CN107860588B - Inertia roller beds Examining Method of Automobile Brake Capability - Google Patents

Inertia roller beds Examining Method of Automobile Brake Capability Download PDF

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Publication number
CN107860588B
CN107860588B CN201711094982.5A CN201711094982A CN107860588B CN 107860588 B CN107860588 B CN 107860588B CN 201711094982 A CN201711094982 A CN 201711094982A CN 107860588 B CN107860588 B CN 107860588B
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wheel
speed
resistance
roller
brake
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CN107860588A (en
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吴明
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M17/00Testing of vehicles
    • G01M17/007Wheeled or endless-tracked vehicles
    • G01M17/0072Wheeled or endless-tracked vehicles the wheels of the vehicle co-operating with rotatable rolls
    • G01M17/0074Details, e.g. roller construction, vehicle restraining devices

Abstract

Inertia roller beds Examining Method of Automobile Brake Capability, the equivalent inertia M and resistance fi and wheel equivalent inertia G of known every side platform frame, when detecting non-driven wheel, it is powered off after motor frequency conversion driving roller to suitable speed, measure the speed in left and right rack roller moderating process and time, calculate separately each speed point deceleration and system resistance of two racks, subtracting fi is Wheel resistance, when detecting drive shaft, without motor driven, bottom gear drives accelerator releasing after roller to regulation speed to hang neutral gear, similarly measures Wheel resistance with non-driven wheel;Then the prompt of regulation speed is dropped to speed step on foot brake, service braking pedal is floored, measure speed and the time of left and right rack roller synchronization, calculate separately each speed point deceleration and system row cart brake force, subtracting fi is wheel brake power, when the slip rate of any side rack is more than or equal to regulation slip rate, driver loosens the brake by prompt, similarly measures wheel parking brake force.

Description

Inertia roller beds Examining Method of Automobile Brake Capability
Technical field
Inertia roller beds Examining Method of Automobile Brake Capability is automobile in the roller beds equipped with inertial flywheel, with The equivalent inertia of rack and automobile is load load, and the method for detecting automobile brake perfrmance belongs to car consumption credit method Technical field.
Background technique
The braking ability of existing automobile, dynamic property, quality, speedometer detection, be respectively brake platform, chassis dynamometer, It is detected on Platform balance for shaft weight, speed platform, detection device is more, and occupied ground is big, price, suitable for detecting the more automotive check of vehicle It stands, but is not suitable for the quality inspection that the less vehicle complete maintenance of Auto repair shop is completed.In easy inertia roller beds Dynamic property, quality, speedometer a tractor serves several purposes, are further added by detection braking ability, are greatly improved cost performance.
Summary of the invention
Inertia roller beds Examining Method of Automobile Brake Capability is the detection automobile brake perfrmance in inertia roller beds Method, the structure of inertia roller beds is similar with existing anti-force type drum braking platform structure division, mainly has with lower component group At: left and right horse structure is symmetrically the same, is mounted on same body, and for every side platform frame there are two roller, front roll and back roll are logical Cross 1: 1 joint transmission of chain conveyer;Speed probe is installed on the axis of roller inner end, measures cylinder surface linear velocity, is sampled left and right The automobile's instant velocity of rack sensor synchronization;Speed changer is installed on the axis of roller outer end, using roller shaft end as input terminal, is become Fast device is raising speed, and transmission output couples one end of inertial flywheel, and raising speed can reduce flywheel dimension, and the equivalent for improving flywheel is used Amount;The other end connection one of flywheel is counter to drag motor, and when non-driven wheel detection brake force, variable-frequency motor drives flywheel, becomes It powers off after fast device, roller, vehicle wheel rotation to certain speed, when drive shaft wheel detection brake force, drags it is not necessary that motor is counter;Two rollers Centre is equipped with a lifting supporting plate, and supporting plate is mounted below weighing sensor, and supporting plate is in lifting shape before wheel drives into rack State weighs up wheel weight and axis weight when wheel stops being scheduled on supporting plate, and then supporting plate drops to bottom detection braking ability, after having detected Supporting plate rises, and vehicle is driven out to rack;It is also equipped with the lesser third roller of a diameter and speed probe among two rollers, works as inspection When surveying braking ability, third roller is pressed in measurement wheel surface vehicle velocity V 1 on wheel, and the roller speed V2 of synchronization is calculated same Slip rate δ=(V1-V2)/V2 of one moment wheel surface vehicle velocity V, 1 opposing roller vehicle velocity V 2, δ are selected in (0.1~0.6) range Select, when any side bench detection slip rate be greater than δ, control issue wheel will locking warning note, driver pine driving system Dynamic pedal, in order to avoid seriously damage wheel surface;The resistance fi of unilateral platform system equivalent inertia M and each speed point is known solid Definite value, detection axle rotating member equivalent inertia are mainly the equivalent inertia G of wheel, can try measurement by platform or count various vehicles The vehicle wheel rotation part equivalent inertia of type and the functional relation of wheel diameter, units/kg can calculate G according to wheel diameter and quantity.
Inertia roller beds Examining Method of Automobile Brake Capability is with the equivalent inertia of rack and automobile for load load, Detect a kind of method of automobile brake perfrmance, it is characterised in that: the equivalent inertia M and each speed point resistance fi of known every side platform frame And vehicle wheel rotation part equivalent inertia G, non-driven wheel stop being scheduled on supporting plate, weigh up wheel quality rear supporting plate decline, motor frequency conversion It is powered off after driving roller and vehicle wheel rotation to suitable speed, roller slows down under system resistance effect, measures left and right rack roller The speed of synchronization and time calculate separately deceleration Ji and system resistance Ji × (M+G) of each speed point of two racks, subtract Removing the Frame resistance fi of identical speed point is Wheel resistance, when detecting drive shaft, is not necessarily to motor driven, bottom gear driving rolling Accelerator releasing hangs neutral gear after cylinder to regulation speed, similarly measures Wheel resistance with non-driven wheel;Then rule are dropped to speed Determine speed prompt and step on foot brake, service braking pedal is floored, measures speed and the time of left and right rack roller synchronization, Each speed point deceleration Ai and system row cart brake force Ai × (M+G) for calculating separately left and right rack, subtract Frame resistance fi i.e. For wheel brake power, when the slip rate of any side rack is more than or equal to regulation slip rate, automatic sending wheel will locking Warning note, driver unclamps service braking pedal or quickly unclamps and brake pedal unclamps again afterwards several times steps on back and forth Plate;Without measuring Wheel resistance when detecting the parking brake force of parking axis, parking braking is operated, similarly measuring system parking system Power, subtracting Frame resistance fi is wheel parking brake force;Or ignore the influence setting G=0 of G to calculate, it is advised by standard Model, computer automatic sampling calculate blocking wheel rate, braking ratio per axle, axis brake imbalance rate, vehicle braking ratio, parking braking Rate.
The left and right wheels brake force of compact car hydraulic braking starts that action time difference is smaller, and brake force rate of rise is larger, It can use regulation slip rate less than normal, large car air-pressure brake can use regulation slip rate bigger than normal, and driver quickly unclamps and steps on Brake pedal unclamps again pedal afterwards several times back and forth, can avoid another side rack and does not detect maximum wheel brake force.
In order to detect wheel maximum braking force, it is ensured that active braking time, detection time will be relatively larger than wheel braking force Rise time avoids the roller in not up to detection wheel maximum braking force from just stopping, and the regulation speed of prompt can be solid Definite value, or can also determine that the axis again the big again by the axis of examined vehicle, provide that speed is accordingly higher.Multiaxle trucks detection When, to avoid wheel from reducing the adhesion weight of roller, rack, which can be fixedly mounted, makes front roll Up Highway UHW be higher than level land.
Specific embodiment
By taking a two axis lorries detect as an example, to illustrate the specific reality of inertia roller beds Examining Method of Automobile Brake Capability Mode is applied, rear axle is drive shaft and parking axis.
The relevant parameter of examined automobile is inputted computer, it is known that M, fi, G, automobile front axle, which is sailed, to be stopped to determine in lifting supporting plate, Two racks claim two-wheeled to weigh and obtain front axle weight, and lifting supporting plate drops to bottom, and third roller is pressed on wheel and is driven by wheel Rotation, the third roller speed of speed probe measurement are vehicle wheel vehicle speeds, and computer can determine regulation speed again according to axis And slip rate, or simplify regulation speed and slip rate is unrelated with axis weight as fixed value, motor frequency conversion driving roller and vehicle Wheel powers off after turning to suitable speed, and suitable speed is usually to provide that speed adds the speed Δ V of Wheel resistance detection, roller System resistance effect under slow down, the both sides rack sampling period be 0.01 second, measure both sides rack synchronization speed and when Between, each speed point deceleration Ji and system resistance Ji × (M+G) of both sides rack is calculated separately, the rack of identical speed point is subtracted Resistance fi is Wheel resistance, when speed drops to regulation speed, prompts to step on foot brake, service braking pedal is stepped on Bottom measures speed and the time of left and right rack roller synchronization, calculates separately each speed point deceleration Ai and system row cart system Power Ai × (M+G), the Frame resistance fi for subtracting identical speed point is wheel brake power, when the surveyed cunning of any side rack Shifting rate is more than or equal to regulation slip rate, it is automatic issue wheel will locking warning note, driver loosens the brake or fastly Speed unclamps and steps on pedal unclamps again pedal afterwards several times back and forth, and after braking forces measuring is complete, lifting supporting plate rises to uppermost position in fig-ure, preceding Wheel is driven out to rack.
It is fixed that rear-wheel stops in lifting supporting plate, and two-wheeled is claimed to weigh and obtain rear axle weight, and lifting supporting plate drops to bottom, is not necessarily to motor It is counter to drag, after hanging up gear driving roller speed to the suitable speed of prompt, neutral gear art skating is hung, it is then same with preceding shaft detection Reason measures Wheel resistance and wheel brake power.Without measuring Wheel resistance when detecting the parking brake force of parking axis, Parking braking is operated, similarly measuring system parking brake force, subtracting Frame resistance fi is wheel parking brake force.Or ignore The influence of G sets G=0 to calculate, and calculates blocking wheel rate, braking ratio per axle, vehicle system by standard criterion computer automatic sampling Dynamic rate, axis brake imbalance rate, parking braking rate.
Inertia roller beds Examining Method of Automobile Brake Capability, detection is quick, can be in detection dynamic property, weighing, speed Braking ability is detected in the inertia roller beds of table a tractor serves several purposes, greatly improves the cost performance of equipment.

Claims (1)

1. inertia roller beds Examining Method of Automobile Brake Capability is with the equivalent inertia of rack and automobile for load load, inspection Survey automobile brake perfrmance a kind of method, it is characterised in that: the equivalent inertia M and each speed point resistance fi of known every side platform frame with And vehicle wheel rotation part equivalent inertia G, non-driven wheel stop being scheduled on supporting plate, weigh up wheel quality rear supporting plate decline, motor frequency conversion drives It is powered off after dynamic roller and vehicle wheel rotation to suitable speed, roller slows down under system resistance effect, and measurement left and right rack roller is same The speed at one moment and time calculate separately deceleration Ji and system resistance Ji × (M+G) of each speed point of two racks, subtract The Frame resistance fi of identical speed point is Wheel resistance, when detecting drive shaft, is not necessarily to motor driven, bottom gear drives roller Accelerator releasing hangs neutral gear after to regulation speed, similarly measures Wheel resistance with non-driven wheel;Then regulation is dropped to speed Foot brake is stepped in speed prompt, and service braking pedal is floored, and measures speed and the time of left and right rack roller synchronization, point Not Ji Suan left and right rack each speed point deceleration Ai and system row cart brake force Ai × (M+G), subtracting Frame resistance fi is Wheel brake power, when the slip rate of any side rack is more than or equal to regulation slip rate, the automatic wheel that issues will locking Warning note, driver, which unclamps service braking pedal or quickly unclamps to unclamp again afterwards several times back and forth with brake pedal, to step on Plate;Without measuring Wheel resistance when detecting the parking brake force of parking axis, parking braking is operated, similarly measuring system parking system Power, subtracting Frame resistance fi is wheel parking brake force.
CN201711094982.5A 2017-11-03 2017-11-03 Inertia roller beds Examining Method of Automobile Brake Capability Active CN107860588B (en)

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CN201711094982.5A CN107860588B (en) 2017-11-03 2017-11-03 Inertia roller beds Examining Method of Automobile Brake Capability

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CN201711094982.5A CN107860588B (en) 2017-11-03 2017-11-03 Inertia roller beds Examining Method of Automobile Brake Capability

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110567735B (en) * 2019-09-21 2021-06-11 吴明 Method for detecting maximum process difference of braking force of automobile test wheel

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100264260B1 (en) * 1995-11-21 2000-08-16 정몽규 Regenerating test method and the apparatus for braking energy of vehicles
KR20030043090A (en) * 2001-11-27 2003-06-02 엘지이노텍 주식회사 Apparatus for load testing
JP2009250649A (en) * 2008-04-02 2009-10-29 Central Japan Railway Co Model experiment device for railway vehicle
CN102156014A (en) * 2011-03-10 2011-08-17 吴明 Heavy vehicle chassis dynamometer
CN106989938A (en) * 2017-05-05 2017-07-28 吴明 Loading and inertia detect vehicle dynamic quality method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100264260B1 (en) * 1995-11-21 2000-08-16 정몽규 Regenerating test method and the apparatus for braking energy of vehicles
KR20030043090A (en) * 2001-11-27 2003-06-02 엘지이노텍 주식회사 Apparatus for load testing
JP2009250649A (en) * 2008-04-02 2009-10-29 Central Japan Railway Co Model experiment device for railway vehicle
CN102156014A (en) * 2011-03-10 2011-08-17 吴明 Heavy vehicle chassis dynamometer
CN106989938A (en) * 2017-05-05 2017-07-28 吴明 Loading and inertia detect vehicle dynamic quality method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
摩托车制动器试验台电模拟惯量的研究;吴广顺 等;《机械工程与自动化》;20101231(第6期);第117-119页

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