tailieunhanh - Advanced Vehicle Technology Episode 2 Part 1

Tham khảo tài liệu 'advanced vehicle technology episode 2 part 1', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | To go though the complete gear ratio steps the range shift is put initially into low then the splitter gear shifts are moved alternatively into low and high as the constant mesh dog clutch gears are shifted progressively up this is again repeated but the second time with the range shift in high see Fig. . This can be presented as range gear shifted into low 1 gear constant mesh low and high splitter 2 gear constant mesh low and high splitter and 3 gear constant mesh low and high splitter gear at this point the range gear is shifted into high and the whole sequence is repeated 1 constant mesh gear low and high splitter 2 constant mesh gear low and high splitter and finally third constant mesh gear low and high splitter thus twelve gear ratios are produced thus First six overall gear ratios splitter gear L and H S X constant mesh gears 1 2 and 3 X range gear low LR Second six overall gear ratios splitter gear L and H X constant mesh gears 1 2 and 3 X range gear high HR . 1 OGR LS 2 OGR HS 3 OGR LS 4 OGR LS 5 OGR LS 6 OGR HS Low range 7 OGR LS 8 OGR HS 9 OGR LS 10 OGR HS 11 OGR LS 12 OGR HS High range X CM 1 X LR X CM 1 X LR X CM 2 X LR X CM 2 X LR X CM 3 X LR X CM 3 X LR X CM 1 X HR X CM 1 X HR X CM 2 X HR X CM 2 X HR X CM 3 X HR X CM 3 X HR where OGR overall gear ratio CM constant mesh gear ratio LS HS low or high splitter gear ratio LS HR low or high range gear ratio Assume that the ignition is switched on and the vehicle is being driven forwards in low splitter and low range shift gear positions see Fig. . To engage one of the three forward constant mesh gears for example the second gear then the gear selector stick is moved into 3 gear position low splitter low range 2 gear . Immediately the ETCU signals the constant mesh 3-2 shift solenoid control valves by energizing the 2 constant mesh solenoid control so that its inlet valve opens and its exhaust valve closes at the same time the 3 constant mesh solenoid control is de-energized so that its inlet .