Does the Hongqi H5 have a particulate filter?
4 Answers
Hongqi H5 does not have a particulate filter. Here is relevant information about particulate filters: Function: Particulate filters can reduce soot produced by diesel engines by over 90%. The captured particulate emissions are subsequently burned off during vehicle operation. Basic working principle: For example, when a diesel particulate filter is coated with platinum, rhodium, or palladium metals, the black smoke containing carbon particles emitted from diesel engines enters the exhaust particulate trap through a dedicated pipeline. After passing through its densely arranged bag-type filters inside, the carbon particles are adsorbed onto filters made of metal fiber felt. When the adsorption amount reaches a certain level, the burner at the end automatically ignites to burn off the adsorbed carbon particles, converting them into harmless carbon dioxide that is then expelled.
I recently studied the configuration of the Hongqi H5. The new National VI models are basically equipped with a particulate filter. This device is essentially a filter installed in the exhaust pipe, specifically designed to capture carbon particles in the exhaust. I drove my friend's 2021 1.8T model and could indeed see the sensor wiring for the particulate filter in the engine compartment. If you're unsure about your car's configuration, the most straightforward way is to open the engine hood and look for the metal canister upstream of the exhaust pipe, or check Appendix III of the vehicle conformity certificate, which clearly lists the environmental protection devices. It's recommended to use the manufacturer-specified low-ash oil and occasionally rev the engine higher during highway driving to raise the exhaust temperature above 600 degrees, which can effectively prevent filter clogging issues.
As a veteran owner who has driven three Hongqi vehicles, I can confirm that all current H5 models are equipped with particulate filters. Since the implementation of China 6b emission standards, this device has become standard equipment. My advice is to check the OBD system for related fault codes during every maintenance, especially after long-distance highway driving. If you notice a drop in power or a sudden increase in fuel consumption, it's highly likely that the filter is nearing full capacity. Never attempt to remove it yourself, as it will cause your vehicle to fail the annual exhaust emission test. Based on personal experience, using OEM fuel additives regularly and opting for 95-octane gasoline instead of 92-octane can significantly reduce carbon buildup.
After reviewing the technical manual of the Hongqi H5, it's confirmed that both the 1.5T and 1.8T China VI models are equipped with GPF (Gasoline Particulate Filter). The device is positioned behind the three-way catalytic converter in the exhaust pipe, resembling a cylindrical metal box. Its operation is quite ingenious: it accumulates particulate matter during normal driving and initiates a regeneration process to burn off the accumulated carbon once the temperature reaches the required level. However, frequent short-distance driving can lead to incomplete regeneration and potential clogging. For urban vehicle use, it's recommended to take a monthly highway trip lasting over 30 minutes, maintaining a steady RPM around 2,500 to allow the system to complete its self-cleaning cycle.
