• 1. engine firing order: 发动机发火次序
• 2. engine control system firing order: 发动机发火次序

• 1.Each piston fires at a different time, determined by the engine firing order.
  每隔活塞按不同的点火顺序依次点火。
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• 2.Fuel injectors pulse to follow engine firing order, in accordance with engine demand, on a tuned intake manifold.
  按照引擎的要求，燃料注入器在一个受到调整的进流管上进行脉动注入，以跟随引擎的点火顺序。
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• 3.The numerical simulation results show that the equivalent stress intensity factors KIeq relates with the engine firing order, their peak value rises while the crack depth increases.
  计算结果表明，等效应力强度因子与发动机点火顺序密切相关，其峰值随裂纹深度的增加而增大。
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