Welcome to Emissions Guide
Diesel Emissions Article
. For a permanent link to this article, or to bookmark it for further reading, click here.
The Function Of The 2001 Jeep Cherokee Emissions Control Leak Detection Pump
from:As part of the emissions control system, the 2001 Jeep Cherokee emissions control leak detection pump, more commonly known as the LDP, works within the system to prevent evaporative emissions from the vehicle. Evaporative emissions are different than tailpipe emissions since they occur directly from the gasoline stored in the gas tank and engine and are produced when the vehicle is sitting idle as well as when it is running. The 2001 Jeep Cherokee emissions control leak detection pump works like any other leak detection pump in monitoring any problems within the system that traps the gasoline vapors before they escape and cause damage to the environment.
Basically the 2001 Jeep Cherokee emissions control leak detection pump works as part of the system that self-monitors, does routine diagnostic tests as well as adjusts to correct problems. In addition the LDP also produced data that is relayed to the on-board diagnostic system, OBD-ll that stores this information for review by a technician when the vehicle is brought in for service. The OBD-ll generates a list of codes that allows the mechanic (more correctly the technician) to be able to see how the various emission system parts, including the LDP, are working at any given time.
The 2001 Jeep Cherokee emissions control leak detection pump is the first step in the diagnostic test that the vehicle will periodically run on itself. The reason that the LDP is the first test is because it is required to pump or pressurize and seal the rest of the system to allow the rest of the diagnostic test. If the LDP was malfunctioning, the rest of the emissions system would read as malfunctioning, invalidating all the test results. The system first tests the LDP for leaks, electrical malfunction or damage. Once the 2001 Jeep Cherokee emissions control leak detection pump passes this test, the next step is for the system to electronically signal to the pump to seal off the vent valve and pressurize the rest of the emissions control system. If the vent does not seal, an error code is generate and the rest of the test is stopped. Provided the vent seals correct, the system is closed and pressurized and the test continues.
There are several different parts in the LDP including the solenoid, upper and lower pump, vent values, check valves and an outlet check valve. The electrical components are also included in the pump and must be working correctly for the pump to function and operate. Thankfully the leak detection system is so sophisticated it can identify tiny malfunctions in the LDP and signal problems before there are serious issues within the system.
Diesel Emissions Specific links
Diesel Emissions News
Better Characterization Of Diesel Exhaust Particulates - Pollution Online (press release)
Better Characterization Of Diesel Exhaust Particulates Pollution Online (press release) The increasing number of environmental zones in large towns with stricter motor vehicle entry allowances, in combination with discussions concerning particulate emissions, is drawing increasing attention to pollutants released from diesel exhaust ... |
BC's AirCare program to end after 20 years - Vancouver Sun (blog)
 Globe and Mail | BC's AirCare program to end after 20 years Vancouver Sun (blog) AirCare's new focus on heavy-duty diesel vehicles, however, does follow recent passage of a Metro Vancouver bylaw aimed at reducing emissions from backhoes, excavators, forklifts and other diesel-powered machines. “Addressing major sources of ... BC snuffing out AirCare car test program; turns attention to diesel vehicles Clark to phase out vehicle emissions testing BC to end AirCare car program in 2014 |
New Haven Department of Public Works trucks retrofitted to cut diesel ... - New Haven Register
New Haven Department of Public Works trucks retrofitted to cut diesel ... New Haven Register The city showcased one of six Department of Public Works trucks Tuesday at Public Works Headquarters that were retrofitted with diesel exhaust filters. The filters will eliminate 95 percent of particulate matter, 85 percent of unburned hydrocarbons and ... |
Neste Pro Diesel is Said to Lower Emissions by up to 20 Percent - Hybrid Cars News
 Hybrid Cars News | Neste Pro Diesel is Said to Lower Emissions by up to 20 Percent Hybrid Cars News Additionally, due to the inclusion of NExBTL or HVO (a 100 percent hydrocarbon fuel), Neste Pro Diesel can also reduce a single vehicle's greenhouse gas emissions by 10 to 20 percent. The fuel will be used for the first time publicly during this year's ... |
BCTA wary AirCare program phase-out will shift emissions focus to trucking - Truck News
BCTA wary AirCare program phase-out will shift emissions focus to trucking Truck News There are already checks and balances in place for diesel engines and fuel that are achieving impressive results in reducing emissions on their own,” says Louise Yako, BCTA's president and CEO. BCTA officials point to the continuously improved ... |