一些装配S195柴油机的小四轮拖拉机,其机油压力由压力表显示。为经济合理地使用压力表,通常选择的压力表量程在0～7公斤力/厘米~2范围内。S195柴油机正常工作时的机油压力在3公斤力/厘米~2以下,所以选用上述压力表,能够满足需要。然而,由于大多数S195柴油机无压力调整机构,在柴油机起动时,特别在寒冷的严冬季节,机油很稠,大油门状态起动时,柴油机短期内的机油压力随转速增高而增加,有时甚至高达20公斤力/厘米~2。如此大的机油压力,很容易将机油压力表冲坏,给用户的使用带来影响,造成不必要的经济损失。这种情况,在新机器上尤其容易发生,因为新机器机油泵功能强,各配合间隙小,渗漏 Some small four-wheel tractors equipped with S195 diesel engines have their oil pressure displayed by a pressure gauge. Economical and reasonable use of pressure gauges, pressure gauges are usually selected range of 0 ~ 7 kg force / cm ~ 2 range. S195 diesel engine oil pressure during normal work in the 3 kg / cm ~ 2 or less, so the use of the above pressure gauge to meet the needs. However, since most S195 diesel engines have no pressure-adjusting mechanism, the engine oil is very thick during the start-up of the diesel engine, especially during the cold winter. When the large throttle is started, the oil pressure of the diesel engine increases with the increase of the speed in the short term, sometimes up to 20 Kg power / cm ~ 2. Such a large oil pressure, it is easy to punch the oil pressure gauge, affecting the use of users, resulting in unnecessary economic losses. This situation is particularly prone to new machines, because the new machine oil pump features strong, with the small gap, leakage