JP5218205B2 - Hybrid vehicle - Google Patents

Description

  The present invention relates to a hybrid vehicle that includes an internal combustion engine and an electric motor and travels by the driving force of one or both of the internal combustion engine and the electric motor.

  Conventionally, as a hybrid vehicle, for example, as described in Japanese Patent Application Laid-Open No. 2008-120333, estimation means for estimating an EV travelable distance based on a battery charge amount, and the EV travelable distance are set by a navigation device. A device having a comparison means for comparing with a travel distance to a destination and a control means for controlling warming up of a catalytic converter is known. This hybrid vehicle prevents deterioration of fuel consumption by prohibiting the warm-up of the catalytic converter when the EV travelable distance is larger than the travel distance to the destination.

JP 2008-120333 A

  However, in the above hybrid vehicle, the destination is set after the ignition is turned on and the EV travelable distance is estimated, but at the time of the ignition being turned on, the navigation device is not activated and the temperature condition of the catalytic converter is satisfied. If this happens, the engine is started, and there is a problem of consuming fuel consumption.

  The present invention has been made to solve such a technical problem, and an object of the present invention is to provide a hybrid vehicle that can reliably prevent wasteful consumption of fuel consumption.

  A hybrid vehicle according to the present invention is equipped with an internal combustion engine and an electric motor, and in a hybrid vehicle that travels by driving force of one or both of the internal combustion engine and the electric motor, a catalytic converter that purifies exhaust gas of the internal combustion engine, and electric power to the electric motor Power storage means for supplying the vehicle, calculation means for calculating a travelable distance by the electric motor after the next ignition on the basis of the remaining amount of the power storage means at the time of ignition off of the vehicle, up to the next destination of the vehicle and its destination Control means for controlling the warm-up of the catalytic converter based on the travelable distance calculated by the calculation means and the travel distance estimated by the estimation means. If the travelable distance calculated by the calculation means is greater than the travel distance estimated by the estimation means, the means And inhibits the warm-up of catalytic converter during Yon'on.

  In the hybrid vehicle according to the present invention, the calculating means calculates the travelable distance by the electric motor after the next ignition on based on the remaining amount of the power storage means at the time of ignition off of the vehicle, and the estimating means determines the next destination of the vehicle The travel distance to the destination is estimated, and the control means prohibits warming up of the catalytic converter at the next ignition ON when the calculated travelable distance is larger than the estimated travel distance. Therefore, it becomes possible to determine whether or not the catalytic converter needs to be warmed up at the time of ignition off, and wasteful consumption of fuel consumption can be reliably prevented.

  In the hybrid vehicle according to the present invention, it is preferable that the estimation means estimates a destination and a travel distance to the destination based on a past travel history of the vehicle. In this case, the reliability of the estimation result can be improved.

  The present invention provides a hybrid vehicle that can reliably prevent wasteful consumption of fuel consumption.

1 is a schematic configuration diagram of a hybrid vehicle according to an embodiment of the present invention. It is a flowchart which shows the control process of the hybrid vehicle which concerns on embodiment of this invention. It is a flowchart which shows the control process of the hybrid vehicle which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a schematic configuration diagram of a hybrid vehicle according to an embodiment of the present invention. The hybrid vehicle 1 is a vehicle that switches between motor-driven travel (hereinafter referred to as EV (Electric Vehicle) travel) and hybrid travel (hereinafter referred to as HV (Hybrid Vehicle) travel). The hybrid vehicle 1 includes a navigation ECU (Electronic Control Unit) 2 and a vehicle ECU 3. Here, the ECU is a control unit for controlling the entire apparatus, and includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), an input / output interface, and the like. Yes.

  The navigation ECU 2 is an electronic control unit that performs overall control of the navigation system. The navigation ECU 2 detects the current position and traveling direction of the host vehicle based on GPS signals received from GPS satellites at regular intervals, detection values detected by various sensors, and various map data stored in the database 24. . Further, when the destination is set, the navigation ECU 2 calculates a route to the destination based on various map data stored in the database 24, and provides route guidance so as to travel along the route. Do.

  The navigation ECU 2 includes a calculation unit 21, a planning unit 22, a determination unit 23, and a database 24. The database 24 stores various map data and information such as speed limit in the route, road gradient, and travel distance. The calculation part 21 acquires each information from the database 24, and calculates driving | running | working power. The planning unit 22 makes an energy consumption plan for all routes based on each information stored in the database 24 and regeneration of the motor 5 in the route. The determination unit 23 determines whether or not the entire route is possible by EV traveling based on the remaining amount of the battery 7.

  The vehicle ECU 3 is a control unit for controlling the entire vehicle, and includes a calculation unit 31, an estimation unit 32, a control unit 33, and a memory 34. The calculation unit 31 calculates a travelable distance by the battery 7 after the next ignition is turned on based on the remaining amount of the battery 7 when the ignition (hereinafter referred to as IG) of the vehicle is turned off.

  The estimation unit 32 estimates the next destination of the vehicle and the travel distance to the destination. Specifically, the estimation unit 32 estimates the destination and its route in the next driving by the driver's behavior learning and the destination estimation technique. Further, the estimation unit 32 estimates the destination and the travel distance to the destination based on the past travel history of the vehicle stored in the memory 34. In this case, the reliability of the estimation result can be improved.

  The control unit 33 controls the engine 4 according to whether or not idling is necessary. Further, the control unit 33 controls the warm-up of the catalytic converter 6 based on the travelable distance calculated by the calculation unit 31 and the travel distance estimated by the estimation unit 32. For example, the control unit 33 compares the travelable distance calculated by the calculation unit 31 with the travel distance estimated by the estimation unit 32, and when the calculated travelable distance is larger than the estimated travel distance. The warming-up of the catalytic converter 6 at the next IG ON is prohibited.

  The control unit 33 controls the vehicle speed and traveling power of the vehicle. The memory 32 stores various data. The memory 32 stores a past travel history of the vehicle.

  The hybrid vehicle 1 includes an engine 4 and a motor 5. In the hybrid vehicle 1, in the case of EV traveling, the motor 5 is disconnected from the engine 4 and traveled only by the motor 5, and in the case of HV traveling, the vehicle travels by the engine 4 and the motor 5, and the engine 4 is a main drive source. The motor 5 assists.

  A catalytic converter 6 for purifying exhaust gas discharged from the engine 4 is provided in the exhaust passage of the engine 4. In this catalytic converter 6, when the temperature is low, the catalyst is not sufficiently activated, and the exhaust gas purification action by the catalyst does not function. Therefore, in order for the catalytic converter 6 to function, it is necessary to warm up the catalytic converter 6.

  The battery 7 supplies power to the motor 5 and can be charged from an external power source in addition to charging by regeneration of the motor 5. The control unit 33 has a function of controlling the charged amount of the battery 7, that is, SOC (State of Charge) so as to keep it at a predetermined target value. For example, the SOC of the battery 7 is detected, and the output of the engine 4 is appropriately adjusted so that the SOC becomes a target value, and the battery 7 is charged with the generated power to control the SOC.

  Hereinafter, the control process of the hybrid vehicle 1 will be described with reference to FIGS. 2 and 3.

  FIG. 2 is a flowchart showing control processing of the hybrid vehicle according to the present invention. First, in the process of S11, the SOC remaining amount is acquired. Specifically, when the vehicle arrives at the destination or arrives at the charging facility, the current SOC remaining capacity is acquired from CAN (Controller Area Network) information using IG OFF as a trigger. For example, when the arrival point is a charging facility, the SOC remaining capacity at the start of the next travel (IG on) is estimated, and the SOC remaining capacity at full charge is calculated.

  In the process of S12 following the process of S11, the destination and route of the next driving are estimated. At this time, the estimation unit 32 estimates the destination in the next driving and the travel route to the destination by the driver's behavior learning and the destination estimation technique.

  In the process of S13 following the process of S12, the motor running power is calculated. Specifically, the calculation unit 21 first calculates travel power based on the destination and travel route estimated in S12 and the speed limit and gradient information acquired from the database 24. Next, the calculation unit 21 calculates the amount of electric power required to travel the entire route with the motor 5 based on the calculated traveling power and the travel distance acquired from the navigation ECU 2.

  The determination unit 23 derives an idling necessity / unnecessary flag for the next traveling by comparing the SOC remaining capacity with the amount of electric power necessary to travel the motor along the entire route. Specifically, when the SOC remaining capacity is larger than the amount of electric power required to run the motor on all routes, it is determined that the motor 5 can run all the routes, and an idling unnecessary flag is derived. In this case, warming up of the catalytic converter 6 when the IG is turned on next time is prohibited.

  On the other hand, if the amount of electric power required to run the motor on the entire route is larger than the SOC remaining capacity, it is determined that the motor 5 alone cannot run on the entire route, and an idling required flag is derived.

  In the process of S14 following the process of S13, the idling necessity / unnecessary flag derived in S13, the route information, and the next estimated travel date / time are transmitted to the vehicle ECU 3. The vehicle ECU 3 receives these pieces of information and stores them in the memory 34.

  In the process of S15 following the process of S14, it is determined whether or not the data is already stored in the memory. When it is determined that the data is already stored in the memory 34, a series of control processing ends. On the other hand, if it is determined that it has not been stored in the memory 34, the process returns to S11, and the SOC remaining amount is acquired again.

  FIG. 3 is a flowchart showing control processing of the hybrid vehicle according to the present invention. This control process is executed when the IG is on.

  First, in the process of S21, it is determined whether or not there is a memory information confirmation time difference. At this time, the vehicle ECU 3 reads the next estimated travel date and time stored in the memory 34 and compares the estimated next travel date and time with the current time. If it is determined that there is a time difference exceeding a certain value, the control process proceeds to S22, and idling and normal running are performed. When the process of S22 is finished, a series of control processes are finished.

  On the other hand, when it is determined in S21 that there is no time difference, the control process proceeds to S23, and it is determined whether or not the idling determination flag is ON. At this time, the vehicle ECU 3 reads the idling necessity / unnecessary flag stored in the memory, and determines whether or not the idling control can be performed based on the flag state.

  If it is determined that the flag is ON, the control process proceeds to S22 where idling is performed and normal travel is performed. On the other hand, when it is determined that the flag is OFF, the vehicle 5 travels on the entire route without idling (S24). When the process of S24 is finished, a series of control processes are finished.

  In hybrid vehicle 1 configured in this way, when IG is off, the remaining amount of SOC is compared with the amount of electric power required to run the motor on all routes, so that the temperature of catalyst converter 6 when IG is turned on next time is compared. Necessity of machine is determined. If the SOC remaining capacity is larger than the amount of electric power required to run the motor on the entire route, it is determined that the motor 5 alone can run the entire route, and the catalytic converter 6 is warmed up when the IG is turned on next time. It is forbidden. As a result, wasteful consumption of fuel consumption can be reliably prevented.

  The above-described embodiment describes an example of a hybrid vehicle according to the present invention, and the hybrid vehicle according to the present invention is not limited to that described in the embodiment. The hybrid vehicle according to the present invention may be obtained by modifying the hybrid vehicle according to the embodiment so as not to change the gist described in each claim, or by applying the hybrid vehicle to another one.

DESCRIPTION OF SYMBOLS 1 ... Hybrid vehicle, 2 ... Navi ECU, 3 ... Vehicle ECU, 4 ... Engine, 5 ... Motor, 6 ... Catalytic converter, 7 ... Battery, 31 ... Calculation part, 32 ... Estimation part, 33 ... Control part.

Claims (2)

In a hybrid vehicle equipped with an internal combustion engine and an electric motor and traveling by driving force of one or both of the internal combustion engine and the electric motor,
A catalytic converter for purifying exhaust gas of the internal combustion engine;
Power storage means for supplying power to the motor;
Calculation means for calculating a travelable distance by the electric motor after the next ignition on, based on a remaining amount of the power storage means at the time of ignition off of the vehicle;
An estimation means for estimating a next destination of the vehicle and a travel distance to the destination;
Control means for controlling warm-up of the catalytic converter based on the travelable distance calculated by the calculation means and the travel distance estimated by the estimation means;
With
The control means prohibits warming-up of the catalytic converter when the ignition is turned on next time when the travelable distance calculated by the calculation means is larger than the travel distance estimated by the estimation means. Hybrid vehicle. The hybrid vehicle according to claim 1, wherein the estimating unit estimates a destination and a travel distance to the destination based on a past travel history of the vehicle.

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