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Tham khảo tài liệu 'advanced vehicle technology episode 1 part 10', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Clutch brakes CV-A CV-B CV-C CV-D BV-E BV-F and BV-G Fig. 5.39 The clutch valves control the engagement and disengagement of the multiplate clutches and brakes. These valves are variable pressure reduction valves which are actuated by the appropriate solenoid valves electronic pressure regulator valves traction valves and shift valves and are responsible for producing the desired clutch pressure variations during each gear shift phase. Clutch valves CV-B CV-C and CV-F are influenced by modulation pressure which resists the partial closure of the clutch valves hence it permits relatively high fluid pressure to reach these multiplate clutches and brake when large transmission torque is being transmitted. Retaining valves RV-E and RV-G Fig. 5.39 In addition to the electronic pressure regulator valve which actuates the clutch valves the retaining valves RV-E and RV-G modify the opening and closing phases of the clutch valves in such a way as to cause a progressive build-up or a rapid collapse of operating multiplate clutch brake fluid pressure during engagement or disengagement respectively. Traction coasting valve T C-V Fig. 5.39 The traction coasting valve T C-V cuts out the regulating action of the traction valve TV 5-4 and shifts the traction valve TV 4-5 into the shut-off position when required. Traction valve TV 4-5 Fig. 5.39 The traction valve TV 4-5 controls the main system fluid pressure to the multiplate-clutch MPC-B via the traction valve TV 5-4 and clutch valve CV-B and hence blocks the fluid pressure reaching the multiplate clutch CV-B when there is a upshift from fourth to fifth gear. Traction valve TV 5-4 Fig. 5.39 The traction valve TV 5-4 is another form of clutch valve its function being to supply system pressure to the multiplate clutch MPC-B via clutch valve CV-B when there is a downshift from fifth to fourth gear. Converter pressure valve CPV Fig. 5.39 The converter pressure valve CPV supplies the torque converter with a reduced system pressure to
