CN108327698A - A kind of air pump system control method - Google Patents

A kind of air pump system control method Download PDF

Info

Publication number
CN108327698A
CN108327698A CN201810058005.8A CN201810058005A CN108327698A CN 108327698 A CN108327698 A CN 108327698A CN 201810058005 A CN201810058005 A CN 201810058005A CN 108327698 A CN108327698 A CN 108327698A
Authority
CN
China
Prior art keywords
air pump
control
air
value
vcu
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810058005.8A
Other languages
Chinese (zh)
Inventor
黄俊平
李阿妮
王兴刚
邓志田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Inner Mongolia Green Mountain Motor Co Ltd
Original Assignee
Inner Mongolia Green Mountain Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Inner Mongolia Green Mountain Motor Co Ltd filed Critical Inner Mongolia Green Mountain Motor Co Ltd
Priority to CN201810058005.8A priority Critical patent/CN108327698A/en
Publication of CN108327698A publication Critical patent/CN108327698A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18Safety devices; Monitoring
    • B60T17/22Devices for monitoring or checking brake systems; Signal devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous

Abstract

The invention discloses a kind of air pump system control methods, it is related to air pump technical field, it by real-time collection vehicle atmospheric pressure value during air pump inflates operation with the air pressure upper limit value of default by being compared, for preventing from leading to fault pervasion due to the failure of pressure switch in practical work process, in addition the activity duration that this programme also also inflates to air pump by using whole-control system VCU and the air pump of default are inflated the time and are compared, to prevent due to air pipe gas leakage and air pump persistently inflates and in turn results in damage, driver's air pipe can also be reminded to break down simultaneously, it prevents that miscellaneous equipment is caused to damage.

Description

A kind of air pump system control method
Technical field
The present invention relates to air pump technical fields, and in particular to a kind of air pump system control method.
Background technology
It is existing vehicle compressed-air brake control system structural schematic diagram shown in attached drawing 1.Existing vehicle gas braking control System processed includes with lower component:Low-voltage power supply, high-voltage suppling power, entire car controller VCU, instrument, the control of DCAC air pumps Device, air pump motor, air compressor, air dryer and baroceptor etc..It is existing tradition shown in attached drawing 2 Air pump control flow block diagram.Existing air pump system control method is to show vehicle air value by instrument to collect, together When atmospheric pressure value is sent to by whole-control system VCU by CAN bus, when collected atmospheric pressure value is less than VCU inner setting values When, VCU will send instructions to DCAC controllers and air pump motor is driven to start to inflate, and be air-dried when internal pressure of the tank reaches After the pressure release threshold values of device, air dryer can be exhausted, and trigger the overturning of pressure switch signal, and VCU is connected to pressure switch letter After number, sends halt command and give DCAC controllers, stop inflating.Existing above-mentioned air pump system control method its be primarily present with Lower defect:1) it is, to reduce cost, the air pump motor of mainstream is all without temperature sensor or temperature detect switch (TDS) in the market, therefore encounters gas Pipeline gas leakage and driver it is not found in the case of, air pump will continue working, work long hours may result in air pump motor burning It is bad;2), baroceptor failure or air dryer pressure switch fail but lack corresponding safeguard measure and may all cause Fault pervasion damages miscellaneous equipment.
Invention content
In view of the deficiencies in the prior art, the purpose of the present invention is to provide a kind of air pump system control methods, should Air pump system control method can effectively ensure that whole system reliability service, can effectively be avoided in a certain component malfunction Fault pervasion, while driver can be assisted to go discharge failure again.
To achieve the above object, the technical solution adopted by the present invention is as follows:
A kind of air pump system control method, includes the following steps:
S1, air pump entry condition:Whole-control system VCU is by the air pump work of collected vehicle air value and default Make lower limit atmospheric pressure value to be compared, if collected vehicle air value is less than the air pump lower work threshold atmospheric pressure value of default, Then air pump, which proceeds by, inflates work, and otherwise air pump stopping is inflated;
S2, air pump stop condition (one):During air pump inflate operation, let out if internal pressure of the tank reaches After air valve value, it can otherwise continue to inflate by triggering pressure switch and air pump stopping being made to inflate;
S3, air pump stop condition (two):During operation is inflated in air pump air inlet, whole-control system VCU is adopted in real time Collection vehicle air value is compared with the air pressure upper limit value of default, if collected vehicle air value is higher than default Air pressure upper limit value, then air pump stopping inflates and alarms, and otherwise air pump continues to inflate, and wherein the air pressure upper limit value is higher than dry The popping pressure value of dry device gas bleeder valve.
Further, in step s3, during air pump inflate operation, whole-control system VCU is also to air pump The activity duration inflated and the air pump of default are inflated the time and are compared, if air pump inflates the activity duration and is more than and is The air pump of system setting is inflated the time, then air pump stopping, which is inflated, operation and alarms, and otherwise air pump continues to inflate operation.
Further, collected vehicle air value is compared by whole-control system VCU with the digital value of default Analysis, the atmospheric pressure value can directly sample calculating by the AD sampling channels of VCU itself, can also be adopted by the channels AD of instrument itself Sample calculates digital value and then is sent to whole-control system VCU by CAN bus.
Further, whole-control system VCU inflate work by sending out enable signal to control air pump.
Further, after vehicle for the first time upper low tension, all electronic control systems on vehicle all need to carry out self-test, To ensure each electronic equipment normal work.
Further, whole-control system VCU will show pressure switch failure in step s3 in whole-control system instrument Information.
Further, whole-control system VCU will show air pipe warning message in whole-control system instrument.
Compared with prior art, the advantageous effects that this programme has are:This programme inflates the process of operation in air pump In be compared with the air pressure upper limit value of default by real-time collection vehicle atmospheric pressure value, for preventing in real work Fault pervasion is led to due to the failure of pressure switch in journey, this programme is also also right by using whole-control system VCU in addition The activity duration that air pump is inflated and the air pump of default are inflated the time and are compared, to prevent due to air pipe gas leakage and Air pump, which is persistently inflated, in turn results in damage, while potential failure is reported to driver, and driver or maintenance personal is assisted to investigate phase Close equipment.
Description of the drawings
Fig. 1 is existing vehicle compressed-air brake control system structural schematic diagram.
Fig. 2 is existing conventional air pumps control flow block diagram.
Fig. 3 is the air pump system control method square frame principle schematic diagram in the present invention.
Fig. 4 is the air pump system control flow square frame principle schematic diagram in the present invention.
Specific implementation mode
The present invention is described in further detail with specific implementation mode with reference to the accompanying drawings of the specification.
This programme is that it exists when baroceptor failure or is air-dried for existing air pump system control method The failure of device pressure switch lacks the problem of corresponding safeguard measure may cause fault pervasion, damage miscellaneous equipment, and propose A kind of air pump system control method, which can effectively ensure that whole system reliability service, in a certain portion Part can effectively avoid fault pervasion when breaking down, while driver can be assisted to go discharge failure again.
It is the air pump system control method square frame principle schematic diagram in the present embodiment referring to attached drawing 3.Gas in the present embodiment Pumping system control method includes the following steps:
S1, air pump entry condition:Whole-control system VCU is by the air pump work of collected vehicle air value and default Make lower limit atmospheric pressure value to be compared, if collected vehicle air value is less than the air pump lower work threshold atmospheric pressure value of default, Then air pump, which proceeds by, inflates work, and otherwise air pump stopping is inflated;
During the work time, the instrument on vehicle to the preceding bridge baroceptor that is located at before vehicle on bridge and rear axle and Atmospheric pressure value on rear axle baroceptor is acquired, and collected atmospheric pressure value is shown, simultaneously also Collected above-mentioned atmospheric pressure value is sent to whole-control system VCU by CAN bus, when the atmospheric pressure value of acquisition is low When the air pump lower work threshold atmospheric pressure value set in whole-control system VCU, whole-control system VCU then sends instructions to DCAC Controller simultaneously drives air pump motor to bring into operation, and inflate operation;If collected above-mentioned atmospheric pressure value is more than vehicle When the air pump lower work threshold atmospheric pressure value set in control system VCU, then air pump is without inflating operation.It should be noted that this Above-mentioned collected atmospheric pressure value in embodiment and the air pump lower work threshold atmospheric pressure value that is set in whole-control system VCU into Row comparison procedure, to be obtained after the AD sampling channels calculating conversion by collected sensor atmospheric pressure value by microcontroller in instrument Digital value, and the numerical value obtained after the calculating is converted is sent to whole-control system VCU, VCU by CAN bus and will receive Atmospheric pressure value be compared with the digital value of default, finally carry out discriminatory analysis.Such as in practice, whole-control system The transformed digital value of atmospheric pressure value that the air pump lower work threshold atmospheric pressure value that VCU is set is arrived as 0.95Mpa, when instrument to collect >= When 0.95, whole-control system VCU meeting trigger protections, control DCAC controllers so that air pump motor is out of service;It needs herein Illustrate, in actual operation, the baroceptor on preceding bridge and rear axle can also be adopted by whole-control system VCU Atmospheric pressure value is sent to instrument by CAN bus by whole-control system VCU again and shown by collection, the atmospheric pressure value after acquisition Show;
S2, air pump stop condition (one):During air pump inflate operation, let out if internal pressure of the tank reaches After air valve value, it can otherwise continue to inflate by triggering pressure switch and air pump stopping being made to inflate;
During air pump proceeds by and inflates operation, in the state persistently risen, therefore internal pressure of the tank is Pressure value in need in gas tank is monitored, and to prevent, pressure is excessive and leads to contingency.The present embodiment be Air dryer is provided in gas tank, during the work time after internal pressure of the tank reaches the discouraged threshold values of air dryer, Air dryer can be exhausted, and trigger the reversion of pressure switch signal, and whole-control system VCU receives pressure switch signal Afterwards, can send halt command gives DCAC controllers, DCAC controllers to control air pump stopping in turn and inflate;
S3, air pump stop condition (two):During operation is inflated in air pump air inlet, whole-control system VCU is adopted in real time Collection vehicle air value is compared with the air pressure upper limit value of default, if collected vehicle air value is higher than default Air pressure upper limit value, then air pump stopping inflates and alarms, and otherwise air pump continues to inflate, and wherein the air pressure upper limit value is higher than dry The popping pressure value of dry device gas bleeder valve;
The present embodiment is considered in entire air pump control system in practical work process, when for triggering reverse signal Pressure switch breaks down or other components cause air pump that cannot be stopped in time when something goes wrong, and extensive failure occurs Consequence under, propose it is a kind of is compared come an air pressure upper limit value with default by real-time collection vehicle atmospheric pressure value, After taking this kind of technological means, since vehicle air value is that acquisition (can also be segmented certainly in real process and be adopted in real time Collection, however, it will be understood that the time interval of segmentation is smaller, to ensure to start vehicle air value occur beyond normal Can be found in time in the case of range), therefore when vehicle air value exceeds normal range (NR), whole-control system VCU can It takes measures at once, control air pump is stopped.In actual operation, the air pump work set in whole-control system VCU Make lower limit atmospheric pressure value and air pressure upper limit value is all designed according to actual vehicle working condition, can be surveyed according to previous sample car Try reference frame of the structure as follow-up formal vehicle.In work when collected vehicle air value is higher than the air pressure of default Upper limit value, then air pump stopping inflate and alarm, and whole-control system VCU stops work in control DCAC controllers control air pump While work, pressure switch fault message is shown in instrument.
In the present embodiment, it is contemplated that if vehicle is in the process of moving, gas leakage occurs for the air pipe on vehicle, and gas leakage is compared If serious, exhaust conditions can be not achieved in air dryer for a long time, and halt condition is also not achieved in atmospheric pressure value, in this way, beating Air pump motor will continue working, because air pump motor lack temperature protection, Gu continuous service overlong time may then burn out gas Pump motor.This present embodiment is increased in entire air pump control system, time judgement is inflated by air pump to be directed in tracheae Road can generate reminding effect when leaking to driver, while can also be effectively protected DCAC controllers and air pump system.This During the measure that embodiment is taken is S4, air pump inflate operation in step s3, whole-control system VCU is also to gas It pumps activity duration for being inflated and the air pump of default and inflates the time and be compared, if air pump is inflated the activity duration and is more than The air pump of default is inflated the time, then air pump stopping, which is inflated, operation and alarms, and otherwise air pump continues to inflate operation. It should be noted that inflate the time setting value be according to the capacity of the power of air pump and gas tank it is practical debug depending on.
At work, the working time of inflating of air pump is by the DCAC enable signals triggered and collected air pressure pressure Depending on force value variation.After whole-control system VCU receives the atmospheric pressure value signal less than default, full-vehicle control system System VCU sends message instruction or output hardware enable signal gives DCAC controllers, DCAC controllers to export enable signal in turn, drives Pump of taking offence starts to inflate work.If air pressure is made, whole-control system VCU receives this signal and can be sent out to DCAC controllers Go out stopping and inflate instruction, DCAC controllers just stop exporting enable signal at this time, and air pump is stopped.In the present embodiment, make Energy signal with 0 and 1 by indicating two states, and 1 indicates high level, and 0 indicates that low level, acquiescence high level are effective.In work, It inflates the time more than the air pump of default when air pump inflates the activity duration, then air pump stopping, which is inflated, operation and alarms, whole Vehicle control VCU shows air pipe alarm signal while control DCAC controllers control air pump is stopped in instrument Breath.
It is air pump system control flow square frame principle schematic diagram in the present embodiment shown in reference attached drawing 4.It is entire Operation principle and flow are explained above-mentioned, are just not repeated to describe herein.And it should be noted that in entire gas During pump control system brings into operation, each control circuit starts low pressure after the power is turned in automobiles, also needs all to vehicle Electronic control system carries out ECU self-tests, such as entire car controller VCU and single-chip computer control system MCU electronic control systems carry out Self-test.
In conclusion the present embodiment be by multiple measure come realize to air pump motor protection with realize air pipe can By operation.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technology Within, then the present invention is also intended to include these modifications and variations.

Claims (7)

1. a kind of air pump system control method, which is characterized in that include the following steps:
S1, air pump entry condition:Under whole-control system VCU works the air pump of collected vehicle air value and default Limit atmospheric pressure value is compared, if collected vehicle air value is less than the air pump lower work threshold atmospheric pressure value of default, gas Pump, which proceeds by, inflates work, and otherwise air pump stopping is inflated;
S2, air pump stop condition (one):During air pump inflate operation, if internal pressure of the tank reaches gas bleeder valve After value, it can otherwise continue to inflate by triggering pressure switch and air pump stopping being made to inflate;
S3, air pump stop condition (two):During operation is inflated in air pump air inlet, the real-time collecting vehicles of whole-control system VCU Atmospheric pressure value is compared with the air pressure upper limit value of default, if collected vehicle air value is higher than the gas of default Upper limit value is pressed, then air pump stopping inflates and alarms, and otherwise air pump continues to inflate, and wherein the air pressure upper limit value is higher than drier The popping pressure value of gas bleeder valve.
2. a kind of air pump system control method according to claim 1, it is characterised in that:In step s3, air pump into Row is inflated during operation, the air pump of activity duration and default that whole-control system VCU also inflates to air pump Inflating the time is compared, if air pump inflates the activity duration and inflates the time more than the air pump of default, air pump stopping is beaten Gas operation is simultaneously alarmed, and otherwise air pump continues to inflate operation.
3. a kind of air pump system control method according to claim 1, it is characterised in that:Whole-control system VCU will be adopted The vehicle air value collected is compared analysis with the digital value of default, which can be sampled by the AD of VCU itself Path computation is converted to digital value, also can be total by CAN by the AD channel samples of instrument itself calculate digital value Line is sent to whole-control system VCU.
4. a kind of air pump system control method according to claim 1, it is characterised in that:Whole-control system VCU passes through It sends out enable signal and inflate work to control air pump.
5. a kind of air pump system control method according to claim 1, it is characterised in that:In vehicle first time upper low-voltage Afterwards, the electronic control system used on vehicle all needs to carry out self-test, to ensure that each electronic equipment works normally.
6. a kind of air pump system control method according to claim 1, it is characterised in that:Full-vehicle control system in step s3 System VCU will show pressure switch fault message in whole-control system instrument.
7. a kind of air pump system control method according to claim 2, it is characterised in that:Whole-control system VCU will be whole Air pipe warning message is shown in vehicle control instrument.
CN201810058005.8A 2018-01-22 2018-01-22 A kind of air pump system control method Pending CN108327698A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810058005.8A CN108327698A (en) 2018-01-22 2018-01-22 A kind of air pump system control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810058005.8A CN108327698A (en) 2018-01-22 2018-01-22 A kind of air pump system control method

Publications (1)

Publication Number Publication Date
CN108327698A true CN108327698A (en) 2018-07-27

Family

ID=62925428

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810058005.8A Pending CN108327698A (en) 2018-01-22 2018-01-22 A kind of air pump system control method

Country Status (1)

Country Link
CN (1) CN108327698A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109334648A (en) * 2018-09-26 2019-02-15 潍柴动力股份有限公司 A kind of control method and system of new-energy automobile air pump
CN110173420A (en) * 2019-06-30 2019-08-27 潍柴动力股份有限公司 The air pump fault detection method and relevant apparatus of electric vehicle

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100005796A1 (en) * 2006-07-06 2010-01-14 Continental Teves Ag & Co. Ohg Method for Creating Low Pressure In A Brake Activation Device of a Motor Vehicle Brake System
CN202463506U (en) * 2012-03-19 2012-10-03 北京柯布克汽车技术有限公司 Electrically controlled protection device for electric air pump of automobile air suspension
CN103359098A (en) * 2012-03-27 2013-10-23 北汽福田汽车股份有限公司 Electromobile control method
CN103600709A (en) * 2013-11-21 2014-02-26 安徽安凯汽车股份有限公司 Fuzzy control method of inflating pump for electric buses
CN104595167A (en) * 2014-12-26 2015-05-06 金龙联合汽车工业(苏州)有限公司 Blast pump control method for pure electric automobile
CN205769258U (en) * 2016-05-21 2016-12-07 安徽安凯汽车股份有限公司 A kind of duplicate protection closed-loop control device of electric motor coach inflating pump

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100005796A1 (en) * 2006-07-06 2010-01-14 Continental Teves Ag & Co. Ohg Method for Creating Low Pressure In A Brake Activation Device of a Motor Vehicle Brake System
CN202463506U (en) * 2012-03-19 2012-10-03 北京柯布克汽车技术有限公司 Electrically controlled protection device for electric air pump of automobile air suspension
CN103359098A (en) * 2012-03-27 2013-10-23 北汽福田汽车股份有限公司 Electromobile control method
CN103600709A (en) * 2013-11-21 2014-02-26 安徽安凯汽车股份有限公司 Fuzzy control method of inflating pump for electric buses
CN104595167A (en) * 2014-12-26 2015-05-06 金龙联合汽车工业(苏州)有限公司 Blast pump control method for pure electric automobile
CN205769258U (en) * 2016-05-21 2016-12-07 安徽安凯汽车股份有限公司 A kind of duplicate protection closed-loop control device of electric motor coach inflating pump

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109334648A (en) * 2018-09-26 2019-02-15 潍柴动力股份有限公司 A kind of control method and system of new-energy automobile air pump
CN110173420A (en) * 2019-06-30 2019-08-27 潍柴动力股份有限公司 The air pump fault detection method and relevant apparatus of electric vehicle
CN110173420B (en) * 2019-06-30 2020-11-20 潍柴动力股份有限公司 Air pump fault detection method of electric vehicle and related device

Similar Documents

Publication Publication Date Title
CN108327698A (en) A kind of air pump system control method
CN104118420B (en) A kind of vacuum boosting braking system for pure electric vehicle method for diagnosing faults
CN106812689B (en) Motorized vacuum method for controlling pump and control device
CN101830214B (en) Control module, control method, brake vacuum servo device and electric automobile
CN104477158A (en) Monitoring method for electric vehicle electric vacuum pump
JP2588479B2 (en) Method for monitoring the function of a device performing an automatic braking process
CN201670225U (en) Control module, brake vacuum boosting device and electric automobile
CN104260718B (en) A kind of brakes realizing electric vacuum pump self-protection function and control method
CN107120262B (en) A kind of electric compressor control strategy and method for diagnosing faults
CN103318165A (en) Vacuum assistance system detection method, vacuum assistance system detection system, electromobile and failure detection method
CN107117155A (en) Fault detection method, device and the automobile of the force aid system for braking of electric automobile
CN104589932B (en) A kind of indirect type tire pressure monitoring method and device
KR970065269A (en) Automotive anti-lock brake control system
WO2016011816A1 (en) Heatless adsorption air dryer control method and device
CN104870280B (en) Supervising device for the method checked seperating vale and for seperating vale
CN102128710B (en) Air leakage testing device and method for air inlet pipe of turbo supercharged engine
CN203440859U (en) Intelligent fault diagnosis and monitor system of underground carry-scraper
CN206035816U (en) [electric] motor coach air generation system controller
CN103670722A (en) Method and system for monitoring exhaust brake state of engine
CN106394540A (en) Intelligent brake boosting control system and method of electric vehicle
CN2860965Y (en) Train safety braking alarm device
CN104269813A (en) Electronic-control automobile actuator fault diagnosis and fault-tolerance control method
CN111764991A (en) Diagnostic device and diagnostic method for removing fault of particulate matter trap
JP2007223589A (en) Method and device for monitoring vehicle hydraulic brake system
CN204904082U (en) Regulator response characteristic detection device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination