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CM Automotive Systems, Inc.

News Release – 
Walnut, California, USA – May 12, 2011.


Rapid Tire Deflation

CM Automotive Systems introduces its Accelerated Deflation valve to improve CTIS deflation times. Our newest development is accomplished by adding a spring loaded sleeve into the throat of our standard deflation valve.

The sleeve requires no power connection, and the operation is automatic and pressure actuated.  During a high-ΔP deflation cycles, such as the Highway setting to Emergency, the spring loaded sleeve is forced against its retaining spring by the airflow into the manifold cavity.  This uncovers the additional row of orifices, opening up more flow area during the deflation cycle. The net effect of the sleeve movement is to increase the effective orifice area which translates into rapid deflation.

At lower tire pressures, when there is not enough air pressure to extend the sleeve, it remains retracted allowing only the center orifice to control the deflation flow rate.  This new simple device reduces deflation time by 40%.  This allows faster adjustment of the tire pressure, increasing vehicle mobility and providing a trouble-free operation.


News Release – 
Walnut, California, USA – November 24, 2009.


The CM Automotive Central Tire Inflation System (CTIS) is a state of the art electromechanical system that allows the driver to control the air pressure in the tires for improved performance of the tires and of the vehicle while the vehicle is either stationary or in motion.  The tires are permanently connected to a centrally-located pressure control unit through a wheel valve directly mounted to the wheel.

The direct-mounted wheel valve requires air to be routed from a port on the hub to the CTIS wheel valve and from the wheel valve to the tire cavity. No hoses are necessary.

The integration of the direct mount wheel valve to the wheel streamlines the CTIS installation by eliminating most of the ‘plumbing’ to and from the wheel valve.  Air channels are built inside the rim, and the wheel valve is mounted to the face of the wheel.  This design drastically reduces cost per tire, the number of components, possible leaks and it simplifies assembly, serviceability and maintenance.

Benefits of CM Automotive Systems Direct Mount Wheel Valve:

Direct Mount WV

Advantages: Components = 3, Hoses = 0, Wheel Valve Weight = ~ 4 oz

  • Lower costs
  • Simplified installation and serviceability
  • Less components (2 parts only)
  • Improved reliability and MTBF
  • Reduces logistic cost due to fewer components
  • Protective cover (optional)

Other Manufacture’s Wheel and Wheel Valve Requirements WV with Hoses

Disadvantages: Components = 13, Hoses = 3, Weight = ~ 4 lbs !!!

  • Cost ineffective
  • Excesive tire wear
  • Unsustainable speeds on high mobility vehicles
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