JP2007211713A - Abnormality notifying device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To appropriately notify oil pressure abnormality in an idle stop vehicle equipped with an engine and a mechanical oil pump. <P>SOLUTION: An idle stop ECU executes a program including a step for lighting an oil pressure alarm lamp when idle stop conditions are satisfied and a hydraulic switch is on, a step for cutting fuel and executing idle stop, a step for calculating an idle stop continuing time (it) when restart conditions are satisfied, a step for calculating a mask time (mt) after full explosion based on the (it), a step for lighting the oil pressure warning lamp if the hydraulic switch is on after full explosion of the engine and after elapsing (mt) and a step for switching off the hydraulic lamp if the hydraulic switch is not on. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an abnormality notification device in a vehicle that temporarily stops an engine when a predetermined condition is satisfied during idling, and more particularly to a device that notifies a driver of an abnormality in hydraulic pressure supplied by an oil pump.

  From the viewpoint of global warming prevention and resource saving, when the vehicle stops at a red light at an intersection, etc., the engine is automatically stopped and the driver operates to start again (for example, by depressing the accelerator pedal) Also, it is also called an idling stop system (economy running system, engine automatic stop and start system) that restarts the engine when the brake pedal is depressed or the shift lever is switched to the forward travel position. It may be described as idle stop system or idle stop control). In this system, when the engine is restarted, the crankshaft is rotated by an electric motor such as a motor generator or a starter motor using the power of the secondary battery mounted on the vehicle to restart the engine.

  In such an idle stop system, various sensor signals and switch signals are detected, and control is performed to stop the engine and restart the engine again when a predetermined idle stop start condition is satisfied. There is a need.

  On the other hand, a vehicle equipped with an engine including such an idle stop vehicle includes an oil pump driven by the engine. The drive shaft of the oil pump is connected to the crankshaft via a belt and a pulley, and when the engine is operating (the crankshaft is rotating), the mechanical oil pump is operated to ensure a desired hydraulic pressure. When this oil pressure decreases, engine oil that cools or lubricates the engine is not circulated, and problems such as overheating of the engine may occur. For this reason, a vehicle equipped with an engine (not limited to an idle stop vehicle) is usually provided with an oil pressure warning light for engine oil.

  Regarding such a vehicle, Japanese Patent Laid-Open No. 2003-336514 (Patent Document 1) discloses a method of controlling a low oil pressure indicator of an engine in a hybrid vehicle having a power train having an engine and an electric propulsion motor. The method includes the steps of detecting engine oil pressure, detecting engine speed, inputting an oil pressure detection value and an engine speed detection value to a controller, and connecting a low oil pressure indicator to the controller. , Displaying the vehicle mode for “off” and “run / start”, and preventing the operation of the low oil pressure indicator when the mode display is “run / start” mode and the engine is not running, including.

According to this method, when the idle stop vehicle is temporarily not operating the engine, the operation of the low oil pressure indicator is hindered so that the oil pressure warning light does not light even at low oil pressure.
JP 2003-336514 A

  However, the method disclosed in Patent Document 1 merely prevents the hydraulic warning light from being displayed when the engine is temporarily stopped, and causes the following problems that give the driver a sense of incongruity.

  (1) If the idle stop time is long (especially on an uphill road), it takes time to increase to the desired oil pressure even if the oil pump is activated after returning from idle stop (engine restarts). . For this reason, even after no abnormality has occurred in the hydraulic system, after returning from the idle stop (assuming that the oil pump has stopped due to the idle stop and the hydraulic pressure has decreased), the engine is restarted. The hydraulic warning light is lit every time the engine is started.

  (2) When the engine before the idling stop is operating, if the idling stop is performed while the oil pressure drops and the oil pressure warning light is lit, the engine stops and the operation of the low oil pressure indicator is hindered. It is done. For this reason, the hydraulic pressure warning light is extinguished during the idling stop despite the occurrence of an abnormality in the hydraulic system.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to accurately notify abnormality of hydraulic pressure in a vehicle such as an idle stop vehicle that repeatedly stops and restarts an engine. It is to provide a vehicle abnormality notification device.

  The vehicle abnormality notification device according to the first aspect of the present invention notifies the abnormality in the vehicle that temporarily stops the engine when the vehicle condition satisfies a predetermined condition. This vehicle is provided with a hydraulic mechanism including a pump that is stopped when the engine is temporarily stopped and is activated when the engine is restarted. The abnormality notification device is configured to detect a malfunction of the hydraulic mechanism, a calculation unit to calculate a detection delay time according to a temporary stop time, and an operation when an abnormality is detected by the detection unit. Informing means for notifying the person of abnormality, and in the case of restarting after temporarily stopping the engine, including prohibiting means for prohibiting abnormality notice by the notifying means until the detection delay time elapses. .

  According to the first invention, when the state of the vehicle satisfies a predetermined condition, the engine is temporarily stopped and the pump of the hydraulic mechanism is stopped. For this reason, the hydraulic pressure in the hydraulic mechanism supplied by the mechanical pump or the electric pump decreases. The longer this temporary stop time, the longer it takes to return the hydraulic pressure in the hydraulic mechanism to a normal pressure. For this reason, immediately after the engine is restarted from a temporary stop, the hydraulic pressure is not sufficiently increased by the operated pump. In such a case, if the driver is informed of the result of the abnormality detected by the detection means, the abnormality is notified each time the vehicle is restarted. The prohibition means is after the engine is restarted from the temporary stop until the detection delay time calculated according to the temporary stop time elapses (when the hydraulic mechanism is normal, the engine is restarted). Even if an abnormality of the hydraulic mechanism is detected, notification to the driver is prohibited until the time until the hydraulic pressure is sufficiently increased by the pump that starts the operation by the start has elapsed. As a result, it is possible to provide a vehicle abnormality notification device capable of accurately reporting a hydraulic pressure abnormality in a vehicle such as an idle stop vehicle that repeatedly stops and restarts the engine.

  In addition to the configuration of the first invention, the abnormality notification device according to the second invention cancels the prohibition of abnormality notification by the prohibiting means when an abnormality of the hydraulic mechanism is detected before the engine is temporarily stopped. Means for further comprising:

  According to the second invention, when it is detected that the hydraulic mechanism is abnormal before the engine is temporarily stopped, the abnormality is notified even during the temporary stop, even before the detection delay time elapses from the restart. Immediately notify the driver of the abnormality. As a result, it is possible to promptly notify that an abnormality has occurred in the hydraulic mechanism due to a factor that is not due to a temporary stop of the engine.

  In the abnormality notification device according to the third invention, in addition to the configuration of the first or second invention, the calculation means calculates the detection delay time based on the temporary stop time and a predetermined map. Means for.

  According to the third aspect of the present invention, the time when the engine restarts and the mechanical pump or the electric pump starts operating and the hydraulic pressure of the hydraulic mechanism rises to a normal pressure is used as a parameter with the temporary stop time as a parameter. Remember it. Based on this map, the detection delay time can be calculated in correspondence with the temporary stop time.

  In the abnormality notification device according to the fourth aspect of the invention, in addition to the configuration of the first or second aspect of the invention, the calculation means includes means for calculating the detection delay time so that the longer the temporary stop time, the longer the detection delay time. Including.

  According to the fourth aspect of the invention, the longer the temporary stop time, the lower the hydraulic pressure of the hydraulic mechanism. For this reason, if the detection delay time is made longer as the temporary stop time is longer, an abnormality in the hydraulic mechanism can be detected after the hydraulic pressure of the hydraulic mechanism returns to a normal state after the temporary engine stop. Can avoid false detection.

  In the abnormality notification device according to the fifth invention, in addition to the configuration of the third or fourth invention, the detection means includes means for detecting that the hydraulic mechanism is abnormal when the hydraulic pressure in the hydraulic mechanism is low. Including. When the hydraulic mechanism is not abnormal, the detection delay time is set based on the time until the hydraulic pressure that has decreased during the temporary stop of the engine rises to a predetermined hydraulic pressure after the engine is started.

  According to the fifth aspect of the invention, the detection delay time is set based on the time until the hydraulic pressure that has decreased during the temporary stop of the engine rises to a predetermined hydraulic pressure (for example, increases to a predetermined hydraulic pressure) It is set with an allowance of 30 to 50% of the time until completion). For this reason, when the hydraulic mechanism is normal, the hydraulic pressure is sufficiently increased, and when the hydraulic mechanism is abnormal, the hydraulic pressure is not sufficiently increased, so that an abnormality of the hydraulic mechanism can be accurately detected.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

  With reference to FIG. 1, a control block of a vehicle on which an abnormality notification device according to an embodiment of the present invention is mounted will be described. In the following description, this abnormality notification device will be described as being applied to a vehicle on which idle stop control is executed. However, a vehicle to which the present invention is applied may be an engine stop, such as a hybrid vehicle. Any vehicle that restarts relatively frequently may be used.

  This vehicle starts engine 100 and restarts engine 100 (starting operation of engine 100 by an ignition switch is started, and starting operation of engine 100 after a temporary stop by an idle stop is referred to as restarting). Power is supplied to the starter 200 for cranking, the alternator 300 connected to the crankshaft pulley and belt of the engine 100, the auxiliary load 400 such as the compressor of the light, audio, and air conditioner, and the starter 200 and the auxiliary load 400. A battery (secondary battery) 500 to be supplied is mounted. Further, the vehicle has a mechanical oil pump (hereinafter simply referred to as an oil pump) 210 connected to the crankshaft pulley of the engine 100 by a belt, and the oil pressure of the engine oil supplied by the oil pump 210 is lower than a set value. When it is low, a pressure switch 220 that outputs an ON signal is mounted. The starter 200 may be a motor generator, and the battery may further include a battery for supplying power when the engine 100 is stopped. In addition, a power storage mechanism such as a capacitor may be used instead of a battery. Oil pump 210 is not limited to a pump that discharges engine oil. The present invention can be applied to abnormality notification of a hydraulic mechanism including a mechanical pump operated by the engine 100. Furthermore, the oil pump 210 is not limited to such a mechanical type. It may be an electric oil pump that is controlled to stop when the engine 100 stops and to start operation when the engine 100 restarts.

  A control system for controlling such a vehicle includes an ABS (Antilock braking System) _ECU (Electronic Control Unit) 1000, an idle stop ECU 2000, an engine ECU 3000, and a meter ECU 2100. The oil pressure warning light 2200 is controlled by the meter ECU 2100 that has received the lighting command signal from the idle stop ECU 2000.

  The ABS_ECU 1000 includes signals from the G sensor 1100 (physical quantity signals representing vehicle inclination and acceleration), signals from the brake master pressure sensor 1200 (physical quantity signals representing the effectiveness of the vehicle braking device), and vehicle speed sensor 1300. (Signals of physical quantities representing the speed of the vehicle) are respectively input.

  Idle stop ECU 2000 receives a brake signal indicating that the brake in conjunction with the brake lamp signal is in operation, a shift signal indicating the shift position of the transmission, and a battery temperature signal indicating the temperature of battery 500.

  The engine ECU 3000 includes a signal from an accelerator switch 3100 for detecting that the accelerator pedal is depressed, a signal from an EPS (Electric Power Steering) sensor 3200 for detecting that the steering is being operated, and the number of revolutions of the engine 100. A signal from the NE sensor 3300 for detecting (NE) and a signal from the cooling water sensor 3400 for detecting the temperature of the cooling water for cooling the engine 100 are input.

  Further, a sensor signal is transmitted from ABS_ECU 1000 to idle stop ECU 2000, a restart command signal and a stop command signal for engine 100 are transmitted from idle stop ECU 2000 to engine ECU 3000, and a sensor signal is transmitted from engine ECU 3000 to idle stop ECU 2000. Engine ECU 3000 transmits a restart signal to starter 200 based on the restart command signal of engine 100 received from idle stop ECU 2000, starter 200 cranks engine 100, and engine 100 restarts.

  As the stop condition of the engine 100 in such idle stop control, for example, the accelerator opening is 0, 1 second or more has passed after the shift operation, the vehicle speed is 0 km / h, the engine speed Is 1000 rpm or less, climbing / tilting determination is 8 ° or less, engine cooling water temperature is 65 ° C to 105 ° C, battery temperature is 0 ° C to 55 ° C, and brake master pressure is sufficient That is, the pressure must be higher than the braking force, and all the conditions such as the steering operation not being performed immediately before stopping are satisfied. Note that the types of conditions and the numerical values in the conditions are examples.

  Idle stop ECU 2000 that realizes the abnormality notification device according to the present embodiment immediately provides meter ECU 2100 even when hydraulic switch 220 is on (hydraulic pressure is lower than a predetermined set value) when returning from idle stop. Instead of displaying the hydraulic warning light 2200 via the engine, the time from when the engine 100 is restarted until the display command of the hydraulic warning light 2200 is permitted is changed according to the duration of the idle stop. Yes. Further, the idle stop ECU 2000 determines that the hydraulic pressure has decreased even though the hydraulic switch 220 is turned on before the idle stop is executed (in this case, the engine 100 is operating normally). The oil pressure warning light 2200 is turned on even during idling stop.

  FIG. 2 shows a map stored in the memory or the like of the idle stop ECU 2000 in FIG. This map shows the relationship between the idle stop duration it and the post-explosion mask time mt. As shown in FIG. 2, when the idle stop duration time it becomes longer, the post-explosion mask time mt becomes longer. Such a characteristic is that, in an idle stop vehicle that does not execute the control according to the present embodiment, for example, the time until the hydraulic warning light is extinguished after the complete explosion of engine 100 (after exceeding 800 rpm), the idle stop is continued. Calculation is performed by changing the time it. Thus, the time increased by 30 to 50% to the experimentally measured time is set as a post-explosion mask time mt. This post-combustion mask time mt can also be said to be a delay time from when the engine 100 is restarted until the display command of the hydraulic warning light 2200 is permitted.

  In the following description, it is assumed that the post-explosion mask time mt is represented by a function f having the idle stop duration it as a parameter. The map shown in FIG. 2 is an example, and the present invention is not limited to the map shown in FIG.

  With reference to FIG. 3, a control structure of a program executed by idle stop ECU 2000 of FIG. 1 will be described.

  At step (hereinafter step is abbreviated as S) 100, idle stop ECU 2000 determines whether or not an idle stop condition is satisfied. At this time, as described above, the idle stop ECU 2000 has, for example, the accelerator opening is 0, 1 second or more has elapsed after the shift operation, the vehicle speed is 0 km / h, and the engine speed is 1000 rpm or less. The climbing / tilting determination is 8 ° or less, the engine coolant temperature is 65 ° C to 105 ° C, the battery temperature is 0 ° C to 55 ° C, and the braking master pressure is sufficient. If the steering pressure is not operated immediately before stopping, it is determined that the idle stop condition is satisfied. If the idle stop condition is satisfied (YES in S100), the process proceeds to S200. If not (NO in S100), the process returns to S100.

  In S200, idle stop ECU 2000 determines whether or not the signal from hydraulic switch 220 is on. If the signal from hydraulic switch 220 is on (YES in S200), the process proceeds to S300. If not (NO in S200), the process proceeds to S400.

  At S300, idle stop ECU 2000 sets an OP (LO) flag that is a flag corresponding to hydraulic switch 220 being on. If this OP (LO) flag has already been set, the set state is maintained.

  At S400, idle stop ECU 2000 stops fuel injection to engine 100 and executes fuel cut (idle stop). Idle stop ECU 2000 outputs a stop command signal to engine ECU 3000, and engine ECU 3000 stops fuel injection control and ignition control. Since the engine 100 is stopped by this process, the oil pump 210 is also stopped, and the oil pressure of the engine oil is lowered with the lapse of the idle stop time.

  In S500, idle stop ECU 2000 determines whether or not the OP (LO) flag is set. If the OP (LO) flag is set (YES in S500), the process proceeds to S600. If not (NO in S500), the process proceeds to S700. Note that the state of the OP (LO) flag corresponds to the state of the hydraulic switch 220 before the idling stop is executed, so that the oil pressure warning light 2200 is turned on / off based on the OP (LO) flag during the idling stop. By controlling the turn-off, the hydraulic pressure abnormality before the idle stop can be displayed during the idle stop.

  In S600, idle stop ECU 2000 outputs a command signal to meter ECU 2100 so that oil pressure warning light 2200 is lit. Thereby, for example, the hydraulic warning lamp 2200 provided in the instrument panel is turned on. If a command signal for turning on the hydraulic warning light 2200 has already been output to the meter ECU 2100, the lighting of the hydraulic warning light 2200 is continued.

  In S700, idle stop ECU 2000 determines whether or not a restart condition is satisfied. At this time, as described above, the idle stop ECU 2000 is one of the idle stop conditions for the accelerator opening, the vehicle speed, the engine speed, the climb / inclination, the engine coolant temperature, the battery temperature, and the brake master pressure, for example. However, if it is not established, it is determined that the restart condition is established. If the restart condition is satisfied (YES in S700), the process proceeds to S800. If not (NO in S700), the process returns to S700.

  In S800, idle stop ECU 2000 calculates idle stop duration it from when engine 100 is idle stopped until a restart condition is satisfied. This idle stop duration it is calculated based on, for example, the count value of an integration timer provided in the idle stop ECU 2000. The idle stop duration it may be the time from when the engine 100 is idle stopped until the engine is actually restarted.

  In S900, idle stop ECU 2000 calculates post-explosion mask time mt by using mt = f (it), for example, using function f shown in the map of FIG.

  In S1000, idle stop ECU 2000 executes a restart process of engine 100. The idle stop ECU 2000 outputs a restart command signal to the engine ECU 3000, and the engine ECU 3000 cranks the engine 100 with the starter 200, and executes fuel injection control and ignition control.

  In S1100, idle stop ECU 2000 determines whether or not mask time mt after the complete explosion has elapsed since engine 100 has completely exploded. It should be noted that if engine speed is stably about 800 rpm or higher, it can be determined that engine 100 has completely exploded. If mask time mt elapses after complete explosion after engine 100 complete explosion (YES in S1100), the process proceeds to S1200. If not (NO in S1100), the process returns to S1100 and waits until the mask time mt elapses after the complete explosion after the engine 100 completes the explosion.

  At S1200, idle stop ECU 2000 determines whether or not the signal from hydraulic switch 220 is on. If the signal from hydraulic switch 220 is on (YES in S1200), the process proceeds to S1300. If not (NO in S1200), the process proceeds to S1400.

  In S1300, idle stop ECU 2000 outputs a command signal to meter ECU 2100 so that oil pressure warning light 2200 is lit. Thereby, for example, the hydraulic warning lamp 2200 provided in the instrument panel is turned on. If a command signal for turning on the hydraulic warning light 2200 has already been output to the meter ECU 2100, the lighting of the hydraulic warning light 2200 is continued. As a result, when the hydraulic switch 220 is turned on before idling stop, the hydraulic warning light 2200 continues to be lit regardless of before and after idling stop.

  In S1400, idle stop ECU 2000 outputs a command signal to meter ECU 2100 so that oil pressure warning light 2200 is turned off (if the lighting command signal is output, stop the output. Good). If the OP (LO) flag is set, it is reset. As a result, the oil pressure warning light 2200 that has been turned off is turned off, or the light-off state of the oil pressure warning light 2200 that has been turned off is continued.

  The operation of the hydraulic pressure abnormality notification process in the vehicle equipped with the idle stop ECU 2000 that implements the abnormality notification device according to the present embodiment based on the above-described structure and flowchart will be described. In the following description, the description will be divided into four cases, but the same description as in other cases will not be repeated even if the description is different.

<When the hydraulic system is abnormal before idling stop and the abnormality continues>
When the idle stop vehicle temporarily stops with a red signal or the like while traveling and the idle stop condition is satisfied (YES in S100), it is determined whether or not the signal from hydraulic switch 220 is on. If an abnormality has occurred in the hydraulic system and the engine oil pressure (hydraulic pressure) is low, an ON signal is output from hydraulic switch 220 (YES in S200). In such a case, the OP (LO) flag is set. This is a case where an abnormality is detected before idling stop.

  When the fuel injection to the engine 100 is stopped (fuel cut) and the idle stop is executed (S400), the OP (LO) flag is set (YES in S500), so the oil pressure warning light 2200 is lit. Is done. At this time, an abnormality occurred in the hydraulic system before the start of the idle stop, an ON signal was output from the hydraulic switch 220, and the hydraulic warning light 2200 was lit. For this reason, the hydraulic warning light 2200 continues to be lit regardless of whether the idle stop is started or not. That is, just because the idle stop is started, the hydraulic warning light 2200 is not turned off.

  When the restart condition is satisfied by the driver depressing the accelerator pedal (YES in S700), the idle stop duration time it is calculated (S800), and the post-explosion mask corresponding to this idle stop duration time it is calculated. Time mt is calculated (S900). Even if the restart time of the engine 100 is executed (S1000) and the mask time mt after the complete explosion elapses after the rotational speed of the engine 100 stably reaches about 800 rpm or more (YES in S1100), the hydraulic system Therefore, the ON signal is output from the hydraulic switch 220 (YES in S1200). For this reason, the oil pressure warning light 2200 continues to be lit.

  In this case, since the hydraulic pressure abnormality has occurred before and after the idle stop (fuel cut), the hydraulic pressure warning light 2200 is lit before, during the idle stop, and after the idle stop.

  As a result, it is possible to notify the driver of an abnormality in the hydraulic system that occurs before the start of the idle stop and that has occurred after the engine restart by continuing to turn on the hydraulic warning light. For this reason, it is possible to promptly notify the driver of the abnormality of the hydraulic pressure without feeling uncomfortable.

<When the hydraulic system is abnormal before idling stop and the problem is resolved>
The process from when the restart condition is satisfied until the mask time mt after the complete explosion elapses is the same as that described above, and therefore the description of this part will not be repeated.

  If the mask time mt elapses after the complete explosion after the restart condition is satisfied (YES in S1100), the hydraulic system abnormality has been resolved, so the ON signal is not output from hydraulic switch 220 (NO in S1200). . Therefore, the oil pressure warning light 2200 is controlled to be turned off, and the OP (LO) flag is reset (S1400).

  In this case, since the hydraulic pressure abnormality that occurred before the idle stop is resolved after the idle stop, the mask time after the complete explosion before the idle stop, during the idle stop, after the engine 100 is restarted. The oil pressure warning light 2200 is continuously lit until mt elapses. When the mask time mt elapses after the complete explosion, the hydraulic warning lamp 2200 is turned off.

  As a result, the abnormality of the hydraulic system that occurred before the start of the idle stop and has been resolved after the engine restart can be performed after the restart after the completion of the mask time after the complete explosion (the passage of time until the hydraulic pressure rises). (Waiting for) The oil pressure warning light was turned off after judging that the oil pressure was normal. For this reason, it is possible to notify the driver of the hydraulic pressure abnormality and the solution of the hydraulic pressure abnormality without feeling uncomfortable.

<When the hydraulic system is normal before idling stop and continues normal>
When the idle stop vehicle temporarily stops with a red signal or the like while traveling and the idle stop condition is satisfied (YES in S100), it is determined whether or not the signal from hydraulic switch 220 is on. Since no abnormality has occurred in the hydraulic system and the pressure (hydraulic pressure) of the engine oil is not low, an ON signal is not output from hydraulic switch 220 (NO in S200). In such a case, the OP (LO) flag is not set.

  When fuel injection to the engine 100 is stopped (fuel cut) and an idle stop is executed (S400), the OP (LO) flag is not set (NO in S500), so the oil pressure warning light 2200 is lit. Not. At this time, before the start of the idle stop, no abnormality occurred in the hydraulic system, the ON signal was not output from the hydraulic switch 220, and the hydraulic warning light 2200 was turned off. For this reason, the oil pressure warning light 2200 continues to be extinguished regardless of whether the idle stop is started or not.

  When the restart condition is satisfied by the driver depressing the accelerator pedal (YES in S700), the idle stop duration time it is calculated (S800), and the post-explosion mask corresponding to this idle stop duration time it is calculated. Time mt is calculated (S900). Even if the restart time of the engine 100 is executed (S1000) and the mask time mt after the complete explosion elapses after the rotational speed of the engine 100 stably reaches about 800 rpm or more (YES in S1100), the hydraulic system Therefore, no ON signal is output from the hydraulic switch 220 (NO in S1200). For this reason, the oil pressure warning light 2200 continues to be turned off.

  In this case, since the hydraulic pressure abnormality does not occur before and after the idle stop (fuel cut), the hydraulic pressure warning lamp 2200 is turned off before, during, and after the idle stop. In particular, immediately after the engine 100 is restarted, the hydraulic pressure is low and an ON signal is output from the hydraulic switch 220. However, until the mask time mt after the complete explosion elapses, a hydraulic pressure warning based on the state of the hydraulic switch 220 The lighting / extinguishing control of the lamp 2200 is not executed. Further, even if the idle stop time is long and the oil pressure is greatly reduced and it takes time to return, the longer the idle stop time it is, the longer the post-explosion mask time mt is set. Therefore, when the hydraulic system is normal, the hydraulic warning light 2200 can be prevented from being lit without being affected by the length of the idle stop time.

  Thereby, it is possible to notify the driver that the hydraulic system that has not occurred before the start of the idle stop or after the engine restart is not abnormal by keeping the hydraulic warning light off. In particular, even if the oil pressure is low, such as immediately after engine restart, the oil pressure warning light does not light, so it is possible to notify the driver that the oil pressure is not abnormal without a sense of incongruity.

<If the hydraulic system is normal before idling stop and then becomes abnormal>
The process from when the restart condition is satisfied until the mask time mt after the complete explosion elapses is the same as that described above, and therefore the description of this part will not be repeated.

  When mask time mt elapses after the complete explosion after the restart condition is satisfied (YES in S1100), the hydraulic system is abnormal, so that the hydraulic pressure does not rise sufficiently and an ON signal is output from hydraulic switch 220 ( YES at S1200). For this reason, it controls so that the oil pressure warning light 2200 is lit (S1300).

  In this case, since the hydraulic pressure abnormality that has not occurred before the idle stop occurs after the idle stop, the mask after the complete explosion is performed before the idle stop, during the idle stop, after the engine 100 is restarted. Until the time mt elapses, the oil pressure warning light 2200 is continuously turned off. When the mask time mt elapses after the complete explosion, the hydraulic warning light 2200 is turned on.

  As a result, an abnormality in the hydraulic system that occurs after the engine is temporarily stopped due to the idle stop and the oil pump is stopped and the hydraulic pressure is reduced can be notified to the driver as quickly as possible without feeling uncomfortable. .

  In the embodiment described above, the notification to the driver that the hydraulic system is abnormal is realized by turning on an indicator lamp (hydraulic warning lamp), but the present invention is not limited to this. In addition to turning on the hydraulic warning light, a warning sound (buzzer sound, etc.), warning sound (synthesized voice, etc.), warning characters are displayed on a part of the display monitor such as navigation, etc. What is necessary is just to notify the driver of the abnormality of the hydraulic system by combining them.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a control block diagram of a vehicle in which the abnormality notification device according to the present embodiment is mounted. It is a figure which shows the map memorize | stored in idle stop ECU of FIG. It is a flowchart which shows the control structure of the oil pressure warning light display program performed with the idle stop ECU of FIG.

Explanation of symbols

  100 Engine, 200 Starter, 210 Oil pump, 220 Pressure switch, 300 Alternator, 400 Auxiliary load, 500 Battery, 1000 ABS_ECU, 2000 Idle stop ECU, 2100 Meter ECU, 2200 Hydraulic warning light, 3000 Engine ECU.

Claims (5)

An abnormality notification device for a vehicle that temporarily stops an engine when a vehicle condition satisfies a predetermined condition, the vehicle including a pump that is stopped when the engine is temporarily stopped and is activated when the engine is restarted A hydraulic mechanism,
Detecting means for detecting an abnormality of the hydraulic mechanism;
Calculating means for calculating a detection delay time according to the temporary stop time;
When an abnormality is detected by the detection means, notification means for notifying the driver of the abnormality;
When the engine is temporarily stopped and then restarted, the vehicle abnormality notification device includes prohibiting means for prohibiting abnormality notification by the notification means until the detection delay time elapses.   The abnormality notification device further includes means for canceling prohibition of abnormality notification by the prohibiting means when an abnormality of the hydraulic mechanism is detected before the engine is temporarily stopped. The vehicle abnormality notification device described.   The vehicle abnormality notification device according to claim 1, wherein the calculation unit includes a unit for calculating the detection delay time based on the temporary stop time and a predetermined map.   The vehicle abnormality notification device according to claim 1, wherein the calculation unit includes a unit for calculating the detection delay time so that the longer the temporary stop time is, the longer the temporary stop time is. The detection means includes means for detecting that the hydraulic mechanism is abnormal when the hydraulic pressure in the hydraulic mechanism is low,
The detection delay time is set based on the time until the hydraulic pressure that has decreased during the temporary stop of the engine rises to a predetermined hydraulic pressure after the engine is started when the hydraulic mechanism is not abnormal. The vehicle abnormality notification device according to claim 3 or 4.

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