Методика расчета тягово-скоростных свойств и топливной экономичности автомобиля на стадии проектирования. Вохминов Д.Е - 31 стр.

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МАМИ | Москва

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31
5.4. <j_fy b imlv jZa]hgZ
Hij_^_ey_lkyihnhjfme_
i_ji_j9M9L9999R9
QWWWWWW
⋅++++=
−−−
(24)
]^_
t
o
±\j_fy^hklb`_gbyfbgbfZevghcqZklhlu\jZs_gbydhe_gqZlh]h\ZeZ
t
i_j
±\j_fyi_j_dexq_gbyi_j_^ZqbkflZ[e
n
i_j
±dhebq_kl\hi_j_dexq_gbci_j_^ZqkflZ[e
LZ[ebpZ
:\lhfh[beb
t
o
>k@ t
i_j
[c]
e_]dh\u_ 1,0 0,2
]jmah\u_ 1,0 0,4
JZkq_lgmx aZ\bkbfhklv ^ey hij_^_e_gby \j_f_gb jZa]hgZ Z\lhfh[bey \
aZ^Zgghf ^bZiZahg_ kdhjhkl_c Vi–9M fh`gh ihemqblv ba mjZ\g_gbcb
ihke_ kh\f_klgh]h bo j_r_gby hlghkbl_evghGWb ihke_^mxs_]h
bgl_]jbjh\Zgby
()()
()()
∆−+∆++
∆++∆−+
∆
=
<K9<K9
<K9<K9
OQ
*
W
Rd
Rdw
; (25)
]^_
:K<
−=∆
;
()
()
I
R
RI
h
hlj
RR
PPD[L
d
lj
J3jjj
U
8L9K
:
µ+µ+−−−−
⋅π
⋅
=
τ
;
Z<
−=⋅
G
m
⋅µ
;
() ()
I
\O
d
lj
P
d
lj
)K
U
8
EE
U
8L9K
K
µ+µ+
ρ
−
+
⋅π
⋅
−=
τ
.
I_j_^ l_f dZd ijh\h^blv jZkq_lu k ihfhsvx ^Zgghc nhjfmeu
g_h[oh^bfh hij_^_eblv fbgbfZevgmx±9PLQb fZdkbfZevgmx±Vmax
dbg_fZlbq_kdmx kdhjhklv gZ dZ`^hc i_j_^Zq_ \ DI ih nhjfme_  >ey
hij_^_e_gby9PLQ\^Zgghcnhjfme_n=1000 h[fbgZ^eyVmax – n
max
.
Nhjfmem ^ey hij_^_e_gby imlb jZa]hgZ fh`gh ihemqblv ZgZeh]bqguf
h[jZahf ^ey wlh]h \ bkoh^guo mjZ\g_gbyo g_h[oh^bfh ijhba\_klb aZf_gm
dV/GWgZVdV/dS.
                                                    31
      5.4. < j _ f y  b  i m l v  j Z a ] h g Z


      Hij_^_ey_lkyihnhjfme_

      W 9 = W R + W 9− 9  + W 9  − 9  + W 9L − 9M + W i_j ⋅ Q i_j                    (24)

]^_   to±\j_fy^hklb`_gbyfbgbfZevghcqZklhlu\jZs_gbydhe_gqZlh]h\ZeZ
      ti_j±\j_fyi_j_dexq_gbyi_j_^ZqbkflZ[e
      ni_j±dhebq_kl\hi_j_dexq_gbci_j_^ZqkflZ[e

                                                                                       LZ[ebpZ

                                 :\lhfh[beb                      to>k@              ti_j [c]
                               e_]dh\u_                           1,0                  0,2
                               ]jmah\u_                           1,0                  0,4

      JZkq_lgmx aZ\bkbfhklv ^ey hij_^_e_gby \j_f_gb jZa]hgZ Z\lhfh[bey \
aZ^Zgghf ^bZiZahg_ kdhjhkl_c Vi–9M fh`gh ihemqblv ba mjZ\g_gbc   b  
ihke_ kh\f_klgh]h bo j_r_gby hlghkbl_evgh GW b ihke_^mxs_]h
bgl_]jbjh\Zgby

           * w (K9d + < − ∆ )(K9R + < + ∆ )
      W=      OQ                                ;                                           (25)
           ∆     (K9d + < + ∆ )(K9R + < − ∆ )

]^_   ∆ = <  − :K ;


      :=
           L9K ⋅ 8 lj
              π ⋅ Ud
                         (jL PD[ − jRP − jRτ )− 3ljh h − J RI R ( + µ + µI );
      < = −Z ⋅Gm⋅µ;

                                                
             L9K ⋅ 8 lj                8 
      K=−                 (E P + E τ ) lj  − K O ρ \ ) ( + µ + µ I ).
               π ⋅ Ud                  Ud        

      I_j_^ l_f dZd ijh\h^blv jZkq_lu k ihfhsvx ^Zgghc nhjfmeu
g_h[oh^bfh hij_^_eblv fbgbfZevgmx ± 9PLQ b fZdkbfZevgmx ± Vmax
dbg_fZlbq_kdmx kdhjhklv gZ dZ`^hc i_j_^Zq_ \ DI ih nhjfme_   >ey
hij_^_e_gby9PLQ\^Zgghcnhjfme_n=1000 h[fbgZ^eyVmax – nmax.
      Nhjfmem ^ey hij_^_e_gby imlb jZa]hgZ fh`gh ihemqblv ZgZeh]bqguf
h[jZahf ^ey wlh]h \ bkoh^guo mjZ\g_gbyo g_h[oh^bfh ijhba\_klb aZf_gm
dV/GWgZVdV/dS.

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