Calculation of traction characteristics of the car GAZ-3110

Contents

p

Introduction

1 Technical characteristics of the car

1.1 Purpose, classification designation, adaptability to

road conditions

1.2 Technical characteristic of the transmission: factor

transformations, gear ratio, definition of gear series

1.3 Kinematic diagram of gearbox

2 Dynamic car passport

2.1 Calculation and construction of engine external speed characteristic

2.2 Calculation and construction of traction part of passport

2.3 Forecast of vehicle traction dynamics and efficiency in

selected conditions

3 Analysis of dynamic processes

3.1 Calculation and construction of acceleration schedule

3.2 Diagram construction and calculation of time and overtaking path

Conclusions

Literature

Introduction

The operational properties of the car, which determine the adaptability of its design to effective use in real conditions, are capacity (passenger and cargo capacity),

use of mass, traction and braking dynamism, fuel economy, stability, controllability, maneuverability, smoothness, cross-country ability, reliability (failure-free, durability,

repairability, persistence), safety.

Efficiency as dimensionless effect ratio

(positive result) to commensurate costs of its production can be energy and value (economic).

Since the car is a converter of the chemical energy of fuel and atmospheric air through the thermal flow of combustion products Gt Hu into the translational movement of mass mg of the driver, passengers,

cargoes or special equipment on roads, streets and terrain with instantaneous working speed, then its effect can be measured by the useful pulse mg¼ a and the useful power Na of translational motion in a car of useful mass mg, and the energy efficiency of road transportation - by the efficiency (efficiency) of a car ¼ a.

At the same time, the useful (transport) work of the car should be determined by integrating the instantaneous power Na for time t, and the cost efficiency of the car - by the ratio of the price (tariff) to the cost of useful (transport) work, measured in physical units (MJ)

taking into account the dynamic factor of the car on the engine Dg and the clutch

, road conditions indicators (¼, f, i) and driving modes (+ j). All these indicators, which are necessary for graphical determination of the slip factor δ and the working speed, can be synthesized in the dynamic passport of the car.

Conclusions

During implementation of the term paper was provedn rascht tyagovo high-speed properties and the dynamic passport of the GAZ3110 car at the maximum engine capacity of ZMZ402 of Ne, max=73.5 of kW with a frequency of rotation of the crankshaft nN=4500 mines-1 and the maximum torque of Me, max=0.182knm with a frequency of rotation of the crankshaft nm =2500min1. The values of torque, effective power, specific and hourly consumption of fuel and effective efficiency were calculated at the given correction factor Kr = 0.96 and the selected value of effective efficiency ¼ e, N = 0.285 of the engine, the results of which are given in Table 2.1. At coefficient of KW=0.25 H ·s2/m4, Ntr. about =3 kW and also data of table 2.1 values of theoretical speed, efficiency of transmission, tangent force on a wheel, forces of resistance of air, a dynamic factor were calculated. Calculation results are listed in Table 2.2. As the crankshaft speed increases, the effective power and hourly fuel consumption increase to 4,500 rpm and reach their maximum value at this frequency. With an increase of n more than 2500 rpm, the torque decreases, with an increase of n from 0 to 2500 rpm, the torque increases. The highest value of effective efficiency and the lowest value of specific flow at the speed of 3100... 3700 rpm.