What Causes Gear Shifting Jerk in Corolla?
1 Answers
Gear shifting jerk occurs when the engine speed does not match the current vehicle speed, meaning there is a difference between the engine speed and the clutch speed. Here are specific methods to avoid gear shifting jerk: 1. Adjust the shifting RPM: It is necessary to moderately reduce the engine speed during shifting, such as shifting at 1500 rpm. For large-displacement engines or those with excellent low-speed torque, shifting can even be done at low RPMs of 1000-1200 rpm without causing jerk, and it has minimal impact on acceleration. 2. Adjust the gear engagement sequence: The standard gear engagement sequence is progressive, following the 1-2-3-4-5 pattern. In certain situations, skipping gears can also avoid jerk, such as shifting directly from 2nd gear to 4th gear when the engine speed reaches 2000 rpm, or shifting directly from 3rd gear to 5th gear. 3. Shorten the shifting time: Using the two-step shifting method (first pressing the clutch to disengage the gear, then pressing the clutch again to engage the gear) requires a longer shifting time, which can cause the engine speed to drop too much and result in jerk. Using the one-step method (pressing the clutch and then continuously disengaging and engaging the gear) can shorten the overall shifting time, and the smaller drop in engine speed can help avoid jerk. The semi-clutch state can accelerate wear on the clutch bearing and pressure plate, eventually leading to clutch failure, so it is advisable to minimize the use of the semi-clutch state.
