JPH0440979Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an accelerator pedal position sensor for speed change control used to electrically control a transmission transmission.

[Conventional technology]

Generally, the shift schedule of a system that electrically controls a transmission is typically determined based on the vehicle speed and the position of the accelerator pedal, as shown in FIG. In order to detect the position of the accelerator pedal in this case, a variable resistor 1 driven by the accelerator pedal is normally used, as shown in FIG.
The power supply voltage (for example, 5V) is applied to one terminal A, the other terminal C is grounded, and the voltage corresponding to the accelerator pedal position is extracted from the intermediate output terminal B. The output voltage from the output terminal B is input to the speed change control device 2, and the transmission control device 2 is configured to control the transmission according to a shift schedule.

[Problem that the invention attempts to solve]

By the way, in the shift schedule for such speed change control, the shift schedule for fuel-saving driving is set to use the engine's low rotation range more often, so when the remaining capacity of the battery becomes small, If the vehicle continues to be operated on a fuel-saving shift schedule, the amount of power generated by the generator will be small due to the low rotation of the engine, resulting in a small amount of charging to the battery, which will shorten the life of the battery.

The present invention was devised to solve the above-mentioned problems in the conventional speed change control device using a fuel-saving driving shift schedule. An object of the present invention is to provide an accelerator pedal position sensor for speed change control that is capable of sufficiently charging the battery and preventing damage to the battery.

[Means and actions for solving problems]

The present invention connects a correction resistor and a switch in parallel to a variable resistor for detecting the position of the accelerator pedal, and when the sensor for detecting remaining battery capacity detects a decrease in the remaining battery capacity, the accelerator pedal for gear shift control closes the switch. A pedal position sensor was constructed.

By using the accelerator pedal position sensor configured in this way, when the remaining battery capacity decreases, the correction resistor is connected to the variable resistor for detecting the accelerator pedal position by the sensor for detecting the remaining battery capacity, thereby reducing the variable resistance. Increase the output voltage of the resistor to create a state that is apparently the same as shifting the accelerator pedal position to the full side. This increases the amount of charge and makes it possible to prevent damage to the battery.

〔Example〕

Examples will be described below. FIG. 1 is a circuit diagram of an embodiment of an accelerator pedal position sensor for speed change control according to the present invention. In the figure, reference numeral 1 denotes a variable resistor for detecting the position of the accelerator pedal, which has the same structure as a conventional one. A correction resistor 5 is connected between terminals A and B of the variable resistor 1 via a reed switch 4 of a sensor 3 for detecting remaining battery capacity. Further, a capacitor 6 is connected in parallel to the reed switch 4, and this capacitor 6 is used to alleviate the effects of instantaneous malfunction due to vibration while the reed switch 4 is running.

As shown in FIG. 2, the battery remaining capacity detection sensor 3 includes a non-magnetic bottomed cylindrical container 7 made of glass or the like, and the reed switch 4 is attached to the bottom of the container 7.
are placed. Flange-like stoppers 7a and 7b are formed at the middle and lower end of the outer periphery of the non-magnetic container 7, and an annular magnetic float 8 is loosely fitted around the outer periphery of the container 7 between the stoppers 7a and 7b. It is arranged so that it can be moved up and down.

When the battery remaining capacity detection sensor 3 is placed in the battery liquid 9 in the battery, if the battery remaining capacity is large and the specific gravity of the battery liquid 9 is large, the float 8 will float, and the remaining battery capacity will decrease. The specific gravity is set so that when the specific gravity of the battery liquid decreases below a predetermined value, it sinks.

Next, we will explain the operation of the access pedal position sensor configured as described above. First, when the remaining battery capacity is large, the float 8 of the battery remaining capacity detection sensor 3 floats up, and the reed switch 4 is turned off. It's summery. Therefore, in this case, the correction resistor 5 is not connected to the variable resistor 1 for detecting the position of the accelerator pedal, and the output voltage as shown by the solid line a in FIG. It is output from output terminal B. The output voltage is then input to the speed change control device 2, and speed change control is performed according to a predetermined shift schedule.

Next, when the remaining battery capacity falls below a predetermined value during driving, the magnetic float 8 of the battery remaining capacity detection sensor 3 sinks as the specific gravity of the battery liquid 9 decreases, and the reed switch 4 is turned on. The switch is turned ON, and the correction resistor 5 is connected to terminals A and B of the variable resistor 1 for detecting the position of the accelerator pedal. In this way, terminal A of variable resistor 1,
When the correction resistor 5 is connected in parallel between terminals A and B,
The resistance across terminal B decreases, the output voltage from terminal B increases, and the variable resistor output characteristic switches to battery charging mode, as shown by the dotted line b in FIG.
That is, a voltage corresponding to a state in which the accelerator pedal is apparently depressed in the full direction, which is deeper than the actual position, is output.

Therefore, with this corrected battery charging mode output voltage, the transmission control device 2 controls the transmission so as to utilize the high speed rotation range rather than the actual accelerator pedal position, thereby increasing the battery charging mode. The amount of charge increases and the remaining capacity of the battery is restored.

When the battery remaining capacity recovers to a predetermined value and the specific gravity of the battery liquid 9 increases, the magnetic float 8
rises again and reed switch 4 turns OFF,
The output characteristic of the variable resistor 1 is switched from the battery charging mode to the normal output mode, and speed change control is performed in accordance with a predetermined shift schedule.

[Effect of idea]

According to the present invention, a correction resistor whose connection is controlled by a sensor for detecting remaining battery capacity is provided for the variable resistor for detecting the position of the accelerator pedal, so when the remaining capacity of the battery decreases, the accelerator pedal position The sensor is automatically switched to battery charging mode and the battery charge is increased. Therefore, even when a fuel-saving driving shift schedule is used, damage to the battery due to low rotation can be prevented, and furthermore, the occurrence of an inability to start can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a circuit configuration diagram of an embodiment of the accelerator pedal position sensor for speed change control according to the present invention, Fig. 2 is a schematic cross-sectional view of a sensor for detecting remaining battery capacity, and Fig. 3 is a circuit diagram for detecting the accelerator pedal position. 4 is a diagram showing a general shift control schedule, and FIG. 5 is a circuit configuration diagram of a conventional accelerator pedal position sensor. In the figure, 1 is a variable resistor for detecting the position of the accelerator pedal, 2 is a speed change control device, 3 is a sensor for detecting remaining battery capacity, 4 is a reed switch, 5 is a correction resistor, 6 is a relaxation capacitor, 7 is a non-magnetic container,
8 is a magnetic float, and 9 is a battery liquid.

Claims (1)

[Scope of utility model registration request] A speed change characterized in that a correction resistor and a switch are connected in parallel to a variable resistor for detecting an accelerator pedal position, and the switch is closed when a sensor for detecting remaining battery capacity detects a decrease in remaining capacity. Control accelerator pedal position sensor.