JP4059331B2 - Engine idle stop device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an engine idle operation stop device that automatically stops an engine idle operation based on a predetermined idle operation stop condition including an idle operation elapsed time, and in particular, sets a predetermined idle operation continuous operation time limit of a driver. It is related to the technology postponed by will.
[0002]
[Prior art]
For environmental measures such as exhaust gas and noise, and fuel efficiency improvement, the vehicle is temporarily stopped, for example, the engine idle operation stop while waiting for a signal, that is, the engine operation stop has already been manually operated and automatically stopped on a specific route bus. . Further, automatic idle operation stop and restart techniques are also disclosed. In Japanese Patent Application Laid-Open No. 6-257484, even when the engine water temperature is low, when the stop state is long, or when the vehicle stops for a predetermined time after the start of traveling. Engine operation is stopped. In Japanese Patent Laid-Open No. 9-60538, the black smoke accumulated by the exhaust brake operation at the time of automatic stop is prevented from being discharged at once at the time of automatic start. In Japanese Patent Laid-Open No. 9-60539, when the automatic stop / start condition of the engine is canceled halfway, recovery and backup that operate according to the new condition are performed promptly. Japanese Patent Laid-Open No. 9-60548 memorizes the number of automatic stop and start operations of the engine, turns on the maintenance lamp when the specified number of times is reached, and automatically stops and automatically when the specified number of times exceeds the specified number. The start function is stopped to prevent failure of loads such as starters.
[0003]
Performing the idling operation stop of the conventional engine as described above by the driver operation is effective because the stop start time can be freely selected, but the operation is troublesome. In addition, with the conventional automatic engine stop device, if the idle operation time is fixed to 5 minutes, for example, if there are many opportunities to start over 5 minutes, restarting each time is troublesome, especially for truck cars, where the operation route is constant. It is not preferable that the idle operation time is fixed under the driving conditions that do not.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of the above, and in an idle operation stop device for an engine that automatically stops the engine when a predetermined stop condition that does not hinder the stop is satisfied, an idle operation time period for automatically stopping the engine The purpose of the present invention is to provide an engine idle stop device that can be postponed each time at the driver's will.
[0005]
[Means for Solving the Problems]
According to the engine idle operation stop device of the present invention, the vehicle speed sensor (1) for detecting the vehicle speed, the engine rotation sensor (2) for detecting the engine rotation speed, and the neutral position sensor (for detecting the neutral position of the transmission). 3), a parking brake sensor (4) for detecting the ON / OFF state of the parking brake, and that the vehicle is stopped based on signals from these sensors (1 to 4), and the engine is in a predetermined idle state. Idle depending on whether or not the idle operation stop condition that can be satisfied if the four states of the rotation state, the transmission in the neutral position state, and the parking brake is applied is satisfied. Judgment of continuation / stop of operation and output to alarm device (7) and output to engine stop device (8) to automatically stop idling operation And a control device (6) for detecting the cabin tilt state in the engine idle operation stop device that automatically stops the idle operation of the engine based on the idle operation elapsed time and the idle operation stop condition. 5) is provided so that automatic stop of idle operation is not performed in the tilt state of the cabin, and a stop start postponing device (9) for postponing automatic stop of idle operation is provided to provide the control device (6) The controller (6) determines whether or not the conditions for stopping idle operation are satisfied based on the signals from the sensors (1 to 4) and satisfies the idle operation stop condition. If so, it is determined whether the predetermined idle time has elapsed in advance, and if the predetermined time has elapsed, it is output to the alarm device (7). If there is no postponement input from the stop start postponement device (9) within a predetermined time, it outputs to the engine stop device (8) to stop the idle operation, and the postponement input from the stop start postponement device (9) If there is, there is a function to perform control to stop the alarm device (7) and return to re-measurement of the idle operation elapsed time.
[0006]
According to the above invention, the vehicle speed sensor confirms the stop state, the engine rotation sensor confirms the idling operation, and the neutral position sensor confirms the idling operation together with the vehicle speed sensor. At the same time, it is confirmed that the vehicle has not started when the engine is restarted, and it is further confirmed that the parking brake sensor is on and the vehicle is stopped. The control device receives these sensor signals and stops the idle operation after a predetermined idle operation elapsed time based on the judgment information input in advance. If the driver wants to postpone the engine operation stop and avoid the trouble of restarting before stopping the operation, the idle operation is continued with the stop start delaying device. It should be noted that the idle operation is not stopped when the cabin is lifted (tilted) by the cabylt sensor for the purpose of inspection and maintenance of the engine.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the engine idle operation stop device detects, for example, a vehicle speed sensor 1 that detects the vehicle speed from the rotation speed of the propulsion shaft, and detects whether the engine is rotating or in idle operation. An arbitrary known engine rotation sensor 2 and a neutral position sensor 3 that detects whether the vehicle is in a state where the vehicle cannot be driven are detected at a neutral position of the transmission so as to transmit to the control device 6. In addition, a parking brake sensor 4 that detects whether the vehicle is in a parking state and a cabylt sensor that detects a cabin lift (tilt) state for engine inspection and maintenance are connected to transmit to the control device 6. In the cabin tilt state, the engine is configured so as not to stop idling during inspection and maintenance around the engine.
[0008]
The control device 6 includes a computer. Based on the signals from these sensors and pre-input conditions, the controller 6 determines whether or not the idling operation is continued when the vehicle is stopped, issues a stop alarm, and automatically stops the idling operation. I do.
[0009]
The engine stop alarm device 7 connected to the control device 6 is constituted by a buzzer. If the engine stop device 8 is a diesel engine, the engine stop alarm device 7 is configured to perform fuel injection cut by operating a fuel injection lever.
[0010]
Further, the postponement button 9 which is a stop start postponing device is for postponing the idling operation stop alarm so as not to stop, and is connected to the control device 6 so that the driver operates.
[0011]
The operation of the engine idling stop apparatus having the above-described configuration will be described with reference to the flowchart shown in FIG.
[0012]
In step S1, the timer is set to 0 so as to be a reference for the passage of time after engine start.
In step S2, it is determined whether or not conditions for stopping idle operation are satisfied. That is, the vehicle speed sensor 1 confirms that the vehicle is stopped, the engine rotation sensor 2 confirms that the vehicle is idling at a predetermined value of, for example, 800 rpm or less, the TM is in a neutral position, and the safety state is confirmed when the engine is restarted. Confirm that the engine is in idle operation by checking whether the brake is applied. Further, it is determined whether or not the idle operation elapsed time satisfies a condition that a predetermined time, for example, 5 minutes previously input to the control device 6 has elapsed. If these conditions are satisfied, the process goes to step S3. If not, the process returns to step S1.
[0013]
In step S3, an engine stop alarm is issued for a time for issuing an alarm for stopping the idle operation, for example, 20 seconds before the idle operation of 5 minutes. It is determined whether or not this alarm time has been reached. If the alarm time is reached, the process goes to step S4. If it is less than the alarm time, the process returns to step S2.
In step S4, an idle operation stop alarm is given by, for example, a buzzer.
In step S5, it is determined whether to stop the operation at a predetermined idle operation elapsed time or to continue the postponement of the idle operation based on the situation determination of the driver. When the postponement button 9 for continuously postponing idle operation is ON, the process goes to step S6 to cancel the alarm. If not postponed, go to step S7.
[0014]
In step S7, the idle operation elapsed time is confirmed. If the elapsed time is less than 5 minutes, for example, the process returns to step S2. If 5 minutes have passed, the process goes to step S8 to stop the idling operation, that is, stop the engine operation and end the flow. And it waits for engine restart.
[0015]
【The invention's effect】
The effects of the present invention are listed below.
(1) Since a stop start postponing device that postpones the start of operation stop is connected to a control device that controls the continuation / stop of idle operation, the driver operates the stop start postponement device as necessary according to the operation stop alarm and stops operation. Can be postponed, so it is effective in a state of restarting immediately after the operation is stopped. As a result, frequent engine stop and start such as in a traffic jam can be avoided to reduce the load on the starter and reduce driver stress.
(2) The postponement of the idle operation stop by the operation start postponement device is performed by the driver according to the traveling state, so that the optimum operation stop can be achieved.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an engine idle operation stop device according to an embodiment of the present invention.
FIG. 2 is a flowchart for explaining the operation of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Vehicle speed sensor 2 ... Engine rotation sensor 3 ... Neutral position sensor 4 ... Parking brake sensor 5 ... Cabbutyl sensor 6 ... Control device 7 ... Engine stop warning device 8 ...・ Engine stop device 9 ... Postponement button

Claims (1)

A vehicle speed sensor (1) that detects the vehicle speed, an engine rotation sensor (2) that detects the engine speed, a neutral position sensor (3) that detects the neutral position of the transmission, and an ON / OFF state of the parking brake. The parking brake sensor (4) to be operated and signals from these sensors (1 to 4) indicate that the vehicle is stopped, the engine is in a predetermined idle rotation state, and the transmission is in a neutral position state. And whether the parking brake is applied or not, whether the idle operation is continued or stopped is determined by whether or not the idle operation stop condition that is satisfied is satisfied. ) And a control device (6) for automatically stopping the idle operation by outputting to the engine stop device (8). In the engine idle operation stop device that automatically stops the engine idle operation based on the idle operation stop condition, a cabylt sensor (5) that detects the tilt state of the cabin is provided, and the idle operation is automatically stopped in the cabin tilt state. A stop start postponing device (9) for delaying the automatic stop of idle operation is provided and connected to the control device (6), and the control device (6) is connected to each sensor (1 Based on the signal from ~ 4), it is determined whether or not the condition for stopping the idle operation is satisfied. If the idle operation stop condition is satisfied, the idle operation elapsed time has passed a predetermined time that has been input in advance. If the predetermined time has elapsed, it is output to the alarm device (7), and further, the predetermined time is postponed from the stop start postponing device (9). When there is no input, it outputs to the engine stop device (8) to stop idle operation, and when there is a postponement input from the stop start postponement device (9), the alarm device (7) is stopped to idle. An engine idle stop device having a function of returning to re-measurement of an elapsed operation time.

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