CN104870786B - Idle stop device - Google Patents
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- CN104870786B CN104870786B CN201380069468.XA CN201380069468A CN104870786B CN 104870786 B CN104870786 B CN 104870786B CN 201380069468 A CN201380069468 A CN 201380069468A CN 104870786 B CN104870786 B CN 104870786B
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Abstract
Make simple for structureization of idle stop device.Idle stop device（100）Possesses the deceleration detector of the deceleration of detection vehicle（200）.In addition, idle stop device（100）Possess based on by deceleration detector（200）The estimating unit of the 1st deceleration when deceleration, the speed of acquirement vehicle detected is decelerated to below preset speed（350）.Estimating unit（350）Based on the 1st acquired deceleration, thus it is speculated that the 1st brake pressure of vehicle when vehicle is decelerated to below preset speed.Also, idle stop device（100）Possess：ISC（400）, by estimating unit（350）The 1st brake pressure deduced is in the case of more than preset threshold value, by the engine stop of vehicle；And ESP（300）, to hydraulic circuit（10）The open and close controlling signal of sending valve, brake pressure is kept.
Description
Technical field
The present invention relates to idle stop devices.
Background technology
In the past, in the vehicle controls such as automobile, carry out by during the parked vehicle of vehicle or the signal of vehicle wait
During wait in by engine stop, realize saving of fuel and discharge gas cut down idle stop control.
In idle stop control, it is desirable that prevent vehicle from suddenly starting to walk when engine is restarted.Therefore, in idle stop control
In system, the big condition of starting torque when meeting the braking moment generated by the brake pressure of vehicle than engine start
In the case of, have keep the brake pressure and by the situation of engine stop.
On this point, in the prior art, the brake pressure of vehicle, is equipped with detection brake fluid in the car in order to obtain
The various sensors such as the sensor of pressure or the sensor of path increment of detection brake pedal.Conventional art is examined by these sensors
Survey the brake operation amount of driver（Brake pressure）, will system in the case where the brake pressure detected is more than defined threshold value
Hydrodynamic pressure keep and by engine stop.
Patent document 1：Special open 2006-131121 publications.
The content of the invention
But conventional art is on the simple for structureization not consideration for making idle stop device.
That is, conventional art is the sensing using the path increment of the sensor or detection brake pedal of the hydraulic pressure of detection brake
Device detects the brake operation amount of driver（Brake pressure）Technology.Thus, in the prior art, due to setting this in the car
A little various sensors are necessary, so there is the situation that apparatus structure complicates.
The idle stop device of the present application is in view of the above subject is made, and is possessed：Test section detects subtracting for vehicle
Speed；Estimating unit, based on the deceleration detected by above-mentioned test section, the speed for obtaining above-mentioned vehicle is decelerated to and presets
Speed below when the 1st deceleration, based on the 1st acquired deceleration, thus it is speculated that above-mentioned vehicle is decelerated to above-mentioned to be set in advance
1st brake pressure of above-mentioned vehicle when below fixed speed；Braking pressure control portion, in deduced by above-mentioned estimating unit
The brake pressure of above-mentioned vehicle is in the case of more than preset threshold value, is kept by 1 brake pressure；It is controlled with idle stop
Portion, in the case where the 1st brake pressure deduced by above-mentioned estimating unit is more than preset threshold value, by above-mentioned vehicle
Engine stop.
That is, the acceleration of detection vehicle is usually equipped in the car（Deceleration）Test section.The present application is by making
With the deceleration detected by the test section, without using detection brake fluid pressure sensor or detect the path increment of brake pedal
Sensor etc. and carry out idle stop control.More particularly, the present application is decelerated to preset speed based on vehicle
The 1st deceleration when below degree, thus it is speculated that the brake pressure of vehicle at this time（1st brake pressure）.Thus, it is possible to be not arranged in
The various sensors that are used into technology and carry out idle stop control.As a result, according to the present application, idle stop can be made
Simple for structureization of device.
In addition, in the case, the weight that above-mentioned estimating unit can be based on above-mentioned the 1st acquired deceleration, above-mentioned vehicle
The braking efficiency of amount and above-mentioned vehicle, thus it is speculated that above-mentioned vehicle when above-mentioned vehicle is decelerated to below above-mentioned preset speed
Brake pressure.
In addition, above-mentioned estimating unit can obtain deceleration when above-mentioned vehicle is decelerated to below speed when soon stopping
As above-mentioned 1st deceleration, based on the 1st acquired deceleration, thus it is speculated that above-mentioned vehicle is decelerated to speed when soon stopping
The brake pressure of above-mentioned vehicle when following.
In addition, subtracting on above-mentioned vehicle is acted on corresponding to the gradient on the road surface of above-mentioned vehicle traveling being also equipped with detection
In the case of the inclination detecting section of speed, Ke Yishi, above-mentioned estimating unit is after the stopping of above-mentioned vehicle, based in the stopping of above-mentioned vehicle
In the state of the 2nd deceleration that is detected by above-mentioned inclination detecting section speculate the 2nd brake pressure of above-mentioned vehicle, this is deduced
The 2nd brake pressure compared with above-mentioned 1st brake pressure, export the brake pressure of the higher person；Above-mentioned braking pressure control portion exists
The brake pressure of above-mentioned vehicle is in the case of more than preset threshold value, is protected by the brake pressure exported from above-mentioned estimating unit
It holds；Above-mentioned idle stop control unit is situation more than preset threshold value in the brake pressure exported from above-mentioned estimating unit
Under, by the engine stop of above-mentioned vehicle.
Thereby, it is possible to account for the appropriate idle stop control of the gradient on the road surface of vehicle traveling.
In addition, above-mentioned estimating unit can be after the stopping of above-mentioned vehicle, based on above-mentioned 2nd deceleration, the weight of above-mentioned vehicle
With the braking efficiency of above-mentioned vehicle, thus it is speculated that the brake pressure of above-mentioned vehicle.
According to such the present application, simple for structureization of idle stop device can be made.
Description of the drawings
Fig. 1 is the figure of the vehicle braking hydraulic circuit for the embodiment for representing the present application.
Fig. 2 is the block diagram of the idle stop device of the 1st embodiment of the present application.
Fig. 3 is by the control flow chart of the idle stop device execution of the 1st embodiment.
Fig. 4 is the figure of the time diagram of the state of the various parts of vehicle when representing to perform idle stop control.
Fig. 5 is by the control flow chart of the idle stop device execution of the 2nd embodiment.
Specific embodiment
Hereinafter, the embodiment of the present application is illustrated referring to the drawings.
First, the braking hydraulic circuit in the vehicle for the idle stop device for applying the present application is illustrated using Fig. 1
Outline.
As shown in Figure 1, the braking hydraulic circuit of present embodiment is that possess two braking systems and with each system with before 1
Wheel and trailing wheel in the position diagonal with it are the hydraulic circuit of 1 group of so-called X-type piping method braked, but the application
It's not limited to that for invention.In addition, present embodiment illustrates as an example of lifting 4 wheel vehicles, but the present application is not limited to 4 wheels
Vehicle can be widely applied in the also vehicle including two wheeler.
In hydraulic circuit 10 shown in Fig. 1, the legpower being applied on brake pedal 1 is amplified by step-up system 3, to conduct
The master cylinder 4 of hydraulic pressure occurring source transfers.In master cylinder 4, it is formed with not shown first piston and second piston is drawn
Fixed Liang Ge compression chambers.Corresponding to brake pedal operation, each piston is pushed so that brake fluid is via connecting with each compression chamber
Hydraulic port P1, P2 is moved into hydraulic circuit 10.
In addition, step-up system 3 is, for example, Pneumatic booster, via input lever（It is not shown）It is connected to brake pedal 1
Side, by the legpower being amplified via the push rod being attached on first piston（It is not shown）It is transferred to master cylinder 4.In addition, with
Past step-up system is similary, and step-up system 3 has so-called jumping characteristic, between input lever and reaction tray on push rod
Equipped with defined gap（In other words shifting region）, principal pressure is mechanically attached at the input lever for being formed in step-up system 3
Middle reaction force becomes the region of very little during before on the push rod of cylinder 4.
Each wheel is respectively facing from hydraulic port P1, P2 of master cylinder 4（RF、LR、LF、RR）Wheel brake cylinder extension
Go out brake piping MC1, MC2.As described above, the hydraulic circuit in the brake apparatus of present embodiment is X-type piping method,
In the example of Fig. 1, hydraulic circuit 10 is configured to, by brake piping MC2 to off-front wheel（RF）The wheel system of liquid braking device 19
Dynamic cylinder and left rear wheel（LR）The wheel brake cylinder supply brake fluid of liquid braking device 18.On the other hand, hydraulic circuit 10 is configured to,
By brake piping MC1 to the near front wheel（LF）The wheel brake cylinder and off hind wheel of liquid braking device 20（RR）Liquid braking device 21
Wheel brake cylinder supplies brake fluid.Each brake 18,19,20,21 is acted by wheel brake cylinder under pressure as a result, can
Brake force is generated to wheel.
The hydraulic circuit of each system as solenoid valve and including be open type and be capable of the circuit control valve 11 of Linear Control,
Be closed type and by the inlet valve 12 of open and close control, be open type and be capable of pressure charging valve 13f, 13r of Linear Control and be
Closed type and pressure reducing valve 14f, the 14r controlled by open and close, are also equipped with the pump 16 and low pressure accumulator that are driven by pump motor 15
17。
The hydraulic circuit of the system of brake piping MC1 and the hydraulic circuit of the system of brake piping MC2 be likewise, so
Typically illustrate the hydraulic circuit of the system of brake piping MC2.
Circuit control valve 11 is to match somebody with somebody to be set to the valve that will be connected, block between master cylinder 4 and pressure charging valve 13f, 13r.Circuit
Control valve 11 uses when the brake pressure of vehicle being kept/released in idle stop control.Specifically, hydraulic circuit 10
It is connected with idle stop device 100, receives the open and close controlling signal of the valve exported from idle stop device 100.Circuit control valve
11 are opened and closed valve by the open and close controlling signal based on the valve exported from idle stop device 100, and the brake pressure of vehicle is protected
It holds/releases.
Inlet valve 12 is with the valve for being set to connect, block between master cylinder 4 and the Attractive side of pump 16.
Pressure charging valve 13f and pressure reducing valve 14f is adjacent with off-front wheel liquid braking device 19 and sets.Pressure charging valve 13f and pressure reducing valve
14f is used for the ABS controls of off-front wheel liquid braking device 19.Pressure charging valve 13r and pressure reducing valve 14r and left rear wheel liquid braking device 18
It is adjacent and set.Pressure charging valve 13r and pressure reducing valve 14r is used for the ABS controls of left rear wheel liquid braking device 18.
Pressure charging valve 13f is located between circuit control valve 11 and off-front wheel liquid braking device 19.Pressure charging valve 13f can be into line
Property control, can will be from the wheel brake cylinder side of 11 lateral off-front wheel liquid braking device 19 of master cylinder 4 and circuit control valve
The flow of brake fluid continuously adjusts.Pressure charging valve 13f is equipped in the state of pressure charging valve 13f closings brake fluid from off-front wheel hydraulic pressure
19 lateral master cylinder 4 of brake and 11 side of circuit control valve flowing and to its reversely the immobilising bypass for possessing check-valves
Flow path.
Pressure reducing valve 14f is only capable of, by valve standard-sized sheet or fully closed solenoid valve, being located at the wheel of off-front wheel liquid braking device 19
Between checking cylinder and accumulator 17.Pressure reducing valve 14f can be fed into the wheel system of off-front wheel liquid braking device 19 when open
Brake fluid decompression in dynamic cylinder.In addition, opening and closings of the pressure reducing valve 14f by intermittently repetitive valve, can adjust from off-front wheel hydraulic pressure
The flow for the brake fluid that the wheel brake cylinder of brake 19 is flowed to accumulator 17.
Pressure charging valve 13r is located at the pipeline for being connected circuit control valve 11 with pressure charging valve 13f and left rear wheel liquid braking device 18
Wheel brake cylinder between.Pressure charging valve 13r can Linear Control, can will be from master cylinder 4, circuit control valve 11, pressure charging valve
The braking of the wheel brake cylinder side of the lateral left rear wheel liquid braking device 18 of the wheel brake cylinder of 13f and off-front wheel liquid braking device 19
The flow of liquid continuously adjusts.Pressure charging valve 13r is equipped in the state of pressure charging valve 13r closings brake fluid from left rear wheel hydraulic braking
It flows but not to the bypass flow path for possessing check-valves of its reverse flow in 18 lateral 19 side of left rear wheel liquid braking device of device.
The pressure reducing valve 14r of left rear wheel side is only capable of, by valve standard-sized sheet or fully closed solenoid valve, being located at left rear wheel hydraulic braking
Between the wheel brake cylinder of device 18 and accumulator 17.Pressure reducing valve 14r is when opening by being fed into left rear wheel liquid braking device
Brake fluid in 18 wheel brake cylinder is supplied to accumulator 17 and can depressurized.In addition, pressure reducing valve 14r is by intermittently repeating
The opening and closing of valve can adjust the stream of the brake fluid flowed from the wheel brake cylinder of left rear wheel liquid braking device 18 to accumulator 17
Amount.
Hereinafter, each embodiment of the idle stop device of the present application is illustrated.
（1st embodiment）
Fig. 2 is the block diagram of the idle stop device of the 1st embodiment of the present application.As shown in Figure 1, the 1st embodiment party
The idle stop device 100 of formula is connected on the engine 500 of hydraulic circuit 10 and vehicle.Idle stop device 100 is sent out
The idle stop control of motivation 500.
Idle stop device 100 possesses deceleration detector（Test section）200、ESP（Electronic Stability
Program（Electronic stability program））300 and ISC（Idoling Stop Controller（Idle stop control unit））400.
Deceleration detector 200 detects the deceleration of vehicle.Detector 200 can be for example made of acceleration transducer.
Deceleration detector 200 for example detects the deceleration of vehicle when being decelerated to comprising vehicle below preset speed（1st
Deceleration）Vehicle deceleration.More particularly, the detection of deceleration detector 200 includes vehicle and is decelerated to soon to stop
When speed（Such as 3Km/h）Deceleration when following（1st deceleration）Vehicle deceleration.In addition, deceleration detector
200 are not limited to be made of acceleration transducer.For example, deceleration detector 200 or by will from detection vehicle
Speed sensor output car speed carry out time diffusion and the arithmetic unit of the deceleration of vehicle is obtained.
ESP300 is that the transverse direction for inhibiting only prevent by the driver behavior of driver when the posture disorder of vehicle is beaten
The anti-locking system of transverse direction skidding of stable posture that is sliding etc., making vehicle.ESP300 includes estimating unit 350 and braking pressure control portion
370。
Estimating unit 350 based on the deceleration detected by deceleration detector 200, obtain vehicle speed be decelerated to it is pre-
The speed first set（For example, 3Km/h）The 1st deceleration when following.More particularly, thus it is speculated that portion 350 is detected from by deceleration
In the deceleration that device 200 is sequentially output, the speed for obtaining vehicle is decelerated to preset speed（Such as 3Km/h）When following
Deceleration, as the 1st deceleration.
In addition, estimating unit 350 is based on the 1st acquired deceleration, thus it is speculated that vehicle be decelerated to preset speed with
The brake pressure of vehicle when lower.Such as numerical expression 1 based on following equation of motion of estimating unit 350, thus it is speculated that the braking of vehicle
Pressure.
［ numerical expression 1 ］
Here, FflatIt is the brake pressure of the vehicle on level land（bar）With the braking efficiency of vehicle（Nm/bar）Product.m
It is the weight of vehicle.A is the deceleration of vehicle.
That is, the braking efficiency of vehicle and the weight of vehicle are known values.Thus, thus it is speculated that portion 350 is by will be by deceleration
The deceleration that detector 200 detects is updated in a of numerical expression 1, and the brake pressure of the vehicle on level land can be obtained.As a result,
Estimating unit 350, which can speculate, is decelerated to preset speed（Such as 3Km/h）The brake pressure of vehicle when following.
Braking pressure control portion 370 is in the feelings that the brake pressure speculated by estimating unit 350 is more than preset threshold value
Under condition, the brake pressure of vehicle is kept.Specifically, braking pressure control portion 370 is in the braking deduced by estimating unit 350
Pressure be it is more than preset threshold value in the case of, to the open and close controlling signal of 10 sending valve of hydraulic circuit.Hydraulic circuit 10
By the way that circuit control valve 11 is closed, the brake pressure of vehicle is protected for open and close controlling signal based on the valve exported from ESP300
It holds.
ISC400 is preset threshold value in the brake pressure deduced by estimating unit 350（Such as 5bar, 10bar etc.
It can suitably be set according to the condition of vehicle）In the case of above, the engine 500 of vehicle is stopped.
That is, when ISC400 restarts engine 500 after idle stop, suddenly start to walk to inhibit vehicle, it is logical meeting
Cross braking moment that the brake pressure of vehicle generates than engine 500 startup when the big condition of starting torque in the case of,
Engine 500 is stopped, in addition, braking pressure control portion 370 keeps the brake pressure.
Then, illustrate by the control flow of the idle stop device execution of the 1st embodiment.Fig. 3 is filled by idle stop
Put the control flow chart of execution.
As shown in figure 3, estimating unit 350 judges whether the speed of vehicle is decelerated to below speed per hour 3Km/h（Step S101）.
If it is determined that the speed of 350 vehicle of estimating unit is not decelerated to below speed per hour 3Km/h（Step S101, it is no）, then repeatedly step
The processing of S101.
On the other hand, thus it is speculated that if it is determined that the speed of 350 vehicle of portion is decelerated to below speed per hour 3Km/h（Step S101,
It is）, then the 1st deceleration when being decelerated to below speed per hour 3Km/h is obtained（Step S102）.
Then, thus it is speculated that portion 350 is based on the 1st deceleration obtained in step s 102, thus it is speculated that the speed of vehicle is decelerated to
1st brake pressure of vehicle during below speed per hour 3Km/h（Step S103）.Specifically, thus it is speculated that portion 350 uses above-mentioned numerical expression
1 speculates brake pressure.
Then, whether the 1st brake pressure that ESP300 judgements deduce in step s 103 is preset threshold value（Example
Such as, 5bar）More than（Step S104）.If it is determined that the 1st brake pressure that ESP300 is deduced is not preset threshold value
More than（Step S104, it is no）, then processing is terminated.
On the other hand, ISC400 is to set in advance in the 1st brake pressure for being judged to being deduced by estimating unit 350 by ESP300
In the case of more than fixed threshold value（Step S104 is）, stop engine 500（Step S105）, pass through braking pressure control
Portion 370 keeps brake pressure.Specifically, braking pressure control portion 370 is by the way that the open and close controlling signal of valve is returned to hydraulic pressure
Road 10 is sent so that circuit control valve 11 becomes " closing ", and the hydraulic pressure that will act on each brake 18,19,20,21 is closed into system
In dynamic pipeline MC1, MC2, the brake pressure of each brake 18,19,20,21 is kept as a result,.In addition, ISC400 outputs are used for
The control signal for stopping engine 500.
As described above, the 1st embodiment is based on the acceleration being usually provided in vehicle（Deceleration）Test section detects
The deceleration that goes out obtains the 1st deceleration when vehicle is decelerated to below preset speed, slows down based on the acquired the 1st
Degree speculates the embodiment of the 1st brake pressure of vehicle when vehicle is decelerated to below preset speed.Thus, according to
1st embodiment, can without using detection brake fluid pressure sensor or detect brake pedal sensor of path increment etc. and
Carry out idle stop control.As a result, according to the 1st embodiment, since the various biographies used in the prior art can be not provided with
Sensor and carry out idle stop control, so as to making simple for structureization of idle stop device.
Here, the time diagram of the state for the various parts for performing vehicle when idle stop controls is illustrated using Fig. 4.Figure
4 from upper show the graph 602 for entering into state for the brake pedal 1 for representing vehicle, represent the accelerator pedal of vehicle successively
The graph 604 for entering into state, represent idle stop control state graph 606, represent engine rotating speed song
Line chart 608, represent vehicle speed graph 610, represent vehicle brake pressure graph 612, represent idle stop
The graph 620 of brakeage state in control, 622,624,626, represent timer state graph 628,
And represent the graph 630 of the state of the electric current flowed to circuit control valve 11.
During t0~t1, corresponding to entering into for brake pedal 1, as shown in graph 610,612, brake pressure increases
Add, and vehicle speed retardation.During t0~t1, the brakeage state during idle stop controls is " to await orders
State 620 ", i.e., common on-position.
Assuming that in t1, the speed of vehicle is decelerated to below speed per hour 3km/h.Here, thus it is speculated that portion 350 speculates as described above
The brake pressure of vehicle.Also, whether the brake pressure that ESP300 judgements deduce is more than preset threshold value.Here,
It is assumed that the brake pressure deduced is judged as more than preset threshold value.In the case, braking pressure control portion 370 to
Hydraulic circuit 10 is in order to circuit control valve 11 is closed and the open and close controlling signal of sending valve.Hydraulic circuit 10 such as graph 630
It is shown, by the way that electric current is made to start to flow to circuit control valve 11, circuit control valve 11 shown in FIG. 1 is controlled from "ON" to " closing "
System.As a result, as shown in graph 612, the brake pressure of vehicle（Act on pressure on the brake wheel）It is kept, idle stop control
In brakeage state become " brake pressure hold mode 622 ".
In addition, if the brake pressure for being judged to deducing is more than preset threshold value, then ICS400 outputs make hair
The control signal that motivation stops.As a result, in t2, idle stop control becomes idle stop transition as shown in graph 606
In state, in t3, the engine stop as shown in graph 608.Then, in t4, idle stop control such as graph 606
It is shown, become idle stop state.
In addition, in the state of in idle stop transition, if driver is by brake pedal as shown in graph 614
1 decontrols, then it is assumed that driver does not make the meaning that vehicle stops, by the brake pressure of holding as shown in graph 616（Make
With pressure on the brake wheel）It releases.
In addition, as shown in graph 628, in t1, by timing from being decelerated to below speed per hour 3km/h the speed of vehicle
Device counts.Also, even if the preset time that have passed through such as t1 to t5 is also not carried out idle stop control, then
As shown in graph 618, by the brake pressure of holding（The pressure of effect on the brake wheel）It releases.
On the other hand, in the state of idle stop control is performed, it is assumed that decontrol brake pedal 1 in t6 driver.
As a result, as shown in graph 606, idle stop control restarts state as engine, will hair as shown in graph 608
Motivation is restarted.
Here, brake pressure（The pressure of effect on the brake wheel）It is kept, during due to braking moment than engine start
Starting torque it is big, so the original state that vehicle is off.
Then, in t7, idle stop control becomes usual state, i.e., by the state of idle stop canceling.Braking pressure as a result,
Power control unit 370 is gradually controlled as shown in graph 630, by circuit control valve 11 shown in FIG. 1 from " closing " to "ON".Therewith,
Brakeage state in idle stop control becomes " releasing state 624 ", as shown in graph 612, brake pressure（Make
With pressure on the brake wheel）It gradually decreases.In addition, as shown in graph 608, the rotating speed of engine gradually increases.
During t7 to t8, as shown in graph 610, if the starting torque of engine becomes to compare braking moment
Greatly, then vehicle setting in motion.Then, in t8, if the driver as shown in graph 604 enters into accelerator pedal, such as
The rotating speed of such engine shown in graph 608 increases, and the speed of vehicle also increases as shown in graph 610.
In t9, if being by the control completely of circuit control valve 11 by braking pressure control portion 370 as shown in graph 630
"ON", the then brake pressure kept（The pressure of effect on the brake wheel）It is totally released, the brake in idle stop control
Operating state becomes " armed state 626 ".
（2nd embodiment）
Then, the 2nd embodiment of the present application is illustrated.The idle stop device of 2nd embodiment has with the 1st in fact
Apply the same structure of idle stop device and function of mode, in addition, it is also contemplated that vehicle stop in the state of road
The gradient and carry out idle stop control.Thus, it is omitted the description on structure in a same manner as in the first embodiment and function.
In the 2nd embodiment, deceleration detector（Test section）200 also have both the road that standby detection corresponds to vehicle traveling
The gradient in face and act on the function of the inclination detecting section of the deceleration on vehicle.That is, in vehicle parking on acclive road surface
In the case of upper, even if vehicle itself stops, also deceleration is detected due to the influence of acceleration of gravity.Deceleration detector
The deceleration that 200 detections are brought by the influence of acceleration of gravity.
Also, estimating unit 350 is after a stop of the vehicle, based on being examined in the state of stopping in vehicle by deceleration detector 200
The 2nd deceleration measured, thus it is speculated that the brake pressure of vehicle.That is, in vehicle parking in the case of acclive road surface, if set
It is θ by the angle intersected to form of the direct of travel of vertical direction and vehicle, then is equivalent to from the output of deceleration detector 200
The value of gcos θ.In addition, g is acceleration of gravity.
Estimating unit 350 speculates the brake pressure of the vehicle to stop on acclive road surface based on following numerical expression 2.
［ numerical expression 2 ］
Here, FslopeIt is the brake pressure of the vehicle on acclive road surface（bar）With the braking efficiency of vehicle（Nm/
bar）Product.M is the weight of vehicle.A ' is the deceleration of vehicle corresponding with the gcos θ exported from deceleration detector 200.
That is, the braking efficiency of vehicle and the weight of vehicle are known values.Thus, thus it is speculated that portion 350 is by will be from deceleration
The 2nd deceleration that detector 200 exports is updated in a ' of numerical expression 2, and the braking of the vehicle on acclive road surface can be obtained
Pressure.Estimating unit 350 after a stop of the vehicle, can be based on being examined by deceleration detector 200 in the state of vehicle stopping as a result,
The 2nd deceleration that measures speculates the brake pressure of vehicle.
Then, illustrate by the control flow of the idle stop device execution of the 2nd embodiment.Fig. 5 is by the 2nd embodiment
Idle stop device perform control flow chart.
As shown in figure 5, step S201~step S205 and step S101~step S105 of the 1st embodiment are similary
, so omitting detailed description.
In step S204, if it is decided that the 1st brake pressure to deduce is not more than preset threshold value（Step
S204, it is no）, then estimating unit 350 judge vehicle whether stopped（Step S206）.If it is determined that 350 vehicle of estimating unit does not have
It is stopped（Step S206, it is no）, then the repeatedly processing of step S206.
On the other hand, thus it is speculated that if it is determined that 350 vehicle of portion is not stopped（Step S206 is）, then examined from deceleration
It surveys device 200 and obtains the 2nd deceleration（a´）, i.e. road gradient（Step S207）.
Then, thus it is speculated that portion 350 is based on the 2nd deceleration obtained in step S207（a´）, i.e. road gradient, thus it is speculated that parking
In vehicle the 2nd brake pressure（Step S208）.Specifically, thus it is speculated that portion 350 speculates braking pressure using above-mentioned numerical expression 2
Power.
Then, thus it is speculated that portion 350 is by the 1st brake pressure deduced in step S203 with deducing in step S208
2nd brake pressure compares, and higher brake pressure is exported to ISC400（Step S209）.
Then, whether the brake pressure that ISC400 judgements are exported by step S209 is preset threshold value（For example,
5bar）More than（Step S210）.If it is determined that the brake pressure that ISC400 is deduced is not more than preset threshold value（Step
Rapid S210, it is no）, then terminate to handle.
On the other hand, if it is determined that the brake pressure that ISC400 is deduced is more than preset threshold value（Step
S210 is）, then stop engine 500（Step S211）.
In addition, braking pressure control portion 370 is in the situation that the brake pressure deduced is more than preset threshold value
Under, to the open and close controlling signal of 10 sending valve of hydraulic circuit.Hydraulic circuit 10 is based on the valve exported from braking pressure control portion 370
Open and close controlling signal, by the way that circuit control valve 11 is closed, the brake pressure of vehicle is kept.Specifically, brake pressure
Control unit 370 is by sending the open and close controlling signal of valve to hydraulic circuit 10 so that circuit control valve 11 will be made as " closing "
Hydraulic pressure on each brake 18,19,20,21 is closed in brake piping MC1, MC2, as a result, by each brake 18,19,
20th, 21 brake pressure is kept.In addition, ISC400 outputs are used for the control signal for stopping engine 500.
As described above, the 2nd embodiment is also being determined as in the 1st braking deduced in addition to the 1st embodiment
In the case of being controlled under pressure without idle stop, it is also considered that be subject in a state that vehicle stops on acclive road surface
The influence of acceleration of gravity, to speculate the 2nd brake pressure.It is also, bigger than preset value in the 2nd brake pressure deduced
In the case of carry out idle stop control.Thus, according to the 2nd embodiment, in addition to the effect of the 1st embodiment, in vehicle
Parking on acclive road surface in the case of, can more suitably carry out idle stop control.
Reference sign
11 circuit control valves
100 idle stop devices
200 deceleration detectors（Test section）
300 ESP
350 estimating units
370 braking pressure control portions
400 ISC（Idle stop control unit）
500 engines.
Claims (6)
1. a kind of idle stop device, which is characterized in that possess：
Test section, detects the deceleration of vehicle, and the test section is acceleration transducer or arithmetic unit, the arithmetic unit pass through by
Time diffusion is carried out from the car speed of the sensor output of the speed of detection vehicle and the deceleration of vehicle is obtained；
Estimating unit, based on the deceleration detected by above-mentioned test section, the speed for obtaining above-mentioned vehicle is decelerated to and presets
Speed below when the 1st deceleration, based on the 1st acquired deceleration, thus it is speculated that above-mentioned vehicle is decelerated to above-mentioned to be set in advance
1st brake pressure of above-mentioned vehicle when below fixed speed；
Braking pressure control portion is feelings more than preset threshold value in the 1st brake pressure deduced by above-mentioned estimating unit
Under condition, the brake pressure of above-mentioned vehicle is kept；With
Idle stop control unit is feelings more than preset threshold value in the 1st brake pressure deduced by above-mentioned estimating unit
Under condition, by the engine stop of above-mentioned vehicle；
By using the deceleration detected by above-mentioned test section, stepped on without using the sensor or detection braking of detection brake fluid pressure
The sensor of the path increment of plate and carry out idle stop control.
2. idle stop device as described in claim 1, which is characterized in that
Braking efficiency of the above-mentioned estimating unit based on above-mentioned the 1st acquired deceleration, the weight of above-mentioned vehicle and above-mentioned vehicle, pushes away
Survey the brake pressure of above-mentioned vehicle when above-mentioned vehicle is decelerated to below above-mentioned preset speed.
3. idle stop device as described in claim 1, which is characterized in that
The deceleration that above-mentioned estimating unit obtains when above-mentioned vehicle is decelerated to below speed when soon stopping subtracts as the above-mentioned 1st
Speed, based on the 1st acquired deceleration, thus it is speculated that above-mentioned vehicle when above-mentioned vehicle is decelerated to below speed when soon stopping
Brake pressure.
4. idle stop device as described in claim 1, which is characterized in that
Inclination detecting section is also equipped with, the inclination detecting section detection corresponds to the gradient on the road surface of above-mentioned vehicle traveling and acts on
Deceleration on above-mentioned vehicle；
Above-mentioned estimating unit is after the stopping of above-mentioned vehicle, based on being detected in the state of the stopping of above-mentioned vehicle by above-mentioned inclination detecting section
The 2nd deceleration arrived speculates the 2nd brake pressure of above-mentioned vehicle, and the 2nd brake pressure deduced and the above-mentioned 1st braking are pressed
Power compares, and exports the brake pressure of the higher person；
Above-mentioned braking pressure control portion is situation more than preset threshold value in the brake pressure exported from above-mentioned estimating unit
Under, the brake pressure of above-mentioned vehicle is kept；
Above-mentioned idle stop control unit is situation more than preset threshold value in the brake pressure exported from above-mentioned estimating unit
Under, by the engine stop of above-mentioned vehicle.
5. idle stop device as claimed in claim 4, which is characterized in that
Above-mentioned estimating unit is after the stopping of above-mentioned vehicle, the system based on above-mentioned 2nd deceleration, the weight of above-mentioned vehicle and above-mentioned vehicle
Efficiency of movement, thus it is speculated that the brake pressure of above-mentioned vehicle.
6. such as idle stop device according to any one of claims 1 to 5, which is characterized in that
Above-mentioned braking pressure control portion is closed by the valve that will be located in brake piping, and the brake pressure of above-mentioned vehicle is kept,
The brake piping will be as between the master cylinder of the occurring source of the brake fluid pressure of above-mentioned vehicle and the wheel brake cylinder of wheel
Connection.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-242872 | 2012-11-02 | ||
| JP2012242872 | 2012-11-02 | ||
| PCT/JP2013/079130 WO2014069399A1 (en) | 2012-11-02 | 2013-10-28 | Idle-stop device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104870786A CN104870786A (en) | 2015-08-26 |
| CN104870786B true CN104870786B (en) | 2018-06-01 |
Family
ID=
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102166961A (en) * | 2011-03-31 | 2011-08-31 | 北京汽车新能源汽车有限公司 | AT (automatic transmission)-based pure electric automobile brake energy recovery control system and method thereof |
| CN102431530A (en) * | 2011-10-28 | 2012-05-02 | 吉林大学 | Intelligent parking braking and auxiliary starting control method |
| CN102444483A (en) * | 2010-09-30 | 2012-05-09 | 株式会社电装 | Engine control apparatus |
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102444483A (en) * | 2010-09-30 | 2012-05-09 | 株式会社电装 | Engine control apparatus |
| CN102166961A (en) * | 2011-03-31 | 2011-08-31 | 北京汽车新能源汽车有限公司 | AT (automatic transmission)-based pure electric automobile brake energy recovery control system and method thereof |
| CN102431530A (en) * | 2011-10-28 | 2012-05-02 | 吉林大学 | Intelligent parking braking and auxiliary starting control method |
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