Shifting the vehicle is traveling, it is carried out in a case where the transmission gear rotating when the peripheral speed of the pair of gears engaged for equal eating, can smoothly engaged without impact nibble. To meet this requirement, commonly used method feet shift clutch operation. This method is a low speed by the high speed upshift and downshift specific operations (upshifting and downshifting), different methods of addition and subtraction profile, will be described separately:
First, a low gear upshift (upshift) in the sequence of operations:
2, and then the clutch pedal, the shift lever quickly a high gear engaged (the two actions at the same time).
Clutch gear feet plus working principle is: the first depress the clutch pedal, after the gear shift into neutral, the rotational speed of the transmission speed of the first shaft and the intermediate shaft is faster than the second axis, therefore, need to chew one pair of engagement the circumferential speed of the gear speed is also poor, which need to try to reduce the speed of the first shaft and the intermediate shaft, so that the peripheral speed of the pair of gears is close to unity, for eating together. The first time lift the clutch pedal, the engine idling and its role is to use (because the accelerator pedal is raised) retractor hindrance, reducing the rotational speed of the first shaft to force, when the peripheral velocity which closely conforms to the pair of gears, again depressing the clutch pedal, to a very smooth engagement of high gear, the purpose of the upshift.
In the upshift operation, the first lift of the clutch pedal, the speed reducing time forcing the first axis (i.e. the shift lever in the neutral position stay time), should be different according to the pre-upshift acceleration program. In principle, the acceleration time is short, can in passing, accelerate long time, you can stop a little; when the acceleration time is longer, can significantly halt. In addition, it should listen to the sound of the engine is observed, when the accelerator pedal is lifted, when the engine is decreased from high speed to idle, i.e., is the best time to a high gear engaged. Acquire the above points, operably was appropriately.
1, lift the accelerator pedal while depressing the clutch pedal, while the gear position into a neutral position (three actions are performed simultaneously).
2, lift the clutch pedal at the same time, quickly depress the accelerator pedal and lift, that is, add foot Oil (Oil-backoff clutch and processing are carried out simultaneously).
3, the clutch pedal depressed again while the low gear position quickly engaged a gear c these two actions are carried out simultaneously).
4, while the accelerator pedal is depressed, the clutch pedal lift slightly faster.
Feet clutch downshift works: driving at high speed, when the clutch pedal, the transmission speed of the first shaft and the intermediate shaft rotational speed slower than the second shaft, the peripheral velocity needs to bite pair of gears is engaged speed disparity. This requires seeking to enhance the speed of the first shaft and the intermediate shaft, so that the peripheral speed of the pair of gears is close to unity, in order to land smoothly engaged. When said first clutch is relaxed, air should be added to effect foot oil, it is to improve the speed of the first shaft and the intermediate shaft, so that the circumference of gears converge. When it closely conforms to the circumference of the gear, the clutch pedal is depressed again, it can be successfully linked into a low gear, to achieve the purpose of a downshift.
Vehicle traveling at high speed, increased resistance is encountered (e.g., uphill or obstacles encountered deceleration), the vehicle speed decreases when the original can not be maintained with the gear speed, you must quickly change into a lower gear. As occasion demands, but also to the lowest speed gear change step by step.
Downshifts opportunity: engine power began to feel were insufficient, the speed is about to fall. In the process of downshifting, CSA poise number (i.e. oil plus empty large and small), shall vary depending on the time of vehicle speed, vehicle deceleration gear and the like. In principle the high speed, low gear, the deceleration, the oil should be appropriate to add air (bigger); the contrary, should be less add appropriate (smaller). This is, in practice, trial and error must, in order to have a good grasp.
Upshifts and downshifts properly, which requires timely shifting, smooth engagement and be sequentially carried out step by step, and the error can not leapfrog shifting gears. To ensure that does not change the wrong gear, should have in operation: Before first depress the clutch pedal, the shift lever into neutral at the same time, that should be required to enter the gear shift lever placed in hold (not neutral about shaking). When the clutch pedal is depressed again, the desired gear can be accurately linked to people. It should also be noted that when the operation: steady-hand, hold the steering wheel in one hand and operate, eyes looking forward, the operating parts must not look down.