling device according to the present invention is connected to an actuator connected to a throttle valve of an engine and a negative pressure chamber of the actuator so as to introduce a negative pressure of the engine by supplying power. It is connected to the supply valve that drives the actuator for output corresponding to the initialization, and is connected to the negative pressure chamber of the actuator to generate negative pressure when power is supplied. A vacuum control pump that is connected to the negative pressure chamber of the actuator, and an air control valve and a release valve that drive the actuator back by introducing air by shutting off the power supply, the supply valve, and a vacuum control. Pump, air control valve, release Lube to have been characterized by being configured to include a controller for supplying a predetermined power, the configuration of an automatic constant speed running apparatus described above is obtained by a means for solving the conventional problems.

The automatic constant-speed traveling device according to the present invention corresponds to the power supply for initialization from the controller, introduces the negative pressure of the engine with the supply valve to drive the actuator, and drives the actuator for tap-up. In response to power supply, the vacuum control pump generates negative pressure to drive the actuator output, so it is not necessary to operate the supply valve for both initialization and tap-up, as compared to the conventional example. ..

[0020]

【Example】

 An automatic constant speed traveling device according to an embodiment of the present invention will be described below with reference to FIGS. 1 and 2A and 2B.

That is, in the illustrated automatic constant speed traveling device 1, a throttle valve 4 is connected to an output member 2a provided in a diaphragm actuator 2 via a throttle cable 3, and the output member 2a and this output member 2a are connected to each other. A return spring 2e for returning the output member 2a is housed in a negative pressure chamber 2d formed by a diaphragm 2b attached to 2a and an actuator casing 2c.

The output member 2a is urged to the right side in FIG. 1 by the elastic repulsive force of the return spring 2e, and the actuator casing 2c communicates with the negative pressure chamber 2d. A connecting pipe 5 is connected.

In the connection pipe 5, a supply valve connecting portion 5a, a vacuum control pump connecting portion 5b, an air control valve connecting portion 5c, and a release valve connecting portion 5d are connected to the negative pressure chamber 2d. An engine negative pressure outlet 6a provided on one end side of the supply valve 6 is connected to the supply valve connecting portion 5a, and an engine connection provided on the other end side of the supply valve 6 is provided. An intake manifold of the engine 200 is communicatively connected to the port 6b.

Further, the vacuum control pump connecting portion 5b is connected to a vacuum outlet 7b which is in communication with a vacuum chamber 7a formed in the vacuum control pump 7.

Here, in the vacuum control pump 7, a pump motor 7e is connected to a movable member 7d provided in the vacuum chamber 7a via a crank mechanism 7f, and by operating the pump motor 7e, The pressure in the vacuum chamber 7a is reduced.

Further, the air control valve connection portion 5c and the release valve connection portion 5d are connected to the air introduction ports 8a and 9a provided at one end sides of the air control valve 8 and the release valve 9, respectively, to communicate with each other. Atmosphere inlets 8b and 9b provided at the other ends of the control valve 8 and the release valve 9 are open to the atmosphere.

A coil 6c included in the supply valve 6, a pump motor 7e included in the vacuum control pump 7, a coil 8c included in the air control valve 8, and a coil included in the release valve 9 9c is connected to the controller 10.

Further, a command signal from the switch 11 for issuing a command for constant speed traveling is input to the controller 10 via the I / O interface circuit, and the vehicle speed sensor 12 causes the vehicle speed proportional to the actual vehicle speed. A microcomputer for inputting data is built in, and in response to the operation of the switch 11, the coil 6c of the supply valve 6, the pump motor 7e of the vacuum control pump 7, the coil 8c of the air conditioner control valve 8 and the release. The valve 9 is controlled and driven.

Further, when power is supplied to the coil 6c of the supply valve 6, the coil 6c is excited to open the supply valve 6, and when power is supplied to the vacuum control pump motor 7e, When the pump 7 is operated and power is supplied to the coil 8c of the air control valve 8 and the coil 9c of the release valve, the coils 8c and 9c are excited to close the air control valve 8 and the release valve 9. State.

Therefore, when controlling the vehicle at the set vehicle speed, the main power is supplied to the controller 10 by turning on the switch 11, and by setting the switch 11, the vehicle speed sensor 12 is operated. Based on the vehicle speed data, the controller 10 calculates the operating time of the supply valve from the set vehicle speed and outputs the power supply output.

At this time, as shown in FIG. 2A, when a long t3 time for initializing is set, the controller 10 supplies power to the coil 6c of the supply valve 6 in the above t3 time.

When the coil 6c of the supply valve 6 is supplied with power for t3 hours, the supply valve 6 is opened, the negative pressure of the engine 200 is introduced into the connecting pipe 5, and the negative pressure chamber 2d of the actuator 2 is introduced. Reduce the pressure of.

The pressure in the negative pressure chamber 2d of the actuator 2 is reduced to resist the elastic repulsive force of the return spring 2e, and the output member 2a is moved from the initial position in FIG. 1 corresponding to the time t3. Move to position A on the left side.

When the output member 2a moves to the position A in FIG. 1, the throttle valve 4 is operated to the open side through the throttle cable 3 to move the vehicle to the throttle position corresponding to the set vehicle speed.

Then, after the time t3, the supply of power from the controller 10 to the coil 6c of the supply valve 6 is stopped and the supply valve 6 is closed, so that the output member 2a of the actuator 2 is set to the state shown in FIG. Hold the vehicle in position A and run the vehicle at a set speed.

Further, as shown in FIG. 2B, when the controller 10 sets a short t4 time for performing constant speed control (tap-up) for slightly increasing the vehicle speed while the vehicle is traveling at a constant speed, Power is supplied to the pump motor 7e of the vacuum control pump 7 for the time t4 based on the corrected vehicle speed data input by 10.

When power is supplied to the vacuum control pump 7, the pump motor 7e starts to operate and the pressure in the vacuum chamber 7a is reduced.

As the pressure in the vacuum chamber 7a decreases, the pressure in the negative pressure chamber 2d of the actuator 2 decreases via the connecting pipe 5.

As the pressure in the negative pressure chamber 2d of the actuator 2 decreases, the output member 2a is moved from the position A to the position A in FIG. 1 against the elastic repulsive force of the return spring 2e 1. In, further moved to the B position on the left side.

By moving the output member 2a from the A position to the B position, the throttle valve 4 is actuated slightly to the open side from the opening through the throttle cable 3, so that the vehicle is increased by the tap-up. Run at a constant speed at the increased speed.

When the switch 11 is turned off, the controller 10 shuts off the power source of the air control valve 8 and the release valve 9 to open them.

The air is introduced into the negative pressure chamber 2d of the actuator 2 by opening the air control valve 8 or the release valve 9, so that the output member 2a is returned to the return position by the elastic restoring force of the return spring 2e. By returning and returning the throttle valve 4 to the initial position, the constant speed traveling control is ended.

During this time, since the supply valve 6 is used for the initialization of the constant speed traveling and the vacuum control pump 7 is used for the tap-up, the supply valve 6 is used for controlling a relatively large negative pressure from the engine 200. , Vacuum control The pump 7 is separately controlled for controlling a relatively small negative pressure.

[0044]

[Effect of the device]

 As described above, since the automatic constant speed traveling device according to the present invention has the above-mentioned configuration, by operating the supply valve only at the time of initialization, the supply valve does not become large in size. This makes it compact and has the excellent effect of reducing the mounting space on the vehicle body.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view of an automatic constant speed traveling device according to an embodiment of the present invention.

2 (a) and 2 (b) are time charts at the time of initialization and tap-up, respectively, in the automatic constant speed traveling device shown in FIG.

FIG. 3 is a schematic view of a conventional automatic constant speed traveling device.

4 (a) and 4 (b) are time charts at the time of initialization and tap-up, respectively, in a conventional automatic constant speed traveling device.

[Explanation of symbols]

 1 Automatic constant speed traveling device 2 Actuator 2d Negative pressure chamber 4 Throttle valve 6 Supply valve 7 Vacuum control pump 8 Air control valve 9 Release valve 10 Controller 50 Power supply 200 Engine

Claims (1)

Claims for utility model registration: 1. An actuator connected to a throttle valve of an engine and a negative pressure chamber of the actuator are communicatively connected, and a negative pressure of the engine is introduced by supplying power. A supply valve that drives the actuator to output in response to initialization and a negative pressure chamber of the actuator are connected in communication, generate negative pressure when power is supplied, and drive the actuator to output in response to tap-up. And a vacuum control pump, which is connected to the negative pressure chamber of the actuator and communicates with the negative pressure chamber of the actuator to introduce air to drive the actuator back, and the supply valve and the vacuum control pump. ， Air control valve ， Release bar Automatic constant speed running apparatus comprising the controller supplies a predetermined power to the drive.