EPAVersion: 2023-06-29

GT Power 2020 GM 3.0L Duramax Engine from Argonne Report Diesel Fuel - ALPHA Generation Process

This document summarizes the process used to generate a full engine fuel consumption map for a 2020 General Motors 3.0L Diesel engine modeled using GT-Power® as documented in the “Engine Efficiency Technology Study” Final Report prepared for Argonne National Laboratory included in this package as 3b- Engine Efficiency Technology Study Final Report for Argonne National Lab.pdf (Thomas E. Reinhart, Engine Efficiency Technology Study: Final Report, SwRI Project No. 03.26457, November 30, 2021). The original GT-Power® model configuration as published in the report was re-run by SwRI using the EPA specified MTE Diesel fuel shown in the Fuel Properties section below. The GT-Power® model data using the MTE Diesel fuel was then used to generate this ALPHA engine map which defines the complete operating boundaries of the engine needed for ALPHA modeling including idle, WOT, minimum torque, and maximum speed.

SUGGESTED CITATION:
GT Power 2020 GM 3.0L Duramax Engine from Argonne Report Diesel Fuel - ALPHA Map Package. Version 2023-06. Ann Arbor MI: US EPA National Vehicle and Fuel Emissions Laboratory, National Center for Advanced Technology, 2023.

Engine Physical Characteristics

Set physical characteristics based on published information provided in 3b- Engine Efficiency Technology Study Final Report for Argonne National Lab.pdf.

engine                  = [];
engine.name             = 'GT Power 2020 GM 3.0L Duramax Engine from Argonne Report Diesel Fuel';
engine.combustion_type  = enum_engine_combustion_type.compression_ignition;
engine.displacement_L   = 3;
engine.num_cylinders    = 6;
engine.bore_mm          = 84;
engine.stroke_mm        = 90;

Fuel Consumption Data

Import the GT-Power® modeled MTE Diesel fuel data provided in 3c- GT Power 2020 GM 3.0L Duramax Engine Diesel Fuel - Test Data File.xlsx. EPA reviews the quality of the test data we import to ensure consistency with expected data trends and emotor system physics. Any data points considered significant outliers are removed from the dataset before generating the final efficiency map. In addition, since many of the datasets are missing low-speed and torque datapoints, occasionally a few “grounding” datapoints are added to help the curve fitting algorithm extrapolate the gradients near the map’s boundaries.

SS_data_tab = readmatrix('3c- GT Power 2020 GM 3.0L Duramax Engine Diesel Fuel - Test Data File.xlsx','sheet','Steady State Test Data','DataRange','A6:F262');
SS_data.name        = 'Core Test Data';
SS_data.speed_rpm   = SS_data_tab(:,1);
SS_data.bmep_bar    = SS_data_tab(:,2);
SS_data.fuel_gps    = SS_data_tab(:,3);

Maximum Torque (WOT) Curve Data

Import the maximum torque data provided in 3c- GT Power 2020 GM 3.0L Duramax Engine Diesel Fuel - Test Data File.xlsx. An additional estimation point was added at 650 RPM and 100 Nm to extrapolate the trend of WOT line below 1000 RPM.

WOT_data_tab = readmatrix('3c- GT Power 2020 GM 3.0L Duramax Engine Diesel Fuel - Test Data File.xlsx','sheet','Maximum Torque','DataRange','A5:B17');
WOT_data.speed_rpm = [WOT_data_tab(:,1);650];
WOT_data.torque_Nm = [WOT_data_tab(:,2);100];

Minimum Torque (Zero Accelerator Pedal) Curve Data

Import the minimum torque data provided in 3c- GT Power 2020 GM 3.0L Duramax Engine Diesel Fuel - Test Data File.xlsx.

CT_data_tab = readmatrix('3c- GT Power 2020 GM 3.0L Duramax Engine Diesel Fuel - Test Data File.xlsx','sheet','Minimum Torque','DataRange','A5:B12');
CT_data.speed_rpm = CT_data_tab(:,1);
CT_data.torque_Nm = CT_data_tab(:,2);

Fuel Properties

Load the MTE Diesel fuel properties provided by EPA for SwRI to use when generating the GT-Power® modeled data specified in 3c- GT Power 2020 GM 3.0L Duramax Engine Diesel Fuel - Test Data File.xlsx.

engine.fuel = class_REVS_fuel('MTE_DIESEL');
disp(engine.fuel);
  class_REVS_fuel with properties:

                        id: 'MTE_DIESEL'
               description: 'Diesel for MTE'
          density_kgpL_15C: 0.8389
      energy_density_MJpkg: 43.0980
    carbon_weight_fraction: 0.8740
           alcohol_pct_vol: 0
                  gCO2pgal: 10180
    energy_density_BTUplbm: 1.8529e+04
          specific_gravity: 0.8397

Set Idle Speed

Use the Idle speed provided in the test data specified in 3c- GT Power 2020 GM 3.0L Duramax Engine Diesel Fuel - Test Data File.xlsx file.

engine.idle_target_speed_radps =  700 * unit_convert.rpm2radps ;

Engine Build for Simulation in ALPHA

Construct the ALPHA engine, combining all of the above inputs. Fit the fueling data onto a grid for simple interpolation and establish points that represent the maximum and minimum engine torque versus speed. Confirm the quality of fit between the input data and the resulting engine description by examining the resulting plots.

engine = REVS_build_engine(engine, SS_data,'WOT', WOT_data,'CT', CT_data, 'plot_bsfc','plot_efficiency'...
            ,'bsfc_contours',[200:5:220, 220:10:300],'efficiency_contours',[30:1:42,5:2:30]);

Idle Fuel Verification

Confirm appropriate fuel consumption near idle conditions.

REVS_check_idle_fuel(engine)
Estimated idle fuel consumption @ 700 RPM & 58.3 Nm: 0.276 g/sec => Indicated Efficiency: 48.8%
Warning: Idle fuel consumption is below expected range [0.385 - 0.500] 

Fuel Map Linearity

Confirm expected trends in output fuel map, specifically in regions where test data are unavailable.

REVS_plot_engine_fuel_linearity(engine)

Model Calibration Options

Calibrate additional properties of the REVS engine model which can be set to match observed behaviors during the validation process.

Note: Default values are used unless properties are specified below, which are derived from the composite set of EPA testing and model validation activities.

File Description

Generate and write the created ALPHA engine definition into a file for use in later simulations.

engine.write_mscript('engine_GTP_2020_GM_Duramax_3L0_Diesel_report_image_Diesel.m');

Engine Build: engine_GTP_2020_GM_Duramax_3L0_Diesel_report_image_Diesel.m


% ALPHA ENGINE DEFINITION
% Generated 29-Jun-2023 11:06:49

% Constructor
engine = class_REVS_engine();
engine.name =  'GT Power 2020 GM 3.0L Duramax Engine from Argonne Report Diesel Fuel'; 
engine.source_filename = mfilename;
engine.matrix_vintage = enum_matrix_vintage.present;

% Physical Description
engine.displacement_L =  3; 
engine.num_cylinders =  6; 
engine.combustion_type = enum_engine_combustion_type.compression_ignition;
engine.bore_mm =  84; 
engine.stroke_mm =  90; 

% Maximum Torque Curve
engine.full_throttle_speed_radps = [	     0.0000000000000000	;     68.067840827778852	;     104.71975511965977	;     130.89969389957471	;     157.07963267948966	;     261.79938779914943	;     314.15926535897933	;     366.51914291880917	;     418.87902047863906	;     471.23889803846896	;     494.80084294039244	;     518.36278784231592		]; 
engine.full_throttle_torque_Nm = [	     0.0000000000000000	;     100.00000000000000	;     332.70990000000000	;     600.49554000000001	;     620.20569999999998	;     622.04236000000003	;     619.40890000000002	;     580.57870000000003	;     496.74759999999998	;     372.43554999999998	;     316.49512749999991	;     0.0000000000000000		]; 
engine.naturally_aspirated_speed_radps = [	     0.0000000000000000	;     518.36278784231592		]; 
engine.naturally_aspirated_torque_Nm = [	     214.85917317405870	    214.85917317405870		]; 

% Minimum Torque Curve
engine.closed_throttle_speed_radps = [	     0.0000000000000000	;     73.303828583761842	;     261.79938779914943	;     418.87902047863906	;     518.36278784231592		]; 
engine.closed_throttle_torque_Nm = [	    -13.753939393939396	;    -21.000000000000000	;    -34.399999999999999	;    -55.159999999999997	;    -64.993939393939399		]; 

% Fuel Map
engine.fuel_map_speed_radps = [	     0.0000000000000000	;     26.179938779914941	;     52.359877559829883	;     78.539816339744817	;     104.71975511965977	;     130.89969389957471	;     157.07963267948969	;     183.25957145940455	;     209.43951023931953	;     235.61944901923454	;     261.79938779914943	;     287.97932657906438	;     314.15926535897938	;     340.33920413889422	;     366.51914291880911	;     392.69908169872417	;     418.87902047863906	;     445.05895925855401	;     471.23889803846896	;     494.80084294039244	;     518.36278784231592		]; 
engine.fuel_map_torque_Nm = [	    -68.243636363636369	;    -33.892448575620058	;    0.45873921239624882	;     23.893092229337718	;     47.731181799760272	;     71.939066917656874	;     95.258884885813842	;     119.34510328164735	;     143.03336635097116	;     166.59049807295057	;     190.90805642926534	;     214.76514382154559	;     238.48875069361134	;     261.78183874429578	;     286.69639430545953	;     310.30004463216676	;     333.90369495887393	;     357.74898431655652	;     381.59427367423916	;     405.05305508319310	;     428.51183649214704	;     452.79210876514173	;     477.07238103813643	;     497.98335510249638	;     525.86644278065114	;     565.85247150635723	;     592.33579819998943	;     618.81912489362162	;     653.14447800000005		]; 
engine.fuel_map_gps = [
 -0.038074473019999562	  -0.12061658760098412	  -0.20306660995658055	  -0.26136350928262947	  -0.30449585542556495	  -0.34635073645540815	  -0.38660135890602820	  -0.42420443599991869	  -0.45725984425160499	  -0.48351315264102313	  -0.50138960185605297	  -0.50736380644097723	  -0.49871252187016019	  -0.47215949472759455	  -0.42322709665823227	  -0.35398174916432884	  -0.26766631706980132	  -0.17543047306661463	 -0.083591245154227431	-0.0014814311982338079	  0.079595977678295238	;
 -0.027368058463971997	 -0.063653153580021438	 -0.099912368959501549	  -0.11119927716512355	  -0.11736963760073746	  -0.12350054401567578	  -0.13086481631442856	  -0.13658807739408513	  -0.13526944891334589	  -0.12261812285004903	 -0.093620849923312280	 -0.051798631707022584	-0.0014792045647445606	  0.057809875157738652	   0.13266938999388728	   0.24876021482397395	   0.37746881193388254	   0.52260646297993707	   0.68123624697848817	   0.81357800756260745	   0.94137637697479970	;
 -0.016811533343641185	-0.0067494972330714555	 0.0078381041457056874	  0.039237397358318694	  0.069528810614845088	  0.098183482901723379	   0.12347713764495491	   0.15045160976962890	   0.18782718105366297	   0.23510206508334930	   0.31545346771654981	   0.40286646497839196	   0.49379875319849392	   0.59843034980407495	   0.69048065745263720	   0.86437131043017967	    1.0147383216322445	    1.2108093276281613	    1.4469627995101346	    1.6247297441300168	    1.8057178857985752	;
-0.0097748887267624235	  0.032002956889529387	  0.084755853483404933	   0.14242732613809542	   0.19759310194507326	   0.24503283563379788	   0.29505205893545833	   0.34792129854966153	   0.40978494101388180	   0.48275701375118846	   0.59641753037100287	   0.70910237248278030	   0.82497568986768532	   0.96255012218902147	    1.1155006169397887	    1.2728780096394070	    1.4471916613464137	    1.6891816890548750	    1.9437659484445438	    2.1746479162544565	    2.4032826315669165	;
-0.0027599906052707432	  0.077179182121031351	   0.16322050433917465	   0.24794249090084597	   0.32911284686042241	   0.40504815166386426	   0.48459847499331182	   0.56585160000757706	   0.65178437641366327	   0.75531390442447122	   0.89915237053139940	    1.0353366501835073	    1.1810063414128980	    1.3446300751576004	    1.5387996523807812	    1.7230562267498308	    1.9389448889939489	    2.2163583795525210	    2.4777647502288032	    2.7519006312663326	    3.0178376383364474	;
  0.014020744805609381	   0.12904575963473841	   0.24363919330549866	   0.35724783473012850	   0.47002783088770822	   0.58579718535370895	   0.70043700466708658	   0.81166110985539308	   0.92125784898084706	    1.0639198022213314	    1.2293926621512721	    1.3865413383098442	    1.5706769850016475	    1.7749672829653131	    2.0247164653247696	    2.2690134047089554	    2.5302522547456925	    2.8137154838496441	    3.1011410311011920	    3.3748061238620628	    3.6516798757691982	;
  0.035996598563866569	   0.17954076225505369	   0.32275107552805443	   0.46588020224740673	   0.61116665219516297	   0.76242992299575629	   0.90524860200021595	    1.0483608462193470	    1.1985487260109253	    1.3657294530445230	    1.5571841655439422	    1.7583551830757456	    1.9667935006541009	    2.2763990353944203	    2.5726439722389411	    2.8526847272886018	    3.1457064544310529	    3.4135349864962903	    3.7255371378276108	    3.9975201842950612	    4.2787343659344383	;
  0.058550902630019858	   0.23272705749383374	   0.40682916054538976	   0.58145474649978124	   0.75816246219501304	   0.93814836183502226	    1.1092286237432245	    1.2818959009421769	    1.4700711412740053	    1.6755676057307114	    1.9238495904443857	    2.1806949667479261	    2.4132128797362067	    2.7265921006402802	    3.0533646519758908	    3.3769278092251391	    3.6963442148079895	    4.0123121892056144	    4.3494611342828557	    4.6482199184981638	    4.9487087140589097	;
  0.080984295236690790	   0.28634334064989797	   0.49182477460135804	   0.69782740096048335	   0.90500490536926537	    1.1136464279811369	    1.3128291110330030	    1.5198381522370430	    1.7471474977673154	    1.9871969916527701	    2.2691660044915221	    2.5602613860043317	    2.8262575161866157	    3.1535244544720999	    3.5074109743830562	    3.8612776520213554	    4.2053682649889863	    4.5805515883230052	    4.9591621009668998	    5.2947160550772754	    5.6301086494849848	;
   0.10394342760150185	   0.34095725314617686	   0.57818913632870950	   0.81568952292355201	    1.0529370061877372	    1.2902323373172733	    1.5186309872217030	    1.7591953443233104	    2.0193040543287619	    2.2943864612947875	    2.5988491849243331	    2.9248906857323127	    3.2286321161207607	    3.5939490917054391	    3.9716472014225443	    4.3384452495658854	    4.7266846462913392	    5.1444193876541995	    5.5657592392116619	    5.9473263634162610	    6.3288547153146570	;
   0.12871263267977079	   0.39862287957855902	   0.66876711658429755	   0.93923102597461428	    1.2096620233638669	    1.4798899991589061	    1.7365641046265956	    2.0075786732610594	    2.2992558474476468	    2.6061308748494354	    2.9493080740163302	    3.3137990633472150	    3.6520663178239063	    4.0489512914230312	    4.4536683446211578	    4.8269340543411241	    5.2794985757447233	    5.7382157721883065	    6.2040081696554834	    6.6373205808394768	    7.0718345671077527	;
   0.15437864049116376	   0.45645737265025116	   0.75873417248183650	    1.0615754123862255	    1.3652132329293674	    1.6687938073339839	    1.9524811870713890	    2.2525866112357305	    2.5753787165812536	    2.9204270759962334	    3.2981936381360302	    3.7010538044663579	    4.0784445640137763	    4.4988482825536469	    4.9231163049324245	    5.3330888818862148	    5.8325987172726643	    6.3358636921732554	    6.8543826313203224	    7.3353389462447192	    7.8215795774198433	;
   0.18142757747792587	   0.51522833006921720	   0.84913608477171187	    1.1835896041239795	    1.5194696630648181	    1.8554817835261497	    2.1689550029643057	    2.4984422535312900	    2.8514584091084600	    3.2329409318028364	    3.6619873634077535	    4.0898488201122039	    4.5038353823665398	    4.9337378205779183	    5.3796966334345999	    5.8480146728088460	    6.3860857972539806	    6.9445855231533935	    7.5180872231546774	    8.0487033775254790	    8.5859866523801891	;
   0.20957067591578057	   0.57411599359965360	   0.93871812680501943	    1.3033983989659401	    1.6686081149573855	    2.0363979912346597	    2.3828027389038198	    2.7453762719831181	    3.1289611263475585	    3.5448337527908218	    4.0227778405234984	    4.4863730124774603	    4.9267138474791512	    5.3594968673442756	    5.8336823344152533	    6.3710632179712112	    6.9521212748882286	    7.5591383597140878	    8.1847402589357117	    8.7652013494510026	    9.3504353376804072	;
   0.24154719197382193	   0.63827533011314452	    1.0351977333208007	    1.4320492123111792	    1.8281636417279521	    2.2272158508470206	    2.6132181282426421	    3.0155725934715769	    3.4319050734344687	    3.8823511038361227	    4.3978761047028545	    4.9270168929264244	    5.4030225533254246	    5.8389097810908721	    6.3427236552989319	    6.9379478837583530	    7.5729442579460091	    8.2355782222571250	    8.9163827129961568	    9.5472432037049195	    10.175140698843149	;
   0.27371133925953933	   0.70003599530009364	    1.1267938082828446	    1.5542706049536923	    1.9814603572578511	    2.4053508738755318	    2.8326036370238925	    3.2688208774283405	    3.7173450044432275	    4.2030315319980005	    4.7446462360581627	    5.3167483641297180	    5.8264940356340276	    6.2975402870319783	    6.8479067960182425	    7.4685504629452319	    8.1554289354438048	    8.8907534209201149	    9.6369078623665843	    10.296940871775865	    10.951437668334016	;
   0.30763949566529480	   0.76275572468801089	    1.2183214334557517	    1.6751111948885256	    2.1331562038611760	    2.5823005707091125	    3.0492350191993371	    3.5219355386319040	    3.9990609548640723	    4.5130649144715678	    5.0744887966364516	    5.6922050686840393	    6.2300249423289999	    6.7470464729929223	    7.3590578989935720	    8.0143514646476941	    8.7494305000598942	    9.5509528405491722	    10.355789202948225	    11.037105776841097	    11.714065377097667	;
   0.34354840556169186	   0.82718563696421998	    1.3109383902807894	    1.7947850536332373	    2.2779724638427030	    2.7610377149887562	    3.2622424955710132	    3.7720413880432400	    4.2798259713727029	    4.8191608225003675	    5.4064163522332738	    6.0295163992810208	    6.5953539514576738	    7.1886045009268393	    7.8631424997727173	    8.5992773601111772	    9.3862346599078563	    10.209650383749782	    11.040424663525789	    11.756462550403514	    12.464569282198022	;
   0.38076717867095899	   0.89266280415066934	    1.4042169225713577	    1.9148653694540618	    2.4245950155253704	    2.9376818969871450	    3.4704360070152975	    4.0163109109865633	    4.5462128813029405	    5.1074962467767895	    5.7147622051205369	    6.3634333225395583	    6.9587175506323486	    7.6251939580098913	    8.3703648498982570	    9.1836000762895669	    10.012417843690061	    10.843757839533216	    11.695060567031460	    12.445333160439334	    13.191345102898426	;
   0.41827892957941298	   0.95811173098105218	    1.4973828375965494	    2.0356646130878215	    2.5740995122559402	    3.1176062036627550	    3.6734638857911701	    4.2377939796387816	    4.7896594246015018	    5.3733105309706843	    6.0002606792011139	    6.6625926550813928	    7.3447173999580828	    8.0842687080389091	    8.8850655970760091	    9.7292364080715217	    10.574371414445189	    11.434366747799132	    12.311121360703916	    13.098775120153682	    13.884317571177343	;
   0.45643364341981613	    1.0246745477604957	    1.5924647793212898	    2.1597661188083523	    2.7279140817153649	    3.2995723204142555	    3.8761399132520564	    4.4621090934604428	    5.0335664362647847	    5.6375478764092648	    6.2898986224644435	    6.9888591859507212	    7.7485730826012738	    8.5565503011777171	    9.4007658353406374	    10.261310843965090	    11.107199222106876	    12.003350457120527	    12.913979331365280	    13.736527127446051	    14.558837423148882	;
   0.49657074278900420	    1.0948156752957345	    1.6929120087056000	    2.2910486744868850	    2.8899134918996419	    3.4900917918792347	    4.0919421931741775	    4.7012548121239588	    5.3066827014011606	    5.9347267165570861	    6.6191243856396342	    7.3742736889988132	    8.1875959425766585	    9.0497964978530163	    9.9293447410674780	    10.792390214007693	    11.664647850944675	    12.588675201269686	    13.532588729059016	    14.386860763818763	    15.241867108728384	;
   0.53751387534967410	    1.1661374973938485	    1.7948887235129709	    2.4239719497382382	    3.0533730360708757	    3.6824893477809297	    4.3101679788201084	    4.9499527024341461	    5.5890556213662492	    6.2440872605211464	    6.9645136002539605	    7.7801548953748396	    8.6348511734361644	    9.5427358332665708	    10.453429178569881	    11.327241048071976	    12.229627700278531	    13.181123031968548	    14.152477906429050	    15.032715797813514	    15.914401933880299	;
   0.57352411151601546	    1.2282585430740074	    1.8832738260355870	    2.5387403563861217	    3.1942368786346029	    3.8484076364389077	    4.5000322298891247	    5.1630150889149649	    5.8279095159694210	    6.5124430518661578	    7.2712679909705962	    8.1224187042989247	    9.0228328985778941	    9.9648862844303938	    10.884032543851349	    11.793501947318882	    12.729832105724178	    13.699343135639097	    14.689768416264284	    15.588501863317218	    16.489278398944414	;
   0.62285028232800921	    1.3118964638736177	    2.0013080114202175	    2.6912155427284028	    3.3810845081698879	    4.0692617016745602	    4.7504040944507251	    5.4492439700171440	    6.1476815226603900	    6.8637225748408159	    7.6765283045235098	    8.5779732064212233	    9.5346876923717563	    10.538006672209692	    11.456445732322614	    12.419163769277205	    13.401786735399838	    14.399521145097514	    15.412216893975454	    16.331231274654606	    17.252877823371673	;
   0.69733732924610448	    1.4332081138818473	    2.1694112899263249	    2.9059860087436657	    3.6419682628565253	    4.3754486254904181	    5.1083866534947697	    5.8515352316779650	    6.5933677985172441	    7.3647079306704661	    8.2598904954296568	    9.2227495292988060	    10.269813918308095	    11.330378629335685	    12.341896580868568	    13.354886634918907	    14.380783132489578	    15.416486576404267	    16.460128729141555	    17.403746052299748	    18.349060216079469	;
   0.74866105664267024	    1.5139601371685381	    2.2794022345246709	    3.0451622011696839	    3.8113568232290134	    4.5775580005601189	    5.3391537874265458	    6.1059599051277909	    6.8842016438640581	    7.7170029225513987	    8.6537125897250533	    9.6738973317916255	    10.765497510804881	    11.860891033502664	    12.925019169794354	    13.978553229840301	    15.034040424834046	    16.094225720233243	    17.158362096173732	    18.118173125903372	    19.078808015609638	;
   0.80089207134185658	    1.5949428797863483	    2.3888601466064596	    3.1826809317366931	    3.9768215073690021	    4.7713377169684357	    5.5629917314951491	    6.3600913703781545	    7.1799929998276273	    8.0649806011119338	    9.0574686661466632	    10.123633193626427	    11.266966720230810	    12.400235481409775	    13.505631788424999	    14.599505577103836	    15.687605900467632	    16.773366359356860	    17.858274160256805	    18.834497036801540	    19.810703018331893	;
   0.86939016971651517	    1.7002226522722885	    2.5304260987249449	    3.3591224217339235	    4.1856721084479380	    5.0108480114521985	    5.8398294554471821	    6.6869461545812916	    7.5789143594108177	    8.5444359464849615	    9.5984126007828241	    10.725404092397790	    11.899801678750832	    13.081180757286527	    14.249872255050256	    15.400427996370084	    16.533917787344631	    17.654475677982497	    18.766849986075869	    19.764643376570124	    20.761377089410171	]; 

% Fuel Properties
engine.fuel = class_REVS_fuel('MTE_DIESEL');

% Idle Speed
engine.idle_target_speed_radps = class_REVS_dynamic_lookup;
engine.idle_target_speed_radps.axis_1.signal =  'eng_runtime_sec'; 
engine.idle_target_speed_radps.axis_1.breakpoints = [	     0.0000000000000000	    10.000000000000000		]; 
engine.idle_target_speed_radps.table = [	     73.303828583761842	    73.303828583761842		]; 

% Calibration Adjustment Factors
engine.variant =  'basic engine';