Test results of Validation test 1b and Cycle modifications
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1 WLTP-DHC-- 1 Test results of Validation test 1b and Cycle modifications Prepared by Japan the th DHC group under GRPE/WLTP informal group 29 March 2 Joint Research Centre, Ispra
2 2 Table of contents WLTP-DHC-- 1. Result of Validation 1b by Japan 2. Result of Validation 1b by India and JRC 3. Summary of Indicated portions. Cycle modification for Validation 2. Proposed WLTC ver. for Validation 2 6. List of issues 7. Characteristics of proposed WLTC ver.. Detail of modifications
3 1.1. Overview of Validation test 1b in Japan WLTP-DHC-- Test mass: A~E: Current JPN regulation test mass (Curb mass + 11 kg) : F: Proposed gtr test mass (almost same as JP-mass) Gear shift: fixed gear shift (by Japan) Vehicle No. A B C D E F Vehicle category PC PC LDCV LDCV LDCV PC Fuel type Petrol Petrol Petrol Petrol Petrol Petrol Engine capacity (cc) Max. rated power (kw) 3 / / 6 36 / 71 / 6 9 / 6 /6 Curb vehicle mass (kg) Test mass (kg) (*) Gross vehicle mass (kg) Power to mass ratio (KW/t) (Curb mass basis) After treatment TWC TWC TWC TWC TWC TWC Emission standard EURO V Transmission MT MT MT MT MT AT Vehicle F: Current JPN reg. mass: kg, Proposed gtr test mass: 16 kg 3
4 1.2. Test result of Passenger car WLTP-DHC-- 1 Target speed km/h Veh.A (JP-mass) Veh.B (JP-mass) Veh.F (Proposed-gtr-mass) 2 Intake pressure (kpa), Vehicle speed (km/h) Vrollar -Vtarget (km/h) ARROW ( ): Require precise acceleration pedal/clutch operation CIRCLE ( ): Hard to follow the trace (require close to W.O.T. operation)
5 1.2. Test result of Passenger car WLTP-DHC-- 1 Target speed km/h Veh.A (JP-mass) Veh.B (JP-mass) Veh.F (Proposed-gtr-mass) 2 Intake pressure (kpa), Vehicle speed (km/h) Vrollar -Vtarget (km/h) ARROW ( ): Require precise acceleration pedal/clutch operation CIRCLE ( ): Hard to follow the trace (require close to W.O.T. operation)
6 1.2. Test result of Passenger car WLTP-DHC-- 1 Target speed km/h Veh.A (JP-mass) Veh.B (JP-mass) Veh.F (Proposed-gtr-mass) 2 Intake pressure (kpa), Vehicle speed (km/h) Vrollar -Vtarget (km/h) ARROW ( ): Require precise acceleration pedal/clutch operation CIRCLE ( ): Hard to follow the trace (require close to W.O.T. operation) 6
7 1.3. Test result of Light duty commercial vehicle WLTP-DHC-- 1 Target speed km/h Veh.C (JP-mass) Veh.D (JP-mass) Veh.E (JP-mass) 2 Intake pressure (kpa), Vehicle speed (km/h) Vrollar - Vtarget (km/h) ARROW ( ): Require precise acceleration pedal/clutch operation CIRCLE ( ): Hard to follow the trace (require close to W.O.T. operation) 7
8 1.3. Test result of Light duty commercial vehicle WLTP-DHC-- 1 Target speed km/h Veh.C (JP-mass) Veh.D (JP-mass) Veh.E (JP-mass) 2 Intake pressure (kpa), Vehicle speed (km/h) Vrollar - Vtarget (km/h) ARROW ( ): Require precise acceleration pedal/clutch operation CIRCLE ( ): Hard to follow the trace (require close to W.O.T. operation)
9 1.3. Test result of Light duty commercial vehicle WLTP-DHC-- 1 Target speed km/h Veh.C (JP-mass) Veh.D (JP-mass) Veh.E (JP-mass) 2 Intake pressure (kpa), Vehicle speed (km/h) Vrollar - Vtarget (km/h) ARROW ( ): Require precise acceleration pedal/clutch operation CIRCLE ( ): Hard to follow the trace (require close to W.O.T. operation) 9
10 1 2. Result of Validation 1b by India and JRC WLTP-DHC-- India Dynamic concerns (difficult to follow the cycle) -67, 1-16, 2-26, 27-29, 66-67, 76-77, 1-2, 16-16, 1-13, 11-11, , 12-1, 13-1, PMR concerns (Vehicles of 3 to 6 kw/t have difficulty) 7-, 116-1, 11-, Difficult to follow the lower speeds of 1km/h JRC Observed difficulty to drive the low speed parts (~1 km/h) with the 1st gear With typical European vehicles, there seems to be few problem to follow the trace (accelerations and top speed portions of WLTC ver.).
11 3. Summary of validation 1b WLTP-DHC-- From the viewpoints of drivability, traceability and reproducibility, the following 31 portions are pointed out by India, JRC and Japan : number of decimal places
12 3. Summary of validation 1b WLTP-DHC-- No. Time Comments by Need to be smoothness Japan 2 67 Difficult to drive the low speed parts JRC/India/Japan Difficult to drive the low speed parts JRC/India/Japan 1-21 Difficult to drive the low speed parts JRC/India/Japan 2-27 Need to be smoothness India/Japan Need to be smoothness India/Japan 7 6 Need to be smoothness Japan 6-61 Require close to W.O.T. operation Japan Difficult to drive the low speed parts JRC/India/Japan 1 79 Difficult to drive the low speed parts JRC/India/Japan Difficult to drive the low speed parts JRC/India/Japan Require close to W.O.T. operation Japan Difficult to drive the low speed parts JRC/India/Japan Require close to W.O.T. operation Japan Difficult to drive (PMR concern) India 16 1 Require close to W.O.T. operation Japan
13 3. Summary of validation 1b WLTP-DHC-- 13 No. Time Comments by Need to be smoothness India/Japan Require close to W.O.T. operation Japan Require close to W.O.T. operation Japan Require close to W.O.T. operation Japan Difficult to drive the low speed parts JRC/India/Japan Difficult to follow the target speed Require close to W.O.T. operation India/Japan Difficult to drive the low speed parts JRC/India/Japan Difficult to follow the target speed Require close to W.O.T. operation India/Japan Require close to W.O.T. operation Japan Require close to W.O.T. operation India/Japan Difficult to follow the target speed India Require close to W.O.T. operation India/Japan Require close to W.O.T. operation India/Japan Difficult to drive (PMR concern) India 31 All to be one decimal point ( to XX.X km/h) Japan
14 1. Proposed cycle modification for Validation 2 WLTP-DHC-- As a first step to move forward to validation 2, Japan propose to modify the following items (1 portions). the minimum speed set to km/h Smoothing to improve repeatability Set vehicle speed one decimal point Other 16 remaining portions regarding dynamic concerns which was indicated by India and Japan should be considered during Validation 2.
15 . Proposed WLTC ver. for Validation 2 WLTP-DHC : Time chart was changed from two decimal point to one decimal point 1 WLTC v Smoothing 2 km/h 3 km/h km/h 6 Smoothing Smoothing WLTC v km/h Smoothing 1 11 km/h km/h 1 17 Smoothing
16 . Proposed WLTC ver. for Validation 2 WLTP-DHC : Time chart was changed from two decimal point to one decimal point 1 WLTC v km/h km/h WLTC v
17 6.1. List of issues WLTP-DHC-- 17 No. Time Comments by Action Need to be smoothness Japan Smoothing 2 67 Difficult to drive the low speed parts JRC/India/Japan Minimum speed to km/h Difficult to drive the low speed parts JRC/India/Japan Minimum speed to km/h 1-21 Difficult to drive the low speed parts JRC/India/Japan Minimum speed to km/h 2-27 Need to be smoothness India/Japan Smoothing Need to be smoothness India/Japan Smoothing 7 6 Need to be smoothness Japan Smoothing 6-61 Require close to W.O.T. operation Japan Evaluated during validation Difficult to drive the low speed parts JRC/India/Japan Minimum speed to km/h & Smoothing 1 79 Difficult to drive the low speed parts JRC/India/Japan Minimum speed to km/h Difficult to drive the low speed parts JRC/India/Japan Minimum speed to km/h Require close to W.O.T. operation Japan Evaluated during validation Difficult to drive the low speed parts JRC/India/Japan Minimum speed to km/h Require close to W.O.T. operation Japan Evaluated during validation Difficult to drive (PMR concern) India Evaluated during validation Require close to W.O.T. operation Japan Evaluated during validation2
18 6.2. List of issues WLTP-DHC-- 1 No. Time Comments by Action Need to be smoothness India/Japan Smoothing Require close to W.O.T. operation Japan Evaluated during validation Require close to W.O.T. operation Japan Evaluated during validation Require close to W.O.T. operation Japan Evaluated during validation Difficult to drive the low speed parts JRC/India/Japan Minimum speed to km/h Difficult to follow the target speed Require close to W.O.T. operation India/Japan Evaluated during validation Difficult to drive the low speed parts JRC/India/Japan Minimum speed to km/h Difficult to follow the target speed Require close to W.O.T. operation India/Japan Evaluated during validation Require close to W.O.T. operation Japan Evaluated during validation Difficult to follow the target speed Require close to W.O.T. operation India/Japan Evaluated during validation Difficult to follow the target speed India Evaluated during validation Difficult to follow the target speed India/Japan Evaluated during validation Difficult to follow the target speed India/Japan Evaluated during validation Difficult to drive (PMR concern) India Evaluated during validation2 31 All to be one decimal point ( to XX.X km/h) Japan one decimal point
19 7.1. Characteristics of proposed WLTC ver. WLTP-DHC-- Parameter Cycle duration Driving distance Average speed Max. speed Max. accelerati on Max. Decelerati on RPA Accelerati on ratio Decelerati on ratio Cruise ratio Idling ratio s (h) km km/h km/h km/h/s km/h/s m/s 2 % % % % X 2 value V-A distribution Normalized X 2 value V-A distribution WWW database (617) WLTC v LOW WLTC v Proposed WLTC v WWW database (3136) WLTC v MID WLTC v Proposed WLTC v WWW database (33) WLTC v HIGH WLTC v Proposed WLTC v WWW database (31) WLTC v Ex-HIGH WLTC v Proposed WLTC v Chi squared value of proposed WLTC v is identical to that of 19
20 7.1. Speed frequency distributions WLTP-DHC-- 2 Low Middle High ExHigh Unified distribution Low Unified distribution Middle Unified distribution High Unified distribution Ex-high Unified distribution WLTC-LOW v2 WLTC-MID v2 WLTC-HIGH v2 WLTC-ExHIGH v2 WLTC v WLTC-LOW v WLTC-MID v WLTC-HIGH v WLTC-ExHIGH v WLTC-LOW v WLTC-MID v WLTC-HIGH v WLTC-ExHIGH v Proposed WLTC v
21 7.3. v * a_pos frequency WLTP-DHC-- LOW MIDDLE Cum. frequency low, WWW database low, low, proposed WLTC v v*a_pos in m²/s³ HIGH 1. Cum. frequency 9%tile of WWW database is 1 m 2 /s 3. Max. of WLTC v is 11.2 m 2 /s 3 9%tile of WWW database is 1 m 2 /s 3.3 Max. of WLTC v is 16.7 m2/s mid, WWW database mid, mid, proposed WLTC v v*a_pos in m²/s³ Extra-HIGH Cum. frequency %tile of WWW database is 16 m 2 /s 3. 9%tile of WWW database is 1 m 2 /s 3.3 Max. of WLTC v is 19.7 m 2 /s 3 Max. of WLTC v is 2.9 m 2 /s 3 high, WWW database.2 extra high, WWW database high, high, proposed WLTC v v*a_pos in m²/s³ Cum. frequency extra high, extra high, proposed WLTC v v*a_pos in m²/s³ The maximum v*a of WLTC ver. exceed 9%tile of WWW database 21
22 . Detail of modification WLTP-DHC-- 22 Not modified, but need further evaluation WLTC v WLTC v WLTC v WLTC v
23 23. Detail of modification WLTP-DHC-- Not modified, but need further evaluation WLTC v WLTC v WLTC v WLTC v
24 2. Detail of modification WLTP-DHC-- Not modified, but need further evaluation WLTC v WLTC v WLTC v WLTC v
25 2. Detail of modification WLTP-DHC-- Not modified, but need further evaluation WLTC v WLTC v WLTC v WLTC v
26 26. Detail of modification WLTP-DHC-- Not modified, but need further evaluation WLTC v WLTC v WLTC v WLTC v
27 27. Detail of modification WLTP-DHC-- Not modified, but need further evaluation WLTC v WLTC v WLTC v
28 WLTP-DHC-- 2 Power to mass ratio on Curb weight (kw/t) G-PC-ordinary G-PC-small G-PC-mini G-LDCV(GVW 1.7t - 3.t) D-LDCV(GVW 1.7t - 3.t) G-LDCV(GVW < 1.7t) G-Mini trucks PC for Validation 1b LDCV for Validation 1b Normalized vehicle weight [ = Curb weight / Gross vehicle weight] Source: JSAE 2
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