Welcome to Emissions Guide
Washington 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.
Washington Emissions Specific links
Washington Emissions News
BP Must Pay $400M for Indiana Refinery Emission Controls - Environment News Service
 Environment News Service | BP Must Pay $400M for Indiana Refinery Emission Controls Environment News Service WASHINGTON, DC, May 24, 2012 (ENS) - BP North America Inc. has agreed to pay an $8 million penalty and invest more than $400 million to install state-of-the-art pollution controls and cut emissions from the company's petroleum refinery in Whiting, ... BP Agrees to Precedent-setting Settlement Over Whiting Refinery Pollution Permits US reaches pollution agreement at BP Indiana plant BP, EPA reach deal on Canada crude at US refinery |
Aviation emissions spat may end up at WTO, says expert - Europolitics.info
Aviation emissions spat may end up at WTO, says expert Europolitics.info By Brian Beary in Washington | Friday 25 May 2012 The escalating row over the EU's efforts to reduce airlines' CO 2 emissions may ultimately be left to the World Trade Organisation (WTO) to decide, a policy scholar who has studied the case has ... |
Environmental Groups Press EPA to Regulate Carbon Dioxide From Existing Power ... - Bloomberg BNA
 ThinkProgress | Environmental Groups Press EPA to Regulate Carbon Dioxide From Existing Power ... Bloomberg BNA By Andrew Childers WASHINGTON, DC--Environmental and public health advocates pressed the Environmental Protection Agency to regulate greenhouse gas emissions from existing power plants during a May 24 hearing on a proposal to limit carbon dioxide from ... Tell the EPA You Support Carbon Pollution Protections EPA vs. COAL – Locals Speak Out EPA holds 12-hour hearings with environmentalists to slow coal production |
Volcano Crystals Hold Clues to Next Big Eruption - BusinessWeek
 msnbc.com | Volcano Crystals Hold Clues to Next Big Eruption BusinessWeek Drawing from data of the explosions of Mount St. Helens in 1980 through 1986 in Washington, scientists found that iron- and magnesium-rich crystals grew before an eruption, according to a study in the journal Science. The most rapid growth happened in ... Crystals can help predict volcano eruptions, scientists say Magma crystals hold valuable clues to volcanic eruptions Volcanic Crystals Will Help Predict Eruptions - Scientists |
Ocean Acidification: The Local Story - The Daily Score
Ocean Acidification: The Local Story The Daily Score But as our knowledge of ocean acidification continues to evolve, it turns out that in hotspots like Washington State, local factors—from nutrient pollution to seasonal currents and maybe emissions from ships or our own traffic—are playing a role too. Blue Ribbon panel warns about dangers of ocean acidification |